genode/repos/base-codezero/include/base/ipc_msgbuf.h
Norman Feske ca971bbfd8 Move repositories to 'repos/' subdirectory
This patch changes the top-level directory layout as a preparatory
step for improving the tools for managing 3rd-party source codes.
The rationale is described in the issue referenced below.

Issue #1082
2014-05-14 16:08:00 +02:00

64 lines
1.1 KiB
C++

/*
* \brief IPC message buffer
* \author Norman Feske
* \date 2009-10-02
*/
/*
* Copyright (C) 2009-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__BASE__IPC_MSGBUF_H_
#define _INCLUDE__BASE__IPC_MSGBUF_H_
namespace Genode {
/**
* IPC message buffer layout
*/
class Msgbuf_base
{
protected:
size_t _size;
char _msg_start[]; /* symbol marks start of message */
public:
/*
* Begin of actual message buffer
*/
char buf[];
/**
* Return size of message buffer
*/
inline size_t size() const { return _size; };
/**
* Return address of message buffer
*/
inline void *addr() { return &_msg_start[0]; };
} __attribute__((aligned(4)));
/**
* Instance of IPC message buffer with specified buffer size
*/
template <unsigned BUF_SIZE>
class Msgbuf : public Msgbuf_base
{
public:
char buf[BUF_SIZE];
Msgbuf() { _size = BUF_SIZE; }
} __attribute__((aligned(4)));
}
#endif /* _INCLUDE__BASE__IPC_MSGBUF_H_ */