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gecko-dev/xpcom/components/nsComponentManager.cpp

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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 "nsIEnumerator.h"
#include "xptiprivate.h"
#include "nsIConsoleService.h"
#include "nsIModule.h"
#include "nsIObserverService.h"
#include "nsISimpleEnumerator.h"
#include "nsIStringEnumerator.h"
#include "nsXPCOM.h"
#include "nsXPCOMPrivate.h"
#include "nsISupportsPrimitives.h"
#include "nsIClassInfo.h"
#include "nsLocalFile.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 "nsThreadUtils.h"
#include "prthread.h"
#include "private/pprthred.h"
#include "nsTArray.h"
#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
#endif
// 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 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
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 static_cast<char *>(mem);
}
char*
ArenaStrdup(const char *s, PLArenaPool *arena)
{
return ArenaStrndup(s, strlen(s), arena);
}
////////////////////////////////////////////////////////////////////////////////
// Hashtable Callbacks
////////////////////////////////////////////////////////////////////////////////
PRBool
nsFactoryEntry_Destroy(nsHashKey *aKey, void *aData, void* closure);
static PLDHashNumber
factory_HashKey(PLDHashTable *aTable, const void *aKey)
{
const nsCID *cidp = reinterpret_cast<const nsCID*>(aKey);
return cidp->m0;
}
static PRBool
factory_MatchEntry(PLDHashTable *aTable, const PLDHashEntryHdr *aHdr,
const void *aKey)
{
const nsFactoryTableEntry* entry =
static_cast<const nsFactoryTableEntry*>(aHdr);
const nsCID *cidp = reinterpret_cast<const nsCID*>(aKey);
return (entry->mFactoryEntry->mCid).Equals(*cidp);
}
static void
factory_ClearEntry(PLDHashTable *aTable, PLDHashEntryHdr *aHdr)
{
nsFactoryTableEntry* entry = static_cast<nsFactoryTableEntry*>(aHdr);
// nsFactoryEntry is arena allocated. So we don't 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_HashKey,
factory_MatchEntry,
PL_DHashMoveEntryStub,
factory_ClearEntry,
PL_DHashFinalizeStub,
};
static void
contractID_ClearEntry(PLDHashTable *aTable, PLDHashEntryHdr *aHdr)
{
nsContractIDTableEntry* entry = static_cast<nsContractIDTableEntry*>(aHdr);
if (entry->mFactoryEntry->mLoaderType == NS_LOADER_TYPE_INVALID &&
entry->mFactoryEntry->mCid.Equals(kEmptyCID)) {
// this object is owned by the hash.
// nsFactoryEntry is arena allocated. So we don't 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_DHashStringKey,
PL_DHashMatchStringKey,
PL_DHashMoveEntryStub,
contractID_ClearEntry,
PL_DHashFinalizeStub,
};
////////////////////////////////////////////////////////////////////////////////
// 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();
void ReleaseElements();
nsTArray<nsISupports*> mElements;
PRInt32 mCount, mCurrent;
PRMonitor* mMonitor;
struct Closure {
PRBool succeeded;
EnumeratorConverter converter;
void *data;
PLDHashTableEnumeratorImpl *impl;
};
static PLDHashOperator Enumerator(PLDHashTable *table,
PLDHashEntryHdr *hdr,
PRUint32 number,
void *data);
};
// static
PLDHashOperator
PLDHashTableEnumeratorImpl::Enumerator(PLDHashTable *table,
PLDHashEntryHdr *hdr,
PRUint32 number,
void *data)
{
Closure *c = 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()
{
ReleaseElements();
// Destroy the Lock
if (mMonitor)
nsAutoMonitor::DestroyMonitor(mMonitor);
}
void
PLDHashTableEnumeratorImpl::ReleaseElements()
{
for (PRInt32 i = 0; i < mCount; i++) {
NS_IF_RELEASE(mElements[i]);
}
}
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 = 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 = 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 =
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 = 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 =
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),
mShuttingDown(NS_SHUTDOWN_NEVERHAPPENED),
mLoaderData(4),
mRegistryDirty(PR_FALSE)
{
mFactories.ops = nsnull;
mContractIDs.ops = nsnull;
}
#define CONTRACTID_HASHTABLE_INITIAL_SIZE 2048
#define AUTOREGENTRY_HASHTABLE_INITIAL_SIZE 256
nsresult nsComponentManagerImpl::Init(nsStaticModuleInfo const *aStaticModules,
PRUint32 aStaticModuleCount)
{
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),
CONTRACTID_HASHTABLE_INITIAL_SIZE)) {
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 (!mAutoRegEntries.Init(AUTOREGENTRY_HASHTABLE_INITIAL_SIZE))
return NS_ERROR_OUT_OF_MEMORY;
if (mMon == nsnull) {
mMon = nsAutoMonitor::NewMonitor("nsComponentManagerImpl");
if (mMon == nsnull)
return NS_ERROR_OUT_OF_MEMORY;
}
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."));
rv = mNativeModuleLoader.Init();
if (NS_FAILED(rv))
return rv;
rv = mStaticModuleLoader.Init(aStaticModules, aStaticModuleCount);
if (NS_FAILED(rv))
return rv;
return NS_OK;
}
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."));
// 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 persistent registry."));
#ifdef DEBUG
printf("Could not write out persistent registry!\n");
#endif
}
}
mAutoRegEntries.Clear();
// Release all cached factories
if (mContractIDs.ops) {
PL_DHashTableFinish(&mContractIDs);
mContractIDs.ops = nsnull;
}
if (mFactories.ops) {
PL_DHashTableFinish(&mFactories);
mFactories.ops = nsnull;
}
mLoaderData.Clear();
// Free staticm modules
mStaticModuleLoader.ReleaseModules();
// Unload libraries
mNativeModuleLoader.UnloadLibraries();
// delete arena for strings and small objects
PL_FinishArenaPool(&mArena);
mComponentsDir = 0;
mCategoryManager = 0;
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_ISUPPORTS7(nsComponentManagerImpl,
nsIComponentManager,
nsIServiceManager,
nsISupportsWeakReference,
nsIInterfaceRequestor,
nsIComponentRegistrar,
nsIServiceManagerObsolete,
nsIComponentManagerObsolete)
nsresult
nsComponentManagerImpl::GetInterface(const nsIID & uuid, void **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
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()
{
NS_ASSERTION(mComponentsDir, "nsComponentManager not initialized.");
nsresult rv;
// populate Category Manager. need to get this early so that we don't get
// skipped by 'goto out'
mCategoryManager = do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);
if (NS_FAILED(rv))
return rv;
nsAutoMonitor mon(mMon);
nsManifestLineReader reader;
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]);
nsCOMPtr<nsILocalFile> lf;
rv = FileForRegistryLocation(nsDependentCString(values[0], lengths[0]),
getter_AddRefs(lf));
if (NS_FAILED(rv))
continue;
nsCOMPtr<nsIHashable> lfhash(do_QueryInterface(lf));
if (!lf) {
NS_ERROR("nsLocalFile does not implement nsIHashable");
continue;
}
mAutoRegEntries.Put(lfhash, a);
}
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;
LoaderType loadertype = AddLoaderType(values[2]);
if (loadertype == NS_LOADER_TYPE_INVALID) {
NS_ERROR("Could not create LoaderType");
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, loadertype, values[4]);
if (!entry->mLocationKey) {
rv = NS_ERROR_OUT_OF_MEMORY;
goto out;
}
nsFactoryTableEntry* factoryTableEntry =
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->mLoaderType == NS_LOADER_TYPE_INVALID)
continue; //what should we really do?
