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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /xpcom/components/nsComponentManager.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'xpcom/components/nsComponentManager.h')
-rw-r--r--xpcom/components/nsComponentManager.h363
1 files changed, 363 insertions, 0 deletions
diff --git a/xpcom/components/nsComponentManager.h b/xpcom/components/nsComponentManager.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef nsComponentManager_h__
+#define nsComponentManager_h__
+
+#include "nsXPCOM.h"
+
+#include "xpcom-private.h"
+#include "nsIComponentManager.h"
+#include "nsIComponentRegistrar.h"
+#include "nsIMemoryReporter.h"
+#include "nsIServiceManager.h"
+#include "nsIFile.h"
+#include "mozilla/Atomics.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/Module.h"
+#include "mozilla/ModuleLoader.h"
+#include "mozilla/Mutex.h"
+#include "nsXULAppAPI.h"
+#include "nsNativeModuleLoader.h"
+#include "nsIFactory.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsIInterfaceRequestorUtils.h"
+#include "PLDHashTable.h"
+#include "prtime.h"
+#include "nsCOMPtr.h"
+#include "nsAutoPtr.h"
+#include "nsWeakReference.h"
+#include "plarena.h"
+#include "nsCOMArray.h"
+#include "nsDataHashtable.h"
+#include "nsInterfaceHashtable.h"
+#include "nsClassHashtable.h"
+#include "nsTArray.h"
+
+#include "mozilla/Omnijar.h"
+#include "mozilla/Attributes.h"
+
+struct nsFactoryEntry;
+class nsIServiceManager;
+struct PRThread;
+
+#define NS_COMPONENTMANAGER_CID \
+{ /* 91775d60-d5dc-11d2-92fb-00e09805570f */ \
+ 0x91775d60, \
+ 0xd5dc, \
+ 0x11d2, \
+ {0x92, 0xfb, 0x00, 0xe0, 0x98, 0x05, 0x57, 0x0f} \
+}
+
+/* keys for registry use */
+extern const char xpcomKeyName[];
+extern const char xpcomComponentsKeyName[];
+extern const char lastModValueName[];
+extern const char fileSizeValueName[];
+extern const char nativeComponentType[];
+extern const char staticComponentType[];
+
+#ifdef DEBUG
+#define XPCOM_CHECK_PENDING_CIDS
+#endif
+////////////////////////////////////////////////////////////////////////////////
+
+extern const mozilla::Module kXPCOMModule;
+
+/**
+ * This is a wrapper around mozilla::Mutex which provides runtime
+ * checking for a deadlock where the same thread tries to lock a mutex while
+ * it is already locked. This checking is present in both debug and release
+ * builds.
+ */
+class SafeMutex
+{
+public:
+ explicit SafeMutex(const char* aName)
+ : mMutex(aName)
+ , mOwnerThread(nullptr)
+ {
+ }
+
+ ~SafeMutex() {}
+
+ void Lock()
+ {
+ AssertNotCurrentThreadOwns();
+ mMutex.Lock();
+ MOZ_ASSERT(mOwnerThread == nullptr);
+ mOwnerThread = PR_GetCurrentThread();
+ }
+
+ void Unlock()
+ {
+ MOZ_ASSERT(mOwnerThread == PR_GetCurrentThread());
+ mOwnerThread = nullptr;
+ mMutex.Unlock();
+ }
+
+ void AssertCurrentThreadOwns() const
+ {
+ // This method is a debug-only check
+ MOZ_ASSERT(mOwnerThread == PR_GetCurrentThread());
+ }
+
+ MOZ_NEVER_INLINE void AssertNotCurrentThreadOwns() const
+ {
+ // This method is a release-mode check
+ if (PR_GetCurrentThread() == mOwnerThread) {
+ MOZ_CRASH();
+ }
+ }
+
+private:
+ mozilla::Mutex mMutex;
