Add m-esr52 at 52.6.0

1 files changed, 363 insertions, 0 deletions

diff --git a/xpcom/components/nsComponentManager.h b/xpcom/components/nsComponentManager.h
new file mode 100644
index 000000000..f0e0f684a
--- /dev/null
+++ b/xpcom/components/nsComponentManager.h
@@ -0,0 +1,363 @@
+/* -*- 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__