aboutsummaryrefslogtreecommitdiffstats
path: root/os/kernel/include/chmsg.h
blob: 1947c02f79e66a46b4dd345de252f4407d07a48b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
/*
    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.

    This file is part of ChibiOS/RT.

    ChibiOS/RT is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    ChibiOS/RT is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/**
 * @file    chmsg.h
 * @brief   Messages macros and structures.
 *
 * @addtogroup messages
 * @{
 */

#ifndef _CHMSG_H_
#define _CHMSG_H_

#if CH_USE_MESSAGES

/**
 * @brief   Evaluates to TRUE if the thread has pending messages.
 */
#define chMsgIsPendingI(tp) \
        ((tp)->p_msgqueue.p_next != (Thread *)&(tp)->p_msgqueue)

/**
 * @brief   Returns the first message in the queue.
 */
#define chMsgGetI(tp) \
        ((tp)->p_msgqueue.p_next->p_msg)

#ifdef __cplusplus
extern "C" {
#endif
  msg_t chMsgSend(Thread *tp, msg_t msg);
  msg_t chMsgWait(void);
  msg_t chMsgGet(void);
  void chMsgRelease(msg_t msg);
#ifdef __cplusplus
}
#endif

#endif /* CH_USE_MESSAGES */

#endif /* _CHMSG_H_ */

/** @} */