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pjs/xpcom/components/nsComponentManager.cpp

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113 KiB
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK *****
*
* This Original Code has been modified by IBM Corporation.
* Modifications made by IBM described herein are
* Copyright (c) International Business Machines
* Corporation, 2000
*
* Modifications to Mozilla code or documentation
* identified per MPL Section 3.3
*
* Date Modified by Description of modification
* 04/20/2000 IBM Corp. Added PR_CALLBACK for Optlink use in OS2
*/
#include <stdlib.h>
#include "nscore.h"
#include "nsISupports.h"
#include "nspr.h"
#include "nsCRT.h" // for atoll
// Arena used by component manager for storing contractid string, dll
// location strings and small objects
// CAUTION: Arena align mask needs to be defined before including plarena.h
// currently from nsComponentManager.h
#define PL_ARENA_CONST_ALIGN_MASK 7
#define NS_CM_BLOCK_SIZE (1024 * 8)
#include "nsAutoLock.h"
#include "nsCOMPtr.h"
#include "nsComponentManager.h"
#include "nsDirectoryService.h"
#include "nsDirectoryServiceDefs.h"
#include "nsCategoryManager.h"
#include "nsCategoryManagerUtils.h"
#include "nsIComponentLoader.h"
#include "nsIEnumerator.h"
#include "nsIInterfaceInfoManager.h"
#include "nsIModule.h"
#include "nsIObserverService.h"
#include "nsISimpleEnumerator.h"
#include "nsXPCOM.h"
#include "nsISupportsPrimitives.h"
#include "nsLocalFile.h"
#include "nsNativeComponentLoader.h"
#include "nsReadableUtils.h"
#include "nsString.h"
#include "nsXPIDLString.h"
#include "prcmon.h"
#include "xptinfo.h" // this after nsISupports, to pick up IID so that xpt stuff doesn't try to define it itself...
#include "nsInt64.h"
#include "nsManifestLineReader.h"
#include NEW_H // for placement new
#ifdef XP_BEOS
#include <FindDirectory.h>
#include <Path.h>
#endif
#include "prlog.h"
NS_COM PRLogModuleInfo* nsComponentManagerLog = nsnull;
#if 0 || defined (DEBUG_timeless)
#define SHOW_DENIED_ON_SHUTDOWN
#define SHOW_CI_ON_EXISTING_SERVICE
#define XPCOM_CHECK_PENDING_CIDS
#endif
// Loader Types
#define NS_LOADER_DATA_ALLOC_STEP 6
// Bloated registry buffer size to improve startup performance -- needs to
// be big enough to fit the entire file into memory or it'll thrash.
// 512K is big enough to allow for some future growth in the registry.
#define BIG_REGISTRY_BUFLEN (512*1024)
// Common Key Names
const char classIDKeyName[]="classID";
const char classesKeyName[]="contractID";
const char componentLoadersKeyName[]="componentLoaders";
const char componentsKeyName[]="components";
const char xpcomComponentsKeyName[]="software/mozilla/XPCOM/components";
const char xpcomKeyName[]="software/mozilla/XPCOM";
// Common Value Names
const char classIDValueName[]="ClassID";
const char classNameValueName[]="ClassName";
const char componentCountValueName[]="ComponentsCount";
const char componentTypeValueName[]="ComponentType";
const char contractIDValueName[]="ContractID";
const char fileSizeValueName[]="FileSize";
const char inprocServerValueName[]="InprocServer";
const char lastModValueName[]="LastModTimeStamp";
const char nativeComponentType[]="application/x-mozilla-native";
const char staticComponentType[]="application/x-mozilla-static";
const char versionValueName[]="VersionString";
const static char XPCOM_ABSCOMPONENT_PREFIX[] = "abs:";
const static char XPCOM_RELCOMPONENT_PREFIX[] = "rel:";
const static char XPCOM_GRECOMPONENT_PREFIX[] = "gre:";
static const char gIDFormat[] =
"{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}";
#define NS_EMPTY_IID \
{ \
0x00000000, \
0x0000, \
0x0000, \
{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} \
}
NS_DEFINE_CID(kEmptyCID, NS_EMPTY_IID);
NS_DEFINE_CID(kCategoryManagerCID, NS_CATEGORYMANAGER_CID);
#define UID_STRING_LENGTH 39
// Set to true from NS_ShutdownXPCOM.
extern PRBool gXPCOMShuttingDown;
static void GetIDString(const nsID& aCID, char buf[UID_STRING_LENGTH])
{
PR_snprintf(buf, UID_STRING_LENGTH, gIDFormat,
aCID.m0, (PRUint32) aCID.m1, (PRUint32) aCID.m2,
(PRUint32) aCID.m3[0], (PRUint32) aCID.m3[1],
(PRUint32) aCID.m3[2], (PRUint32) aCID.m3[3],
(PRUint32) aCID.m3[4], (PRUint32) aCID.m3[5],
(PRUint32) aCID.m3[6], (PRUint32) aCID.m3[7]);
}
nsresult
nsCreateInstanceFromCategory::operator()(const nsIID& aIID, void** aInstancePtr) const
{
/*
* If I were a real man, I would consolidate this with
* nsGetServiceFromContractID::operator().
*/
nsresult rv;
nsXPIDLCString value;
nsCOMPtr<nsIComponentManager> compMgr;
nsCOMPtr<nsICategoryManager> catman =
do_GetService(kCategoryManagerCID, &rv);
if (NS_FAILED(rv)) goto error;
if (!mCategory || !mEntry) {
// when categories have defaults, use that for null mEntry
rv = NS_ERROR_NULL_POINTER;
goto error;
}
/* find the contractID for category.entry */
rv = catman->GetCategoryEntry(mCategory, mEntry,
getter_Copies(value));
if (NS_FAILED(rv)) goto error;
if (!value) {
rv = NS_ERROR_SERVICE_NOT_AVAILABLE;
goto error;
}
NS_GetComponentManager(getter_AddRefs(compMgr));
if (!compMgr)
return NS_ERROR_FAILURE;
rv = compMgr->CreateInstanceByContractID(value, mOuter, aIID, aInstancePtr);
if (NS_FAILED(rv)) {
error:
*aInstancePtr = 0;
}
if (mErrorPtr)
*mErrorPtr = rv;
return rv;
}
nsresult
nsGetServiceFromCategory::operator()(const nsIID& aIID, void** aInstancePtr) const
{
nsresult rv;
nsXPIDLCString value;
nsCOMPtr<nsICategoryManager> catman;
nsComponentManagerImpl *compMgr = nsComponentManagerImpl::gComponentManager;
if (!compMgr) {
rv = NS_ERROR_NOT_INITIALIZED;
goto error;
}
if (!mCategory || !mEntry) {
// when categories have defaults, use that for null mEntry
rv = NS_ERROR_NULL_POINTER;
goto error;
}
rv = compMgr->nsComponentManagerImpl::GetService(kCategoryManagerCID,
NS_GET_IID(nsICategoryManager),
getter_AddRefs(catman));
if (NS_FAILED(rv)) goto error;
/* find the contractID for category.entry */
rv = catman->GetCategoryEntry(mCategory, mEntry,
getter_Copies(value));
if (NS_FAILED(rv)) goto error;
if (!value) {
rv = NS_ERROR_SERVICE_NOT_AVAILABLE;
goto error;
}
rv = compMgr->
nsComponentManagerImpl::GetServiceByContractID(value,
aIID, aInstancePtr);
if (NS_FAILED(rv)) {
error:
*aInstancePtr = 0;
}
if (mErrorPtr)
*mErrorPtr = rv;
return rv;
}
////////////////////////////////////////////////////////////////////////////////
// Arena helper functions
////////////////////////////////////////////////////////////////////////////////
char *
ArenaStrndup(const char *s, PRUint32 len, PLArenaPool *arena)
{
void *mem;
// Include trailing null in the len
PL_ARENA_ALLOCATE(mem, arena, len+1);
if (mem)
memcpy(mem, s, len+1);
return NS_STATIC_CAST(char *, mem);
}
char*
ArenaStrdup(const char *s, PLArenaPool *arena)
{
return ArenaStrndup(s, strlen(s), arena);
}
////////////////////////////////////////////////////////////////////////////////
// Hashtable Callbacks
////////////////////////////////////////////////////////////////////////////////
PRBool PR_CALLBACK
nsFactoryEntry_Destroy(nsHashKey *aKey, void *aData, void* closure);
PR_STATIC_CALLBACK(const void *)
factory_GetKey(PLDHashTable *aTable, PLDHashEntryHdr *aHdr)
{
nsFactoryTableEntry* entry = NS_STATIC_CAST(nsFactoryTableEntry*, aHdr);
return &entry->mFactoryEntry->mCid;
}
PR_STATIC_CALLBACK(PLDHashNumber)
factory_HashKey(PLDHashTable *aTable, const void *aKey)
{
const nsCID *cidp = NS_REINTERPRET_CAST(const nsCID*, aKey);
return cidp->m0;
}
PR_STATIC_CALLBACK(PRBool)
factory_MatchEntry(PLDHashTable *aTable, const PLDHashEntryHdr *aHdr,
const void *aKey)
{
const nsFactoryTableEntry* entry =
NS_STATIC_CAST(const nsFactoryTableEntry*, aHdr);
const nsCID *cidp = NS_REINTERPRET_CAST(const nsCID*, aKey);
return (entry->mFactoryEntry->mCid).Equals(*cidp);
}
PR_STATIC_CALLBACK(void)
factory_ClearEntry(PLDHashTable *aTable, PLDHashEntryHdr *aHdr)
{
nsFactoryTableEntry* entry = NS_STATIC_CAST(nsFactoryTableEntry*, aHdr);
// nsFactoryEntry is arena allocated. So we dont delete it.
// We call the destructor by hand.
entry->mFactoryEntry->~nsFactoryEntry();
PL_DHashClearEntryStub(aTable, aHdr);
}
static const PLDHashTableOps factory_DHashTableOps = {
PL_DHashAllocTable,
PL_DHashFreeTable,
factory_GetKey,
factory_HashKey,
factory_MatchEntry,
PL_DHashMoveEntryStub,
factory_ClearEntry,
PL_DHashFinalizeStub,
};
PR_STATIC_CALLBACK(void)
contractID_ClearEntry(PLDHashTable *aTable, PLDHashEntryHdr *aHdr)
{
nsContractIDTableEntry* entry = NS_STATIC_CAST(nsContractIDTableEntry*, aHdr);
if (entry->mFactoryEntry->mTypeIndex == NS_COMPONENT_TYPE_SERVICE_ONLY &&
entry->mFactoryEntry->mCid.Equals(kEmptyCID)) {
// this object is owned by the hash.
// nsFactoryEntry is arena allocated. So we dont delete it.
// We call the destructor by hand.
entry->mFactoryEntry->~nsFactoryEntry();
}
// contractIDs are arena allocated. No need to free them.
PL_DHashClearEntryStub(aTable, aHdr);
}
static const PLDHashTableOps contractID_DHashTableOps = {
PL_DHashAllocTable,
PL_DHashFreeTable,
PL_DHashGetKeyStub,
PL_DHashStringKey,
PL_DHashMatchStringKey,
PL_DHashMoveEntryStub,
contractID_ClearEntry,
PL_DHashFinalizeStub,
};
////////////////////////////////////////////////////////////////////////////////
// nsFactoryEntry
////////////////////////////////////////////////////////////////////////////////
MOZ_DECL_CTOR_COUNTER(nsFactoryEntry)
nsFactoryEntry::nsFactoryEntry(const nsCID &aClass,
const char *aLocation,
PRUint32 locationlen,
int aType,
class nsFactoryEntry* parent)
: mCid(aClass),
mTypeIndex(aType),
mParent(parent)
{
// Arena allocate the location string
mLocation = ArenaStrndup(aLocation, locationlen, &nsComponentManagerImpl::gComponentManager->mArena);
}
nsFactoryEntry::nsFactoryEntry(const nsCID &aClass,
nsIFactory *aFactory,
class nsFactoryEntry* parent)
: mCid(aClass),
mFactory(aFactory),
mTypeIndex(NS_COMPONENT_TYPE_FACTORY_ONLY),
mLocation(nsnull),
mParent(parent)
{
}
// nsFactoryEntry is usually arena allocated including the strings it
// holds. So we call destructor by hand.
nsFactoryEntry::~nsFactoryEntry(void)
{
// Release the reference to the factory
mFactory = nsnull;
// Release any service reference
mServiceObject = nsnull;
// nsFactoryEntry is arena allocated. So we dont delete it.