nsContractIDTableEntry* contractIDTableEntry =
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;
}
if (ReadSectionHeader(reader, "CATEGORIES"))
goto out;
mCategoryManager->SuppressNotifications(PR_TRUE);
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);
}
mCategoryManager->SuppressNotifications(PR_FALSE);
mRegistryDirty = PR_FALSE;
out:
if (fd)
PR_Close(fd);
if (registry)
delete [] registry;
return rv;
}
struct PersistentWriterArgs
{
PRFileDesc *mFD;
nsTArray<nsLoaderdata> *mLoaderData;
};
static 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->mLoaderType == NS_LOADER_TYPE_INVALID)
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;
}
static PLDHashOperator
ClassIDWriter(PLDHashTable *table,
PLDHashEntryHdr *hdr,
PRUint32 number,
void *arg)
{
nsFactoryEntry *factoryEntry = ((nsFactoryTableEntry*)hdr)->mFactoryEntry;
PRFileDesc* fd = ((PersistentWriterArgs*)arg)->mFD;
nsTArray<nsLoaderdata> *loaderData = ((PersistentWriterArgs*)arg)->mLoaderData;
// for now, we only save out the top most parent.
while (factoryEntry->mParent)
factoryEntry = factoryEntry->mParent;
if (factoryEntry->mLoaderType == NS_LOADER_TYPE_INVALID) {
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;
switch (factoryEntry->mLoaderType) {
case NS_LOADER_TYPE_STATIC:
loaderName = staticComponentType;
break;
case NS_LOADER_TYPE_NATIVE:
loaderName = nativeComponentType;
break;
default:
loaderName = loaderData->ElementAt(factoryEntry->mLoaderType).type.get();
}
const char* location = factoryEntry->mLocationKey;
// 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)
NS_Free(contractID);
if (className)
NS_Free(className);
return PL_DHASH_NEXT;
}
static PLDHashOperator
AutoRegEntryWriter(nsIHashable *aKey, PRInt64 &aTimestamp, void* aClosure)
{
PRFileDesc* fd = (PRFileDesc*) aClosure;
nsCOMPtr<nsILocalFile> lf(do_QueryInterface(aKey));
nsCAutoString location;
nsComponentManagerImpl::gComponentManager->
RegistryLocationForFile(lf, location);
PR_fprintf(fd, "%s,%lld\n", location.get(), (PRInt64) aTimestamp);
return PL_DHASH_NEXT;
}
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;
// Owner and group can setup components, everyone else should be able to see but not poison them.
nsresult rv = localFile->OpenNSPRFileDesc(PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE, 0664, &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;
}
NS_ASSERTION(mCategoryManager, "nsComponentManager used initialized");
rv = mCategoryManager->WriteCategoryManagerToRegistry(fd);
out:
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;
NS_ABORT_IF_FALSE(PR_InMonitor(mMon), "called from outside mMon");
nsContractIDTableEntry* contractIDTableEntry =
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;
}
nsFactoryEntry *
nsComponentManagerImpl::GetFactoryEntry(const char *aContractID,
PRUint32 aContractIDLen)
{
nsFactoryEntry *fe = nsnull;
{
nsAutoMonitor mon(mMon);
nsContractIDTableEntry* contractIDTableEntry =
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 =
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.
*/
NS_IMETHODIMP
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);
}
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);
}
/**
* GetClassObject()
*
* Given a classID, this finds the singleton ClassObject that implements the CID.
* Returns an interface of type aIID off the singleton classobject.
*/
NS_IMETHODIMP
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)
NS_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;
}
NS_IMETHODIMP
nsComponentManagerImpl::GetClassObjectByContractID(const char *contractID,
const nsIID &aIID,
void **aResult)
{
NS_ENSURE_ARG_POINTER(aResult);
NS_ENSURE_ARG_POINTER(contractID);
nsresult rv;
nsCOMPtr<nsIFactory> factory;
#ifdef PR_LOGGING
if (PR_LOG_TEST(nsComponentManagerLog, PR_LOG_DEBUG))
{
PR_LogPrint("nsComponentManager: GetClassObject(%s)", contractID);
}
#endif
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.
*
*/
NS_IMETHODIMP
nsComponentManagerImpl::ContractIDToClassID(const char *aContractID, nsCID *aClass)
{
NS_ENSURE_ARG_POINTER(aContractID);
NS_ENSURE_ARG_POINTER(aClass);
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)
NS_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 aren't caching this.
*/
NS_IMETHODIMP
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)
NS_Free(buf);
}
#endif
return rv;
}
/**
* 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.
