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// Copyright 2013 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 MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_QUEUE_H_
#define MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_QUEUE_H_
#include <queue>
#include "mojo/public/cpp/system/macros.h"
namespace mojo {
class Message;
namespace internal {
// A queue for Message objects.
class MessageQueue {
public:
MessageQueue();
~MessageQueue();
bool IsEmpty() const;
Message* Peek();
// This method transfers ownership of |message->data| and |message->handles|
// to the message queue, resetting |message| in the process.
void Push(Message* message);
// Removes the next message from the queue, transferring ownership of its
// data and handles to the given |message|.
void Pop(Message* message);
// Removes the next message from the queue, discarding its data and handles.
// This is meant to be used in conjunction with |Peek|.
void Pop();
private:
std::queue<Message*> queue_;
MOJO_DISALLOW_COPY_AND_ASSIGN(MessageQueue);
};
} // namespace internal
} // namespace mojo
#endif // MOJO_PUBLIC_CPP_BINDINGS_LIB_MESSAGE_QUEUE_H_
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