New Pepper API implementation.

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 <set>
+
+#include "base/atomic_sequence_num.h"
+#include "base/basictypes.h"
+#include "base/lock.h"
+#include "base/ref_counted.h"
+#include "base/singleton.h"
+
+typedef struct _pp_Resource PP_Resource;
+
+namespace pepper {
+
+class Resource;
+
+// 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();
+
+  // The returned pointer will be NULL if there is no resource.
+  Resource* GetResource(PP_Resource res) const;
+
+  // Adds the given resource to the tracker and assigns it a resource ID. The
+  // assigned resource ID will be returned.
+  void AddResource(Resource* resource);
+
+  void DeleteResource(Resource* resource);
+
+ private:
+  friend struct DefaultSingletonTraits<ResourceTracker>;
+
+  ResourceTracker();
+  ~ResourceTracker();
+
+  // Hold this lock when accessing this object's members.
+  mutable Lock lock_;
+
+  typedef std::set<Resource*> ResourceSet;
+  ResourceSet live_resources_;
+
+  DISALLOW_COPY_AND_ASSIGN(ResourceTracker);
+};
+
+}  // namespace pepper
+
+#endif  // WEBKIT_GLUE_PLUGINS_PEPPER_RESOURCE_TRACKER_H_