mirror of
https://github.com/genodelabs/genode.git
synced 2024-12-25 16:31:06 +00:00
64 lines
1.1 KiB
C
64 lines
1.1 KiB
C
|
/*
|
||
|
* \brief IPC message buffer
|
||
|
* \author Norman Feske
|
||
|
* \date 2009-10-02
|
||
|
*/
|
||
|
|
||
|
/*
|
||
|
* Copyright (C) 2009-2011 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_ */
|