Move the Pepper implementation from webkit/glue/plugins/pepper_* to...

webkit/glue/plugins/pepper_resource_tracker.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef WEBKIT_GLUE_PLUGINS_PEPPER_RESOURCE_TRACKER_H_
-#define WEBKIT_GLUE_PLUGINS_PEPPER_RESOURCE_TRACKER_H_
-
-#include <map>
-#include <utility>
-
-#include "base/basictypes.h"
-#include "base/gtest_prod_util.h"
-#include "base/hash_tables.h"
-#include "base/ref_counted.h"
-#include "ppapi/c/pp_instance.h"
-#include "ppapi/c/pp_module.h"
-#include "ppapi/c/pp_resource.h"
-
-namespace base {
-template <typename T> struct DefaultLazyInstanceTraits;
-}
-
-namespace pepper {
-
-class PluginInstance;
-class PluginModule;
-class Resource;
-class ResourceTrackerTest;
-
-// This class maintains a global list of all live pepper resources. It allows
-// us to check resource ID validity and to map them to a specific module.
-//
-// This object is threadsafe.
-class ResourceTracker {
- public:
-  // Returns the pointer to the singleton object.
-  static ResourceTracker* Get();
-
-  // PP_Resources --------------------------------------------------------------
-
-  // The returned pointer will be NULL if there is no resource. Note that this
-  // return value is a scoped_refptr so that we ensure the resource is valid
-  // from the point of the lookup to the point that the calling code needs it.
-  // Otherwise, the plugin could Release() the resource on another thread and
-  // the object will get deleted out from under us.
-  scoped_refptr<Resource> GetResource(PP_Resource res) const;
-
-  // Increment resource's plugin refcount. See ResourceAndRefCount comments
-  // below.
-  bool AddRefResource(PP_Resource res);
-  bool UnrefResource(PP_Resource res);
-
-  // Forces the plugin refcount of the given resource to 0. This can be used to
-  // delete an object the plugin has leaked or whose lifetime is otherwise
-  // exceeded.
-  //
-  // Note that this may not necessarily delete the resource object since the
-  // regular refcount is maintained separately from the plugin refcount and
-  // random components in the Pepper implementation could still have
-  // references to it.
-  void ForceDeletePluginResourceRefs(PP_Resource res);
-
-  // Returns the number of resources associated with this module.
-  //
-  // This is slow, use only for testing.
-  uint32 GetLiveObjectsForModule(PluginModule* module) const;
-
-  // PP_Modules ----------------------------------------------------------------
-
-  // Adds a new plugin module to the list of tracked module, and returns a new
-  // module handle to identify it.
-  PP_Module AddModule(PluginModule* module);
-
-  // Called when a plugin modulde was deleted and should no longer be tracked.
-  // The given handle should be one generated by AddModule.
-  void ModuleDeleted(PP_Module module);
-
-  // Returns a pointer to the plugin modulde object associated with the given
-  // modulde handle. The return value will be NULL if the handle is invalid.
-  PluginModule* GetModule(PP_Module module);
-
-  // PP_Instances --------------------------------------------------------------
-
-  // Adds a new plugin instance to the list of tracked instances, and returns a
-  // new instance handle to identify it.
-  PP_Instance AddInstance(PluginInstance* instance);
-
-  // Called when a plugin instance was deleted and should no longer be tracked.
-  // The given handle should be one generated by AddInstance.
-  void InstanceDeleted(PP_Instance instance);
-
-  // Returns a pointer to the plugin instance object associated with the given
-  // instance handle. The return value will be NULL if the handle is invalid.
-  PluginInstance* GetInstance(PP_Instance instance);
-
- private:
-  friend struct base::DefaultLazyInstanceTraits<ResourceTracker>;
-  friend class Resource;
-  friend class ResourceTrackerTest;
-
-  // Prohibit creation other then by the Singleton class.
-  ResourceTracker();
-  ~ResourceTracker();
-
-  // Adds the given resource to the tracker and assigns it a resource ID and
-  // refcount of 1. The assigned resource ID will be returned. Used only by the
-  // Resource class.
-  PP_Resource AddResource(Resource* resource);
-
-  // Overrides the singleton object. This is used for tests which want to
-  // specify their own tracker (otherwise, you can get cross-talk between
-  // tests since the data will live into the subsequent tests).
-  static void SetSingletonOverride(ResourceTracker* tracker);
-  static void ClearSingletonOverride();
-
-  // See SetSingletonOverride above.
-  static ResourceTracker* singleton_override_;
-
-  // Last assigned resource ID.
-  PP_Resource last_id_;
-
-  // For each PP_Resource, keep the Resource* (as refptr) and plugin use count.
-  // This use count is different then Resource's RefCount, and is manipulated
-  // using this RefResource/UnrefResource. When it drops to zero, we just remove
-  // the resource from this resource tracker, but the resource object will be
-  // alive so long as some scoped_refptr still holds it's reference. This
-  // prevents plugins from forcing destruction of Resource objects.
-  typedef std::pair<scoped_refptr<Resource>, size_t> ResourceAndRefCount;
-  typedef base::hash_map<PP_Resource, ResourceAndRefCount> ResourceMap;
-  ResourceMap live_resources_;
-
-  // Tracks all live instances. The pointers are non-owning, the PluginInstance
-  // destructor will notify us when the instance is deleted.
-  typedef std::map<PP_Instance, PluginInstance*> InstanceMap;
-  InstanceMap instance_map_;
-
-  // Tracks all live modules. The pointers are non-owning, the PluginModule
-  // destructor will notify us when the module is deleted.
-  typedef std::map<PP_Module, PluginModule*> ModuleMap;
-  ModuleMap module_map_;
-
-  DISALLOW_COPY_AND_ASSIGN(ResourceTracker);
-};
-
-}  // namespace pepper
-
-#endif  // WEBKIT_GLUE_PLUGINS_PEPPER_RESOURCE_TRACKER_H_