mozilla
/
gecko-dev
зеркало из https://github.com/mozilla/gecko-dev.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
gecko-dev/xpcom/components/nsComponentManager.cpp

1951 строка
58 KiB
C++
Исходник Ответственный История

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* 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 "nsCategoryManager.h"
#include "nsCOMPtr.h"
#include "nsComponentManager.h"
#include "nsDirectoryService.h"
#include "nsDirectoryServiceDefs.h"
#include "nsCategoryManager.h"
#include "nsCategoryManagerUtils.h"
#include "xptiprivate.h"
#include "mozilla/MemoryReporting.h"
#include "mozilla/XPTInterfaceInfoManager.h"
#include "nsIConsoleService.h"
#include "nsIMemoryReporter.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 "prio.h"
#include "ManifestParser.h"
#include "mozilla/Services.h"
#include "nsManifestLineReader.h"
#include "mozilla/GenericFactory.h"
#include "nsSupportsPrimitives.h"
#include "nsArrayEnumerator.h"
#include "nsStringEnumerator.h"
#include "mozilla/FileUtils.h"
#include <new> // for placement new
#include "mozilla/Omnijar.h"
#include "prlog.h"
using namespace mozilla;
PRLogModuleInfo* nsComponentManagerLog = nullptr;
// defined in nsStaticXULComponents.cpp to contain all the components in
// libxul.
extern mozilla::Module const *const *const kPStaticModules[];
#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 jarComponentType[]="application/x-mozilla-jarjs";
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
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, uint32_t 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);
}
// GetService and a few other functions need to exit their mutex mid-function
// without reentering it later in the block. This class supports that
// style of early-exit that MutexAutoUnlock doesn't.
namespace {
class MOZ_STACK_CLASS MutexLock
{
public:
MutexLock(SafeMutex& aMutex)
: mMutex(aMutex)
, mLocked(false)
{
Lock();
}
~MutexLock()
{
if (mLocked)
Unlock();
}
void Lock()
{
NS_ASSERTION(!mLocked, "Re-entering a mutex");
mMutex.Lock();
mLocked = true;
}
void Unlock()
{
NS_ASSERTION(mLocked, "Exiting a mutex that isn't held!");
mMutex.Unlock();
mLocked = false;
}
private:
SafeMutex& mMutex;
bool mLocked;
};
} // anonymous namespace
// this is safe to call during InitXPCOM
static already_AddRefed<nsIFile>
GetLocationFromDirectoryService(const char* prop)
{
nsCOMPtr<nsIProperties> directoryService;
nsDirectoryService::Create(nullptr,
NS_GET_IID(nsIProperties),
getter_AddRefs(directoryService));
if (!directoryService)
return nullptr;
nsCOMPtr<nsIFile> file;
nsresult rv = directoryService->Get(prop,
NS_GET_IID(nsIFile),
getter_AddRefs(file));
if (NS_FAILED(rv))
return nullptr;
return file.forget();
}
static already_AddRefed<nsIFile>
CloneAndAppend(nsIFile* aBase, const nsACString& append)
{
nsCOMPtr<nsIFile> f;
aBase->Clone(getter_AddRefs(f));
if (!f)
return nullptr;
f->AppendNative(append);
return f.forget();
}
////////////////////////////////////////////////////////////////////////////////
// nsComponentManagerImpl
////////////////////////////////////////////////////////////////////////////////
NS_MEMORY_REPORTER_MALLOC_SIZEOF_FUN(ComponentManagerMallocSizeOf)
static int64_t
GetComponentManagerSize()
{
MOZ_ASSERT(nsComponentManagerImpl::gComponentManager);
return nsComponentManagerImpl::gComponentManager->SizeOfIncludingThis(
ComponentManagerMallocSizeOf);
}
NS_MEMORY_REPORTER_IMPLEMENT(ComponentManager,
"explicit/xpcom/component-manager",
KIND_HEAP,
nsIMemoryReporter::UNITS_BYTES,
GetComponentManagerSize,
"Memory used for the XPCOM component manager.")