// We call the destructor by hand.
if (mParent)
mParent->~nsFactoryEntry();
}
nsresult
nsFactoryEntry::ReInit(const nsCID &aClass, const char *aLocation, int aType)
{
NS_ENSURE_TRUE(mTypeIndex != NS_COMPONENT_TYPE_FACTORY_ONLY, NS_ERROR_INVALID_ARG);
// cid has to match
// SERVICE_ONLY entries can be promoted to an entry of another type
NS_ENSURE_TRUE((mTypeIndex == NS_COMPONENT_TYPE_SERVICE_ONLY || mCid.Equals(aClass)),
NS_ERROR_INVALID_ARG);
// Arena allocate the location string
mLocation = ArenaStrdup(aLocation, &nsComponentManagerImpl::gComponentManager->mArena);
if (!mLocation)
return NS_ERROR_OUT_OF_MEMORY;
mTypeIndex = aType;
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
// Hashtable Enumeration
////////////////////////////////////////////////////////////////////////////////
typedef NS_CALLBACK(EnumeratorConverter)(PLDHashTable *table,
const PLDHashEntryHdr *hdr,
void *data,
nsISupports **retval);
class PLDHashTableEnumeratorImpl : public nsIBidirectionalEnumerator,
public nsISimpleEnumerator
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIENUMERATOR
NS_DECL_NSIBIDIRECTIONALENUMERATOR
NS_DECL_NSISIMPLEENUMERATOR
PLDHashTableEnumeratorImpl(PLDHashTable *table,
EnumeratorConverter converter,
void *converterData);
PRInt32 Count() { return mCount; }
private:
PLDHashTableEnumeratorImpl(); /* no implementation */
~PLDHashTableEnumeratorImpl();
NS_IMETHODIMP ReleaseElements();
nsVoidArray mElements;
PRInt32 mCount, mCurrent;
PRMonitor* mMonitor;
struct Closure {
PRBool succeeded;
EnumeratorConverter converter;
void *data;
PLDHashTableEnumeratorImpl *impl;
};
static PLDHashOperator PR_CALLBACK Enumerator(PLDHashTable *table,
PLDHashEntryHdr *hdr,
PRUint32 number,
void *data);
};
// static
PLDHashOperator PR_CALLBACK
PLDHashTableEnumeratorImpl::Enumerator(PLDHashTable *table,
PLDHashEntryHdr *hdr,
PRUint32 number,
void *data)
{
Closure *c = NS_REINTERPRET_CAST(Closure *, data);
nsISupports *converted;
if (NS_FAILED(c->converter(table, hdr, c->data, &converted)) ||
!c->impl->mElements.AppendElement(converted)) {
c->succeeded = PR_FALSE;
return PL_DHASH_STOP;
}
c->succeeded = PR_TRUE;
return PL_DHASH_NEXT;
}
PLDHashTableEnumeratorImpl::PLDHashTableEnumeratorImpl(PLDHashTable *table,
EnumeratorConverter converter,
void *converterData)
: mCurrent(0)
{
mMonitor = nsAutoMonitor::NewMonitor("PLDHashTableEnumeratorImpl");
NS_ASSERTION(mMonitor, "NULL Monitor");
nsAutoMonitor mon(mMonitor);
Closure c = { PR_FALSE, converter, converterData, this };
mCount = PL_DHashTableEnumerate(table, Enumerator, &c);
if (!c.succeeded) {
ReleaseElements();
mCount = 0;
}
}
NS_IMPL_ISUPPORTS3(PLDHashTableEnumeratorImpl,
nsIBidirectionalEnumerator,
nsIEnumerator,
nsISimpleEnumerator)
PLDHashTableEnumeratorImpl::~PLDHashTableEnumeratorImpl()
{
(void) ReleaseElements();
// Destroy the Lock
if (mMonitor)
nsAutoMonitor::DestroyMonitor(mMonitor);
}
NS_IMETHODIMP
PLDHashTableEnumeratorImpl::ReleaseElements()
{
for (PRInt32 i = 0; i < mCount; i++) {
nsISupports *supports = NS_REINTERPRET_CAST(nsISupports *,
mElements[i]);
NS_IF_RELEASE(supports);
}
return NS_OK;
}
NS_IMETHODIMP
PL_NewDHashTableEnumerator(PLDHashTable *table,
EnumeratorConverter converter,
void *converterData,
PLDHashTableEnumeratorImpl **retval)
{
PLDHashTableEnumeratorImpl *impl =
new PLDHashTableEnumeratorImpl(table, converter, converterData);
if (!impl)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(impl);
if (impl->Count() == -1) {
// conversion failed
NS_RELEASE(impl);
return NS_ERROR_FAILURE;
}
*retval = impl;
return NS_OK;
}
NS_IMETHODIMP
PLDHashTableEnumeratorImpl::First()
{
if (!mCount)
return NS_ERROR_FAILURE;
mCurrent = 0;
return NS_OK;
}
NS_IMETHODIMP
PLDHashTableEnumeratorImpl::Last()
{
if (!mCount)
return NS_ERROR_FAILURE;
mCurrent = mCount - 1;
return NS_OK;
}
NS_IMETHODIMP
PLDHashTableEnumeratorImpl::Prev()
{
if (!mCurrent)
return NS_ERROR_FAILURE;
mCurrent--;
return NS_OK;
}
NS_IMETHODIMP
PLDHashTableEnumeratorImpl::Next()
{
// If empty or we're past the end, or we are at the end return error
if (!mCount || (mCurrent == mCount) || (++mCurrent == mCount))
return NS_ERROR_FAILURE;
return NS_OK;
}
NS_IMETHODIMP
PLDHashTableEnumeratorImpl::CurrentItem(nsISupports **retval)
{
if (!mCount || mCurrent == mCount)
return NS_ERROR_FAILURE;
*retval = NS_REINTERPRET_CAST(nsISupports *, mElements[mCurrent]);
if (*retval)
NS_ADDREF(*retval);
return NS_OK;
}
NS_IMETHODIMP
PLDHashTableEnumeratorImpl::IsDone()
{
if (!mCount || (mCurrent == mCount))
return NS_OK;
return NS_ENUMERATOR_FALSE;
}
NS_IMETHODIMP
PLDHashTableEnumeratorImpl::HasMoreElements(PRBool *_retval)
{
if (!mCount || (mCurrent >= mCount - 1))
*_retval = PR_FALSE;
else
*_retval = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
PLDHashTableEnumeratorImpl::GetNext(nsISupports **_retval)
{
nsresult rv = Next();
if (NS_FAILED(rv)) return rv;
return CurrentItem(_retval);
}
static NS_IMETHODIMP
ConvertFactoryEntryToCID(PLDHashTable *table,
const PLDHashEntryHdr *hdr,
void *data, nsISupports **retval)
{
nsresult rv;
nsCOMPtr<nsISupportsID> wrapper;
nsComponentManagerImpl *cm = NS_STATIC_CAST(nsComponentManagerImpl *, data);
rv = cm->CreateInstanceByContractID(NS_SUPPORTS_ID_CONTRACTID, nsnull,
NS_GET_IID(nsISupportsID), getter_AddRefs(wrapper));
NS_ENSURE_SUCCESS(rv, rv);
const nsFactoryTableEntry *entry =
NS_REINTERPRET_CAST(const nsFactoryTableEntry *, hdr);
if (entry) {
nsFactoryEntry *fe = entry->mFactoryEntry;
wrapper->SetData(&fe->mCid);
*retval = wrapper;
NS_ADDREF(*retval);
return NS_OK;
}
*retval = nsnull;
return rv;
}
static NS_IMETHODIMP
ConvertContractIDKeyToString(PLDHashTable *table,
const PLDHashEntryHdr *hdr,
void *data, nsISupports **retval)
{
nsresult rv;
nsCOMPtr<nsISupportsCString> wrapper;
nsComponentManagerImpl *cm = NS_STATIC_CAST(nsComponentManagerImpl *, data);
rv = cm->CreateInstanceByContractID(NS_SUPPORTS_CSTRING_CONTRACTID, nsnull,
NS_GET_IID(nsISupportsCString), getter_AddRefs(wrapper));
NS_ENSURE_SUCCESS(rv, rv);
const nsContractIDTableEntry *entry =
NS_REINTERPRET_CAST(const nsContractIDTableEntry *, hdr);
wrapper->SetData(nsDependentCString(entry->mContractID,
entry->mContractIDLen));
*retval = wrapper;
NS_ADDREF(*retval);
return NS_OK;
}
// this is safe to call during InitXPCOM
static nsresult GetLocationFromDirectoryService(const char* prop,
nsIFile** aDirectory)
{
nsCOMPtr<nsIProperties> directoryService;
nsDirectoryService::Create(nsnull,
NS_GET_IID(nsIProperties),
getter_AddRefs(directoryService));
if (!directoryService)
return NS_ERROR_FAILURE;
return directoryService->Get(prop,
NS_GET_IID(nsIFile),
(void**)aDirectory);
}
////////////////////////////////////////////////////////////////////////////////
// nsComponentManagerImpl
////////////////////////////////////////////////////////////////////////////////
nsComponentManagerImpl::nsComponentManagerImpl()
:
mMon(NULL),
mNativeComponentLoader(0),
#ifdef ENABLE_STATIC_COMPONENT_LOADER
mStaticComponentLoader(0),
#endif
mShuttingDown(NS_SHUTDOWN_NEVERHAPPENED),
mLoaderData(nsnull),
mRegistryDirty(PR_FALSE)
{
mFactories.ops = nsnull;
mContractIDs.ops = nsnull;
}
nsresult nsComponentManagerImpl::Init(void)
{
PR_ASSERT(mShuttingDown != NS_SHUTDOWN_INPROGRESS);
if (mShuttingDown == NS_SHUTDOWN_INPROGRESS)
return NS_ERROR_FAILURE;
mShuttingDown = NS_SHUTDOWN_NEVERHAPPENED;
if (nsComponentManagerLog == nsnull)
{
nsComponentManagerLog = PR_NewLogModule("nsComponentManager");
}
// Initialize our arena
PL_INIT_ARENA_POOL(&mArena, "ComponentManagerArena", NS_CM_BLOCK_SIZE);
if (!mFactories.ops) {
if (!PL_DHashTableInit(&mFactories, &factory_DHashTableOps,
0, sizeof(nsFactoryTableEntry),
1024)) {
mFactories.ops = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
// Minimum alpha uses k=2 because nsFactoryTableEntry saves two
// words compared to what a chained hash table requires.
PL_DHashTableSetAlphaBounds(&mFactories,
0.875,
PL_DHASH_MIN_ALPHA(&mFactories, 2));
}
if (!mContractIDs.ops) {
if (!PL_DHashTableInit(&mContractIDs, &contractID_DHashTableOps,
0, sizeof(nsContractIDTableEntry),
1024)) {
mContractIDs.ops = nsnull;
return NS_ERROR_OUT_OF_MEMORY;
}
// Minimum alpha uses k=1 because nsContractIDTableEntry saves one
// word compared to what a chained hash table requires.
#if 0
PL_DHashTableSetAlphaBounds(&mContractIDs,
0.875,
PL_DHASH_MIN_ALPHA(&mContractIDs, 1));
#endif
}
if (mMon == nsnull) {
mMon = nsAutoMonitor::NewMonitor("nsComponentManagerImpl");
if (mMon == nsnull)
return NS_ERROR_OUT_OF_MEMORY;
}
if (mNativeComponentLoader == nsnull) {
/* Create the NativeComponentLoader */
mNativeComponentLoader = new nsNativeComponentLoader();
if (!mNativeComponentLoader)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(mNativeComponentLoader);
nsresult rv = mNativeComponentLoader->Init(this, nsnull);
if (NS_FAILED(rv))
return rv;
}
// Add predefined loaders
mLoaderData = (nsLoaderdata *) PR_Malloc(sizeof(nsLoaderdata) * NS_LOADER_DATA_ALLOC_STEP);
if (!mLoaderData)
return NS_ERROR_OUT_OF_MEMORY;
mMaxNLoaderData = NS_LOADER_DATA_ALLOC_STEP;
mNLoaderData = NS_COMPONENT_TYPE_NATIVE;
mLoaderData[mNLoaderData].type = PL_strdup(nativeComponentType);
mLoaderData[mNLoaderData].loader = mNativeComponentLoader;
NS_ADDREF(mLoaderData[mNLoaderData].loader);
mNLoaderData++;
#ifdef ENABLE_STATIC_COMPONENT_LOADER
if (mStaticComponentLoader == nsnull) {
extern nsresult NS_NewStaticComponentLoader(nsIComponentLoader **);
NS_NewStaticComponentLoader(&mStaticComponentLoader);
if (!mStaticComponentLoader)
return NS_ERROR_OUT_OF_MEMORY;
}
mLoaderData[mNLoaderData].type = PL_strdup(staticComponentType);
mLoaderData[mNLoaderData].loader = mStaticComponentLoader;
NS_ADDREF(mLoaderData[mNLoaderData].loader);
mNLoaderData++;
if (mStaticComponentLoader) {
/* Init the static loader */
mStaticComponentLoader->Init(this, nsnull);
}
#endif
GetLocationFromDirectoryService(NS_XPCOM_COMPONENT_DIR, getter_AddRefs(mComponentsDir));
if (!mComponentsDir)
return NS_ERROR_OUT_OF_MEMORY;
nsCAutoString componentDescriptor;
nsresult rv = mComponentsDir->GetNativePath(componentDescriptor);
if (NS_FAILED(rv))
return rv;
mComponentsOffset = componentDescriptor.Length();
GetLocationFromDirectoryService(NS_GRE_COMPONENT_DIR, getter_AddRefs(mGREComponentsDir));
if (mGREComponentsDir) {
nsresult rv = mGREComponentsDir->GetNativePath(componentDescriptor);
if (NS_FAILED(rv)) {
NS_WARNING("No GRE component manager");
return rv;
}
mGREComponentsOffset = componentDescriptor.Length();
}
GetLocationFromDirectoryService(NS_XPCOM_COMPONENT_REGISTRY_FILE,
getter_AddRefs(mRegistryFile));
if(!mRegistryFile) {
NS_WARNING("No Component Registry file was found in the directory service");
return NS_ERROR_FAILURE;
}
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG,
("nsComponentManager: Initialized."));
return NS_OK;
}
PRIntn PR_CALLBACK AutoRegEntryDestroy(nsHashKey *aKey, void *aData, void* aClosure)
{
delete (AutoRegEntry*)aData;
return kHashEnumerateNext;
}
nsresult nsComponentManagerImpl::Shutdown(void)
{
PR_ASSERT(mShuttingDown == NS_SHUTDOWN_NEVERHAPPENED);
if (mShuttingDown != NS_SHUTDOWN_NEVERHAPPENED)
return NS_ERROR_FAILURE;
mShuttingDown = NS_SHUTDOWN_INPROGRESS;
// Shutdown the component manager
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG, ("nsComponentManager: Beginning Shutdown."));
PRInt32 i;
// Write out our component data file.
