зеркало из https://github.com/mozilla/gecko-dev.git
364 строки
9.7 KiB
C++
364 строки
9.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsComponentManager_h__
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#define nsComponentManager_h__
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#include "nsXPCOM.h"
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#include "xpcom-private.h"
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#include "nsIComponentManager.h"
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#include "nsIComponentRegistrar.h"
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#include "nsIMemoryReporter.h"
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#include "nsIServiceManager.h"
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#include "nsIFile.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/Module.h"
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#include "mozilla/ModuleLoader.h"
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#include "mozilla/Mutex.h"
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#include "nsXULAppAPI.h"
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#include "nsNativeModuleLoader.h"
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#include "nsIFactory.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "pldhash.h"
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#include "prtime.h"
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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#include "nsWeakReference.h"
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#include "plarena.h"
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#include "nsCOMArray.h"
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#include "nsDataHashtable.h"
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#include "nsInterfaceHashtable.h"
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#include "nsClassHashtable.h"
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#include "nsTArray.h"
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#include "mozilla/Omnijar.h"
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#include "mozilla/Attributes.h"
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struct nsFactoryEntry;
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class nsIServiceManager;
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struct PRThread;
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#define NS_COMPONENTMANAGER_CID \
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{ /* 91775d60-d5dc-11d2-92fb-00e09805570f */ \
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0x91775d60, \
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0xd5dc, \
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0x11d2, \
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{0x92, 0xfb, 0x00, 0xe0, 0x98, 0x05, 0x57, 0x0f} \
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}
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/* keys for registry use */
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extern const char xpcomKeyName[];
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extern const char xpcomComponentsKeyName[];
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extern const char lastModValueName[];
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extern const char fileSizeValueName[];
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extern const char nativeComponentType[];
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extern const char staticComponentType[];
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#ifdef DEBUG
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#define XPCOM_CHECK_PENDING_CIDS
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#endif
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////////////////////////////////////////////////////////////////////////////////
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extern const mozilla::Module kXPCOMModule;
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/**
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* This is a wrapper around mozilla::Mutex which provides runtime
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* checking for a deadlock where the same thread tries to lock a mutex while
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* it is already locked. This checking is present in both debug and release
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* builds.
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*/
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class SafeMutex
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{
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public:
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SafeMutex(const char* aName)
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: mMutex(aName)
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, mOwnerThread(nullptr)
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{
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}
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~SafeMutex() {}
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void Lock()
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{
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AssertNotCurrentThreadOwns();
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mMutex.Lock();
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MOZ_ASSERT(mOwnerThread == nullptr);
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mOwnerThread = PR_GetCurrentThread();
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}
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void Unlock()
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{
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MOZ_ASSERT(mOwnerThread == PR_GetCurrentThread());
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mOwnerThread = nullptr;
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mMutex.Unlock();
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}
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void AssertCurrentThreadOwns() const
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{
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// This method is a debug-only check
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MOZ_ASSERT(mOwnerThread == PR_GetCurrentThread());
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}
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MOZ_NEVER_INLINE void AssertNotCurrentThreadOwns() const
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{
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// This method is a release-mode check
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if (PR_GetCurrentThread() == mOwnerThread) {
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MOZ_CRASH();
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}
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}
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private:
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mozilla::Mutex mMutex;
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volatile PRThread* mOwnerThread;
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};
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typedef mozilla::BaseAutoLock<SafeMutex> SafeMutexAutoLock;
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typedef mozilla::BaseAutoUnlock<SafeMutex> SafeMutexAutoUnlock;
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class nsComponentManagerImpl MOZ_FINAL
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: public nsIComponentManager
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, public nsIServiceManager
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, public nsSupportsWeakReference
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, public nsIComponentRegistrar
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, public nsIInterfaceRequestor
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, public nsIMemoryReporter
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{
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIINTERFACEREQUESTOR
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NS_DECL_NSICOMPONENTMANAGER
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NS_DECL_NSICOMPONENTREGISTRAR
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NS_DECL_NSIMEMORYREPORTER
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static nsresult Create(nsISupports* aOuter, REFNSIID aIID, void** aResult);
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nsresult RegistryLocationForFile(nsIFile* aFile,
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nsCString& aResult);
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nsresult FileForRegistryLocation(const nsCString& aLocation,
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nsIFile** aSpec);
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NS_DECL_NSISERVICEMANAGER
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// nsComponentManagerImpl methods:
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nsComponentManagerImpl();
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static nsComponentManagerImpl* gComponentManager;
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nsresult Init();
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nsresult Shutdown(void);
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nsresult FreeServices();
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already_AddRefed<mozilla::ModuleLoader> LoaderForExtension(const nsACString& aExt);
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nsInterfaceHashtable<nsCStringHashKey, mozilla::ModuleLoader> mLoaderMap;
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already_AddRefed<nsIFactory> FindFactory(const nsCID& aClass);
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already_AddRefed<nsIFactory> FindFactory(const char* aContractID,
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uint32_t aContractIDLen);
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already_AddRefed<nsIFactory> LoadFactory(nsFactoryEntry* aEntry);
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nsFactoryEntry* GetFactoryEntry(const char* aContractID,
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uint32_t aContractIDLen);
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nsFactoryEntry* GetFactoryEntry(const nsCID& aClass);
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nsDataHashtable<nsIDHashKey, nsFactoryEntry*> mFactories;
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nsDataHashtable<nsCStringHashKey, nsFactoryEntry*> mContractIDs;
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SafeMutex mLock;
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static void InitializeStaticModules();
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static void InitializeModuleLocations();
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struct ComponentLocation
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{
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NSLocationType type;
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mozilla::FileLocation location;
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};
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class ComponentLocationComparator
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{
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public:
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bool Equals(const ComponentLocation& aA,
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const ComponentLocation& aB) const
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{
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return (aA.type == aB.type && aA.location.Equals(aB.location));
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}
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};
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static nsTArray<const mozilla::Module*>* sStaticModules;
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static nsTArray<ComponentLocation>* sModuleLocations;
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nsNativeModuleLoader mNativeModuleLoader;
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class KnownModule
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{
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public:
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/**
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* Static or binary module.