nsresult
nsComponentManagerImpl::Create(nsISupports* aOuter, REFNSIID aIID, void** aResult)
{
if (aOuter)
return NS_ERROR_NO_AGGREGATION;
if (!gComponentManager)
return NS_ERROR_FAILURE;
return gComponentManager->QueryInterface(aIID, aResult);
}
nsComponentManagerImpl::nsComponentManagerImpl()
: mLock("nsComponentManagerImpl.mLock")
, mStatus(NOT_INITIALIZED)
{
}
#define CONTRACTID_HASHTABLE_INITIAL_SIZE 2048
nsTArray<const mozilla::Module*>* nsComponentManagerImpl::sStaticModules;
/* static */ void
nsComponentManagerImpl::InitializeStaticModules()
{
if (sStaticModules)
return;
sStaticModules = new nsTArray<const mozilla::Module*>;
for (const mozilla::Module *const *const *staticModules = kPStaticModules;
*staticModules; ++staticModules)
sStaticModules->AppendElement(**staticModules);
}
nsTArray<nsComponentManagerImpl::ComponentLocation>*
nsComponentManagerImpl::sModuleLocations;
/* static */ void
nsComponentManagerImpl::InitializeModuleLocations()
{
if (sModuleLocations)
return;
sModuleLocations = new nsTArray<ComponentLocation>;
}
nsresult nsComponentManagerImpl::Init()
{
PR_ASSERT(NOT_INITIALIZED == mStatus);
if (nsComponentManagerLog == nullptr)
{
nsComponentManagerLog = PR_NewLogModule("nsComponentManager");
}
// Initialize our arena
PL_INIT_ARENA_POOL(&mArena, "ComponentManagerArena", NS_CM_BLOCK_SIZE);
mFactories.Init(CONTRACTID_HASHTABLE_INITIAL_SIZE);
mContractIDs.Init(CONTRACTID_HASHTABLE_INITIAL_SIZE);
mLoaderMap.Init();
mKnownModules.Init();
nsCOMPtr<nsIFile> greDir =
GetLocationFromDirectoryService(NS_GRE_DIR);
nsCOMPtr<nsIFile> appDir =
GetLocationFromDirectoryService(NS_XPCOM_CURRENT_PROCESS_DIR);
InitializeStaticModules();
InitializeModuleLocations();
ComponentLocation* cl = sModuleLocations->InsertElementAt(0);
nsCOMPtr<nsIFile> lf = CloneAndAppend(appDir, NS_LITERAL_CSTRING("chrome.manifest"));
cl->type = NS_COMPONENT_LOCATION;
cl->location.Init(lf);
bool equals = false;
appDir->Equals(greDir, &equals);
if (!equals) {
cl = sModuleLocations->InsertElementAt(0);
cl->type = NS_COMPONENT_LOCATION;
lf = CloneAndAppend(greDir, NS_LITERAL_CSTRING("chrome.manifest"));
cl->location.Init(lf);
}
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG,
("nsComponentManager: Initialized."));
nsresult rv = mNativeModuleLoader.Init();
if (NS_FAILED(rv))
return rv;
nsCategoryManager::GetSingleton()->SuppressNotifications(true);
RegisterModule(&kXPCOMModule, nullptr);
for (uint32_t i = 0; i < sStaticModules->Length(); ++i)
RegisterModule((*sStaticModules)[i], nullptr);
nsRefPtr<nsZipArchive> appOmnijar = mozilla::Omnijar::GetReader(mozilla::Omnijar::APP);
if (appOmnijar) {
cl = sModuleLocations->InsertElementAt(1); // Insert after greDir
cl->type = NS_COMPONENT_LOCATION;
cl->location.Init(appOmnijar, "chrome.manifest");
}
nsRefPtr<nsZipArchive> greOmnijar = mozilla::Omnijar::GetReader(mozilla::Omnijar::GRE);
if (greOmnijar) {
cl = sModuleLocations->InsertElementAt(0);
cl->type = NS_COMPONENT_LOCATION;
cl->location.Init(greOmnijar, "chrome.manifest");
}
RereadChromeManifests(false);
nsCategoryManager::GetSingleton()->SuppressNotifications(false);
mReporter = new NS_MEMORY_REPORTER_NAME(ComponentManager);
(void)::NS_RegisterMemoryReporter(mReporter);
// Unfortunately, we can't register the nsCategoryManager memory reporter
// in its constructor (which is triggered by the GetSingleton() call
// above) because the memory reporter manager isn't initialized at that
// point. So we wait until now.
nsCategoryManager::GetSingleton()->InitMemoryReporter();
mStatus = NORMAL;
return NS_OK;
}
void
nsComponentManagerImpl::RegisterModule(const mozilla::Module* aModule,
FileLocation* aFile)
{
mLock.AssertNotCurrentThreadOwns();
{
// Scope the monitor so that we don't hold it while calling into the
// category manager.
MutexLock lock(mLock);
KnownModule* m;
if (aFile) {
nsCString uri;
aFile->GetURIString(uri);
NS_ASSERTION(!mKnownModules.Get(uri),
"Must not register a binary module twice.");
m = new KnownModule(aModule, *aFile);
mKnownModules.Put(uri, m);
} else {
m = new KnownModule(aModule);
mKnownStaticModules.AppendElement(m);
}
if (aModule->mCIDs) {
const mozilla::Module::CIDEntry* entry;
for (entry = aModule->mCIDs; entry->cid; ++entry)
RegisterCIDEntryLocked(entry, m);
}
if (aModule->mContractIDs) {
const mozilla::Module::ContractIDEntry* entry;
for (entry = aModule->mContractIDs; entry->contractid; ++entry)
RegisterContractIDLocked(entry);
MOZ_ASSERT(!entry->cid, "Incorrectly terminated contract list");
}
}
if (aModule->mCategoryEntries) {
const mozilla::Module::CategoryEntry* entry;
for (entry = aModule->mCategoryEntries; entry->category; ++entry)
nsCategoryManager::GetSingleton()->
AddCategoryEntry(entry->category,
entry->entry,
entry->value);
}
}
void
nsComponentManagerImpl::RegisterCIDEntryLocked(
const mozilla::Module::CIDEntry* aEntry,
KnownModule* aModule)
{
mLock.AssertCurrentThreadOwns();
nsFactoryEntry* f = mFactories.Get(*aEntry->cid);
if (f) {
NS_WARNING("Re-registering a CID?");
char idstr[NSID_LENGTH];
aEntry->cid->ToProvidedString(idstr);
nsCString existing;
if (f->mModule)
existing = f->mModule->Description();
else
existing = "<unknown module>";
LogMessage("While registering XPCOM module %s, trying to re-register CID '%s' already registered by %s.",