if (mRegistryDirty) {
nsresult rv = WritePersistentRegistry();
if (NS_FAILED(rv)) {
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR, ("nsComponentManager: Could not write out perisistant registry."));
#ifdef DEBUG
printf("Could not write out perisistant registry!\n");
#endif
}
}
mAutoRegEntries.Reset(AutoRegEntryDestroy);
// Release all cached factories
if (mContractIDs.ops) {
PL_DHashTableFinish(&mContractIDs);
mContractIDs.ops = nsnull;
}
if (mFactories.ops) {
PL_DHashTableFinish(&mFactories);
mFactories.ops = nsnull;
}
// Unload libraries
UnloadLibraries(nsnull, NS_Shutdown);
// delete arena for strings and small objects
PL_FinishArenaPool(&mArena);
mComponentsDir = 0;
mCategoryManager = 0;
// Release all the component data - loaders and type strings
for (i=0; i < mNLoaderData; i++) {
NS_IF_RELEASE(mLoaderData[i].loader);
PL_strfree((char *)mLoaderData[i].type);
}
PR_Free(mLoaderData);
mLoaderData = nsnull;
// we have an extra reference on this one, which is probably a good thing
NS_IF_RELEASE(mNativeComponentLoader);
#ifdef ENABLE_STATIC_COMPONENT_LOADER
NS_IF_RELEASE(mStaticComponentLoader);
#endif
mShuttingDown = NS_SHUTDOWN_COMPLETE;
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG, ("nsComponentManager: Shutdown complete."));
return NS_OK;
}
nsComponentManagerImpl::~nsComponentManagerImpl()
{
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG, ("nsComponentManager: Beginning destruction."));
if (mShuttingDown != NS_SHUTDOWN_COMPLETE)
Shutdown();
if (mMon) {
nsAutoMonitor::DestroyMonitor(mMon);
}
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG, ("nsComponentManager: Destroyed."));
}
NS_IMPL_THREADSAFE_ISUPPORTS8(nsComponentManagerImpl,
nsIComponentManager,
nsIServiceManager,
nsISupportsWeakReference,
nsIInterfaceRequestor,
nsIComponentRegistrar,
nsIServiceManagerObsolete,
nsIComponentManagerObsolete,
nsIComponentLoaderManager)
nsresult
nsComponentManagerImpl::GetInterface(const nsIID & uuid, void **result)
{
if (uuid.Equals(NS_GET_IID(nsINativeComponentLoader)))
{
if (!mNativeComponentLoader)
return NS_ERROR_NOT_INITIALIZED;
return mNativeComponentLoader->QueryInterface(uuid, result);
}
NS_WARNING("This isn't supported");
// fall through to QI as anything QIable is a superset of what can be
// got via the GetInterface()
return QueryInterface(uuid, result);
}
////////////////////////////////////////////////////////////////////////////////
// nsComponentManagerImpl: Platform methods
////////////////////////////////////////////////////////////////////////////////
#define PERSISTENT_REGISTRY_VERSION_MINOR 5
#define PERSISTENT_REGISTRY_VERSION_MAJOR 0
AutoRegEntry::AutoRegEntry(const nsACString& name, PRInt64* modDate) :
mName(ToNewCString(name)),
mNameLen(name.Length()),
mData(nsnull),
mModDate(*modDate)
{
}
AutoRegEntry::~AutoRegEntry()
{
if (mName) PL_strfree(mName);
if (mData) PL_strfree(mData);
}
PRBool
AutoRegEntry::Modified(PRInt64 *date)
{
return !LL_EQ(*date, mModDate);
}
void
AutoRegEntry::SetOptionalData(const char* data)
{
if (mData)
PL_strfree(mData);
if (!data) {
mData = nsnull;
return;
}
mData = PL_strdup(data);
}
static
PRBool ReadSectionHeader(nsManifestLineReader& reader, const char *token)
{
while (1)
{
if (*reader.LinePtr() == '[')
{
char* p = reader.LinePtr() + (reader.LineLength() - 1);
if (*p != ']')
break;
*p = 0;
char* values[1];
int lengths[1];
if (2 != reader.ParseLine(values, lengths, 1))
break;
// ignore the leading '['
if (0 != PL_strcmp(values[0]+1, token))
break;
return PR_TRUE;
}
if (!reader.NextLine())
break;
}
return PR_FALSE;
}
nsresult
nsComponentManagerImpl::ReadPersistentRegistry()
{
// populate Category Manager. need to get this early so that we don't get
// skipped by 'goto out'
nsresult rv = GetService(kCategoryManagerCID,
NS_GET_IID(nsICategoryManager),
getter_AddRefs(mCategoryManager));
if (NS_FAILED(rv))
return rv;
nsAutoMonitor mon(mMon);
nsManifestLineReader reader;
if (!mComponentsDir)
return NS_ERROR_NOT_INITIALIZED; // this should have been set by Init().
PRFileDesc* fd = nsnull;
// Set From Init
if (!mRegistryFile) {
return NS_ERROR_FILE_NOT_FOUND;
}
nsCOMPtr<nsIFile> file;
mRegistryFile->Clone(getter_AddRefs(file));
if (!file)
return NS_ERROR_OUT_OF_MEMORY;
nsCOMPtr<nsILocalFile> localFile(do_QueryInterface(file));
rv = localFile->OpenNSPRFileDesc(PR_RDONLY, 0444, &fd);
if (NS_FAILED(rv))
return rv;
PRInt64 fileSize;
rv = localFile->GetFileSize(&fileSize);
if (NS_FAILED(rv))
{
PR_Close(fd);
return rv;
}
PRInt32 flen = nsInt64(fileSize);
if (flen == 0)
{
PR_Close(fd);
NS_WARNING("Persistent Registry Empty!");
return NS_OK; // ERROR CONDITION
}
char* registry = new char[flen+1];
if (!registry)
goto out;
if (flen > PR_Read(fd, registry, flen))
{
rv = NS_ERROR_FAILURE;
goto out;
}
registry[flen] = '\0';
reader.Init(registry, flen);
if (ReadSectionHeader(reader, "HEADER"))
goto out;
if (!reader.NextLine())
goto out;
char* values[6];
int lengths[6];
// VersionLiteral,major,minor
if (3 != reader.ParseLine(values, lengths, 3))
goto out;
// VersionLiteral
if (!nsDependentCString(values[0], lengths[0]).EqualsLiteral("Version"))
goto out;
// major
if (PERSISTENT_REGISTRY_VERSION_MAJOR != atoi(values[1]))
goto out;
// minor
if (PERSISTENT_REGISTRY_VERSION_MINOR != atoi(values[2]))
goto out;
if (ReadSectionHeader(reader, "COMPONENTS"))
goto out;
while (1)
{
if (!reader.NextLine())
break;
//name,last_modification_date[,optionaldata]
int parts = reader.ParseLine(values, lengths, 3);
if (2 > parts)
break;
PRInt64 a = nsCRT::atoll(values[1]);
AutoRegEntry *entry =
new AutoRegEntry(nsDependentCString(values[0], lengths[0]), &a);
if (!entry) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto out;
}
if (parts == 3)
entry->SetOptionalData(values[2]);
nsCStringKey key((const char*)values[0]);
mAutoRegEntries.Put(&key, entry);
}
if (ReadSectionHeader(reader, "CLASSIDS"))
goto out;
while (1)
{
if (!reader.NextLine())
break;
// cid,contract_id,type,class_name,inproc_server
if (5 != reader.ParseLine(values, lengths, 5))
break;
nsCID aClass;
if (!aClass.Parse(values[0]))
continue;
int loadertype = GetLoaderType(values[2]);
if (loadertype < 0) {
rv = AddLoaderType(values[2], &loadertype);
if (NS_FAILED(rv))
continue;
}
void *mem;
PL_ARENA_ALLOCATE(mem, &mArena, sizeof(nsFactoryEntry));
if (!mem) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto out;
}
nsFactoryEntry *entry = new (mem) nsFactoryEntry(aClass, values[4], lengths[4], loadertype);
if (!entry->mLocation) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto out;
}
nsFactoryTableEntry* factoryTableEntry =
NS_STATIC_CAST(nsFactoryTableEntry*,
PL_DHashTableOperate(&mFactories,
&aClass,
PL_DHASH_ADD));
if (!factoryTableEntry) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto out;
}
factoryTableEntry->mFactoryEntry = entry;
}
if (ReadSectionHeader(reader, "CONTRACTIDS"))
goto out;
while (1)
{
if (!reader.NextLine())
break;
//contractID,cid
if (2 != reader.ParseLine(values, lengths, 2))
break;
nsCID aClass;
if (!aClass.Parse(values[1]))
continue;
//need to find the location for this cid.
nsFactoryEntry *cidEntry = GetFactoryEntry(aClass);
if (!cidEntry || cidEntry->mTypeIndex < 0)
continue; //what should we really do?
nsContractIDTableEntry* contractIDTableEntry =
NS_STATIC_CAST(nsContractIDTableEntry*,
PL_DHashTableOperate(&mContractIDs,
values[0],
PL_DHASH_ADD));
if (!contractIDTableEntry) {
continue;
}
if (!contractIDTableEntry->mContractID) {
char *contractID = ArenaStrndup(values[0], lengths[0], &mArena);
if (!contractID) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto out;
}
contractIDTableEntry->mContractID = contractID;
contractIDTableEntry->mContractIDLen = lengths[0];
}
contractIDTableEntry->mFactoryEntry = cidEntry;
}
#ifdef XPCOM_CHECK_PENDING_CIDS
{
/*
* If you get Asserts when you define SHOW_CI_ON_EXISTING_SERVICE and want to
* track down their cause, then you should add the contracts listed by the
* assertion to abusedContracts. The next time you run your xpcom app, xpcom
* will assert the first time the object associated with the contract is
* instantiated (which in many cases is the source of the problem).
*
* If you're doing this then you might want to NOP and soft breakpoint the
* lines labeled: NOP_AND_BREAK.
*
* Otherwise XPCOM will refuse to create the object for the caller, which
* while reasonable at some level, will almost certainly cause the app to
* stop functioning normally.
*/
static char abusedContracts[][128] = {
/*// Example contracts:
"@mozilla.org/rdf/container;1",
"@mozilla.org/intl/charsetalias;1",
"@mozilla.org/locale/win32-locale;1",
"@mozilla.org/widget/lookandfeel/win;1",
// */
0
};
for (int i=0; abusedContracts[i] && *abusedContracts[i]; i++) {
nsFactoryEntry *entry = nsnull;
nsContractIDTableEntry* contractIDTableEntry =
NS_STATIC_CAST(nsContractIDTableEntry*,
PL_DHashTableOperate(&mContractIDs, abusedContracts[i],
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(contractIDTableEntry)) {
entry = contractIDTableEntry->mFactoryEntry;
AddPendingCID(entry->mCid);
}
}
}
#endif
if (ReadSectionHeader(reader, "CATEGORIES"))
goto out;
while (1)
{
if (!reader.NextLine())
break;
//type,name,value
if (3 != reader.ParseLine(values, lengths, 3))
break;
mCategoryManager->AddCategoryEntry(values[0],
values[1],
values[2],
PR_TRUE,
PR_TRUE,
0);
}
mRegistryDirty = PR_FALSE;
out:
if (fd)
PR_Close(fd);
if (registry)
delete [] registry;
return rv;
}
struct PersistentWriterArgs
{
PRFileDesc *mFD;
nsLoaderdata *mLoaderData;
};
PR_STATIC_CALLBACK(PLDHashOperator)
ContractIDWriter(PLDHashTable *table,
PLDHashEntryHdr *hdr,
PRUint32 number,
void *arg)
{
char *contractID = ((nsContractIDTableEntry*)hdr)->mContractID;
nsFactoryEntry *factoryEntry = ((nsContractIDTableEntry*)hdr)->mFactoryEntry;
// for now, we only save out the top most parent.
while (factoryEntry->mParent)
factoryEntry = factoryEntry->mParent;
if (factoryEntry->mTypeIndex < 0)
return PL_DHASH_NEXT;
PRFileDesc* fd = ((PersistentWriterArgs*)arg)->mFD;
char cidString[UID_STRING_LENGTH];
GetIDString(factoryEntry->mCid, cidString);
PR_fprintf(fd, "%s,%s\n", contractID, cidString); // what if this fails?
return PL_DHASH_NEXT;
}
PR_STATIC_CALLBACK(PLDHashOperator)
ClassIDWriter(PLDHashTable *table,
PLDHashEntryHdr *hdr,
PRUint32 number,
void *arg)
{
nsFactoryEntry *factoryEntry = ((nsFactoryTableEntry*)hdr)->mFactoryEntry;
PRFileDesc* fd = ((PersistentWriterArgs*)arg)->mFD;
nsLoaderdata *loaderData = ((PersistentWriterArgs*)arg)->mLoaderData;
// for now, we only save out the top most parent.
while (factoryEntry->mParent)
factoryEntry = factoryEntry->mParent;
if (factoryEntry->mTypeIndex < 0) {
return PL_DHASH_NEXT;
}
char cidString[UID_STRING_LENGTH];
GetIDString(factoryEntry->mCid, cidString);
char *contractID = nsnull, *className = nsnull;
nsCOMPtr<nsIClassInfo> classInfo = do_QueryInterface(factoryEntry->mFactory);
if (classInfo)
{
classInfo->GetContractID(&contractID);
classInfo->GetClassDescription(&className);
}
const char * loaderName = nsnull;
if (factoryEntry->mTypeIndex)
loaderName = loaderData[factoryEntry->mTypeIndex].type;
char* location = factoryEntry->mLocation;
// cid,contract_id,type,class_name,inproc_server
PR_fprintf(fd,
"%s,%s,%s,%s,%s\n",
cidString,
(contractID ? contractID : ""),
(loaderName ? loaderName : ""),
(className ? className : ""),
(location ? location : ""));
if (contractID)
PR_Free(contractID);
if (className)
PR_Free(className);
return PL_DHASH_NEXT;
}
PRIntn PR_CALLBACK
AutoRegEntryWriter(nsHashKey *aKey, void *aData, void* aClosure)
{
PRFileDesc* fd = (PRFileDesc*) aClosure;
AutoRegEntry* entry = (AutoRegEntry*) aData;
const char* extraData = entry->GetOptionalData();
const char *fmt;
if (extraData)
fmt = "%s,%lld,%s\n";
else
fmt = "%s,%lld\n";
PR_fprintf(fd, fmt, entry->GetName().get(), entry->GetDate(), extraData);
return PR_TRUE;
}
nsresult
nsComponentManagerImpl::WritePersistentRegistry()
{
if (!mRegistryFile)
return NS_ERROR_FAILURE; // this should have been set by Init().
