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// 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 PPAPI_PROXY_PLUGIN_VAR_SERIALIZATION_RULES_H_
#define PPAPI_PROXY_PLUGIN_VAR_SERIALIZATION_RULES_H_
#include "base/basictypes.h"
#include "base/memory/weak_ptr.h"
#include "ppapi/proxy/var_serialization_rules.h"
namespace ppapi {
namespace proxy {
class PluginDispatcher;
class PluginVarTracker;
// Implementation of the VarSerializationRules interface for the plugin.
class PluginVarSerializationRules : public VarSerializationRules {
public:
// This class will use the given non-owning pointer to the var tracker to
// handle object refcounting and string conversion.
explicit PluginVarSerializationRules(
const base::WeakPtr<PluginDispatcher>& dispatcher);
~PluginVarSerializationRules();
// VarSerialization implementation.
virtual PP_Var SendCallerOwned(const PP_Var& var);
virtual PP_Var BeginReceiveCallerOwned(const PP_Var& var);
virtual void EndReceiveCallerOwned(const PP_Var& var);
virtual PP_Var ReceivePassRef(const PP_Var& var);
virtual PP_Var BeginSendPassRef(const PP_Var& var);
virtual void EndSendPassRef(const PP_Var& var);
virtual void ReleaseObjectRef(const PP_Var& var);
private:
PluginVarTracker* var_tracker_;
// In most cases, |dispatcher_| won't be NULL, but you should always check
// before using it.
// One scenario that it becomes NULL: A SerializedVar holds a ref to this
// object, and a sync message is issued. While waiting for the reply to the
// sync message, some incoming message causes the dispatcher to be destroyed.
// If that happens, we may leak references to object vars. Considering that
// scripting has been deprecated, this may not be a big issue.
base::WeakPtr<PluginDispatcher> dispatcher_;
DISALLOW_COPY_AND_ASSIGN(PluginVarSerializationRules);
};
} // namespace proxy
} // namespace ppapi
#endif // PPAPI_PROXY_PLUGIN_VAR_SERIALIZATION_RULES_H_
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