aModule->Description().get(),
idstr,
existing.get());
return;
}
f = new nsFactoryEntry(aEntry, aModule);
mFactories.Put(*aEntry->cid, f);
}
void
nsComponentManagerImpl::RegisterContractIDLocked(
const mozilla::Module::ContractIDEntry* aEntry)
{
mLock.AssertCurrentThreadOwns();
nsFactoryEntry* f = mFactories.Get(*aEntry->cid);
if (!f) {
NS_ERROR("No CID found when attempting to map contract ID");
char idstr[NSID_LENGTH];
aEntry->cid->ToProvidedString(idstr);
LogMessage("Could not map contract ID '%s' to CID %s because no implementation of the CID is registered.",
aEntry->contractid,
idstr);
return;
}
mContractIDs.Put(nsDependentCString(aEntry->contractid), f);
}
static void
CutExtension(nsCString& path)
{
int32_t dotPos = path.RFindChar('.');
if (kNotFound == dotPos)
path.Truncate();
else
path.Cut(0, dotPos + 1);
}
void
nsComponentManagerImpl::RegisterManifest(NSLocationType aType,
FileLocation &aFile,
bool aChromeOnly)
{
uint32_t len;
FileLocation::Data data;
nsAutoArrayPtr<char> buf;
nsresult rv = aFile.GetData(data);
if (NS_SUCCEEDED(rv)) {
rv = data.GetSize(&len);
}
if (NS_SUCCEEDED(rv)) {
buf = new char[len + 1];
rv = data.Copy(buf, len);
}
if (NS_SUCCEEDED(rv)) {
buf[len] = '\0';
ParseManifest(aType, aFile, buf, aChromeOnly);
} else if (NS_BOOTSTRAPPED_LOCATION != aType) {
nsCString uri;
aFile.GetURIString(uri);
LogMessage("Could not read chrome manifest '%s'.", uri.get());
}
}
void
nsComponentManagerImpl::ManifestManifest(ManifestProcessingContext& cx, int lineno, char *const * argv)
{
char* file = argv[0];
FileLocation f(cx.mFile, file);
RegisterManifest(cx.mType, f, cx.mChromeOnly);
}
void
nsComponentManagerImpl::ManifestBinaryComponent(ManifestProcessingContext& cx, int lineno, char *const * argv)
{
if (cx.mFile.IsZip()) {
NS_WARNING("Cannot load binary components from a jar.");
LogMessageWithContext(cx.mFile, lineno,
"Cannot load binary components from a jar.");
return;
}
FileLocation f(cx.mFile, argv[0]);
nsCString uri;
f.GetURIString(uri);
if (mKnownModules.Get(uri)) {
NS_WARNING("Attempting to register a binary component twice.");
LogMessageWithContext(cx.mFile, lineno,
"Attempting to register a binary component twice.");
return;
}
const mozilla::Module* m = mNativeModuleLoader.LoadModule(f);
// The native module loader should report an error here, we don't have to
if (!m)
return;
RegisterModule(m, &f);
}
void
nsComponentManagerImpl::ManifestXPT(ManifestProcessingContext& cx, int lineno, char *const * argv)
{
FileLocation f(cx.mFile, argv[0]);
uint32_t len;
FileLocation::Data data;
nsAutoArrayPtr<char> buf;
nsresult rv = f.GetData(data);
if (NS_SUCCEEDED(rv)) {
rv = data.GetSize(&len);
}
if (NS_SUCCEEDED(rv)) {
buf = new char[len];
rv = data.Copy(buf, len);
}
if (NS_SUCCEEDED(rv)) {
XPTInterfaceInfoManager::GetSingleton()->RegisterBuffer(buf, len);
} else {
nsCString uri;
f.GetURIString(uri);
LogMessage("Could not read '%s'.", uri.get());
}
}
void
nsComponentManagerImpl::ManifestComponent(ManifestProcessingContext& cx, int lineno, char *const * argv)
{
mLock.AssertNotCurrentThreadOwns();
char* id = argv[0];
char* file = argv[1];
nsID cid;
if (!cid.Parse(id)) {
LogMessageWithContext(cx.mFile, lineno,
"Malformed CID: '%s'.", id);
return;
}
// Precompute the hash/file data outside of the lock
FileLocation fl(cx.mFile, file);
nsCString hash;
fl.GetURIString(hash);
MutexLock lock(mLock);
nsFactoryEntry* f = mFactories.Get(cid);
if (f) {
char idstr[NSID_LENGTH];
cid.ToProvidedString(idstr);
nsCString existing;
if (f->mModule)
existing = f->mModule->Description();
else
existing = "<unknown module>";
lock.Unlock();
LogMessageWithContext(cx.mFile, lineno,
"Trying to re-register CID '%s' already registered by %s.",
idstr,
existing.get());
return;
}
KnownModule* km;
km = mKnownModules.Get(hash);
if (!km) {
km = new KnownModule(fl);
mKnownModules.Put(hash, km);
}
void* place;
PL_ARENA_ALLOCATE(place, &mArena, sizeof(nsCID));
nsID* permanentCID = static_cast<nsID*>(place);
*permanentCID = cid;
PL_ARENA_ALLOCATE(place, &mArena, sizeof(mozilla::Module::CIDEntry));
mozilla::Module::CIDEntry* e = new (place) mozilla::Module::CIDEntry();
e->cid = permanentCID;
f = new nsFactoryEntry(e, km);
mFactories.Put(cid, f);
}
void
nsComponentManagerImpl::ManifestContract(ManifestProcessingContext& cx, int lineno, char *const * argv)
{
mLock.AssertNotCurrentThreadOwns();
char* contract = argv[0];
char* id = argv[1];
nsID cid;
if (!cid.Parse(id)) {
LogMessageWithContext(cx.mFile, lineno,
"Malformed CID: '%s'.", id);
return;
}
MutexLock lock(mLock);
nsFactoryEntry* f = mFactories.Get(cid);
if (!f) {
lock.Unlock();
LogMessageWithContext(cx.mFile, lineno,
"Could not map contract ID '%s' to CID %s because no implementation of the CID is registered.",
contract, id);
return;
}
mContractIDs.Put(nsDependentCString(contract), f);
}
void
nsComponentManagerImpl::ManifestCategory(ManifestProcessingContext& cx, int lineno, char *const * argv)
{
char* category = argv[0];
char* key = argv[1];
char* value = argv[2];
nsCategoryManager::GetSingleton()->
AddCategoryEntry(category, key, value);
}
void
nsComponentManagerImpl::RereadChromeManifests(bool aChromeOnly)
{
for (uint32_t i = 0; i < sModuleLocations->Length(); ++i) {
ComponentLocation& l = sModuleLocations->ElementAt(i);
RegisterManifest(l.type, l.location, aChromeOnly);