nsCOMPtr<nsIFile> file;
mRegistryFile->Clone(getter_AddRefs(file));
if (!file)
return NS_ERROR_OUT_OF_MEMORY;
nsCOMPtr<nsILocalFile> localFile(do_QueryInterface(file));
nsCAutoString originalLeafName;
localFile->GetNativeLeafName(originalLeafName);
nsCAutoString leafName;
leafName.Assign(originalLeafName + NS_LITERAL_CSTRING(".tmp"));
localFile->SetNativeLeafName(leafName);
PRFileDesc* fd = nsnull;
nsresult rv = localFile->OpenNSPRFileDesc(PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE, 0666, &fd);
if (NS_FAILED(rv))
return rv;
if (PR_fprintf(fd, "Generated File. Do not edit.\n") == (PRUint32) -1) {
rv = NS_ERROR_UNEXPECTED;
goto out;
}
if (PR_fprintf(fd, "\n[HEADER]\nVersion,%d,%d\n",
PERSISTENT_REGISTRY_VERSION_MAJOR,
PERSISTENT_REGISTRY_VERSION_MINOR) == (PRUint32) -1) {
rv = NS_ERROR_UNEXPECTED;
goto out;
}
if (PR_fprintf(fd, "\n[COMPONENTS]\n") == (PRUint32) -1) {
rv = NS_ERROR_UNEXPECTED;
goto out;
}
mAutoRegEntries.Enumerate(AutoRegEntryWriter, (void*)fd);
PersistentWriterArgs args;
args.mFD = fd;
args.mLoaderData = mLoaderData;
if (PR_fprintf(fd, "\n[CLASSIDS]\n") == (PRUint32) -1) {
rv = NS_ERROR_UNEXPECTED;
goto out;
}
PL_DHashTableEnumerate(&mFactories, ClassIDWriter, (void*)&args);
if (PR_fprintf(fd, "\n[CONTRACTIDS]\n") == (PRUint32) -1) {
rv = NS_ERROR_UNEXPECTED;
goto out;
}
PL_DHashTableEnumerate(&mContractIDs, ContractIDWriter, (void*)&args);
if (PR_fprintf(fd, "\n[CATEGORIES]\n") == (PRUint32) -1) {
rv = NS_ERROR_UNEXPECTED;
goto out;
}
if (!mCategoryManager) {
NS_WARNING("Could not access category manager. Will not be able to save categories!");
rv = NS_ERROR_UNEXPECTED;
} else {
rv = mCategoryManager->WriteCategoryManagerToRegistry(fd);
}
out:
if (fd)
PR_Close(fd);
// don't create the file is there was a problem????
NS_ENSURE_SUCCESS(rv, rv);
if (!mRegistryFile)
return NS_ERROR_NOT_INITIALIZED;
PRBool exists;
if(NS_FAILED(mRegistryFile->Exists(&exists)))
return PR_FALSE;
if(exists && NS_FAILED(mRegistryFile->Remove(PR_FALSE)))
return PR_FALSE;
nsCOMPtr<nsIFile> parent;
mRegistryFile->GetParent(getter_AddRefs(parent));
rv = localFile->MoveToNative(parent, originalLeafName);
mRegistryDirty = PR_FALSE;
return rv;
}
////////////////////////////////////////////////////////////////////////////////
// Hash Functions
////////////////////////////////////////////////////////////////////////////////
nsresult
nsComponentManagerImpl::HashContractID(const char *aContractID,
PRUint32 aContractIDLen,
nsFactoryEntry *fe)
{
if(!aContractID || !aContractIDLen)
return NS_ERROR_NULL_POINTER;
nsAutoMonitor mon(mMon);
nsContractIDTableEntry* contractIDTableEntry =
NS_STATIC_CAST(nsContractIDTableEntry*,
PL_DHashTableOperate(&mContractIDs, aContractID,
PL_DHASH_ADD));
if (!contractIDTableEntry)
return NS_ERROR_OUT_OF_MEMORY;
NS_ASSERTION(!contractIDTableEntry->mContractID || !strcmp(contractIDTableEntry->mContractID, aContractID), "contractid conflict");
if (!contractIDTableEntry->mContractID) {
char *contractID = ArenaStrndup(aContractID, aContractIDLen, &mArena);
if (!contractID)
return NS_ERROR_OUT_OF_MEMORY;
contractIDTableEntry->mContractID = contractID;
contractIDTableEntry->mContractIDLen = aContractIDLen;
}
contractIDTableEntry->mFactoryEntry = fe;
return NS_OK;
}
/**
* LoadFactory()
*
* Given a FactoryEntry, this loads the dll if it has to, find the NSGetFactory
* symbol, calls the routine to create a new factory and returns it to the
* caller.
*
* No attempt is made to store the factory in any form anywhere.
*/
nsresult
nsComponentManagerImpl::LoadFactory(nsFactoryEntry *aEntry,
nsIFactory **aFactory)
{
if (!aFactory)
return NS_ERROR_NULL_POINTER;
*aFactory = nsnull;
nsresult rv;
rv = aEntry->GetFactory(aFactory, this);
if (NS_FAILED(rv)) {
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("nsComponentManager: FAILED to load factory from %s (%s)\n",
(const char *)aEntry->mLocation, mLoaderData[aEntry->mTypeIndex].type));
return rv;
}
return NS_OK;
}
nsFactoryEntry *
nsComponentManagerImpl::GetFactoryEntry(const char *aContractID,
PRUint32 aContractIDLen)
{
nsFactoryEntry *fe = nsnull;
{
nsAutoMonitor mon(mMon);
nsContractIDTableEntry* contractIDTableEntry =
NS_STATIC_CAST(nsContractIDTableEntry*,
PL_DHashTableOperate(&mContractIDs, aContractID,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(contractIDTableEntry)) {
fe = contractIDTableEntry->mFactoryEntry;
}
} //exit monitor
return fe;
}
nsFactoryEntry *
nsComponentManagerImpl::GetFactoryEntry(const nsCID &aClass)
{
nsFactoryEntry *entry = nsnull;
{
nsAutoMonitor mon(mMon);
nsFactoryTableEntry* factoryTableEntry =
NS_STATIC_CAST(nsFactoryTableEntry*,
PL_DHashTableOperate(&mFactories, &aClass,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(factoryTableEntry)) {
entry = factoryTableEntry->mFactoryEntry;
}
} // exit monitor
return entry;
}
/**
* FindFactory()
*
* Given a classID, this finds the factory for this CID by first searching the
* local CID<->factory mapping. Next it searches for a Dll that implements
* this classID and calls LoadFactory() to create the factory.
*
* Again, no attempt is made at storing the factory.
*/
nsresult
nsComponentManagerImpl::FindFactory(const nsCID &aClass,
nsIFactory **aFactory)
{
PR_ASSERT(aFactory != nsnull);
nsFactoryEntry *entry = GetFactoryEntry(aClass);
if (!entry)
return NS_ERROR_FACTORY_NOT_REGISTERED;
return entry->GetFactory(aFactory, this);
}
nsresult
nsComponentManagerImpl::FindFactory(const char *contractID,
PRUint32 aContractIDLen,
nsIFactory **aFactory)
{
PR_ASSERT(aFactory != nsnull);
nsFactoryEntry *entry = GetFactoryEntry(contractID, aContractIDLen);
if (!entry)
return NS_ERROR_FACTORY_NOT_REGISTERED;
return entry->GetFactory(aFactory, this);
}
/**
* GetClassObject()
*
* Given a classID, this finds the singleton ClassObject that implements the CID.
* Returns an interface of type aIID off the singleton classobject.
*/
nsresult
nsComponentManagerImpl::GetClassObject(const nsCID &aClass, const nsIID &aIID,
void **aResult)
{
nsresult rv;
nsCOMPtr<nsIFactory> factory;
#ifdef PR_LOGGING
if (PR_LOG_TEST(nsComponentManagerLog, PR_LOG_DEBUG))
{
char *buf = aClass.ToString();
PR_LogPrint("nsComponentManager: GetClassObject(%s)", buf);
if (buf)
PR_Free(buf);
}
#endif
PR_ASSERT(aResult != nsnull);
rv = FindFactory(aClass, getter_AddRefs(factory));
if (NS_FAILED(rv)) return rv;
rv = factory->QueryInterface(aIID, aResult);
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("\t\tGetClassObject() %s", NS_SUCCEEDED(rv) ? "succeeded" : "FAILED"));
return rv;
}
nsresult
nsComponentManagerImpl::GetClassObjectByContractID(const char *contractID,
const nsIID &aIID,
void **aResult)
{
nsresult rv;
nsCOMPtr<nsIFactory> factory;
#ifdef PR_LOGGING
if (PR_LOG_TEST(nsComponentManagerLog, PR_LOG_DEBUG))
{
PR_LogPrint("nsComponentManager: GetClassObject(%s)", contractID);
}
#endif
PR_ASSERT(aResult != nsnull);
rv = FindFactory(contractID, strlen(contractID), getter_AddRefs(factory));
if (NS_FAILED(rv)) return rv;
rv = factory->QueryInterface(aIID, aResult);
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("\t\tGetClassObject() %s", NS_SUCCEEDED(rv) ? "succeeded" : "FAILED"));
return rv;
}
/**
* ContractIDToClassID()
*
* Mapping function from a ContractID to a classID. Directly talks to the registry.
*
*/
nsresult
nsComponentManagerImpl::ContractIDToClassID(const char *aContractID, nsCID *aClass)
{
NS_PRECONDITION(aContractID != nsnull, "null ptr");
if (!aContractID)
return NS_ERROR_NULL_POINTER;
NS_PRECONDITION(aClass != nsnull, "null ptr");
if (!aClass)
return NS_ERROR_NULL_POINTER;
nsresult rv = NS_ERROR_FACTORY_NOT_REGISTERED;
nsFactoryEntry *fe = GetFactoryEntry(aContractID, strlen(aContractID));
if (fe) {
*aClass = fe->mCid;
rv = NS_OK;
}
#ifdef PR_LOGGING
if (PR_LOG_TEST(nsComponentManagerLog, PR_LOG_WARNING)) {
char *buf = 0;
if (NS_SUCCEEDED(rv))
buf = aClass->ToString();
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("nsComponentManager: ContractIDToClassID(%s)->%s", aContractID,
NS_SUCCEEDED(rv) ? buf : "[FAILED]"));
if (buf)
PR_Free(buf);
}
#endif
return rv;
}
/**
* CLSIDToContractID()
*
* Translates a classID to a {ContractID, Class Name}. Does direct registry
* access to do the translation.
*
* NOTE: Since this isn't heavily used, we arent caching this.
*/
nsresult
nsComponentManagerImpl::CLSIDToContractID(const nsCID &aClass,
char* *aClassName,
char* *aContractID)
{
NS_WARNING("Need to implement CLSIDToContractID");
nsresult rv = NS_ERROR_FACTORY_NOT_REGISTERED;
#ifdef PR_LOGGING
if (PR_LOG_TEST(nsComponentManagerLog, PR_LOG_WARNING))
{
char *buf = aClass.ToString();
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("nsComponentManager: CLSIDToContractID(%s)->%s", buf,
NS_SUCCEEDED(rv) ? *aContractID : "[FAILED]"));
if (buf)
PR_Free(buf);
}
#endif
return rv;
}
#ifdef XPCOM_CHECK_PENDING_CIDS
// This method must be called from within the mMon monitor
nsresult
nsComponentManagerImpl::AddPendingCID(const nsCID &aClass)
{
int max = mPendingCIDs.Count();
for (int index = 0; index < max; index++)
{
nsCID *cidp = (nsCID*) mPendingCIDs.ElementAt(index);
NS_ASSERTION(cidp, "Bad CID in pending list");
if (cidp->Equals(aClass)) {
nsXPIDLCString cid;
cid.Adopt(aClass.ToString());
nsCAutoString message;
message = NS_LITERAL_CSTRING("Creation of \"") +
cid + NS_LITERAL_CSTRING("\" in progress (Reentrant GS - see bug 194568)");
// Note that you may see this assertion by near-simultaneous
// calls to GetService on multiple threads.
NS_WARNING(message.get());
return NS_ERROR_NOT_AVAILABLE;
}
}
mPendingCIDs.AppendElement((void*)&aClass);
return NS_OK;
}
// This method must be called from within the mMon monitor
void
nsComponentManagerImpl::RemovePendingCID(const nsCID &aClass)
{
mPendingCIDs.RemoveElement((void*)&aClass);
}
#endif
/**
* CreateInstance()
*
* Create an instance of an object that implements an interface and belongs
* to the implementation aClass using the factory. The factory is immediately
* released and not held onto for any longer.
*/
nsresult
nsComponentManagerImpl::CreateInstance(const nsCID &aClass,
nsISupports *aDelegate,
const nsIID &aIID,
void **aResult)
{
// test this first, since there's no point in creating a component during
// shutdown -- whether it's available or not would depend on the order it
// occurs in the list
if (gXPCOMShuttingDown) {
// When processing shutdown, dont process new GetService() requests
#ifdef SHOW_DENIED_ON_SHUTDOWN
nsXPIDLCString cid, iid;
cid.Adopt(aClass.ToString());
iid.Adopt(aIID.ToString());
fprintf(stderr, "Creating new instance on shutdown. Denied.\n"
" CID: %s\n IID: %s\n", cid.get(), iid.get());
#endif /* SHOW_DENIED_ON_SHUTDOWN */
return NS_ERROR_UNEXPECTED;
}
if (aResult == nsnull)
{
return NS_ERROR_NULL_POINTER;
}
*aResult = nsnull;
nsFactoryEntry *entry = GetFactoryEntry(aClass);
if (!entry)
return NS_ERROR_FACTORY_NOT_REGISTERED;
#ifdef SHOW_CI_ON_EXISTING_SERVICE
if (entry->mServiceObject) {
nsXPIDLCString cid;
cid.Adopt(aClass.ToString());
nsCAutoString message;
message = NS_LITERAL_CSTRING("You are calling CreateInstance \"") +
cid + NS_LITERAL_CSTRING("\" when a service for this CID already exists!");
NS_ERROR(message.get());
}
#endif
nsIFactory *factory = nsnull;
nsresult rv = entry->GetFactory(&factory, this);
if (NS_SUCCEEDED(rv))
{
rv = factory->CreateInstance(aDelegate, aIID, aResult);
NS_RELEASE(factory);
}
else
{
// Translate error values
rv = NS_ERROR_FACTORY_NOT_REGISTERED;
}
#ifdef PR_LOGGING
if (PR_LOG_TEST(nsComponentManagerLog, PR_LOG_WARNING))
{
char *buf = aClass.ToString();
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("nsComponentManager: CreateInstance(%s) %s", buf,
NS_SUCCEEDED(rv) ? "succeeded" : "FAILED"));
if (buf)
PR_Free(buf);
}
#endif
return rv;
}
/**
* CreateInstanceByContractID()
*
* A variant of CreateInstance() that creates an instance of the object that
* implements the interface aIID and whose implementation has a contractID aContractID.
