xpcom/components/nsNativeComponentLoader.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef nsNativeModuleLoader_h__
   7 #define nsNativeModuleLoader_h__
   8
   9 #include "nsISupports.h"
  10 #include "mozilla/ModuleLoader.h"
  11 #include "nsDataHashtable.h"
  12 #include "nsHashKeys.h"
  13 #include "mozilla/Module.h"
  14 #include "prlink.h"
  15
  16 class nsNativeModuleLoader;
  17
  18 namespace mozilla {
  19 template<>
  20 struct HasDangerousPublicDestructor<nsNativeModuleLoader>
  21 {
  22   static const bool value = true;
  23 };
  24 }
  25
  26 class nsNativeModuleLoader : public mozilla::ModuleLoader
  27 {
  28  public:
  29     NS_DECL_ISUPPORTS_INHERITED
  30
  31     nsNativeModuleLoader() {}
  32     ~nsNativeModuleLoader() {}
  33
  34     virtual const mozilla::Module* LoadModule(mozilla::FileLocation &aFile) MOZ_OVERRIDE;
  35
  36     nsresult Init();
  37
  38     void UnloadLibraries();
  39
  40  private:
  41     struct NativeLoadData
  42     {
  43         NativeLoadData()
  44             : module(nullptr)
  45             , library(nullptr)
  46         { }
  47
  48         const mozilla::Module* module;
  49         PRLibrary* library;
  50     };
  51
  52     static PLDHashOperator
  53     ReleaserFunc(nsIHashable* aHashedFile, NativeLoadData &aLoadData, void*);
  54
  55     static PLDHashOperator
  56     UnloaderFunc(nsIHashable* aHashedFile, NativeLoadData &aLoadData, void*);
  57
  58     nsDataHashtable<nsHashableHashKey, NativeLoadData> mLibraries;
  59 };
  60
  61 #endif /* nsNativeModuleLoader_h__ */