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/*
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_ */
/** @} */
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