*
* This is only a convenience routine that turns around can calls the
* CreateInstance() with classid and iid.
*/
nsresult
nsComponentManagerImpl::CreateInstanceByContractID(const char *aContractID,
nsISupports *aDelegate,
const nsIID &aIID,
void **aResult)
{
// test this first, since there's no point in creating a component during
// shutdown -- whether it's available or not would depend on the order it
// occurs in the list
if (gXPCOMShuttingDown) {
// When processing shutdown, dont process new GetService() requests
#ifdef SHOW_DENIED_ON_SHUTDOWN
nsXPIDLCString iid;
iid.Adopt(aIID.ToString());
fprintf(stderr, "Creating new instance on shutdown. Denied.\n"
" ContractID: %s\n IID: %s\n", aContractID, iid.get());
#endif /* SHOW_DENIED_ON_SHUTDOWN */
return NS_ERROR_UNEXPECTED;
}
if (aResult == nsnull)
{
return NS_ERROR_NULL_POINTER;
}
*aResult = nsnull;
nsFactoryEntry *entry = GetFactoryEntry(aContractID, strlen(aContractID));
if (!entry)
return NS_ERROR_FACTORY_NOT_REGISTERED;
#ifdef SHOW_CI_ON_EXISTING_SERVICE
if (entry->mServiceObject) {
nsCAutoString message;
message =
NS_LITERAL_CSTRING("You are calling CreateInstance \"") +
nsDependentCString(aContractID) +
NS_LITERAL_CSTRING("\" when a service for this CID already exists! "
"Add it to abusedContracts to track down the service consumer.");
NS_ERROR(message.get());
}
#endif
nsIFactory *factory = nsnull;
nsresult rv = entry->GetFactory(&factory, this);
if (NS_SUCCEEDED(rv))
{
rv = factory->CreateInstance(aDelegate, aIID, aResult);
NS_RELEASE(factory);
}
else
{
// Translate error values
rv = NS_ERROR_FACTORY_NOT_REGISTERED;
}
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("nsComponentManager: CreateInstanceByContractID(%s) %s", aContractID,
NS_SUCCEEDED(rv) ? "succeeded" : "FAILED"));
return rv;
}
// Service Manager Impl
static
PLDHashOperator PR_CALLBACK
FreeServiceFactoryEntryEnumerate(PLDHashTable *aTable,
PLDHashEntryHdr *aHdr,
PRUint32 aNumber,
void *aData)
{
nsFactoryTableEntry* entry = NS_STATIC_CAST(nsFactoryTableEntry*, aHdr);
if (!entry->mFactoryEntry)
return PL_DHASH_NEXT;
nsFactoryEntry* factoryEntry = entry->mFactoryEntry;
factoryEntry->mServiceObject = nsnull;
return PL_DHASH_NEXT;
}
static
PLDHashOperator PR_CALLBACK
FreeServiceContractIDEntryEnumerate(PLDHashTable *aTable,
PLDHashEntryHdr *aHdr,
PRUint32 aNumber,
void *aData)
{
nsContractIDTableEntry* entry = NS_STATIC_CAST(nsContractIDTableEntry*, aHdr);
if (!entry->mFactoryEntry)
return PL_DHASH_NEXT;
nsFactoryEntry* factoryEntry = entry->mFactoryEntry;
factoryEntry->mServiceObject = nsnull;
return PL_DHASH_NEXT;
}
nsresult
nsComponentManagerImpl::FreeServices()
{
NS_ASSERTION(gXPCOMShuttingDown, "Must be shutting down in order to free all services");
if (!gXPCOMShuttingDown)
return NS_ERROR_FAILURE;
if (mContractIDs.ops) {
PL_DHashTableEnumerate(&mContractIDs, FreeServiceContractIDEntryEnumerate, nsnull);
}
if (mFactories.ops) {
PL_DHashTableEnumerate(&mFactories, FreeServiceFactoryEntryEnumerate, nsnull);
}
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::GetService(const nsCID& aClass,
const nsIID& aIID,
void* *result)
{
// test this first, since there's no point in returning a service during
// shutdown -- whether it's available or not would depend on the order it
// occurs in the list
if (gXPCOMShuttingDown) {
// When processing shutdown, dont process new GetService() requests
#ifdef SHOW_DENIED_ON_SHUTDOWN
nsXPIDLCString cid, iid;
cid.Adopt(aClass.ToString());
iid.Adopt(aIID.ToString());
fprintf(stderr, "Getting service on shutdown. Denied.\n"
" CID: %s\n IID: %s\n", cid.get(), iid.get());
#endif /* SHOW_DENIED_ON_SHUTDOWN */
return NS_ERROR_UNEXPECTED;
}
nsAutoMonitor mon(mMon);
nsresult rv = NS_OK;
nsIDKey key(aClass);
nsFactoryEntry* entry = nsnull;
nsFactoryTableEntry* factoryTableEntry =
NS_STATIC_CAST(nsFactoryTableEntry*,
PL_DHashTableOperate(&mFactories, &aClass,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(factoryTableEntry)) {
entry = factoryTableEntry->mFactoryEntry;
}
if (entry && entry->mServiceObject) {
nsCOMPtr<nsISupports> supports = entry->mServiceObject;
mon.Exit();
return supports->QueryInterface(aIID, result);
}
#ifdef XPCOM_CHECK_PENDING_CIDS
rv = AddPendingCID(aClass);
if (NS_FAILED(rv))
return rv; // NOP_AND_BREAK
#endif
nsCOMPtr<nsISupports> service;
// We need to not be holding the service manager's monitor while calling
// CreateInstance, because it invokes user code which could try to re-enter
// the service manager:
mon.Exit();
rv = CreateInstance(aClass, nsnull, aIID, getter_AddRefs(service));
mon.Enter();
#ifdef XPCOM_CHECK_PENDING_CIDS
RemovePendingCID(aClass);
#endif
if (NS_FAILED(rv))
return rv;
if (!entry) { // second hash lookup for GetService
nsFactoryTableEntry* factoryTableEntry =
NS_STATIC_CAST(nsFactoryTableEntry*,
PL_DHashTableOperate(&mFactories, &aClass,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(factoryTableEntry)) {
entry = factoryTableEntry->mFactoryEntry;
}
NS_ASSERTION(entry, "we should have a factory entry since CI succeeded - we should not get here");
if (!entry) return NS_ERROR_FAILURE;
}
entry->mServiceObject = service;
*result = service.get();
NS_ADDREF(NS_STATIC_CAST(nsISupports*, (*result)));
return rv;
}
NS_IMETHODIMP
nsComponentManagerImpl::RegisterService(const nsCID& aClass, nsISupports* aService)
{
nsAutoMonitor mon(mMon);
// check to see if we have a factory entry for the service
nsFactoryEntry *entry = GetFactoryEntry(aClass);
if (!entry) { // XXXdougt - should we require that all services register factories?? probably not.
void *mem;
PL_ARENA_ALLOCATE(mem, &mArena, sizeof(nsFactoryEntry));
if (!mem)
return NS_ERROR_OUT_OF_MEMORY;
entry = new (mem) nsFactoryEntry(aClass, nsnull);
entry->mTypeIndex = NS_COMPONENT_TYPE_SERVICE_ONLY;
nsFactoryTableEntry* factoryTableEntry =
NS_STATIC_CAST(nsFactoryTableEntry*,
PL_DHashTableOperate(&mFactories, &aClass,
PL_DHASH_ADD));
if (!factoryTableEntry)
return NS_ERROR_OUT_OF_MEMORY;
factoryTableEntry->mFactoryEntry = entry;
}
else {
if (entry->mServiceObject)
return NS_ERROR_FAILURE;
}
entry->mServiceObject = aService;
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::UnregisterService(const nsCID& aClass)
{
nsresult rv = NS_OK;
nsFactoryEntry* entry = nsnull;
nsAutoMonitor mon(mMon);
nsFactoryTableEntry* factoryTableEntry =
NS_STATIC_CAST(nsFactoryTableEntry*,
PL_DHashTableOperate(&mFactories, &aClass,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(factoryTableEntry)) {
entry = factoryTableEntry->mFactoryEntry;
}
if (!entry || !entry->mServiceObject)
return NS_ERROR_SERVICE_NOT_AVAILABLE;
entry->mServiceObject = nsnull;
return rv;
}
NS_IMETHODIMP
nsComponentManagerImpl::RegisterService(const char* aContractID, nsISupports* aService)
{
nsAutoMonitor mon(mMon);
// check to see if we have a factory entry for the service
PRUint32 contractIDLen = strlen(aContractID);
nsFactoryEntry *entry = GetFactoryEntry(aContractID, contractIDLen);
if (!entry) { // XXXdougt - should we require that all services register factories?? probably not.
void *mem;
PL_ARENA_ALLOCATE(mem, &mArena, sizeof(nsFactoryEntry));
if (!mem)
return NS_ERROR_OUT_OF_MEMORY;
entry = new (mem) nsFactoryEntry(kEmptyCID, nsnull);
entry->mTypeIndex = NS_COMPONENT_TYPE_SERVICE_ONLY;
nsContractIDTableEntry* contractIDTableEntry =
NS_STATIC_CAST(nsContractIDTableEntry*,
PL_DHashTableOperate(&mContractIDs, aContractID,
PL_DHASH_ADD));
if (!contractIDTableEntry) {
delete entry;
return NS_ERROR_OUT_OF_MEMORY;
}
if (!contractIDTableEntry->mContractID) {
char *contractID = ArenaStrndup(aContractID, contractIDLen, &mArena);
if (!contractID)
return NS_ERROR_OUT_OF_MEMORY;
contractIDTableEntry->mContractID = contractID;
contractIDTableEntry->mContractIDLen = contractIDLen;
}
contractIDTableEntry->mFactoryEntry = entry;
}
else {
if (entry->mServiceObject)
return NS_ERROR_FAILURE;
}
entry->mServiceObject = aService;
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::IsServiceInstantiated(const nsCID & aClass,
const nsIID& aIID,
PRBool *result)
{
// Now we want to get the service if we already got it. If not, we dont want
// to create an instance of it. mmh!
// test this first, since there's no point in returning a service during
// shutdown -- whether it's available or not would depend on the order it
// occurs in the list
if (gXPCOMShuttingDown) {
// When processing shutdown, dont process new GetService() requests
#ifdef SHOW_DENIED_ON_SHUTDOWN
nsXPIDLCString cid, iid;
cid.Adopt(aClass.ToString());
iid.Adopt(aIID.ToString());
fprintf(stderr, "Checking for service on shutdown. Denied.\n"
" CID: %s\n IID: %s\n", cid.get(), iid.get());
#endif /* SHOW_DENIED_ON_SHUTDOWN */
return NS_ERROR_UNEXPECTED;
}
nsresult rv = NS_ERROR_SERVICE_NOT_AVAILABLE;
nsFactoryEntry* entry = nsnull;
nsFactoryTableEntry* factoryTableEntry =
NS_STATIC_CAST(nsFactoryTableEntry*,
PL_DHashTableOperate(&mFactories, &aClass,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(factoryTableEntry)) {
entry = factoryTableEntry->mFactoryEntry;
}
if (entry && entry->mServiceObject) {
nsCOMPtr<nsISupports> service;
rv = entry->mServiceObject->QueryInterface(aIID, getter_AddRefs(service));
*result = (service!=nsnull);
}
return rv;
}
NS_IMETHODIMP nsComponentManagerImpl::IsServiceInstantiatedByContractID(const char *aContractID,
const nsIID& aIID,
PRBool *result)
{
// Now we want to get the service if we already got it. If not, we dont want
// to create an instance of it. mmh!