+ mozilla::Atomic<PRThread*, mozilla::Relaxed> mOwnerThread;
+};
+
+typedef mozilla::BaseAutoLock<SafeMutex> SafeMutexAutoLock;
+typedef mozilla::BaseAutoUnlock<SafeMutex> SafeMutexAutoUnlock;
+
+class nsComponentManagerImpl final
+ : public nsIComponentManager
+ , public nsIServiceManager
+ , public nsSupportsWeakReference
+ , public nsIComponentRegistrar
+ , public nsIInterfaceRequestor
+ , public nsIMemoryReporter
+{
+public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_NSIINTERFACEREQUESTOR
+ NS_DECL_NSICOMPONENTMANAGER
+ NS_DECL_NSICOMPONENTREGISTRAR
+ NS_DECL_NSIMEMORYREPORTER
+
+ static nsresult Create(nsISupports* aOuter, REFNSIID aIID, void** aResult);
+
+ nsresult RegistryLocationForFile(nsIFile* aFile,
+ nsCString& aResult);
+ nsresult FileForRegistryLocation(const nsCString& aLocation,
+ nsIFile** aSpec);
+
+ NS_DECL_NSISERVICEMANAGER
+
+ // nsComponentManagerImpl methods:
+ nsComponentManagerImpl();
+
+ static nsComponentManagerImpl* gComponentManager;
+ nsresult Init();
+
+ nsresult Shutdown(void);
+
+ nsresult FreeServices();
+
+ already_AddRefed<mozilla::ModuleLoader> LoaderForExtension(const nsACString& aExt);
+ nsInterfaceHashtable<nsCStringHashKey, mozilla::ModuleLoader> mLoaderMap;
+
+ already_AddRefed<nsIFactory> FindFactory(const nsCID& aClass);
+ already_AddRefed<nsIFactory> FindFactory(const char* aContractID,
+ uint32_t aContractIDLen);
+
+ already_AddRefed<nsIFactory> LoadFactory(nsFactoryEntry* aEntry);
+
+ nsFactoryEntry* GetFactoryEntry(const char* aContractID,
+ uint32_t aContractIDLen);
+ nsFactoryEntry* GetFactoryEntry(const nsCID& aClass);
+
+ nsDataHashtable<nsIDHashKey, nsFactoryEntry*> mFactories;
+ nsDataHashtable<nsCStringHashKey, nsFactoryEntry*> mContractIDs;
+
+ SafeMutex mLock;
+
+ static void InitializeStaticModules();
+ static void InitializeModuleLocations();
+
+ struct ComponentLocation
+ {
+ NSLocationType type;
+ mozilla::FileLocation location;
+ };
+
+ class ComponentLocationComparator
+ {
+ public:
+ bool Equals(const ComponentLocation& aA, const ComponentLocation& aB) const
+ {
+ return (aA.type == aB.type && aA.location.Equals(aB.location));
+ }
+ };
+
+ static nsTArray<const mozilla::Module*>* sStaticModules;
+ static nsTArray<ComponentLocation>* sModuleLocations;
+
+ nsNativeModuleLoader mNativeModuleLoader;
+
+ class KnownModule
+ {
+ public:
+ /**
+ * Static or binary module.
+ */
+ KnownModule(const mozilla::Module* aModule, mozilla::FileLocation& aFile)
+ : mModule(aModule)
+ , mFile(aFile)
+ , mLoaded(false)
+ , mFailed(false)
+ {
+ }
+
+ explicit KnownModule(const mozilla::Module* aModule)
+ : mModule(aModule)
+ , mLoaded(false)
+ , mFailed(false)
+ {
+ }
+
+ explicit KnownModule(mozilla::FileLocation& aFile)
+ : mModule(nullptr)
+ , mFile(aFile)
+ , mLoader(nullptr)
+ , mLoaded(false)
+ , mFailed(false)
+ {
+ }
+
+ ~KnownModule()
+ {
+ if (mLoaded && mModule->unloadProc) {
+ mModule->unloadProc();
+ }
+ }
+
+ bool EnsureLoader();
+ bool Load();
+
+ const mozilla::Module* Module() const { return mModule; }
+
+ /**
+ * For error logging, get a description of this module, either the
+ * file path, or <static module>.