*/
NS_IMETHODIMP
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, don't 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);
if (NS_SUCCEEDED(rv))
{
rv = factory->CreateInstance(aDelegate, aIID, aResult);
if (NS_SUCCEEDED(rv) && !*aResult) {
NS_ERROR("Factory did not return an object but returned success!");
rv = NS_ERROR_SERVICE_NOT_FOUND;
}
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)
NS_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.
*/
NS_IMETHODIMP
nsComponentManagerImpl::CreateInstanceByContractID(const char *aContractID,
nsISupports *aDelegate,
const nsIID &aIID,
void **aResult)
{
NS_ENSURE_ARG_POINTER(aContractID);
// 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, don't 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);
if (NS_SUCCEEDED(rv))
{
rv = factory->CreateInstance(aDelegate, aIID, aResult);
if (NS_SUCCEEDED(rv) && !*aResult) {
NS_ERROR("Factory did not return an object but returned success!");
rv = NS_ERROR_SERVICE_NOT_FOUND;
}
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
FreeServiceFactoryEntryEnumerate(PLDHashTable *aTable,
PLDHashEntryHdr *aHdr,
PRUint32 aNumber,
void *aData)
{
nsFactoryTableEntry* entry = static_cast<nsFactoryTableEntry*>(aHdr);
if (!entry->mFactoryEntry)
return PL_DHASH_NEXT;
nsFactoryEntry* factoryEntry = entry->mFactoryEntry;
factoryEntry->mServiceObject = nsnull;
return PL_DHASH_NEXT;
}
static
PLDHashOperator
FreeServiceContractIDEntryEnumerate(PLDHashTable *aTable,
PLDHashEntryHdr *aHdr,
PRUint32 aNumber,
void *aData)
{
nsContractIDTableEntry* entry = 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;
}
// This should only ever be called within the monitor!
nsComponentManagerImpl::PendingServiceInfo*
nsComponentManagerImpl::AddPendingService(const nsCID& aServiceCID,
PRThread* aThread)
{
PendingServiceInfo* newInfo = mPendingServices.AppendElement();
if (newInfo) {
newInfo->cid = &aServiceCID;
newInfo->thread = aThread;
}
return newInfo;
}
// This should only ever be called within the monitor!
void
nsComponentManagerImpl::RemovePendingService(const nsCID& aServiceCID)
{
PRUint32 pendingCount = mPendingServices.Length();
for (PRUint32 index = 0; index < pendingCount; ++index) {
const PendingServiceInfo& info = mPendingServices.ElementAt(index);
if (info.cid->Equals(aServiceCID)) {
mPendingServices.RemoveElementAt(index);
return;
}
}
}
// This should only ever be called within the monitor!
PRThread*
nsComponentManagerImpl::GetPendingServiceThread(const nsCID& aServiceCID) const
{
PRUint32 pendingCount = mPendingServices.Length();
for (PRUint32 index = 0; index < pendingCount; ++index) {
const PendingServiceInfo& info = mPendingServices.ElementAt(index);
if (info.cid->Equals(aServiceCID)) {
return info.thread;
}
}
return nsnull;
}
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, don't 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);
nsFactoryEntry* entry = nsnull;
nsFactoryTableEntry* factoryTableEntry =
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);
}
PRThread* currentPRThread = PR_GetCurrentThread();
NS_ASSERTION(currentPRThread, "This should never be null!");
// Needed to optimize the event loop below.
nsIThread* currentThread = nsnull;
PRThread* pendingPRThread;
while ((pendingPRThread = GetPendingServiceThread(aClass))) {
if (pendingPRThread == currentPRThread) {
NS_ERROR("Recursive GetService!");
return NS_ERROR_NOT_AVAILABLE;
}
mon.Exit();
if (!currentThread) {
currentThread = NS_GetCurrentThread();
NS_ASSERTION(currentThread, "This should never be null!");
}
// This will process a single event or yield the thread if no event is
// pending.
if (!NS_ProcessNextEvent(currentThread, PR_FALSE)) {
PR_Sleep(PR_INTERVAL_NO_WAIT);
}
mon.Enter();
}
if (currentThread) {
// If we have a currentThread then we must have waited on another thread
// to create the service. Grab it now if that succeeded.
if (!entry) {
factoryTableEntry = static_cast<nsFactoryTableEntry*>
(PL_DHashTableOperate(&mFactories, &aClass, PL_DHASH_LOOKUP));
if (PL_DHASH_ENTRY_IS_BUSY(factoryTableEntry)) {
entry = factoryTableEntry->mFactoryEntry;
}
}
// It's still possible that the other thread failed to create the
// service so we're not guaranteed to have an entry or service yet.
if (entry && entry->mServiceObject) {
nsCOMPtr<nsISupports> supports = entry->mServiceObject;
mon.Exit();
return supports->QueryInterface(aIID, result);
}
}
#ifdef DEBUG
PendingServiceInfo* newInfo =
#endif
AddPendingService(aClass, currentPRThread);
NS_ASSERTION(newInfo, "Failed to add info to the array!");
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();
nsresult rv = CreateInstance(aClass, nsnull, aIID, getter_AddRefs(service));
mon.Enter();
#ifdef DEBUG
pendingPRThread = GetPendingServiceThread(aClass);
NS_ASSERTION(pendingPRThread == currentPRThread,
"Pending service array has been changed!");
#endif
RemovePendingService(aClass);
if (NS_FAILED(rv))
return rv;
if (!entry) { // second hash lookup for GetService
nsFactoryTableEntry* factoryTableEntry =
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;
}
NS_ASSERTION(!entry->mServiceObject, "Created two instances of a service!");
entry->mServiceObject = service;
*result = service.get();
if (!*result) {
NS_ERROR("Factory did not return an object but returned success!");
return NS_ERROR_SERVICE_NOT_FOUND;
}
NS_ADDREF(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) {
void *mem;
PL_ARENA_ALLOCATE(mem, &mArena, sizeof(nsFactoryEntry));
if (!mem)
return NS_ERROR_OUT_OF_MEMORY;
entry = new (mem) nsFactoryEntry(aClass, (nsIFactory*) nsnull);
nsFactoryTableEntry* factoryTableEntry =
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 =
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)
{
NS_ENSURE_ARG_POINTER(aContractID);
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) {
void *mem;
PL_ARENA_ALLOCATE(mem, &mArena, sizeof(nsFactoryEntry));
if (!mem)
return NS_ERROR_OUT_OF_MEMORY;
entry = new (mem) nsFactoryEntry(kEmptyCID, (nsIFactory*) nsnull);
nsContractIDTableEntry* contractIDTableEntry =
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 don't 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, don't 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 =
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 don't 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, don't 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 =
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 =
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, don't 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);
nsFactoryEntry *entry = nsnull;
nsContractIDTableEntry* contractIDTableEntry =
static_cast<nsContractIDTableEntry*>
(PL_DHashTableOperate(&mContractIDs, aContractID,
PL_DHASH_LOOKUP));
if (!PL_DHASH_ENTRY_IS_BUSY(contractIDTableEntry))
return NS_ERROR_FACTORY_NOT_REGISTERED;
entry = contractIDTableEntry->mFactoryEntry;
NS_ASSERTION(entry, "This should never be null!");
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);
}
PRThread* currentPRThread = PR_GetCurrentThread();
NS_ASSERTION(currentPRThread, "This should never be null!");
// Needed to optimize the event loop below.