// test this first, since there's no point in returning a service during
// shutdown -- whether it's available or not would depend on the order it
// occurs in the list
if (gXPCOMShuttingDown) {
// When processing shutdown, dont process new GetService() requests
#ifdef SHOW_DENIED_ON_SHUTDOWN
nsXPIDLCString iid;
iid.Adopt(aIID.ToString());
fprintf(stderr, "Checking for service on shutdown. Denied.\n"
" ContractID: %s\n IID: %s\n", aContractID, iid.get());
#endif /* SHOW_DENIED_ON_SHUTDOWN */
return NS_ERROR_UNEXPECTED;
}
nsresult rv = NS_ERROR_SERVICE_NOT_AVAILABLE;
nsFactoryEntry *entry = nsnull;
{
nsAutoMonitor mon(mMon);
nsContractIDTableEntry* contractIDTableEntry =
NS_STATIC_CAST(nsContractIDTableEntry*,
PL_DHashTableOperate(&mContractIDs, aContractID,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(contractIDTableEntry)) {
entry = contractIDTableEntry->mFactoryEntry;
}
} // exit monitor
if (entry && entry->mServiceObject) {
nsCOMPtr<nsISupports> service;
rv = entry->mServiceObject->QueryInterface(aIID, getter_AddRefs(service));
*result = (service!=nsnull);
}
return rv;
}
NS_IMETHODIMP
nsComponentManagerImpl::UnregisterService(const char* aContractID)
{
nsresult rv = NS_OK;
nsAutoMonitor mon(mMon);
nsFactoryEntry *entry = nsnull;
nsContractIDTableEntry* contractIDTableEntry =
NS_STATIC_CAST(nsContractIDTableEntry*,
PL_DHashTableOperate(&mContractIDs, aContractID,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(contractIDTableEntry)) {
entry = contractIDTableEntry->mFactoryEntry;
}
if (!entry || !entry->mServiceObject)
return NS_ERROR_SERVICE_NOT_AVAILABLE;
entry->mServiceObject = nsnull;
return rv;
}
NS_IMETHODIMP
nsComponentManagerImpl::GetServiceByContractID(const char* aContractID,
const nsIID& aIID,
void* *result)
{
// test this first, since there's no point in returning a service during
// shutdown -- whether it's available or not would depend on the order it
// occurs in the list
if (gXPCOMShuttingDown) {
// When processing shutdown, dont process new GetService() requests
#ifdef SHOW_DENIED_ON_SHUTDOWN
nsXPIDLCString iid;
iid.Adopt(aIID.ToString());
fprintf(stderr, "Getting service on shutdown. Denied.\n"
" ContractID: %s\n IID: %s\n", aContractID, iid.get());
#endif /* SHOW_DENIED_ON_SHUTDOWN */
return NS_ERROR_UNEXPECTED;
}
nsAutoMonitor mon(mMon);
nsresult rv = NS_OK;
nsFactoryEntry *entry = nsnull;
nsContractIDTableEntry* contractIDTableEntry =
NS_STATIC_CAST(nsContractIDTableEntry*,
PL_DHashTableOperate(&mContractIDs, aContractID,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(contractIDTableEntry)) {
entry = contractIDTableEntry->mFactoryEntry;
}
if (entry) {
if (entry->mServiceObject) {
nsCOMPtr<nsISupports> serviceObject = entry->mServiceObject;
// We need to not be holding the service manager's monitor while calling
// QueryInterface, because it invokes user code which could try to re-enter
// the service manager, or try to grab some other lock/monitor/condvar
// and deadlock, e.g. bug 282743.
mon.Exit();
return serviceObject->QueryInterface(aIID, result);
}
#ifdef XPCOM_CHECK_PENDING_CIDS
rv = AddPendingCID(entry->mCid);
if (NS_FAILED(rv))
return rv; // NOP_AND_BREAK
#endif
}
nsCOMPtr<nsISupports> service;
// We need to not be holding the service manager's monitor while calling
// CreateInstance, because it invokes user code which could try to re-enter
// the service manager:
mon.Exit();
rv = CreateInstanceByContractID(aContractID, nsnull, aIID, getter_AddRefs(service));
mon.Enter();
#ifdef XPCOM_CHECK_PENDING_CIDS
if (entry)
RemovePendingCID(entry->mCid);
#endif
if (NS_FAILED(rv))
return rv;
if (!entry) { // second hash lookup for GetService
nsContractIDTableEntry* contractIDTableEntry =
NS_STATIC_CAST(nsContractIDTableEntry*,
PL_DHashTableOperate(&mContractIDs, aContractID,
PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(contractIDTableEntry)) {
entry = contractIDTableEntry->mFactoryEntry;
}
NS_ASSERTION(entry, "we should have a factory entry since CI succeeded - we should not get here");
if (!entry) return NS_ERROR_FAILURE;
}
entry->mServiceObject = service;
*result = service.get();
NS_ADDREF(NS_STATIC_CAST(nsISupports*, *result));
return rv;
}
NS_IMETHODIMP
nsComponentManagerImpl::GetService(const nsCID& aClass, const nsIID& aIID,
nsISupports* *result,
nsIShutdownListener* shutdownListener)
{
return GetService(aClass, aIID, (void**)result);
}
NS_IMETHODIMP
nsComponentManagerImpl::GetService(const char* aContractID, const nsIID& aIID,
nsISupports* *result,
nsIShutdownListener* shutdownListener)
{
return GetServiceByContractID(aContractID, aIID, (void**)result);
}
NS_IMETHODIMP
nsComponentManagerImpl::ReleaseService(const nsCID& aClass, nsISupports* service,
nsIShutdownListener* shutdownListener)
{
NS_IF_RELEASE(service);
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::ReleaseService(const char* aContractID, nsISupports* service,
nsIShutdownListener* shutdownListener)
{
NS_IF_RELEASE(service);
return NS_OK;
}
/*
* I want an efficient way to allocate a buffer to the right size
* and stick the prefix and dllName in, then be able to hand that buffer
* off to the FactoryEntry. Is that so wrong?
*
* *regName is allocated on success.
*
* This should live in nsNativeComponentLoader.cpp, I think.
*/
static nsresult
MakeRegistryName(const char *aDllName, const char *prefix, char **regName)
{
char *registryName;
PRUint32 len = strlen(prefix);
PRUint32 registryNameLen = strlen(aDllName) + len;
registryName = (char *)nsMemory::Alloc(registryNameLen + 1);
// from here on it, we want len sans terminating NUL
if (!registryName)
return NS_ERROR_OUT_OF_MEMORY;
memcpy(registryName, prefix, len);
strcpy(registryName + len, aDllName);
registryName[registryNameLen] = '\0';
*regName = registryName;
#ifdef DEBUG_shaver_off
fprintf(stderr, "MakeRegistryName(%s, %s, &[%s])\n",
aDllName, prefix, *regName);
#endif
return NS_OK;
}
nsresult
nsComponentManagerImpl::RegistryLocationForSpec(nsIFile *aSpec,
char **aRegistryName)
{
nsresult rv;
if (!mComponentsDir)
return NS_ERROR_NOT_INITIALIZED;
if (!aSpec) {
*aRegistryName = PL_strdup("");
return NS_OK;
}
// First check to see if this component is in the application
// components directory
PRBool containedIn;
mComponentsDir->Contains(aSpec, PR_TRUE, &containedIn);
nsCAutoString nativePathString;
if (containedIn){
rv = aSpec->GetNativePath(nativePathString);
if (NS_FAILED(rv))
return rv;
const char* relativeLocation = nativePathString.get() + mComponentsOffset + 1;
return MakeRegistryName(relativeLocation, XPCOM_RELCOMPONENT_PREFIX, aRegistryName);
}
// Next check to see if this component is in the GRE
// components directory
mGREComponentsDir->Contains(aSpec, PR_TRUE, &containedIn);
if (containedIn){
rv = aSpec->GetNativePath(nativePathString);
if (NS_FAILED(rv))
return rv;
const char* relativeLocation = nativePathString.get() + mGREComponentsOffset + 1;
return MakeRegistryName(relativeLocation, XPCOM_GRECOMPONENT_PREFIX, aRegistryName);
}
/* absolute names include volume info on Mac, so persistent descriptor */
rv = aSpec->GetNativePath(nativePathString);
if (NS_FAILED(rv))
return rv;
return MakeRegistryName(nativePathString.get(), XPCOM_ABSCOMPONENT_PREFIX, aRegistryName);
}
nsresult
nsComponentManagerImpl::SpecForRegistryLocation(const char *aLocation,
nsIFile **aSpec)
{
// i18n: assuming aLocation is encoded for the current locale
nsresult rv;
if (!aLocation || !aSpec)
return NS_ERROR_NULL_POINTER;
/* abs:/full/path/to/libcomponent.so */
if (!strncmp(aLocation, XPCOM_ABSCOMPONENT_PREFIX, 4)) {
nsLocalFile* file = new nsLocalFile;
if (!file) return NS_ERROR_FAILURE;
rv = file->InitWithNativePath(nsDependentCString((char *)aLocation + 4));
file->QueryInterface(NS_GET_IID(nsILocalFile), (void**)aSpec);
return rv;
}
if (!strncmp(aLocation, XPCOM_RELCOMPONENT_PREFIX, 4)) {
if (!mComponentsDir)
return NS_ERROR_NOT_INITIALIZED;
nsILocalFile* file = nsnull;
rv = mComponentsDir->Clone((nsIFile**)&file);
if (NS_FAILED(rv)) return rv;
rv = file->AppendRelativeNativePath(nsDependentCString(aLocation + 4));
*aSpec = file;
return rv;
}
if (!strncmp(aLocation, XPCOM_GRECOMPONENT_PREFIX, 4)) {
if (!mGREComponentsDir)
return NS_ERROR_NOT_INITIALIZED;
nsILocalFile* file = nsnull;
rv = mGREComponentsDir->Clone((nsIFile**)&file);
if (NS_FAILED(rv)) return rv;
rv = file->AppendRelativeNativePath(nsDependentCString(aLocation + 4));
*aSpec = file;
return rv;
}
*aSpec = nsnull;
return NS_ERROR_INVALID_ARG;
}
/**
* RegisterFactory()
*
* Register a factory to be responsible for creation of implementation of
* classID aClass. Plus creates as association of aClassName and aContractID
* to the classID. If replace is PR_TRUE, we replace any existing registrations
* with this one.
*
* Once registration is complete, we add the class to the factories cache
* that we maintain. The factories cache is the ONLY place where these
* registrations are ever kept.
*
* The other RegisterFunctions create a loader mapping and persistent
* location, but we just slam it into the cache here. And we don't call the
* loader's OnRegister function, either.
*/
nsresult
nsComponentManagerImpl::RegisterFactory(const nsCID &aClass,
const char *aClassName,
const char *aContractID,
nsIFactory *aFactory,
PRBool aReplace)
{
nsAutoMonitor mon(mMon);
#ifdef PR_LOGGING
if (PR_LOG_TEST(nsComponentManagerLog, PR_LOG_WARNING))
{
char *buf = aClass.ToString();
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("nsComponentManager: RegisterFactory(%s, %s)", buf,
(aContractID ? aContractID : "(null)")));
if (buf)
PR_Free(buf);
}
#endif
nsFactoryEntry *entry = nsnull;
nsFactoryTableEntry* factoryTableEntry = NS_STATIC_CAST(nsFactoryTableEntry*,
PL_DHashTableOperate(&mFactories,
&aClass,
PL_DHASH_ADD));
if (!factoryTableEntry)
return NS_ERROR_OUT_OF_MEMORY;
if (PL_DHASH_ENTRY_IS_BUSY(factoryTableEntry)) {
entry = factoryTableEntry->mFactoryEntry;
}
if (entry && !aReplace)
{
// Already registered
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("\t\tFactory already registered."));
return NS_ERROR_FACTORY_EXISTS;
}
void *mem;
PL_ARENA_ALLOCATE(mem, &mArena, sizeof(nsFactoryEntry));
if (!mem)
return NS_ERROR_OUT_OF_MEMORY;
entry = new (mem) nsFactoryEntry(aClass, aFactory, entry);
factoryTableEntry->mFactoryEntry = entry;
// Update the ContractID->CLSID Map
if (aContractID) {
nsresult rv = HashContractID(aContractID, strlen(aContractID), entry);
if (NS_FAILED(rv)) {
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("\t\tFactory register succeeded. "
"Hashing contractid (%s) FAILED.", aContractID));
return rv;
}
}
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("\t\tFactory register succeeded contractid=%s.",
aContractID ? aContractID : "<none>"));
return NS_OK;
}
nsresult
nsComponentManagerImpl::RegisterComponent(const nsCID &aClass,
const char *aClassName,
const char *aContractID,
const char *aPersistentDescriptor,
PRBool aReplace,
PRBool aPersist)
{
return RegisterComponentCommon(aClass, aClassName,
aContractID,
aContractID ? strlen(aContractID) : 0,
aPersistentDescriptor,
aPersistentDescriptor ?
strlen(aPersistentDescriptor) : 0,
aReplace, aPersist,
nativeComponentType);
}
nsresult
nsComponentManagerImpl::RegisterComponentWithType(const nsCID &aClass,
const char *aClassName,
const char *aContractID,
nsIFile *aSpec,
const char *aLocation,
PRBool aReplace,
PRBool aPersist,
const char *aType)
{
return RegisterComponentCommon(aClass, aClassName,
aContractID,
aContractID ? strlen(aContractID) : 0,
aLocation,
aLocation ? strlen(aLocation) : 0,
aReplace, aPersist,
aType);
}
/*
* Register a component, using whatever they stuck in the nsIFile.
*/
nsresult
nsComponentManagerImpl::RegisterComponentSpec(const nsCID &aClass,
const char *aClassName,
const char *aContractID,
nsIFile *aLibrarySpec,
PRBool aReplace,
PRBool aPersist)
{
nsXPIDLCString registryName;
nsresult rv = RegistryLocationForSpec(aLibrarySpec, getter_Copies(registryName));
if (NS_FAILED(rv))
return rv;
rv = RegisterComponentWithType(aClass, aClassName,
aContractID,
aLibrarySpec,
registryName,
aReplace, aPersist,
nativeComponentType);
return rv;
}
nsresult
nsComponentManagerImpl::RegisterComponentLib(const nsCID &aClass,
const char *aClassName,
const char *aContractID,
const char *aDllName,
PRBool aReplace,
PRBool aPersist)
{
// deprecated and obsolete.
return NS_ERROR_NOT_IMPLEMENTED;
}
/*
* Add a component to the known universe of components.
* Once we enter this function, we own aRegistryName, and must free it
* or hand it to nsFactoryEntry. Common exit point ``out'' helps keep us
* sane.