}
}
bool
nsComponentManagerImpl::KnownModule::EnsureLoader()
{
if (!mLoader) {
nsCString extension;
mFile.GetURIString(extension);
CutExtension(extension);
mLoader = nsComponentManagerImpl::gComponentManager->LoaderForExtension(extension);
}
return !!mLoader;
}
bool
nsComponentManagerImpl::KnownModule::Load()
{
if (mFailed)
return false;
if (!mModule) {
if (!EnsureLoader())
return false;
mModule = mLoader->LoadModule(mFile);
if (!mModule) {
mFailed = true;
return false;
}
}
if (!mLoaded) {
if (mModule->loadProc) {
nsresult rv = mModule->loadProc();
if (NS_FAILED(rv)) {
mFailed = true;
return false;
}
}
mLoaded = true;
}
return true;
}
nsCString
nsComponentManagerImpl::KnownModule::Description() const
{
nsCString s;
if (mFile)
mFile.GetURIString(s);
else
s = "<static module>";
return s;
}
nsresult nsComponentManagerImpl::Shutdown(void)
{
PR_ASSERT(NORMAL == mStatus);
mStatus = SHUTDOWN_IN_PROGRESS;
// Shutdown the component manager
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG, ("nsComponentManager: Beginning Shutdown."));
(void)::NS_UnregisterMemoryReporter(mReporter);
mReporter = nullptr;
// Release all cached factories
mContractIDs.Clear();
mFactories.Clear(); // XXX release the objects, don't just clear
mLoaderMap.Clear();
mKnownModules.Clear();
mKnownStaticModules.Clear();
delete sStaticModules;
delete sModuleLocations;
// Unload libraries
mNativeModuleLoader.UnloadLibraries();
// delete arena for strings and small objects
PL_FinishArenaPool(&mArena);
mStatus = 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 (SHUTDOWN_COMPLETE != mStatus)
Shutdown();
PR_LOG(nsComponentManagerLog, PR_LOG_DEBUG, ("nsComponentManager: Destroyed."));
}
NS_IMPL_ISUPPORTS5(nsComponentManagerImpl,
nsIComponentManager,
nsIServiceManager,
nsIComponentRegistrar,
nsISupportsWeakReference,
nsIInterfaceRequestor)
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);
}
nsFactoryEntry *
nsComponentManagerImpl::GetFactoryEntry(const char *aContractID,
uint32_t aContractIDLen)
{
SafeMutexAutoLock lock(mLock);
return mContractIDs.Get(nsDependentCString(aContractID, aContractIDLen));
}
nsFactoryEntry *
nsComponentManagerImpl::GetFactoryEntry(const nsCID &aClass)
{
SafeMutexAutoLock lock(mLock);
return mFactories.Get(aClass);
}
already_AddRefed<nsIFactory>
nsComponentManagerImpl::FindFactory(const nsCID& aClass)
{
nsFactoryEntry* e = GetFactoryEntry(aClass);
if (!e)
return nullptr;
return e->GetFactory();
}
already_AddRefed<nsIFactory>
nsComponentManagerImpl::FindFactory(const char *contractID,
uint32_t aContractIDLen)
{
nsFactoryEntry *entry = GetFactoryEntry(contractID, aContractIDLen);
if (!entry)
return nullptr;
return entry->GetFactory();
}
/**
* 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;
#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 != nullptr);
nsCOMPtr<nsIFactory> factory = FindFactory(aClass);
if (!factory)
return NS_ERROR_FACTORY_NOT_REGISTERED;
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;
#ifdef PR_LOGGING
if (PR_LOG_TEST(nsComponentManagerLog, PR_LOG_DEBUG))
{
PR_LogPrint("nsComponentManager: GetClassObject(%s)", contractID);
}
#endif
nsCOMPtr<nsIFactory> factory = FindFactory(contractID, strlen(contractID));
if (!factory)
return NS_ERROR_FACTORY_NOT_REGISTERED;
rv = factory->QueryInterface(aIID, aResult);
PR_LOG(nsComponentManagerLog, PR_LOG_WARNING,
("\t\tGetClassObject() %s", NS_SUCCEEDED(rv) ? "succeeded" : "FAILED"));
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 == nullptr)
{
return NS_ERROR_NULL_POINTER;
}
*aResult = nullptr;
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());
nsAutoCString 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
nsresult rv;
nsCOMPtr<nsIFactory> factory = entry->GetFactory();
if (factory)
{
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;
}
}
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 == nullptr)
{
return NS_ERROR_NULL_POINTER;
}
*aResult = nullptr;
nsFactoryEntry *entry = GetFactoryEntry(aContractID, strlen(aContractID));
if (!entry)
return NS_ERROR_FACTORY_NOT_REGISTERED;
#ifdef SHOW_CI_ON_EXISTING_SERVICE
if (entry->mServiceObject) {
nsAutoCString 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
nsresult rv;
nsCOMPtr<nsIFactory> factory = entry->GetFactory();
if (factory)
{
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;
}
}
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;
}
static PLDHashOperator
FreeFactoryEntries(const nsID& aCID,
nsFactoryEntry* aEntry,
void* arg)
{
aEntry->mFactory = nullptr;
aEntry->mServiceObject = nullptr;
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;
mFactories.EnumerateRead(FreeFactoryEntries, nullptr);
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)
{
uint32_t pendingCount = mPendingServices.Length();
for (uint32_t 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
{
uint32_t pendingCount = mPendingServices.Length();
for (uint32_t index = 0; index < pendingCount; ++index) {
const PendingServiceInfo& info = mPendingServices.ElementAt(index);
if (info.cid->Equals(aServiceCID)) {
return info.thread;
}
}
return nullptr;
}
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;
}
// `service` must be released after the lock is released, so it must be
// declared before the lock in this C++ block.
