Move webkit/plugins/ppapi to content/renderer/pepper.

webkit/plugins/ppapi/host_var_tracker.h

-// Copyright (c) 2012 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_PLUGINS_PPAPI_HOST_VAR_TRACKER_H_
-#define WEBKIT_PLUGINS_PPAPI_HOST_VAR_TRACKER_H_
-
-#include <map>
-
-#include "base/basictypes.h"
-#include "base/compiler_specific.h"
-#include "base/containers/hash_tables.h"
-#include "base/gtest_prod_util.h"
-#include "base/memory/linked_ptr.h"
-#include "base/memory/ref_counted.h"
-#include "ppapi/c/pp_instance.h"
-#include "ppapi/shared_impl/host_resource.h"
-#include "ppapi/shared_impl/resource_tracker.h"
-#include "ppapi/shared_impl/var_tracker.h"
-#include "webkit/plugins/webkit_plugins_export.h"
-
-typedef struct NPObject NPObject;
-
-namespace ppapi {
-class ArrayBufferVar;
-class NPObjectVar;
-class Var;
-}
-
-namespace webkit {
-namespace ppapi {
-
-// Adds NPObject var tracking to the standard PPAPI VarTracker for use in the
-// renderer.
-class HostVarTracker : public ::ppapi::VarTracker {
- public:
-  HostVarTracker();
-  virtual ~HostVarTracker();
-
-  // Tracks all live NPObjectVar. This is so we can map between instance +
-  // NPObject and get the NPObjectVar corresponding to it. This Add/Remove
-  // function is called by the NPObjectVar when it is created and
-  // destroyed.
-  void AddNPObjectVar(::ppapi::NPObjectVar* object_var);
-  void RemoveNPObjectVar(::ppapi::NPObjectVar* object_var);
-
-  // Looks up a previously registered NPObjectVar for the given NPObject and
-  // instance. Returns NULL if there is no NPObjectVar corresponding to the
-  // given NPObject for the given instance. See AddNPObjectVar above.
-  ::ppapi::NPObjectVar* NPObjectVarForNPObject(PP_Instance instance,
-                                               NPObject* np_object);
-
-  // Returns the number of NPObjectVar's associated with the given instance.
-  // Returns 0 if the instance isn't known.
-  WEBKIT_PLUGINS_EXPORT int GetLiveNPObjectVarsForInstance(
-      PP_Instance instance) const;
-
-  // VarTracker public implementation.
-  virtual void DidDeleteInstance(PP_Instance instance) OVERRIDE;
-
-  virtual int TrackSharedMemoryHandle(PP_Instance instance,
-                                      base::SharedMemoryHandle file,
-                                      uint32 size_in_bytes) OVERRIDE;
-  virtual bool StopTrackingSharedMemoryHandle(int id,
-                                              PP_Instance instance,
-                                              base::SharedMemoryHandle* handle,
-                                              uint32* size_in_bytes) OVERRIDE;
-
- private:
-  // VarTracker private implementation.
-  virtual ::ppapi::ArrayBufferVar* CreateArrayBuffer(
-      uint32 size_in_bytes) OVERRIDE;
-  virtual ::ppapi::ArrayBufferVar* CreateShmArrayBuffer(
-      uint32 size_in_bytes, base::SharedMemoryHandle handle) OVERRIDE;
-
-  // Clear the reference count of the given object and remove it from
-  // live_vars_.
-  void ForceReleaseNPObject(::ppapi::NPObjectVar* object_var);
-
-  typedef std::map<NPObject*, ::ppapi::NPObjectVar*>
-      NPObjectToNPObjectVarMap;
-
-  // Lists all known NPObjects, first indexed by the corresponding instance,
-  // then by the NPObject*. This allows us to look up an NPObjectVar given
-  // these two pieces of information.
-  //
-  // The instance map is lazily managed, so we'll add the
-  // NPObjectToNPObjectVarMap lazily when the first NPObject var is created,
-  // and delete it when it's empty.
-  typedef std::map<PP_Instance, linked_ptr<NPObjectToNPObjectVarMap> >
-      InstanceMap;
-  InstanceMap instance_map_;
-
-  // Tracks all shared memory handles used for transmitting array buffers.
-  struct SharedMemoryMapEntry {
-    PP_Instance instance;
-    base::SharedMemoryHandle handle;
-    uint32 size_in_bytes;
-  };
-  typedef std::map<int, SharedMemoryMapEntry> SharedMemoryMap;
-  SharedMemoryMap shared_memory_map_;
-  uint32_t last_shared_memory_map_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(HostVarTracker);
-};
-
-}  // namespace ppapi
-}  // namespace webkit
-
-#endif  // WEBKIT_PLUGINS_PPAPI_HOST_VAR_TRACKER_H_