nsIThread* currentThread = nsnull;
PRThread* pendingPRThread;
while ((pendingPRThread = GetPendingServiceThread(entry->mCid))) {
if (pendingPRThread == currentPRThread) {
NS_ERROR("Recursive GetService!");
return NS_ERROR_NOT_AVAILABLE;
}
mon.Exit();
if (!currentThread) {
currentThread = NS_GetCurrentThread();
NS_ASSERTION(currentThread, "This should never be null!");
}
// This will process a single event or yield the thread if no event is
// pending.
if (!NS_ProcessNextEvent(currentThread, PR_FALSE)) {
PR_Sleep(PR_INTERVAL_NO_WAIT);
}
mon.Enter();
}
if (currentThread && entry->mServiceObject) {
// If we have a currentThread then we must have waited on another thread
// to create the service. Grab it now if that succeeded.
nsCOMPtr<nsISupports> serviceObject = entry->mServiceObject;
mon.Exit();
return serviceObject->QueryInterface(aIID, result);
}
#ifdef DEBUG
PendingServiceInfo* newInfo =
#endif
AddPendingService(entry->mCid, currentPRThread);
NS_ASSERTION(newInfo, "Failed to add info to the array!");
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();
nsresult rv = CreateInstanceByContractID(aContractID, nsnull, aIID,
getter_AddRefs(service));
mon.Enter();
#ifdef DEBUG
pendingPRThread = GetPendingServiceThread(entry->mCid);
NS_ASSERTION(pendingPRThread == currentPRThread,
"Pending service array has been changed!");
#endif
RemovePendingService(entry->mCid);
if (NS_FAILED(rv))
return rv;
NS_ASSERTION(!entry->mServiceObject, "Created two instances of a service!");
entry->mServiceObject = service;
*result = service.get();
NS_ADDREF(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;
}
NS_IMETHODIMP
nsComponentManagerImpl::RegistryLocationForSpec(nsIFile *aSpec,
char **aRegistryName)
{
nsCAutoString location;
nsresult rv = RegistryLocationForFile(aSpec, location);
if (NS_SUCCEEDED(rv)) {
*aRegistryName = ToNewCString(location);
if (!*aRegistryName)
return NS_ERROR_OUT_OF_MEMORY;
}
return rv;
}
nsresult
nsComponentManagerImpl::RegistryLocationForFile(nsIFile* aFile,
nsCString& aRegistryName)
{
nsresult rv;
if (!mComponentsDir)
return NS_ERROR_NOT_INITIALIZED;
// First check to see if this component is in the application
// components directory
PRBool containedIn;
mComponentsDir->Contains(aFile, PR_TRUE, &containedIn);
nsCAutoString nativePathString;
if (containedIn){
rv = aFile->GetNativePath(nativePathString);
if (NS_FAILED(rv))
return rv;
aRegistryName.Assign(NS_LITERAL_CSTRING(XPCOM_RELCOMPONENT_PREFIX) +
Substring(nativePathString, mComponentsOffset + 1));
return NS_OK;
}
// Next check to see if this component is in the GRE
// components directory
mGREComponentsDir->Contains(aFile, PR_TRUE, &containedIn);
if (containedIn){
rv = aFile->GetNativePath(nativePathString);
if (NS_FAILED(rv))
return rv;
aRegistryName.Assign(NS_LITERAL_CSTRING(XPCOM_GRECOMPONENT_PREFIX) +
Substring(nativePathString, mGREComponentsOffset + 1));
return NS_OK;
}
/* absolute names include volume info on Mac, so persistent descriptor */
rv = aFile->GetNativePath(nativePathString);
if (NS_FAILED(rv))
return rv;
aRegistryName.Assign(NS_LITERAL_CSTRING(XPCOM_ABSCOMPONENT_PREFIX) +
nativePathString);
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::SpecForRegistryLocation(const char *aLocation,
nsIFile **aSpec)
{
return FileForRegistryLocation(nsDependentCString(aLocation),
(nsILocalFile**) aSpec);
}
nsresult
nsComponentManagerImpl::FileForRegistryLocation(const nsCString &aLocation,
nsILocalFile **aSpec)
{
// i18n: assuming aLocation is encoded for the current locale
nsresult rv;
const nsDependentCSubstring prefix = Substring(aLocation, 0, 4);
/* abs:/full/path/to/libcomponent.so */
if (prefix.EqualsLiteral(XPCOM_ABSCOMPONENT_PREFIX)) {
nsLocalFile* file = new nsLocalFile;
if (!file) return NS_ERROR_FAILURE;
rv = file->InitWithNativePath(Substring(aLocation, 4));
file->QueryInterface(NS_GET_IID(nsILocalFile), (void**)aSpec);
return rv;
}
if (prefix.EqualsLiteral(XPCOM_RELCOMPONENT_PREFIX)) {
if (!mComponentsDir)
return NS_ERROR_NOT_INITIALIZED;
nsILocalFile* file = nsnull;
rv = mComponentsDir->Clone((nsIFile**)&file);
if (NS_FAILED(rv)) return rv;
rv = file->AppendRelativeNativePath(Substring(aLocation, 4));
*aSpec = file;
return rv;
}
if (prefix.EqualsLiteral(XPCOM_GRECOMPONENT_PREFIX)) {
if (!mGREComponentsDir)
return NS_ERROR_NOT_INITIALIZED;
nsILocalFile* file = nsnull;
rv = mGREComponentsDir->Clone((nsIFile**)&file);
if (NS_FAILED(rv)) return rv;
rv = file->AppendRelativeNativePath(Substring(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.