+ */
+ nsCString Description() const;
+
+ private:
+ const mozilla::Module* mModule;
+ mozilla::FileLocation mFile;
+ nsCOMPtr<mozilla::ModuleLoader> mLoader;
+ bool mLoaded;
+ bool mFailed;
+ };
+
+ // The KnownModule is kept alive by these members, it is
+ // referenced by pointer from the factory entries.
+ nsTArray<nsAutoPtr<KnownModule>> mKnownStaticModules;
+ // The key is the URI string of the module
+ nsClassHashtable<nsCStringHashKey, KnownModule> mKnownModules;
+
+ // Mutex not held
+ void RegisterModule(const mozilla::Module* aModule,
+ mozilla::FileLocation* aFile);
+
+
+ // Mutex held
+ void RegisterCIDEntryLocked(const mozilla::Module::CIDEntry* aEntry,
+ KnownModule* aModule);
+ void RegisterContractIDLocked(const mozilla::Module::ContractIDEntry* aEntry);
+
+ // Mutex not held
+ void RegisterManifest(NSLocationType aType, mozilla::FileLocation& aFile,
+ bool aChromeOnly);
+
+ struct ManifestProcessingContext
+ {
+ ManifestProcessingContext(NSLocationType aType,
+ mozilla::FileLocation& aFile, bool aChromeOnly)
+ : mType(aType)
+ , mFile(aFile)
+ , mChromeOnly(aChromeOnly)
+ {
+ }
+
+ ~ManifestProcessingContext() {}
+
+ NSLocationType mType;
+ mozilla::FileLocation mFile;
+ bool mChromeOnly;
+ };
+
+ void ManifestManifest(ManifestProcessingContext& aCx, int aLineNo,
+ char* const* aArgv);
+ void ManifestBinaryComponent(ManifestProcessingContext& aCx, int aLineNo,
+ char* const* aArgv);
+ void ManifestXPT(ManifestProcessingContext& aCx, int aLineNo,
+ char* const* aArgv);
+ void ManifestComponent(ManifestProcessingContext& aCx, int aLineNo,
+ char* const* aArgv);
+ void ManifestContract(ManifestProcessingContext& aCx, int aLineNo,
+ char* const* aArgv);
+ void ManifestCategory(ManifestProcessingContext& aCx, int aLineNo,
+ char* const* aArgv);
+
+ void RereadChromeManifests(bool aChromeOnly = true);
+
+ // Shutdown
+ enum
+ {
+ NOT_INITIALIZED,
+ NORMAL,
+ SHUTDOWN_IN_PROGRESS,
+ SHUTDOWN_COMPLETE
+ } mStatus;
+
+ PLArenaPool mArena;
+
+ struct PendingServiceInfo
+ {
+ const nsCID* cid;
+ PRThread* thread;
+ };
+
+ inline PendingServiceInfo* AddPendingService(const nsCID& aServiceCID,
+ PRThread* aThread);
+ inline void RemovePendingService(const nsCID& aServiceCID);
+ inline PRThread* GetPendingServiceThread(const nsCID& aServiceCID) const;
+
+ nsTArray<PendingServiceInfo> mPendingServices;
+
+ size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const;
+
+private:
+ ~nsComponentManagerImpl();
+};
+
+
+#define NS_MAX_FILENAME_LEN 1024
+
+#define NS_ERROR_IS_DIR NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_XPCOM, 24)
+
+struct nsFactoryEntry
+{
+ nsFactoryEntry(const mozilla::Module::CIDEntry* aEntry,
+ nsComponentManagerImpl::KnownModule* aModule);
+
+ // nsIComponentRegistrar.registerFactory support
+ nsFactoryEntry(const nsCID& aClass, nsIFactory* aFactory);
+
+ ~nsFactoryEntry();
+
+ already_AddRefed<nsIFactory> GetFactory();
+
+ size_t SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf);
+
+ const mozilla::Module::CIDEntry* mCIDEntry;
+ nsComponentManagerImpl::KnownModule* mModule;
+
+ nsCOMPtr<nsIFactory> mFactory;
+ nsCOMPtr<nsISupports> mServiceObject;
+};
+
+#endif // nsComponentManager_h__