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/*
ChibiOS/RT - Copyright (C) 2006-2007 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/>.
*/
/**
* @addtogroup Time
* @{
*/
#ifndef _SLEEP_H_
#define _SLEEP_H_
/**
* Time conversion utility. Converts from seconds to system ticks number.
*/
#define S2ST(sec) ((systime_t)((sec) * CH_FREQUENCY))
/**
* Time conversion utility. Converts from milliseconds to system ticks number.
* @note The result is rounded upward to the next tick boundary.
*/
#define MS2ST(msec) ((systime_t)(((((msec) - 1L) * CH_FREQUENCY) / 1000) + 1))
/**
* Time conversion utility. Converts from microseconds to system ticks number.
* @note The result is rounded upward to the next tick boundary.
*/
#define US2ST(usec) ((systime_t)(((((usec) - 1L) * CH_FREQUENCY) / 1000000) + 1))
#ifdef __cplusplus
extern "C" {
#endif
void chThdSleep(systime_t time);
bool_t chSysInTimeWindow(systime_t start, systime_t end);
#ifdef __cplusplus
}
#endif
/**
* Returns the number of system ticks since the \p chSysInit() invocation.
* @return the system ticks number
* @note The counter can reach its maximum and then returns to zero.
* @note This function is designed to work with the \p chThdSleepUntil().
*/
#define chSysGetTime() dlist.dl_stime
/**
* Suspends the invoking thread until the system time arrives to the specified
* value.
*/
#define chThdSleepUntil(t) { \
chSysLock(); \
chSchGoSleepTimeoutS(PRSLEEP, \
(systime_t)((t) - chSysGetTime())); \
chSysUnlock(); \
}
#endif /* _SLEEP_H_ */
/** @} */
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