*/
NS_IMETHODIMP
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)
NS_Free(buf);
}
#endif
nsFactoryEntry *entry = nsnull;
nsFactoryTableEntry* factoryTableEntry = 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;
}
NS_IMETHODIMP
nsComponentManagerImpl::RegisterComponent(const nsCID &aClass,
const char *aClassName,
const char *aContractID,
const char *aPersistentDescriptor,
PRBool aReplace,
PRBool aPersist)
{
NS_ENSURE_ARG_POINTER(aPersistentDescriptor);
return RegisterComponentCommon(aClass, aClassName,
aContractID,
aContractID ? strlen(aContractID) : 0,
aPersistentDescriptor,
strlen(aPersistentDescriptor),
aReplace, aPersist,
nativeComponentType);
}
NS_IMETHODIMP
nsComponentManagerImpl::RegisterComponentWithType(const nsCID &aClass,
const char *aClassName,
const char *aContractID,
nsIFile *aSpec,
const char *aLocation,
PRBool aReplace,
PRBool aPersist,
const char *aType)
{
NS_ENSURE_ARG_POINTER(aLocation);
return RegisterComponentCommon(aClass, aClassName,
aContractID,
aContractID ? strlen(aContractID) : 0,
aLocation,
strlen(aLocation),
aReplace, aPersist,
aType);
}
/*
* Register a component, using whatever they stuck in the nsIFile.
*/
NS_IMETHODIMP
nsComponentManagerImpl::RegisterComponentSpec(const nsCID &aClass,
const char *aClassName,
const char *aContractID,
nsIFile *aLibrarySpec,
PRBool aReplace,
PRBool aPersist)
{
nsCAutoString registryName;
nsresult rv = RegistryLocationForFile(aLibrarySpec,
registryName);
if (NS_FAILED(rv))
return rv;
rv = RegisterComponentWithType(aClass, aClassName,
aContractID,
aLibrarySpec,
registryName.get(),
aReplace, aPersist,
nativeComponentType);
return rv;
}
NS_IMETHODIMP
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)
{
nsresult rv;
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)
NS_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);
if (typeIndex == NS_LOADER_TYPE_INVALID)
return NS_ERROR_OUT_OF_MEMORY;
if (entry) {
entry->ReInit(typeIndex, aRegistryName);
}
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,
typeIndex,
aRegistryName);
if (!entry->mLocationKey)
return NS_ERROR_OUT_OF_MEMORY;
nsFactoryTableEntry* factoryTableEntry =
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 NS_OK;
}
nsIModuleLoader*
nsComponentManagerImpl::LoaderForType(LoaderType aType)
{
NS_ASSERTION(aType != NS_LOADER_TYPE_STATIC,
"Static component loader is special");
if (aType == NS_LOADER_TYPE_INVALID)
return nsnull;
if (aType == NS_LOADER_TYPE_NATIVE)
return &mNativeModuleLoader;
NS_ASSERTION(aType >= 0 && aType < mLoaderData.Length(),
"LoaderType out of range");
if (!mLoaderData[aType].loader) {
nsCOMPtr<nsIModuleLoader> loader;
loader = do_GetServiceFromCategory("module-loader",
mLoaderData[aType].type.get());
if (!loader)
return nsnull;
loader.swap(mLoaderData[aType].loader);
}
return mLoaderData[aType].loader;
}
void
nsComponentManagerImpl::GetAllLoaders()
{
NS_ASSERTION(mCategoryManager, "nsComponentManager used uninitialized");
nsCOMPtr<nsISimpleEnumerator> loaderEnum;
mCategoryManager->EnumerateCategory("module-loader",
getter_AddRefs(loaderEnum));
nsCOMPtr<nsIUTF8StringEnumerator>
loaderStrings(do_QueryInterface(loaderEnum));
if (loaderStrings) {
PRBool hasMore;
while (NS_SUCCEEDED(loaderStrings->HasMore(&hasMore)) && hasMore) {
nsCAutoString loaderType;
if (NS_FAILED(loaderStrings->GetNext(loaderType)))
continue;
// We depend on the loader being created. Add the loader type and
// create the loader object too.
(void) LoaderForType(AddLoaderType(loaderType.get()));
}
}
}
// Convert a loader type string into an index into the component data
// array. Empty loader types are converted to NATIVE.
LoaderType
nsComponentManagerImpl::GetLoaderType(const char *typeStr)
{
if (!typeStr || !*typeStr) {
// Empty type strings are NATIVE
return NS_LOADER_TYPE_NATIVE;
}
if (!strcmp(typeStr, staticComponentType))
return NS_LOADER_TYPE_STATIC;
if (!strcmp(typeStr, nativeComponentType))
return NS_LOADER_TYPE_NATIVE;
const nsDependentCString type(typeStr);
for (unsigned int i = 0; i < mLoaderData.Length(); ++i) {
if (mLoaderData[i].type == type)
return i;
}
return NS_LOADER_TYPE_INVALID;
}
// Add a loader type if not already known. Out the typeIndex
// if the loader type is either added or already there.