*/
nsresult
nsComponentManagerImpl::RegisterComponentCommon(const nsCID &aClass,
const char *aClassName,
const char *aContractID,
PRUint32 aContractIDLen,
const char *aRegistryName,
PRUint32 aRegistryNameLen,
PRBool aReplace,
PRBool aPersist,
const char *aType)
{
nsIDKey key(aClass);
nsAutoMonitor mon(mMon);
nsFactoryEntry *entry = GetFactoryEntry(aClass);
// Normalize proid and classname
const char *contractID = (aContractID && *aContractID) ? aContractID : nsnull;
#ifdef PR_LOGGING
if (PR_LOG_TEST(nsComponentManagerLog, PR_LOG_WARNING))
{
char *buf = aClass.ToString();
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("nsComponentManager: RegisterComponentCommon(%s, %s, %s, %s)",
buf,
contractID ? contractID : "(null)",
aRegistryName, aType));
if (buf)
PR_Free(buf);
}
#endif
if (entry && !aReplace) {
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("\t\tFactory already registered."));
return NS_ERROR_FACTORY_EXISTS;
}
int typeIndex = GetLoaderType(aType);
nsCOMPtr<nsIComponentLoader> loader;
nsresult rv = GetLoaderForType(typeIndex, getter_AddRefs(loader));
if (NS_FAILED(rv)) {
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("\t\tgetting loader for %s FAILED\n", aType));
return rv;
}
if (entry) {
entry->ReInit(aClass, aRegistryName, typeIndex);
}
else {
// Arena allocate the nsFactoryEntry
void *mem;
PL_ARENA_ALLOCATE(mem, &mArena, sizeof(nsFactoryEntry));
if (!mem)
return NS_ERROR_OUT_OF_MEMORY;
mRegistryDirty = PR_TRUE;
entry = new (mem) nsFactoryEntry(aClass,
aRegistryName, aRegistryNameLen,
typeIndex);
if (!entry->mLocation)
return NS_ERROR_OUT_OF_MEMORY;
nsFactoryTableEntry* factoryTableEntry =
NS_STATIC_CAST(nsFactoryTableEntry*,
PL_DHashTableOperate(&mFactories, &aClass,
PL_DHASH_ADD));
if (!factoryTableEntry)
return NS_ERROR_OUT_OF_MEMORY;
factoryTableEntry->mFactoryEntry = entry;
}
// Update the ContractID->CLSID Map
if (contractID) {
rv = HashContractID(contractID, aContractIDLen, entry);
if (NS_FAILED(rv)) {
PR_LOG(nsComponentManagerLog, PR_LOG_ERROR,
("\t\tHashContractID(%s) FAILED\n", contractID));
return rv;
}
}
return rv;
}
nsresult
nsComponentManagerImpl::GetLoaderForType(int aType,
nsIComponentLoader **aLoader)
{
nsresult rv;
// Make sure we have a valid type
if (aType < 0 || aType >= mNLoaderData)
return NS_ERROR_INVALID_ARG;
*aLoader = mLoaderData[aType].loader;
if (*aLoader) {
NS_ADDREF(*aLoader);
return NS_OK;
}
nsCOMPtr<nsIComponentLoader> loader;
loader = do_GetServiceFromCategory("component-loader", mLoaderData[aType].type, &rv);
if (NS_FAILED(rv))
return rv;
rv = loader->Init(this, nsnull);
if (NS_SUCCEEDED(rv)) {
mLoaderData[aType].loader = loader;
NS_ADDREF(mLoaderData[aType].loader);
*aLoader = loader;
NS_ADDREF(*aLoader);
}
return rv;
}
// Convert a loader type string into an index into the component data
// array. Empty loader types are converted to NATIVE. Returns -1 if
// loader type cannot be determined.
int
nsComponentManagerImpl::GetLoaderType(const char *typeStr)
{
if (!typeStr || !*typeStr) {
// Empty type strings are NATIVE
return NS_COMPONENT_TYPE_NATIVE;
}
for (int i=NS_COMPONENT_TYPE_NATIVE; i<mNLoaderData; i++) {
if (!strcmp(typeStr, mLoaderData[i].type))
return i;
}
// Not found
return NS_COMPONENT_TYPE_FACTORY_ONLY;
}
// Add a loader type if not already known. Out the typeIndex
// if the loader type is either added or already there.
nsresult
nsComponentManagerImpl::AddLoaderType(const char *typeStr, int *aTypeIndex)
{
int typeIndex = GetLoaderType(typeStr);
if (typeIndex >= 0) {
*aTypeIndex = typeIndex;
return NS_OK;
}
// Add the loader type
if (mNLoaderData >= mMaxNLoaderData) {
NS_ASSERTION(mNLoaderData == mMaxNLoaderData,
"Memory corruption. nsComponentManagerImpl::mLoaderData array overrun.");
// Need to increase our loader array
nsLoaderdata *new_mLoaderData = (nsLoaderdata *) PR_Realloc(mLoaderData, (mMaxNLoaderData + NS_LOADER_DATA_ALLOC_STEP) * sizeof(nsLoaderdata));
if (!new_mLoaderData)
return NS_ERROR_OUT_OF_MEMORY;
mLoaderData = new_mLoaderData;
mMaxNLoaderData += NS_LOADER_DATA_ALLOC_STEP;
}
typeIndex = mNLoaderData;
mLoaderData[typeIndex].type = PL_strdup(typeStr);
if (!mLoaderData[typeIndex].type) {
// mmh! no memory. return failure.
return NS_ERROR_OUT_OF_MEMORY;
}
mLoaderData[typeIndex].loader = nsnull;
mNLoaderData++;
*aTypeIndex = typeIndex;
return NS_OK;
}
typedef struct
{
const nsCID* cid;
const char* regName;
nsIFactory* factory;
} UnregisterConditions;
static PLDHashOperator PR_CALLBACK
DeleteFoundCIDs(PLDHashTable *aTable,
PLDHashEntryHdr *aHdr,
PRUint32 aNumber,
void *aData)
{
nsContractIDTableEntry* entry = NS_STATIC_CAST(nsContractIDTableEntry*, aHdr);
if (!entry->mFactoryEntry)
return PL_DHASH_NEXT;
UnregisterConditions* data = (UnregisterConditions*)aData;
nsFactoryEntry* factoryEntry = entry->mFactoryEntry;
if (data->cid->Equals(factoryEntry->mCid) &&
((data->regName && !PL_strcasecmp(factoryEntry->mLocation, data->regName)) ||
(data->factory && data->factory == factoryEntry->mFactory.get())))
return PL_DHASH_REMOVE;
return PL_DHASH_NEXT;
}
void
nsComponentManagerImpl::DeleteContractIDEntriesByCID(const nsCID* aClass, const char*registryName)
{
UnregisterConditions aData;
aData.cid = aClass;
aData.regName = registryName;
aData.factory = nsnull;
PL_DHashTableEnumerate(&mContractIDs, DeleteFoundCIDs, (void*)&aData);
}
void
nsComponentManagerImpl::DeleteContractIDEntriesByCID(const nsCID* aClass, nsIFactory* factory)
{
UnregisterConditions aData;
aData.cid = aClass;
aData.regName = nsnull;
aData.factory = factory;
PL_DHashTableEnumerate(&mContractIDs, DeleteFoundCIDs, (void*)&aData);
}
nsresult
nsComponentManagerImpl::UnregisterFactory(const nsCID &aClass,
nsIFactory *aFactory)
{
#ifdef PR_LOGGING
if (PR_LOG_TEST(nsComponentManagerLog, PR_LOG_WARNING))
{
char *buf = aClass.ToString();
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("nsComponentManager: UnregisterFactory(%s)", buf));
if (buf)
PR_Free(buf);
}
#endif
nsFactoryEntry *old;
// first delete all contract id entries that are registered with this cid.
DeleteContractIDEntriesByCID(&aClass, aFactory);
// next check to see if there is a CID registered
nsresult rv = NS_ERROR_FACTORY_NOT_REGISTERED;
old = GetFactoryEntry(aClass);
if (old && (old->mFactory.get() == aFactory))
{
nsAutoMonitor mon(mMon);
PL_DHashTableOperate(&mFactories, &aClass, PL_DHASH_REMOVE);
rv = NS_OK;
}
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("\t\tUnregisterFactory() %s",
NS_SUCCEEDED(rv) ? "succeeded" : "FAILED"));
return rv;
}
nsresult
nsComponentManagerImpl::UnregisterComponent(const nsCID &aClass,
const char *registryName)
{
#ifdef PR_LOGGING
if (PR_LOG_TEST(nsComponentManagerLog, PR_LOG_WARNING))
{
char *buf = aClass.ToString();
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("nsComponentManager: UnregisterComponent(%s)", buf));
if (buf)
PR_Free(buf);
}
#endif
NS_ENSURE_ARG_POINTER(registryName);
nsFactoryEntry *old;
// first delete all contract id entries that are registered with this cid.
DeleteContractIDEntriesByCID(&aClass, registryName);
// next check to see if there is a CID registered
old = GetFactoryEntry(aClass);
if (old && old->mLocation && !PL_strcasecmp(old->mLocation, registryName))
{
nsAutoMonitor mon(mMon);
PL_DHashTableOperate(&mFactories, &aClass, PL_DHASH_REMOVE);
}
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("nsComponentManager: Factory unregister(%s) succeeded.", registryName));
return NS_OK;
}
nsresult
nsComponentManagerImpl::UnregisterComponentSpec(const nsCID &aClass,
nsIFile *aLibrarySpec)
{
nsXPIDLCString registryName;
nsresult rv = RegistryLocationForSpec(aLibrarySpec, getter_Copies(registryName));
if (NS_FAILED(rv)) return rv;
return UnregisterComponent(aClass, registryName);
}
// XXX Need to pass in aWhen and servicemanager
nsresult
nsComponentManagerImpl::FreeLibraries(void)
{
return UnloadLibraries(NS_STATIC_CAST(nsIServiceManager*, this), NS_Timer); // XXX when
}
// Private implementation of unloading libraries
nsresult
nsComponentManagerImpl::UnloadLibraries(nsIServiceManager *serviceMgr, PRInt32 aWhen)
{
nsresult rv = NS_OK;
nsAutoMonitor mon(mMon);
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("nsComponentManager: Unloading Libraries."));
// UnloadAll the loaders
// iterate over all known loaders and ask them to Unload.
// Skip mNativeComponentLoader
for (int i=NS_COMPONENT_TYPE_NATIVE + 1; i<mNLoaderData; i++) {
if (mLoaderData[i].loader) {
rv = mLoaderData[i].loader->UnloadAll(aWhen);
if (NS_FAILED(rv))
break;
}
}
// UnloadAll the native loader
rv = mNativeComponentLoader->UnloadAll(aWhen);
return rv;
}
////////////////////////////////////////////////////////////////////////////////
/**
* AutoRegister(RegistrationInstant, const char *directory)
*
* Given a directory in the following format, this will ensure proper registration
* of all components. No default directory is looked at.
*
* Directory and fullname are what NSPR will accept. For eg.
* WIN y:/home/dp/mozilla/dist/bin
* UNIX /home/dp/mozilla/dist/bin
* MAC /Hard drive/mozilla/dist/apprunner
*
* This will take care not loading already registered dlls, finding and
* registering new dlls, re-registration of modified dlls
*
*/
nsresult
nsComponentManagerImpl::AutoRegister(PRInt32 when, nsIFile *inDirSpec)
{
return AutoRegisterImpl(when, inDirSpec);
}
nsresult
nsComponentManagerImpl::AutoRegisterImpl(PRInt32 when,
nsIFile *inDirSpec,
PRBool fileIsCompDir)
{
nsCOMPtr<nsIFile> dir;
nsresult rv;
#ifdef DEBUG
// testing release behaviour
if (getenv("XPCOM_NO_AUTOREG"))
return NS_OK;
#endif
if (inDirSpec)
{
// Use supplied components' directory
dir = inDirSpec;
}
else
{
mComponentsDir->Clone(getter_AddRefs(dir));
if (!dir)
return NS_ERROR_NOT_INITIALIZED;
}
nsCOMPtr<nsIInterfaceInfoManager> iim =
dont_AddRef(XPTI_GetInterfaceInfoManager());
if (!iim)
return NS_ERROR_UNEXPECTED;
// Notify observers of xpcom autoregistration start
NS_CreateServicesFromCategory(NS_XPCOM_AUTOREGISTRATION_OBSERVER_ID,
nsnull,
"start");
/* do the native loader first, so we can find other loaders */
rv = mNativeComponentLoader->AutoRegisterComponents((PRInt32)when, dir);
if (NS_FAILED(rv)) return rv;
#ifdef ENABLE_STATIC_COMPONENT_LOADER
rv = mStaticComponentLoader->AutoRegisterComponents((PRInt32)when, inDirSpec);
if (NS_FAILED(rv)) return rv;
#endif
/* do InterfaceInfoManager after native loader so it can use components. */
rv = iim->AutoRegisterInterfaces();
if (NS_FAILED(rv)) return rv;
if (!mCategoryManager) {
NS_WARNING("mCategoryManager is null");
return NS_ERROR_UNEXPECTED;
}
nsCOMPtr<nsISimpleEnumerator> loaderEnum;
rv = mCategoryManager->EnumerateCategory("component-loader",
getter_AddRefs(loaderEnum));
if (NS_FAILED(rv)) return rv;
PRBool hasMore;
while (NS_SUCCEEDED(loaderEnum->HasMoreElements(&hasMore)) && hasMore) {
nsCOMPtr<nsISupports> supports;
if (NS_FAILED(loaderEnum->GetNext(getter_AddRefs(supports))))
continue;
nsCOMPtr<nsISupportsCString> supStr = do_QueryInterface(supports);
if (!supStr)
continue;
nsCAutoString loaderType;
if (NS_FAILED(supStr->GetData(loaderType)))
continue;
// We depend on the loader being created. Add the loader type and
// create the loader object too.
nsCOMPtr<nsIComponentLoader> loader;
int typeIndex;
rv = AddLoaderType(loaderType.get(), &typeIndex);
if (NS_FAILED(rv))
return rv;
GetLoaderForType(typeIndex, getter_AddRefs(loader));
}
rv = AutoRegisterNonNativeComponents(dir.get());
// Notify observers of xpcom autoregistration completion
NS_CreateServicesFromCategory(NS_XPCOM_AUTOREGISTRATION_OBSERVER_ID,
nsnull,
"end");
if (mRegistryDirty)
FlushPersistentStore(PR_TRUE);
return rv;
}
nsresult
nsComponentManagerImpl::AutoRegisterNonNativeComponents(nsIFile* spec)
{
nsresult rv = NS_OK;
nsCOMPtr<nsIFile> directory = spec;
if (!directory) {
mComponentsDir->Clone(getter_AddRefs(directory));
if (!directory)
return NS_ERROR_NOT_INITIALIZED;
}
for (int i = 1; i < mNLoaderData; i++) {
if (!mLoaderData[i].loader) {
rv = GetLoaderForType(i, &mLoaderData[i].loader);
if (NS_FAILED(rv))
continue;
}
rv = mLoaderData[i].loader->AutoRegisterComponents(0, directory);
if (NS_FAILED(rv))
break;
}
if (NS_SUCCEEDED(rv))
{
PRBool registered;
do {
registered = PR_FALSE;
for (int i = 0; i < mNLoaderData; i++) {
PRBool b = PR_FALSE;
if (mLoaderData[i].loader) {
rv = mLoaderData[i].loader->RegisterDeferredComponents(0, &b);
if (NS_FAILED(rv))
continue;
registered |= b;
}
}
} while (NS_SUCCEEDED(rv) && registered);
}
return rv;
}
nsresult
nsComponentManagerImpl::AutoRegisterComponent(PRInt32 when,
nsIFile *component)
{
nsresult rv = NS_OK, res = NS_ERROR_FACTORY_NOT_REGISTERED;
/*
* Do we have to give the native loader first crack at it?
