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

webkit/plugins/ppapi/*. This renamed the files and interface implementation
classes from foo.cc/Foo to ppb_foo_impl/PPB_Foo_Impl to match the proxy
ppb_foo_proxy/PPB_Foo_Proxy.

This moves plugin_switches.* from webkit/glue/plugins to webkit/plugins.
Review URL: http://codereview.chromium.org/5828003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@69424 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 149 insertions, 0 deletions

diff --git a/webkit/plugins/ppapi/resource_tracker.h b/webkit/plugins/ppapi/resource_tracker.h
new file mode 100644
index 0000000..7a5e002
--- /dev/null
+++ b/webkit/plugins/ppapi/resource_tracker.h
@@ -0,0 +1,149 @@
+// 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_PLUGINS_PPAPI_RESOURCE_TRACKER_H_
+#define WEBKIT_PLUGINS_PPAPI_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 webkit {
+namespace ppapi {
+
+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 ppapi
+}  // namespace webkit
+
+#endif  // WEBKIT_PLUGINS_PPAPI_RESOURCE_TRACKER_H_