LoaderType
nsComponentManagerImpl::AddLoaderType(const char *typeStr)
{
LoaderType typeIndex = GetLoaderType(typeStr);
if (typeIndex != NS_LOADER_TYPE_INVALID)
return typeIndex;
// Add the loader type
nsLoaderdata *elem = mLoaderData.AppendElement();
if (!elem)
return NS_LOADER_TYPE_INVALID;
elem->type.Assign(typeStr);
return mLoaderData.Length() - 1;
}
typedef struct
{
const nsCID* cid;
nsIFactory* factory;
} UnregisterConditions;
static PLDHashOperator
DeleteFoundCIDs(PLDHashTable *aTable,
PLDHashEntryHdr *aHdr,
PRUint32 aNumber,
void *aData)
{
nsContractIDTableEntry* entry = 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->factory == factoryEntry->mFactory.get())
return PL_DHASH_REMOVE;
return PL_DHASH_NEXT;
}
void
nsComponentManagerImpl::DeleteContractIDEntriesByCID(const nsCID* aClass, nsIFactory* factory)
{
UnregisterConditions aData;
aData.cid = aClass;
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)
NS_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;
}
NS_IMETHODIMP
nsComponentManagerImpl::UnregisterComponent(const nsCID &aClass,
const char *registryName)
{
NS_ERROR("Don't call nsIComponentManagerObsolete.unregisterComponent");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsComponentManagerImpl::UnregisterComponentSpec(const nsCID &aClass,
nsIFile *aLibrarySpec)
{
NS_ERROR("Don't call nsIComponentManagerObsolete.unregisterComponentSpec");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsComponentManagerImpl::FreeLibraries(void)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
/**
* 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
*
*/
NS_IMETHODIMP
nsComponentManagerImpl::AutoRegister(PRInt32 when, nsIFile *inDirSpec)
{
return AutoRegister(inDirSpec);
}
nsresult
nsComponentManagerImpl::AutoRegisterImpl(nsIFile *inDirSpec,
nsCOMArray<nsILocalFile> &aLeftovers,
nsTArray<DeferredModule> &aDeferred)
{
NS_ASSERTION(inDirSpec, "inDirSpec must not be null");
nsresult rv;
PRBool isDir;
rv = inDirSpec->IsDirectory(&isDir);
if (NS_FAILED(rv))
return rv;
if (isDir)
return AutoRegisterDirectory(inDirSpec, aLeftovers, aDeferred);
nsCOMPtr<nsILocalFile> lf(do_QueryInterface(inDirSpec));
if (!lf)
return NS_NOINTERFACE;
rv = AutoRegisterComponent(lf, aDeferred);
if (NS_FAILED(rv))
aLeftovers.AppendObject(lf);
return rv;
}
nsresult
nsComponentManagerImpl::AutoRegisterDirectory(nsIFile *inDirSpec,
nsCOMArray<nsILocalFile> &aLeftovers,
nsTArray<DeferredModule> &aDeferred)
{
nsCOMPtr<nsISimpleEnumerator> entries;
nsresult rv = inDirSpec->GetDirectoryEntries(getter_AddRefs(entries));
if (NS_FAILED(rv))
return rv;
PRBool hasMore;
nsCOMPtr<nsISupports> elem;
while (NS_SUCCEEDED(entries->HasMoreElements(&hasMore)) && hasMore) {
entries->GetNext(getter_AddRefs(elem));
nsCOMPtr<nsILocalFile> lf(do_QueryInterface(elem));
if (!lf) {
NS_ERROR("Directory enumerator misbehaving");
continue;
}
PRBool isDir;
rv = lf->IsDirectory(&isDir);
if (NS_FAILED(rv))
continue;
if (isDir)
AutoRegisterDirectory(lf, aLeftovers, aDeferred);
else {
rv = AutoRegisterComponent(lf, aDeferred);
if (NS_FAILED(rv))
aLeftovers.AppendObject(lf);
}
}
return NS_OK;
}
nsresult
nsComponentManagerImpl::AutoRegisterComponent(PRInt32 unused,
nsIFile *component)
{
nsCOMPtr<nsILocalFile> lf(do_QueryInterface(component));
if (!lf)
return NS_NOINTERFACE;
GetAllLoaders();
nsTArray<DeferredModule> deferred;
nsresult rv = AutoRegisterComponent(lf, deferred);
if (deferred.Length())
return NS_ERROR_FACTORY_REGISTER_AGAIN;
return rv;
}
nsresult
nsComponentManagerImpl::AutoRegisterComponent(nsILocalFile* aComponentFile,
nsTArray<DeferredModule> &aDeferred,
LoaderType minLoader)
{
nsresult rv;
NS_ASSERTION(minLoader < GetLoaderCount(), "Bad minLoader");
nsCAutoString registryLocation;
rv = RegistryLocationForFile(aComponentFile, registryLocation);
if (NS_FAILED(rv))
return rv;
const nsDependentCSubstring extension = StringTail(registryLocation, 4);
if (extension.LowerCaseEqualsLiteral(".dat") ||
extension.LowerCaseEqualsLiteral(".xpt"))
return NS_OK;
nsCOMPtr<nsIHashable> lfhash(do_QueryInterface(aComponentFile));
if (!lfhash) {
NS_ERROR("localfile not implementing nsIHashable!");
return NS_NOINTERFACE;
}
PRInt64 modTime = 0;
if (NS_SUCCEEDED(aComponentFile->GetLastModifiedTime(&modTime))) {
PRInt64 cachedModTime;
if (mAutoRegEntries.Get(lfhash, &cachedModTime) &&
cachedModTime == modTime)
return NS_OK;
}
const char *registryType = nsnull;
nsCOMPtr<nsIModule> module;
if (minLoader == NS_LOADER_TYPE_NATIVE) {
rv = mNativeModuleLoader.LoadModule(aComponentFile,
getter_AddRefs(module));
if (NS_SUCCEEDED(rv)) {
if (!module) {
NS_ERROR("Module loader succeeded without returning a module");
return NS_ERROR_FAILURE;
}
registryType = nativeComponentType;
}
minLoader = 0;
}
if (!registryType) {
for (; minLoader < GetLoaderCount(); ++minLoader) {
nsIModuleLoader* loader = LoaderForType(minLoader);
if (!loader)
continue;
rv = loader->LoadModule(aComponentFile, getter_AddRefs(module));
if (NS_SUCCEEDED(rv)) {
if (!module) {
NS_ERROR("Module loader succeeded without returning a module.");
return NS_ERROR_FAILURE;
}
registryType = StringForLoaderType(minLoader);
break;
}
}
if (!registryType) {
return NS_ERROR_FAILURE;
}
}
rv = module->RegisterSelf(this, aComponentFile, registryLocation.get(),
registryType);
if (NS_ERROR_FACTORY_REGISTER_AGAIN == rv) {
DeferredModule *d = aDeferred.AppendElement();
if (!d)
return NS_ERROR_OUT_OF_MEMORY;
d->type = registryType;
d->file = aComponentFile;
d->location = registryLocation;
d->module = module;
d->modTime = modTime;
return NS_OK;
}
if (NS_SUCCEEDED(rv) && modTime != 0)
mAutoRegEntries.Put(lfhash, modTime);
return rv;
}
void
nsComponentManagerImpl::LoadLeftoverComponents(
nsCOMArray<nsILocalFile> &aLeftovers,
nsTArray<DeferredModule> &aDeferred,
LoaderType minLoader)
{
NS_ASSERTION(minLoader >= GetLoaderCount(), "Corrupted minLoader");
GetAllLoaders();
// If there aren't any new loaders found since we tried this last, there's
// nothing left to do.