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*/
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KnownModule(const mozilla::Module* aModule, mozilla::FileLocation& aFile)
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: mModule(aModule)
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, mFile(aFile)
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, mLoaded(false)
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, mFailed(false)
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{
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}
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KnownModule(const mozilla::Module* aModule)
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: mModule(aModule)
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, mLoaded(false)
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, mFailed(false)
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{
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}
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KnownModule(mozilla::FileLocation& aFile)
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: mModule(nullptr)
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, mFile(aFile)
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, mLoader(nullptr)
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, mLoaded(false)
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, mFailed(false)
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{
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}
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~KnownModule()
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{
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if (mLoaded && mModule->unloadProc) {
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mModule->unloadProc();
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}
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}
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bool EnsureLoader();
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bool Load();
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const mozilla::Module* Module() const { return mModule; }
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/**
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* For error logging, get a description of this module, either the
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* file path, or <static module>.
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*/
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nsCString Description() const;
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private:
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const mozilla::Module* mModule;
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mozilla::FileLocation mFile;
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nsCOMPtr<mozilla::ModuleLoader> mLoader;
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bool mLoaded;
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bool mFailed;
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};
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// The KnownModule is kept alive by these members, it is
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// referenced by pointer from the factory entries.
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nsTArray<nsAutoPtr<KnownModule>> mKnownStaticModules;
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// The key is the URI string of the module
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nsClassHashtable<nsCStringHashKey, KnownModule> mKnownModules;
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// Mutex not held
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void RegisterModule(const mozilla::Module* aModule,
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mozilla::FileLocation* aFile);
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// Mutex held
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void RegisterCIDEntryLocked(const mozilla::Module::CIDEntry* aEntry,
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KnownModule* aModule);
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void RegisterContractIDLocked(const mozilla::Module::ContractIDEntry* aEntry);
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// Mutex not held
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void RegisterManifest(NSLocationType aType, mozilla::FileLocation& aFile,
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bool aChromeOnly);
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struct ManifestProcessingContext
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{
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ManifestProcessingContext(NSLocationType aType,
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mozilla::FileLocation& aFile,
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bool aChromeOnly)
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: mType(aType)
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, mFile(aFile)
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, mChromeOnly(aChromeOnly)
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{
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}
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~ManifestProcessingContext() {}
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NSLocationType mType;
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mozilla::FileLocation mFile;
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bool mChromeOnly;
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};
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void ManifestManifest(ManifestProcessingContext& aCx, int aLineNo,
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char* const* aArgv);
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void ManifestBinaryComponent(ManifestProcessingContext& aCx, int aLineNo,
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char* const* aArgv);
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void ManifestXPT(ManifestProcessingContext& aCx, int aLineNo,
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char* const* aArgv);
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void ManifestComponent(ManifestProcessingContext& aCx, int aLineNo,
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char* const* aArgv);
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void ManifestContract(ManifestProcessingContext& aCx, int aLineNo,
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char* const* aArgv);
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void ManifestCategory(ManifestProcessingContext& aCx, int aLineNo,
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char* const* aArgv);
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void RereadChromeManifests(bool aChromeOnly = true);
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// Shutdown
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enum
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{
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NOT_INITIALIZED,
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NORMAL,
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SHUTDOWN_IN_PROGRESS,
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SHUTDOWN_COMPLETE
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} mStatus;
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PLArenaPool mArena;
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struct PendingServiceInfo
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{
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const nsCID* cid;
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PRThread* thread;
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};
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inline PendingServiceInfo* AddPendingService(const nsCID& aServiceCID,
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PRThread* aThread);
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inline void RemovePendingService(const nsCID& aServiceCID);
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inline PRThread* GetPendingServiceThread(const nsCID& aServiceCID) const;
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nsTArray<PendingServiceInfo> mPendingServices;
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf);
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private:
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~nsComponentManagerImpl();
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};
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#define NS_MAX_FILENAME_LEN 1024
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#define NS_ERROR_IS_DIR NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_XPCOM, 24)
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struct nsFactoryEntry
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{
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nsFactoryEntry(const mozilla::Module::CIDEntry* aEntry,
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nsComponentManagerImpl::KnownModule* aModule);
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// nsIComponentRegistrar.registerFactory support
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nsFactoryEntry(const nsCID& aClass, nsIFactory* aFactory);
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~nsFactoryEntry();
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already_AddRefed<nsIFactory> GetFactory();
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size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf);
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const mozilla::Module::CIDEntry* mCIDEntry;
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nsComponentManagerImpl::KnownModule* mModule;
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nsCOMPtr<nsIFactory> mFactory;
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nsCOMPtr<nsISupports> mServiceObject;
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};
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#endif // nsComponentManager_h__
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