nsCOMPtr<nsISupports> service;
MutexLock lock(mLock);
nsFactoryEntry* entry = mFactories.Get(aClass);
if (!entry)
return NS_ERROR_FACTORY_NOT_REGISTERED;
if (entry->mServiceObject) {
lock.Unlock();
return entry->mServiceObject->QueryInterface(aIID, result);
}
PRThread* currentPRThread = PR_GetCurrentThread();
MOZ_ASSERT(currentPRThread, "This should never be null!");
// Needed to optimize the event loop below.
nsIThread* currentThread = nullptr;
PRThread* pendingPRThread;
while ((pendingPRThread = GetPendingServiceThread(aClass))) {
if (pendingPRThread == currentPRThread) {
NS_ERROR("Recursive GetService!");
return NS_ERROR_NOT_AVAILABLE;
}
SafeMutexAutoUnlock unlockPending(mLock);
if (!currentThread) {
currentThread = NS_GetCurrentThread();
MOZ_ASSERT(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, false)) {
PR_Sleep(PR_INTERVAL_NO_WAIT);
}
}
// 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->mServiceObject) {
lock.Unlock();
return entry->mServiceObject->QueryInterface(aIID, result);
}
#ifdef DEBUG
PendingServiceInfo* newInfo =
#endif
AddPendingService(aClass, currentPRThread);
NS_ASSERTION(newInfo, "Failed to add info to the array!");
// We need to not be holding the service manager's lock while calling
// CreateInstance, because it invokes user code which could try to re-enter
// the service manager:
nsresult rv;
{
SafeMutexAutoUnlock unlock(mLock);
rv = CreateInstance(aClass, nullptr, aIID, getter_AddRefs(service));
}
if (NS_SUCCEEDED(rv) && !service) {
NS_ERROR("Factory did not return an object but returned success");
return NS_ERROR_SERVICE_NOT_FOUND;
}
#ifdef DEBUG
pendingPRThread = GetPendingServiceThread(aClass);
MOZ_ASSERT(pendingPRThread == currentPRThread,
"Pending service array has been changed!");
#endif
RemovePendingService(aClass);
if (NS_FAILED(rv))
return rv;
NS_ASSERTION(!entry->mServiceObject, "Created two instances of a service!");
entry->mServiceObject = service.forget();
lock.Unlock();
nsISupports** sresult = reinterpret_cast<nsISupports**>(result);
*sresult = entry->mServiceObject;
(*sresult)->AddRef();
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::IsServiceInstantiated(const nsCID & aClass,
const nsIID& aIID,
bool *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;
{
SafeMutexAutoLock lock(mLock);
entry = mFactories.Get(aClass);
}
if (entry && entry->mServiceObject) {
nsCOMPtr<nsISupports> service;
rv = entry->mServiceObject->QueryInterface(aIID, getter_AddRefs(service));
*result = (service!=nullptr);
}
return rv;
}
NS_IMETHODIMP nsComponentManagerImpl::IsServiceInstantiatedByContractID(const char *aContractID,
const nsIID& aIID,
bool *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;
{
SafeMutexAutoLock lock(mLock);
entry = mContractIDs.Get(nsDependentCString(aContractID));
}
if (entry && entry->mServiceObject) {
nsCOMPtr<nsISupports> service;
rv = entry->mServiceObject->QueryInterface(aIID, getter_AddRefs(service));
*result = (service!=nullptr);
}
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;
}
// `service` must be released after the lock is released, so it must be
// declared before the lock in this C++ block.
nsCOMPtr<nsISupports> service;
MutexLock lock(mLock);
nsFactoryEntry *entry = mContractIDs.Get(nsDependentCString(aContractID));
if (!entry)
return NS_ERROR_FACTORY_NOT_REGISTERED;
if (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.
// `entry` is valid until XPCOM shutdown, so we can safely use it after
// exiting the lock.
lock.Unlock();
return entry->mServiceObject->QueryInterface(aIID, result);
}
PRThread* currentPRThread = PR_GetCurrentThread();
MOZ_ASSERT(currentPRThread, "This should never be null!");
// Needed to optimize the event loop below.
nsIThread* currentThread = nullptr;
PRThread* pendingPRThread;
while ((pendingPRThread = GetPendingServiceThread(*entry->mCIDEntry->cid))) {
if (pendingPRThread == currentPRThread) {
NS_ERROR("Recursive GetService!");
return NS_ERROR_NOT_AVAILABLE;
}
SafeMutexAutoUnlock unlockPending(mLock);
if (!currentThread) {
currentThread = NS_GetCurrentThread();
MOZ_ASSERT(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, false)) {
PR_Sleep(PR_INTERVAL_NO_WAIT);
}
}
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.