if (GetLoaderCount() == minLoader)
return;
LoaderType curLoader = GetLoaderCount();
for (PRInt32 i = 0; i < aLeftovers.Count(); ) {
nsresult rv = AutoRegisterComponent(aLeftovers[i], aDeferred,
minLoader);
if (NS_SUCCEEDED(rv)) {
aLeftovers.RemoveObjectAt(i);
}
else {
++i;
}
}
if (aLeftovers.Count())
// recursively try this again until there are no new loaders found
LoadLeftoverComponents(aLeftovers, aDeferred, curLoader);
}
void
nsComponentManagerImpl::LoadDeferredModules(nsTArray<DeferredModule> &aDeferred)
{
// We keep looping through deferred components until one of
// 1) they're all gone
// 2) we loop through and none of them succeed
PRUint32 lastCount = PR_UINT32_MAX;
while (aDeferred.Length() > 0 &&
lastCount > aDeferred.Length()) {
lastCount = aDeferred.Length();
for (PRInt32 i = 0; i < aDeferred.Length(); ) {
DeferredModule &d = aDeferred[i];
nsresult rv = d.module->RegisterSelf(this,
d.file,
d.location.get(),
d.type);
if (NS_SUCCEEDED(rv) && d.modTime != 0) {
nsCOMPtr<nsIHashable> lfhash(do_QueryInterface(d.file));
if (lfhash)
mAutoRegEntries.Put(lfhash, d.modTime);
}
if (rv != NS_ERROR_FACTORY_REGISTER_AGAIN) {
aDeferred.RemoveElementAt(i);
}
else {
++i;
}
}
}
}
NS_IMETHODIMP
nsComponentManagerImpl::AutoUnregisterComponent(PRInt32 /* unused */,
nsIFile *component)
{
nsresult rv;
GetAllLoaders();
nsCAutoString location;
rv = RegistryLocationForFile(component, location);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsILocalFile> lf(do_QueryInterface(component));
if (!lf)
return NS_NOINTERFACE;
nsCOMPtr<nsIModule> module;
rv = mNativeModuleLoader.LoadModule(lf, getter_AddRefs(module));
if (NS_FAILED(rv)) {
for (LoaderType i = 0; i < mLoaderData.Length(); ++i) {
nsIModuleLoader* loader = LoaderForType(i);
if (!loader)
continue;
if (NS_SUCCEEDED(loader->LoadModule(lf, getter_AddRefs(module))) &&
module) {
break;
}
}
}
if (!module)
return NS_ERROR_FAILURE;
rv = module->UnregisterSelf(this, lf, location.get());
nsCOMPtr<nsIHashable> lfhash(do_QueryInterface(lf));
mAutoRegEntries.Remove(lfhash);
return rv;
}
NS_IMETHODIMP
nsComponentManagerImpl::IsRegistered(const nsCID &aClass,
PRBool *aRegistered)
{
if (!aRegistered)
{
NS_ERROR("null ptr");
return NS_ERROR_NULL_POINTER;
}
*aRegistered = (nsnull != GetFactoryEntry(aClass));
return NS_OK;
}
NS_IMETHODIMP
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 = static_cast<nsIEnumerator*>(aEnum);
return NS_OK;
}
NS_IMETHODIMP
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 = static_cast<nsIEnumerator*>(aEnum);
return NS_OK;
}
// nsIComponentRegistrar
static void
RegisterStaticModule(const char *key, nsIModule* module,
nsTArray<DeferredModule> &deferred)
{
nsresult rv = module->
RegisterSelf(nsComponentManagerImpl::gComponentManager,
nsnull, key, staticComponentType);
if (NS_ERROR_FACTORY_REGISTER_AGAIN == rv) {
DeferredModule *d = deferred.AppendElement();
if (d) {
d->type = staticComponentType;
d->location = key;
}
}
}
static void
ReportLoadFailure(nsIFile* aFile, nsIConsoleService* aCS)
{
nsAutoString message;
aFile->GetPath(message);
message.Insert(NS_LITERAL_STRING("Failed to load XPCOM component: "), 0);
aCS->LogStringMessage(message.get());
}
NS_IMETHODIMP
nsComponentManagerImpl::AutoRegister(nsIFile *aSpec)
{
nsresult rv;
if (!mCategoryManager) {
mCategoryManager = do_GetService(NS_CATEGORYMANAGER_CONTRACTID, &rv);
if (NS_FAILED(rv))
return rv;
}
GetAllLoaders();
// Notify observers of xpcom autoregistration start
NS_CreateServicesFromCategory(NS_XPCOM_AUTOREGISTRATION_OBSERVER_ID,
aSpec, "start");
nsCOMArray<nsILocalFile> leftovers;
nsTArray<DeferredModule> deferred;
if (!aSpec) {
mStaticModuleLoader.EnumerateModules(RegisterStaticModule,
deferred);
// Builtin component loaders (xpconnect!) can be static modules.
