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// 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 PPAPI_PROXY_INTERFACE_PROXY_H_
#define PPAPI_PROXY_INTERFACE_PROXY_H_
#include "base/basictypes.h"
#include "ipc/ipc_channel.h"
#include "ipc/ipc_message.h"
#include "ppapi/c/pp_completion_callback.h"
#include "ppapi/c/pp_resource.h"
#include "ppapi/c/pp_var.h"
#include "ppapi/proxy/interface_id.h"
namespace pp {
namespace proxy {
class Dispatcher;
class InterfaceProxy : public IPC::Channel::Listener,
public IPC::Message::Sender {
public:
// Creates the given interface associated with the given dispatcher. The
// dispatcher manages our lifetime.
//
// The target interface pointer, when non-NULL, indicates that this is a
// target proxy (see dispatcher.h for a definition). In this case, the proxy
// will interpret this pointer to the actual implementation of the interface
// in the local process.
//
// If the target interface is NULL, this proxy will be a "source" interface.
InterfaceProxy(Dispatcher* dispatcher, const void* target_interface);
virtual ~InterfaceProxy();
// See dispatcher.h for definitions of source and target.
bool is_source_proxy() const { return !target_interface_; }
bool is_target_proxy() const { return !!target_interface_; }
// When this proxy is the "target" of the IPC communication (see
// dispatcher.h), this target_interface pointer will indicate the local
// side's interface pointer. This contains the functions that actually
// implement the proxied interface.
//
// This will be NULL when this proxy is a source proxy.
const void* target_interface() const { return target_interface_; }
Dispatcher* dispatcher() { return dispatcher_; }
// IPC::Message::Sender implementation.
virtual bool Send(IPC::Message* msg);
// Returns the local implementation of the interface that will proxy it to
// the remote side. This is used on the source side only (see dispatcher.h).
virtual const void* GetSourceInterface() const = 0;
// Returns the interface ID associated with this proxy. Implemented by each
// derived class to identify itself.
virtual InterfaceID GetInterfaceId() const = 0;
// Sub-classes must implement IPC::Channel::Listener which contains this:
//virtual void OnMessageReceived(const IPC::Message& msg);
protected:
uint32 SendCallback(PP_CompletionCallback callback);
PP_CompletionCallback ReceiveCallback(uint32 serialized_callback);
private:
Dispatcher* dispatcher_;
const void* target_interface_;
};
} // namespace proxy
} // namespace pp
#endif // PPAPI_PROXY_INTERFACE_PROXY_H_
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