lock.Unlock();
return entry->mServiceObject->QueryInterface(aIID, result);
}
#ifdef DEBUG
PendingServiceInfo* newInfo =
#endif
AddPendingService(*entry->mCIDEntry->cid, currentPRThread);
NS_ASSERTION(newInfo, "Failed to add info to the array!");
// We need to not be holding the service manager's lock while calling
// CreateInstance, because it invokes user code which could try to re-enter
// the service manager:
nsresult rv;
{
SafeMutexAutoUnlock unlock(mLock);
rv = CreateInstanceByContractID(aContractID, nullptr, aIID,
getter_AddRefs(service));
}
if (NS_SUCCEEDED(rv) && !service) {
NS_ERROR("Factory did not return an object but returned success");
return NS_ERROR_SERVICE_NOT_FOUND;
}
#ifdef DEBUG
pendingPRThread = GetPendingServiceThread(*entry->mCIDEntry->cid);
MOZ_ASSERT(pendingPRThread == currentPRThread,
"Pending service array has been changed!");
#endif
RemovePendingService(*entry->mCIDEntry->cid);
if (NS_FAILED(rv))
return rv;
NS_ASSERTION(!entry->mServiceObject, "Created two instances of a service!");
entry->mServiceObject = service.forget();
lock.Unlock();
nsISupports** sresult = reinterpret_cast<nsISupports**>(result);
*sresult = entry->mServiceObject;
(*sresult)->AddRef();
return NS_OK;
}
already_AddRefed<mozilla::ModuleLoader>
nsComponentManagerImpl::LoaderForExtension(const nsACString& aExt)
{
nsCOMPtr<mozilla::ModuleLoader> loader = mLoaderMap.Get(aExt);
if (!loader) {
loader = do_GetServiceFromCategory("module-loader",
PromiseFlatCString(aExt).get());
if (!loader)
return nullptr;
mLoaderMap.Put(aExt, loader);
}
return loader.forget();
}
NS_IMETHODIMP
nsComponentManagerImpl::RegisterFactory(const nsCID& aClass,
const char* aName,
const char* aContractID,
nsIFactory* aFactory)
{
if (!aFactory) {
// If a null factory is passed in, this call just wants to reset
// the contract ID to point to an existing CID entry.
if (!aContractID)
return NS_ERROR_INVALID_ARG;
SafeMutexAutoLock lock(mLock);
nsFactoryEntry* oldf = mFactories.Get(aClass);
if (!oldf)
return NS_ERROR_FACTORY_NOT_REGISTERED;
mContractIDs.Put(nsDependentCString(aContractID), oldf);
return NS_OK;
}
nsAutoPtr<nsFactoryEntry> f(new nsFactoryEntry(aClass, aFactory));
SafeMutexAutoLock lock(mLock);
nsFactoryEntry* oldf = mFactories.Get(aClass);
if (oldf)
return NS_ERROR_FACTORY_EXISTS;
if (aContractID)
mContractIDs.Put(nsDependentCString(aContractID), f);
mFactories.Put(aClass, f.forget());
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::UnregisterFactory(const nsCID& aClass,
nsIFactory* aFactory)
{
// Don't release the dying factory or service object until releasing
// the component manager monitor.
nsCOMPtr<nsIFactory> dyingFactory;
nsCOMPtr<nsISupports> dyingServiceObject;
{
SafeMutexAutoLock lock(mLock);
nsFactoryEntry* f = mFactories.Get(aClass);
if (!f || f->mFactory != aFactory)
return NS_ERROR_FACTORY_NOT_REGISTERED;
mFactories.Remove(aClass);
// This might leave a stale contractid -> factory mapping in
// place, so null out the factory entry (see
// nsFactoryEntry::GetFactory)
f->mFactory.swap(dyingFactory);
f->mServiceObject.swap(dyingServiceObject);
}
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::AutoRegister(nsIFile* aLocation)
{
XRE_AddManifestLocation(NS_COMPONENT_LOCATION, aLocation);
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::AutoUnregister(nsIFile* aLocation)
{
NS_ERROR("AutoUnregister not implemented.");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsComponentManagerImpl::RegisterFactoryLocation(const nsCID& aCID,
const char* aClassName,
const char* aContractID,
nsIFile* aFile,
const char* aLoaderStr,
const char* aType)
{
NS_ERROR("RegisterFactoryLocation not implemented.");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsComponentManagerImpl::UnregisterFactoryLocation(const nsCID& aCID,
nsIFile* aFile)
{
NS_ERROR("UnregisterFactoryLocation not implemented.");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsComponentManagerImpl::IsCIDRegistered(const nsCID & aClass,
bool *_retval)
{
*_retval = (nullptr != GetFactoryEntry(aClass));
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::IsContractIDRegistered(const char *aClass,
bool *_retval)
{
NS_ENSURE_ARG_POINTER(aClass);
nsFactoryEntry *entry = GetFactoryEntry(aClass, strlen(aClass));
if (entry)
*_retval = true;
else
*_retval = false;
return NS_OK;
}