* I vote ``no''.
*/
for (int i = 0; i < mNLoaderData; i++) {
PRBool didRegister;
if (!mLoaderData[i].loader) {
nsCOMPtr<nsIComponentLoader> loader;
rv = GetLoaderForType(i, getter_AddRefs(loader));
if (NS_FAILED(rv))
continue;
// |GetLoaderForType| has filled in |mLoaderData[i].loader|:
NS_ASSERTION(loader == mLoaderData[i].loader, "oops");
}
rv = mLoaderData[i].loader->AutoRegisterComponent((int)when, component, &didRegister);
if (NS_FAILED(rv)) {
res = rv;
} else if (didRegister) {
return rv;
}
}
return res;
}
nsresult
nsComponentManagerImpl::AutoUnregisterComponent(PRInt32 when,
nsIFile *component)
{
nsresult rv = NS_OK;
for (int i = 0; i < mNLoaderData; i++) {
PRBool didUnRegister;
if (!mLoaderData[i].loader) {
rv = GetLoaderForType(i, &mLoaderData[i].loader);
if (NS_FAILED(rv))
continue;
}
rv = mLoaderData[i].loader->AutoUnregisterComponent(when, component, &didUnRegister);
if (NS_SUCCEEDED(rv) && didUnRegister) {
// we need to remove this file from our list of known libraries.
RemoveFileInfo(component, nsnull);
mRegistryDirty = PR_TRUE;
break;
}
}
return NS_FAILED(rv) ? NS_ERROR_FACTORY_NOT_REGISTERED : NS_OK;
}
nsresult
nsComponentManagerImpl::IsRegistered(const nsCID &aClass,
PRBool *aRegistered)
{
if (!aRegistered)
{
NS_ASSERTION(0, "null ptr");
return NS_ERROR_NULL_POINTER;
}
*aRegistered = (nsnull != GetFactoryEntry(aClass));
return NS_OK;
}
nsresult
nsComponentManagerImpl::EnumerateCLSIDs(nsIEnumerator** aEnumerator)
{
NS_ASSERTION(aEnumerator != nsnull, "null ptr");
if (!aEnumerator)
{
return NS_ERROR_NULL_POINTER;
}
*aEnumerator = nsnull;
nsresult rv;
PLDHashTableEnumeratorImpl *aEnum;
rv = PL_NewDHashTableEnumerator(&mFactories,
ConvertFactoryEntryToCID,
(void*)this,
&aEnum);
if (NS_FAILED(rv))
return rv;
*aEnumerator = NS_STATIC_CAST(nsIEnumerator*, aEnum);
return NS_OK;
}
nsresult
nsComponentManagerImpl::EnumerateContractIDs(nsIEnumerator** aEnumerator)
{
NS_ASSERTION(aEnumerator != nsnull, "null ptr");
if (!aEnumerator)
{
return NS_ERROR_NULL_POINTER;
}
*aEnumerator = nsnull;
nsresult rv;
PLDHashTableEnumeratorImpl *aEnum;
rv = PL_NewDHashTableEnumerator(&mContractIDs,
ConvertContractIDKeyToString,
(void*)this,
&aEnum);
if (NS_FAILED(rv))
return rv;
*aEnumerator = NS_STATIC_CAST(nsIEnumerator*, aEnum);
return NS_OK;
}
// nsIComponentRegistrar
NS_IMETHODIMP
nsComponentManagerImpl::AutoRegister(nsIFile *aSpec)
{
if (aSpec == nsnull)
return AutoRegisterImpl(0, aSpec);
PRBool directory;
aSpec->IsDirectory(&directory);
if (directory)
return AutoRegisterImpl(0, aSpec, PR_FALSE);
return AutoRegisterComponent(0, aSpec);
}
NS_IMETHODIMP
nsComponentManagerImpl::AutoUnregister(nsIFile *aSpec)
{
// unregistering a complete directory is not implmeneted yet...FIX
if (aSpec == nsnull)
return NS_ERROR_NOT_IMPLEMENTED;
PRBool directory;
aSpec->IsDirectory(&directory);
if (directory)
return NS_ERROR_NOT_IMPLEMENTED;
return AutoUnregisterComponent(0, aSpec);
}
NS_IMETHODIMP
nsComponentManagerImpl::RegisterFactory(const nsCID & aClass,
const char *aClassName,
const char *aContractID,
nsIFactory *aFactory)
{
return RegisterFactory(aClass,
aClassName,
aContractID,
aFactory,
PR_TRUE);
}
NS_IMETHODIMP
nsComponentManagerImpl::RegisterFactoryLocation(const nsCID & aClass,
const char *aClassName,
const char *aContractID,
nsIFile *aFile,
const char *loaderStr,
const char *aType)
{
nsXPIDLCString registryName;
if (!loaderStr)
{
nsresult rv = RegistryLocationForSpec(aFile, getter_Copies(registryName));
if (NS_FAILED(rv))
return rv;
}
nsresult rv;
rv = RegisterComponentWithType(aClass,
aClassName,
aContractID,
aFile,
(loaderStr ? loaderStr : registryName.get()),
PR_TRUE,
PR_TRUE,
(aType ? aType : nativeComponentType));
return rv;
}
NS_IMETHODIMP
nsComponentManagerImpl::UnregisterFactoryLocation(const nsCID & aClass,
nsIFile *aFile)
{
return UnregisterComponentSpec(aClass, aFile);
}
NS_IMETHODIMP
nsComponentManagerImpl::IsCIDRegistered(const nsCID & aClass,
PRBool *_retval)
{
return IsRegistered(aClass, _retval);
}
NS_IMETHODIMP
nsComponentManagerImpl::IsContractIDRegistered(const char *aClass,
PRBool *_retval)
{
nsFactoryEntry *entry = GetFactoryEntry(aClass, strlen(aClass));
if (entry)
*_retval = PR_TRUE;
else
*_retval = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::EnumerateCIDs(nsISimpleEnumerator **aEnumerator)
{
NS_ASSERTION(aEnumerator != nsnull, "null ptr");
if (!aEnumerator)
return NS_ERROR_NULL_POINTER;
*aEnumerator = nsnull;
nsresult rv;
PLDHashTableEnumeratorImpl *aEnum;
rv = PL_NewDHashTableEnumerator(&mFactories,
ConvertFactoryEntryToCID,
(void*)this,
&aEnum);
if (NS_FAILED(rv))
return rv;
*aEnumerator = NS_STATIC_CAST(nsISimpleEnumerator*, aEnum);
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::EnumerateContractIDs(nsISimpleEnumerator **aEnumerator)
{
NS_ASSERTION(aEnumerator != nsnull, "null ptr");
if (!aEnumerator)
return NS_ERROR_NULL_POINTER;
*aEnumerator = nsnull;
nsresult rv;
PLDHashTableEnumeratorImpl *aEnum;
rv = PL_NewDHashTableEnumerator(&mContractIDs,
ConvertContractIDKeyToString,
(void*)this,
&aEnum);
if (NS_FAILED(rv))
return rv;
*aEnumerator = NS_STATIC_CAST(nsISimpleEnumerator*, aEnum);
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::CIDToContractID(const nsCID & aClass,
char **_retval)
{
return CLSIDToContractID(aClass,
nsnull,
_retval);
}
NS_IMETHODIMP
nsComponentManagerImpl::ContractIDToCID(const char *aContractID,
nsCID * *_retval)
{
*_retval = (nsCID*) nsMemory::Alloc(sizeof(nsCID));
if (!*_retval)
return NS_ERROR_OUT_OF_MEMORY;
nsresult rv = ContractIDToClassID(aContractID, *_retval);
if (NS_FAILED(rv)) {
nsMemory::Free(*_retval);
*_retval = nsnull;
}
return rv;
}
// end nsIComponentRegistrar
NS_IMETHODIMP
nsComponentManagerImpl::HasFileChanged(nsIFile *file, const char *loaderString, PRInt64 modDate, PRBool *_retval)
{
*_retval = PR_TRUE;
nsXPIDLCString registryName;
nsresult rv = RegistryLocationForSpec(file, getter_Copies(registryName));
if (NS_FAILED(rv))
return rv;
nsCStringKey key(registryName);
AutoRegEntry* entry = (AutoRegEntry*)mAutoRegEntries.Get(&key);
if (entry)
*_retval = entry->Modified(&modDate);
else
*_retval = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::SaveFileInfo(nsIFile *file, const char *loaderString, PRInt64 modDate)
{
mRegistryDirty = PR_TRUE;
nsXPIDLCString registryName;
nsresult rv = RegistryLocationForSpec(file, getter_Copies(registryName));
if (NS_FAILED(rv))
return rv;
// check to see if exists in the array before adding it so that we don't have dups.
nsCStringKey key(registryName);
AutoRegEntry* entry = (AutoRegEntry*)mAutoRegEntries.Get(&key);
if (entry)
{
entry->SetDate(&modDate);
return NS_OK;
}
entry = new AutoRegEntry(registryName, &modDate);
if (!entry)
return NS_ERROR_OUT_OF_MEMORY;
mAutoRegEntries.Put(&key, entry);
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::RemoveFileInfo(nsIFile *file, const char *loaderString)
{
mRegistryDirty = PR_TRUE;
nsXPIDLCString registryName;
nsresult rv = RegistryLocationForSpec(file, getter_Copies(registryName));
if (NS_FAILED(rv))
return rv;
nsCStringKey key(registryName);
AutoRegEntry* entry = (AutoRegEntry*)mAutoRegEntries.Remove(&key);
if (entry)
delete entry;
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::GetOptionalData(nsIFile *file,
const char *loaderString,
char **_retval)
{
nsXPIDLCString registryName;
nsresult rv = RegistryLocationForSpec(file, getter_Copies(registryName));
if (NS_FAILED(rv))
return rv;
nsCStringKey key(registryName);
AutoRegEntry* entry = (AutoRegEntry*)mAutoRegEntries.Get(&key);
if (!entry) {
return NS_ERROR_NOT_INITIALIZED;
}
const char* opData = entry->GetOptionalData();
if (opData)
*_retval = ToNewCString(nsDependentCString(opData));
else
*_retval = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::SetOptionalData(nsIFile *file,
const char *loaderString,
const char *data)
{
nsXPIDLCString registryName;
nsresult rv = RegistryLocationForSpec(file, getter_Copies(registryName));
if (NS_FAILED(rv))
return rv;
nsCStringKey key(registryName);
AutoRegEntry* entry = (AutoRegEntry*)mAutoRegEntries.Get(&key);
if (!entry) {
PRInt64 zero = LL_Zero();
entry = new AutoRegEntry(registryName, &zero);
if (!entry)
return NS_ERROR_OUT_OF_MEMORY;
mAutoRegEntries.Put(&key, entry);
}
entry->SetOptionalData(data);
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::FlushPersistentStore(PRBool now)
{
mRegistryDirty = PR_TRUE;
if (now)
return WritePersistentRegistry();
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////
// Static Access Functions
////////////////////////////////////////////////////////////////////////////////
NS_COM nsresult
NS_GetComponentManager(nsIComponentManager* *result)
{
if (nsComponentManagerImpl::gComponentManager == nsnull)
{
// XPCOM needs initialization.
nsresult rv = NS_InitXPCOM2(nsnull, nsnull, nsnull);
if (NS_FAILED(rv))
return rv;
}
*result = NS_STATIC_CAST(nsIComponentManager*,
nsComponentManagerImpl::gComponentManager);
NS_IF_ADDREF(*result);
return NS_OK;
}
NS_COM nsresult
NS_GetServiceManager(nsIServiceManager* *result)
{
nsresult rv = NS_OK;
if (nsComponentManagerImpl::gComponentManager == nsnull)
{
// XPCOM needs initialization.
rv = NS_InitXPCOM2(nsnull, nsnull, nsnull);
}
if (NS_FAILED(rv))
return rv;
*result = NS_STATIC_CAST(nsIServiceManager*,
nsComponentManagerImpl::gComponentManager);
NS_IF_ADDREF(*result);
return NS_OK;
}
NS_COM nsresult
NS_GetComponentRegistrar(nsIComponentRegistrar* *result)
{
nsresult rv = NS_OK;
if (nsComponentManagerImpl::gComponentManager == nsnull)
{
// XPCOM needs initialization.
rv = NS_InitXPCOM2(nsnull, nsnull, nsnull);
}
if (NS_FAILED(rv))
return rv;
*result = NS_STATIC_CAST(nsIComponentRegistrar*,
nsComponentManagerImpl::gComponentManager);
NS_IF_ADDREF(*result);
return NS_OK;
}
// nsIComponentLoaderManager is not frozen, but is defined here
// so that I can use it internally in xpcom.
nsresult
NS_GetComponentLoaderManager(nsIComponentLoaderManager* *result)
{
nsresult rv = NS_OK;
if (nsComponentManagerImpl::gComponentManager == NULL)
{
// XPCOM needs initialization.
rv = NS_InitXPCOM2(nsnull, nsnull, nsnull);
}
if (NS_FAILED(rv))
return rv;
*result = NS_STATIC_CAST(nsIComponentLoaderManager*,
nsComponentManagerImpl::gComponentManager);
NS_IF_ADDREF(*result);
return NS_OK;
}
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