Ensure that PP_Instance values are unique within a plugin process in addition...

webkit/plugins/ppapi/plugin_module.h

 // Copyright (c) 2011 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_PLUGIN_MODULE_H_
 #define WEBKIT_PLUGINS_PPAPI_PLUGIN_MODULE_H_
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/native_library.h"
 #include "base/process.h"
 #include "base/ref_counted.h"
 #include "base/scoped_ptr.h"
 #include "base/weak_ptr.h"
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/ppb.h"
 #include "webkit/plugins/ppapi/plugin_delegate.h"
 
 class FilePath;
 class MessageLoop;
 struct PPB_Core;
 typedef void* NPIdentifier;
 
 namespace base {
@@ skipping 91 matching lines @@
   // releases us in its destructor.
   void InstanceCreated(PluginInstance* instance);
   void InstanceDeleted(PluginInstance* instance);
 
   scoped_refptr<CallbackTracker> GetCallbackTracker();
 
   // Called when running out of process and the plugin crashed. This will
   // release relevant resources and update all affected instances.
   void PluginCrashed();
 
+  // Reserves the given instance is unique within the plugin, checking for
+  // collisions. See PPB_Proxy_Private for more information.
+  //
+  // The setter will set the callback which is set up when the proxy
+  // initializes. The Reserve function will call the previously set callback if
+  // it exists to validate the ID. If the callback has not been set (such as
+  // for in-process plugins), the Reserve function will assume that the ID is
+  // usable and will return true.
+  void SetReserveInstanceIDCallback(
+      PP_Bool (*reserve)(PP_Module, PP_Instance));
+  bool ReserveInstanceID(PP_Instance instance);
+
  private:
   // Calls the InitializeModule entrypoint. The entrypoint must have been
   // set and the plugin must not be out of process (we don't maintain
   // entrypoints in that case).
   bool InitializeModule();
 
   PluginDelegate::ModuleLifetime* lifetime_delegate_;
 
   // Tracker for completion callbacks, used mainly to ensure that all callbacks
   // are properly aborted on module shutdown.
@@ skipping 21 matching lines @@
   EntryPoints entry_points_;
 
   // The name of the module.
   const std::string name_;
 
   // Non-owning pointers to all instances associated with this module. When
   // there are no more instances, this object should be deleted.
   typedef std::set<PluginInstance*> PluginInstanceSet;
   PluginInstanceSet instances_;
 
+  PP_Bool (*reserve_instance_id_)(PP_Module, PP_Instance);
+
   DISALLOW_COPY_AND_ASSIGN(PluginModule);
 };
 
 }  // namespace ppapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_PPAPI_PLUGIN_MODULE_H_