static PLDHashOperator
EnumerateCIDHelper(const nsID& id, nsFactoryEntry* entry, void* closure)
{
nsCOMArray<nsISupports> *array = static_cast<nsCOMArray<nsISupports>*>(closure);
nsCOMPtr<nsISupportsID> wrapper = new nsSupportsIDImpl();
wrapper->SetData(&id);
array->AppendObject(wrapper);
return PL_DHASH_NEXT;
}
NS_IMETHODIMP
nsComponentManagerImpl::EnumerateCIDs(nsISimpleEnumerator **aEnumerator)
{
nsCOMArray<nsISupports> array;
mFactories.EnumerateRead(EnumerateCIDHelper, &array);
return NS_NewArrayEnumerator(aEnumerator, array);
}
static PLDHashOperator
EnumerateContractsHelper(const nsACString& contract, nsFactoryEntry* entry, void* closure)
{
nsTArray<nsCString>* array = static_cast<nsTArray<nsCString>*>(closure);
array->AppendElement(contract);
return PL_DHASH_NEXT;
}
NS_IMETHODIMP
nsComponentManagerImpl::EnumerateContractIDs(nsISimpleEnumerator **aEnumerator)
{
nsTArray<nsCString>* array = new nsTArray<nsCString>;
mContractIDs.EnumerateRead(EnumerateContractsHelper, array);
nsCOMPtr<nsIUTF8StringEnumerator> e;
nsresult rv = NS_NewAdoptingUTF8StringEnumerator(getter_AddRefs(e), array);
if (NS_FAILED(rv))
return rv;
return CallQueryInterface(e, aEnumerator);
}
NS_IMETHODIMP
nsComponentManagerImpl::CIDToContractID(const nsCID & aClass,
char **_retval)
{
NS_ERROR("CIDTOContractID not implemented");
return NS_ERROR_FACTORY_NOT_REGISTERED;
}
NS_IMETHODIMP
nsComponentManagerImpl::ContractIDToCID(const char *aContractID,
nsCID * *_retval)
{
{
SafeMutexAutoLock lock(mLock);
nsFactoryEntry* entry = mContractIDs.Get(nsDependentCString(aContractID));
if (entry) {
*_retval = (nsCID*) NS_Alloc(sizeof(nsCID));
**_retval = *entry->mCIDEntry->cid;
return NS_OK;
}
}
*_retval = nullptr;
return NS_ERROR_FACTORY_NOT_REGISTERED;
}
static size_t
SizeOfFactoriesEntryExcludingThis(nsIDHashKey::KeyType aKey,
nsFactoryEntry* const &aData,
MallocSizeOf aMallocSizeOf,
void* aUserArg)
{
return aData->SizeOfIncludingThis(aMallocSizeOf);
}
static size_t
SizeOfContractIDsEntryExcludingThis(nsCStringHashKey::KeyType aKey,
nsFactoryEntry* const &aData,
MallocSizeOf aMallocSizeOf,
void* aUserArg)
{
// We don't measure the nsFactoryEntry data because its owned by mFactories
// (which measures them in SizeOfFactoriesEntryExcludingThis).
return aKey.SizeOfExcludingThisMustBeUnshared(aMallocSizeOf);
}
size_t
nsComponentManagerImpl::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf)
{
size_t n = aMallocSizeOf(this);
n += mLoaderMap.SizeOfExcludingThis(nullptr, aMallocSizeOf);
n += mFactories.SizeOfExcludingThis(SizeOfFactoriesEntryExcludingThis, aMallocSizeOf);
n += mContractIDs.SizeOfExcludingThis(SizeOfContractIDsEntryExcludingThis, aMallocSizeOf);
n += sStaticModules->SizeOfIncludingThis(aMallocSizeOf);
n += sModuleLocations->SizeOfIncludingThis(aMallocSizeOf);
n += mKnownStaticModules.SizeOfExcludingThis(aMallocSizeOf);
n += mKnownModules.SizeOfExcludingThis(nullptr, aMallocSizeOf);
n += PL_SizeOfArenaPoolExcludingPool(&mArena, aMallocSizeOf);
n += mPendingServices.SizeOfExcludingThis(aMallocSizeOf);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mLoaderMap's keys and values
// - mMon
// - sStaticModules' entries
// - sModuleLocations' entries
// - mNativeModuleLoader
// - mKnownStaticModules' entries?
// - mKnownModules' keys and values?
return n;
}
////////////////////////////////////////////////////////////////////////////////
// nsFactoryEntry
////////////////////////////////////////////////////////////////////////////////
nsFactoryEntry::nsFactoryEntry(const mozilla::Module::CIDEntry* entry,
nsComponentManagerImpl::KnownModule* module)
: mCIDEntry(entry)
, mModule(module)
{
}
nsFactoryEntry::nsFactoryEntry(const nsCID& aCID, nsIFactory* factory)
: mCIDEntry(nullptr)
, mModule(nullptr)
, mFactory(factory)
{
mozilla::Module::CIDEntry* e = new mozilla::Module::CIDEntry();
nsCID* cid = new nsCID;
*cid = aCID;
e->cid = cid;
mCIDEntry = e;
}
nsFactoryEntry::~nsFactoryEntry()
{
// If this was a RegisterFactory entry, we own the CIDEntry/CID
if (!mModule) {
delete mCIDEntry->cid;
delete mCIDEntry;
}
}
already_AddRefed<nsIFactory>
nsFactoryEntry::GetFactory()
{
nsComponentManagerImpl::gComponentManager->mLock.AssertNotCurrentThreadOwns();
if (!mFactory) {
// RegisterFactory then UnregisterFactory can leave an entry in mContractIDs
// pointing to an unusable nsFactoryEntry.
