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// 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 PPAPI_PROXY_PROXY_CHANNEL_H_
#define PPAPI_PROXY_PROXY_CHANNEL_H_
#include "base/memory/scoped_ptr.h"
#include "base/process.h"
#include "ipc/ipc_message.h"
#include "ipc/ipc_platform_file.h"
#include "ipc/ipc_sync_channel.h"
class MessageLoop;
namespace base {
class WaitableEvent;
}
namespace IPC {
class TestSink;
}
namespace pp {
namespace proxy {
class VarSerializationRules;
class ProxyChannel : public IPC::Channel::Listener,
public IPC::Message::Sender {
public:
typedef void (*ShutdownModuleFunc)();
class Delegate {
public:
// Returns the dedicated message loop for processing IPC requests.
virtual MessageLoop* GetIPCMessageLoop() = 0;
// Returns the event object that becomes signalled when the main thread's
// message loop exits.
virtual base::WaitableEvent* GetShutdownEvent() = 0;
};
virtual ~ProxyChannel();
// Alternative to InitWithChannel() for unit tests that want to send all
// messages sent via this channel to the given test sink. The test sink
// must outlive this class.
void InitWithTestSink(IPC::TestSink* test_sink);
// Shares a file handle (HANDLE / file descriptor) with the remote side. It
// returns a handle that should be sent in exactly one IPC message. Upon
// receipt, the remote side then owns that handle. Note: if sending the
// message fails, the returned handle is properly closed by the IPC system. If
// should_close_source is set to true, the original handle is closed by this
// operation and should not be used again.
IPC::PlatformFileForTransit ShareHandleWithRemote(
base::PlatformFile handle,
bool should_close_source);
// IPC::Message::Sender implementation.
virtual bool Send(IPC::Message* msg);
// IPC::Channel::Listener implementation.
virtual void OnChannelError();
// Will be NULL in some unit tests and if the remote side has crashed.
IPC::SyncChannel* channel() const {
return channel_.get();
}
#if defined(OS_POSIX)
int GetRendererFD();
#endif
protected:
ProxyChannel(base::ProcessHandle remote_process_handle);
// You must call this function before anything else. Returns true on success.
// The delegate pointer must outlive this class, ownership is not
// transferred.
virtual bool InitWithChannel(Delegate* delegate,
const IPC::ChannelHandle& channel_handle,
bool is_client);
ProxyChannel::Delegate* delegate() const {
return delegate_;
}
private:
// Non-owning pointer. Guaranteed non-NULL after init is called.
ProxyChannel::Delegate* delegate_;
base::ProcessHandle remote_process_handle_; // See getter above.
// When we're unit testing, this will indicate the sink for the messages to
// be deposited so they can be inspected by the test. When non-NULL, this
// indicates that the channel should not be used.
IPC::TestSink* test_sink_;
// Will be null for some tests when there is a test_sink_, and if the
// remote side has crashed.
scoped_ptr<IPC::SyncChannel> channel_;
DISALLOW_COPY_AND_ASSIGN(ProxyChannel);
};
} // namespace proxy
} // namespace pp
#endif // PPAPI_PROXY_PROXY_CHANNEL_H_
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