// Set them up now, so that JS components don't go into
// the leftovers list.
GetAllLoaders();
}
LoaderType curLoader = GetLoaderCount();
if (aSpec) {
rv = AutoRegisterImpl(aSpec, leftovers, deferred);
}
else {
// register static components, then GRE components, then
// NS_XPCOM_COMPONENT_DIR, then NS_XPCOM_COMPONENT_DIR_LIST
PRBool equals = PR_FALSE;
if (mGREComponentsDir &&
NS_SUCCEEDED(mGREComponentsDir->Equals(mComponentsDir, &equals)) &&
!equals) {
rv = AutoRegisterImpl(mGREComponentsDir, leftovers, deferred);
if (NS_FAILED(rv)) {
NS_WARNING("Couldn't register mGREComponentsDir");
}
}
rv = AutoRegisterImpl(mComponentsDir, leftovers, deferred);
if (NS_FAILED(rv)) {
NS_WARNING("Couldn't register mComponentsDir");
}
nsCOMPtr<nsISimpleEnumerator> dirList;
rv = nsDirectoryService::gService->Get(NS_XPCOM_COMPONENT_DIR_LIST,
NS_GET_IID(nsISimpleEnumerator),
getter_AddRefs(dirList));
if (NS_SUCCEEDED(rv) && dirList) {
PRBool hasMore;
nsCOMPtr<nsISupports> elem;
while (NS_SUCCEEDED(dirList->HasMoreElements(&hasMore)) &&
hasMore) {
dirList->GetNext(getter_AddRefs(elem));
nsCOMPtr<nsIFile> dir(do_QueryInterface(elem));
if (dir) {
AutoRegisterImpl(dir, leftovers, deferred);
}
}
}
rv = NS_OK;
}
if (NS_SUCCEEDED(rv)) {
// We may have found new component loaders in the meantime, try to go
// back and load the leftovers.
if (leftovers.Count())
LoadLeftoverComponents(leftovers, deferred, curLoader);
// If a module said its loading should be deferred, register it now
if (deferred.Length())
LoadDeferredModules(deferred);
nsCOMPtr<nsIConsoleService>
cs(do_GetService(NS_CONSOLESERVICE_CONTRACTID));
if (cs) {
for (PRInt32 i = 0; i < leftovers.Count(); ++i) {
ReportLoadFailure(leftovers[i], cs);
}
}
}
// Notify observers of xpcom autoregistration completion
NS_CreateServicesFromCategory(NS_XPCOM_AUTOREGISTRATION_OBSERVER_ID,
aSpec,
"end");
if (mRegistryDirty)
WritePersistentRegistry();
return rv;
}
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)
{
nsCAutoString registryName;
if (!loaderStr)
{
nsresult rv = RegistryLocationForFile(aFile, 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)
{
NS_ENSURE_ARG_POINTER(aClass);
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 = 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 = 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;
}
////////////////////////////////////////////////////////////////////////////////
// nsFactoryEntry
////////////////////////////////////////////////////////////////////////////////
nsFactoryEntry::nsFactoryEntry(const nsCID &aClass,
LoaderType aLoaderType,
const char *aLocationKey,
nsFactoryEntry *aParent) :
mCid(aClass),
mLoaderType(aLoaderType),
mLocationKey(
ArenaStrdup(aLocationKey,
&nsComponentManagerImpl::gComponentManager->mArena)),
mParent(aParent)
{
}
void
nsFactoryEntry::ReInit(LoaderType aLoaderType,
const char *aLocationKey)
{
mLoaderType = aLoaderType;
if (!mLocationKey || strcmp(mLocationKey, aLocationKey)) {
mLocationKey =
ArenaStrdup(aLocationKey,
&nsComponentManagerImpl::gComponentManager->mArena);
}
}
nsresult
nsFactoryEntry::GetFactory(nsIFactory **aFactory)
{
if (!mFactory) {
nsresult rv;
if (mLoaderType == NS_LOADER_TYPE_INVALID)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIModule> module;
if (mLoaderType == NS_LOADER_TYPE_STATIC) {
rv = nsComponentManagerImpl::gComponentManager->
mStaticModuleLoader.
GetModuleFor(mLocationKey,
getter_AddRefs(module));
}
else {
nsCOMPtr<nsILocalFile> moduleFile;
rv = nsComponentManagerImpl::gComponentManager->
FileForRegistryLocation(nsDependentCString(mLocationKey),
getter_AddRefs(moduleFile));
NS_ENSURE_SUCCESS(rv, rv);
nsIModuleLoader* loader =
nsComponentManagerImpl::gComponentManager->
LoaderForType(mLoaderType);
if (!loader)
return NS_ERROR_FAILURE;
rv = loader->LoadModule(moduleFile,
getter_AddRefs(module));
}
if (NS_FAILED(rv))
return rv;
if (!module) {
NS_ERROR("Module returned success but no module!");
return NS_ERROR_FAILURE;
}
rv = module->
GetClassObject(nsComponentManagerImpl::gComponentManager,
mCid,
NS_GET_IID(nsIFactory),
getter_AddRefs(mFactory));
if (NS_FAILED(rv))
return rv;
NS_ASSERTION(mFactory,
"Loader says it succeeded; got null factory!");
if (!mFactory)
return NS_ERROR_UNEXPECTED;
}
*aFactory = mFactory.get();
NS_ADDREF(*aFactory);
return NS_OK;
}
nsFactoryEntry::~nsFactoryEntry()
{
// nsFactoryEntry is arena-allocated. So we don't delete it;
// call the destructor by hand.
if (mParent)
mParent->~nsFactoryEntry();
}
////////////////////////////////////////////////////////////////////////////////
// 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 = 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 = 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 = static_cast<nsIComponentRegistrar*>
(nsComponentManagerImpl::gComponentManager);
NS_IF_ADDREF(*result);
return NS_OK;
}
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