if (!mModule)
return nullptr;
if (!mModule->Load())
return nullptr;
// Don't set mFactory directly, it needs to be locked
nsCOMPtr<nsIFactory> factory;
if (mModule->Module()->getFactoryProc) {
factory = mModule->Module()->getFactoryProc(*mModule->Module(),
*mCIDEntry);
}
else if (mCIDEntry->getFactoryProc) {
factory = mCIDEntry->getFactoryProc(*mModule->Module(), *mCIDEntry);
}
else {
NS_ASSERTION(mCIDEntry->constructorProc, "no getfactory or constructor");
factory = new mozilla::GenericFactory(mCIDEntry->constructorProc);
}
if (!factory)
return nullptr;
SafeMutexAutoLock lock(nsComponentManagerImpl::gComponentManager->mLock);
// Threads can race to set mFactory
if (!mFactory) {
factory.swap(mFactory);
}
}
nsCOMPtr<nsIFactory> factory = mFactory;
return factory.forget();
}
size_t
nsFactoryEntry::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf)
{
size_t n = aMallocSizeOf(this);
// Measurement of the following members may be added later if DMD finds it is
// worthwhile:
// - mCIDEntry;
// - mModule;
// - mFactory;
// - mServiceObject;
return n;
}
////////////////////////////////////////////////////////////////////////////////
// Static Access Functions
////////////////////////////////////////////////////////////////////////////////
nsresult
NS_GetComponentManager(nsIComponentManager* *result)
{
if (!nsComponentManagerImpl::gComponentManager)
return NS_ERROR_NOT_INITIALIZED;
NS_ADDREF(*result = nsComponentManagerImpl::gComponentManager);
return NS_OK;
}
nsresult
NS_GetServiceManager(nsIServiceManager* *result)
{
if (!nsComponentManagerImpl::gComponentManager)
return NS_ERROR_NOT_INITIALIZED;
NS_ADDREF(*result = nsComponentManagerImpl::gComponentManager);
return NS_OK;
}
nsresult
NS_GetComponentRegistrar(nsIComponentRegistrar* *result)
{
if (!nsComponentManagerImpl::gComponentManager)
return NS_ERROR_NOT_INITIALIZED;
NS_ADDREF(*result = nsComponentManagerImpl::gComponentManager);
return NS_OK;
}
EXPORT_XPCOM_API(nsresult)
XRE_AddStaticComponent(const mozilla::Module* aComponent)
{
nsComponentManagerImpl::InitializeStaticModules();
nsComponentManagerImpl::sStaticModules->AppendElement(aComponent);
if (nsComponentManagerImpl::gComponentManager &&
nsComponentManagerImpl::NORMAL == nsComponentManagerImpl::gComponentManager->mStatus)
nsComponentManagerImpl::gComponentManager->RegisterModule(aComponent, nullptr);
return NS_OK;
}
NS_IMETHODIMP
nsComponentManagerImpl::AddBootstrappedManifestLocation(nsIFile* aLocation)
{
nsString path;
nsresult rv = aLocation->GetPath(path);
if (NS_FAILED(rv))
return rv;
if (Substring(path, path.Length() - 4).Equals(NS_LITERAL_STRING(".xpi"))) {
return XRE_AddJarManifestLocation(NS_BOOTSTRAPPED_LOCATION, aLocation);
}
nsCOMPtr<nsIFile> manifest =
CloneAndAppend(aLocation, NS_LITERAL_CSTRING("chrome.manifest"));
return XRE_AddManifestLocation(NS_BOOTSTRAPPED_LOCATION, manifest);
}
NS_IMETHODIMP
nsComponentManagerImpl::RemoveBootstrappedManifestLocation(nsIFile* aLocation)
{
nsCOMPtr<nsIChromeRegistry> cr = mozilla::services::GetChromeRegistryService();
if (!cr)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIFile> manifest;
nsString path;
nsresult rv = aLocation->GetPath(path);
if (NS_FAILED(rv))
return rv;
nsComponentManagerImpl::ComponentLocation elem;
elem.type = NS_BOOTSTRAPPED_LOCATION;
if (Substring(path, path.Length() - 4).Equals(NS_LITERAL_STRING(".xpi"))) {
elem.location.Init(aLocation, "chrome.manifest");
} else {
nsCOMPtr<nsIFile> lf = CloneAndAppend(aLocation, NS_LITERAL_CSTRING("chrome.manifest"));
elem.location.Init(lf);
}
// Remove reference.
nsComponentManagerImpl::sModuleLocations->RemoveElement(elem, ComponentLocationComparator());
rv = cr->CheckForNewChrome();
return rv;
}
EXPORT_XPCOM_API(nsresult)
XRE_AddManifestLocation(NSLocationType aType, nsIFile* aLocation)
{
nsComponentManagerImpl::InitializeModuleLocations();
nsComponentManagerImpl::ComponentLocation* c =
nsComponentManagerImpl::sModuleLocations->AppendElement();
c->type = aType;
c->location.Init(aLocation);
if (nsComponentManagerImpl::gComponentManager &&
nsComponentManagerImpl::NORMAL == nsComponentManagerImpl::gComponentManager->mStatus)
nsComponentManagerImpl::gComponentManager->RegisterManifest(aType, c->location, false);
return NS_OK;
}
EXPORT_XPCOM_API(nsresult)
XRE_AddJarManifestLocation(NSLocationType aType, nsIFile* aLocation)
{
nsComponentManagerImpl::InitializeModuleLocations();
nsComponentManagerImpl::ComponentLocation* c =
nsComponentManagerImpl::sModuleLocations->AppendElement();
c->type = aType;
c->location.Init(aLocation, "chrome.manifest");
if (nsComponentManagerImpl::gComponentManager &&
nsComponentManagerImpl::NORMAL == nsComponentManagerImpl::gComponentManager->mStatus)
nsComponentManagerImpl::gComponentManager->RegisterManifest(aType, c->location, false);
return NS_OK;
}
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку