diff options
Diffstat (limited to 'src/chevents.c')
| -rw-r--r-- | src/chevents.c | 392 |
1 files changed, 0 insertions, 392 deletions
diff --git a/src/chevents.c b/src/chevents.c deleted file mode 100644 index 098adce5e..000000000 --- a/src/chevents.c +++ /dev/null @@ -1,392 +0,0 @@ -/*
- 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/>.
-*/
-
-/**
- * @file chevents.c
- * @brief Events code.
- * @addtogroup Events
- * @{
- */
-#include <ch.h>
-
-#if CH_USE_EVENTS
-/**
- * @brief Registers an Event Listener on an Event Source.
- *
- * @param[in] esp pointer to the @p EventSource structure
- * @param[in] elp pointer to the @p EventListener structure
- * @param[in] emask the mask of event flags to be pended to the thread when the
- * event source is broadcasted
- * @note Multiple Event Listeners can specify the same bits to be pended.
- */
-void chEvtRegisterMask(EventSource *esp, EventListener *elp, eventmask_t emask) {
-
- chDbgCheck((esp != NULL) && (elp != NULL), "chEvtRegisterMask");
-
- chSysLock();
- elp->el_next = esp->es_next;
- esp->es_next = elp;
- elp->el_listener = currp;
- elp->el_mask = emask;
- chSysUnlock();
-}
-
-/**
- * @brief Unregisters an Event Listener from its Event Source.
- *
- * @param[in] esp pointer to the @p EventSource structure
- * @param[in] elp pointer to the @p EventListener structure
- * @note If the event listener is not registered on the specified event source
- * then the function does nothing.
- * @note For optimal performance it is better to perform the unregister
- * operations in inverse order of the register operations (elements are
- * found on top of the list).
- */
-void chEvtUnregister(EventSource *esp, EventListener *elp) {
- EventListener *p;
-
- chDbgCheck((esp != NULL) && (elp != NULL), "chEvtUnregister");
-
- p = (EventListener *)esp;
- chSysLock();
- while (p->el_next != (EventListener *)esp) {
- if (p->el_next == elp) {
- p->el_next = elp->el_next;
- break;
- }
- p = p->el_next;
- }
- chSysUnlock();
-}
-
-/**
- * @brief Clears the pending events specified in the mask.
- *
- * @param[in] mask the events to be cleared
- * @return The pending events that were cleared.
- */
-eventmask_t chEvtClear(eventmask_t mask) {
- eventmask_t m;
-
- chSysLock();
-
- m = currp->p_epending & mask;
- currp->p_epending &= ~mask;
-
- chSysUnlock();
- return m;
-}
-
-/**
- * @brief Pends a set of event flags on the current thread, this is @b much
- * faster than using @p chEvtBroadcast() or @p chEvtSignal().
- *
- * @param[in] mask the events to be pended
- * @return The current pending events mask.
- */
-eventmask_t chEvtPend(eventmask_t mask) {
-
- chSysLock();
-
- mask = (currp->p_epending |= mask);
-
- chSysUnlock();
- return mask;
-}
-
-/**
- * @brief Pends a set of event flags on the specified @p Thread.
- *
- * @param[in] tp the thread to be signaled
- * @param[in] mask the event flags set to be pended
- */
-void chEvtSignal(Thread *tp, eventmask_t mask) {
-
- chDbgCheck(tp != NULL, "chEvtSignal");
-
- chSysLock();
- chEvtSignalI(tp, mask);
- chSysUnlock();
-}
-
-/**
- * @brief Pends a set of event flags on the specified @p Thread.
- *
- * @param[in] tp the thread to be signaled
- * @param[in] mask the event flags set to be pended
- */
-void chEvtSignalI(Thread *tp, eventmask_t mask) {
-
- chDbgCheck(tp != NULL, "chEvtSignalI");
-
- tp->p_epending |= mask;
- /* Test on the AND/OR conditions wait states.*/
- if (((tp->p_state == PRWTOREVT) && ((tp->p_epending & tp->p_ewmask) != 0)) ||
- ((tp->p_state == PRWTANDEVT) && ((tp->p_epending & tp->p_ewmask) == tp->p_ewmask)))
- chSchReadyI(tp)->p_rdymsg = RDY_OK;
-}
-
-/**
- * @brief Signals all the Event Listeners registered on the specified Event
- * Source.
- *
- * @param[in] esp pointer to the @p EventSource structure
- */
-void chEvtBroadcast(EventSource *esp) {
-
- chSysLock();
- chEvtBroadcastI(esp);
- chSchRescheduleS();
- chSysUnlock();
-}
-
-/**
- * @brief Signals all the Event Listeners registered on the specified Event
- * Source.
- *
- * @param[in] esp pointer to the @p EventSource structure
- */
-void chEvtBroadcastI(EventSource *esp) {
- EventListener *elp;
-
- chDbgCheck(esp != NULL, "chEvtBroadcastI");
-
- elp = esp->es_next;
- while (elp != (EventListener *)esp) {
- chEvtSignalI(elp->el_listener, elp->el_mask);
- elp = elp->el_next;
- }
-}
-
-/**
- * @brief Invokes the event handlers associated with a mask.
- *
- * @param[in] mask mask of the events to be dispatched
- * @param[in] handlers an array of @p evhandler_t. The array must have size
- * equal to the number of bits in eventmask_t.
- */
-void chEvtDispatch(const evhandler_t handlers[], eventmask_t mask) {
- eventid_t eid;
-
- chDbgCheck(handlers != NULL, "chEvtDispatch");
-
- eid = 0;
- while (mask) {
- if (mask & EVENT_MASK(eid)) {
- chDbgAssert(handlers[eid] != NULL,
- "chEvtDispatch(), #1",
- "null handler");
- mask &= ~EVENT_MASK(eid);
- handlers[eid](eid);
- }
- eid++;
- }
-}
-
-#if CH_OPTIMIZE_SPEED || !CH_USE_EVENTS_TIMEOUT || defined(__DOXYGEN__)
-/**
- * @brief Waits for exactly one of the specified events.
- * @details The function waits for one event among those specified in
- * @p ewmask to become pending then the event is cleared and returned.
- *
- * @param[in] ewmask mask of the events that the function should wait for,
- * @p ALL_EVENTS enables all the events
- * @return The mask of the lowest id served and cleared event.
- * @note One and only one event is served in the function, the one with the
- * lowest event id. The function is meant to be invoked into a loop in
- * order to serve all the pending events.<br>
- * This means that Event Listeners with a lower event identifier have
- * an higher priority.
- */
-eventmask_t chEvtWaitOne(eventmask_t ewmask) {
- eventmask_t m;
-
- chSysLock();
-
- if ((m = (currp->p_epending & ewmask)) == 0) {
- currp->p_ewmask = ewmask;
- chSchGoSleepS(PRWTOREVT);
- m = currp->p_epending & ewmask;
- }
- m &= -m;
- currp->p_epending &= ~m;
-
- chSysUnlock();
- return m;
-}
-
-/**
- * @brief Waits for any of the specified events.
- * @details The function waits for any event among those specified in
- * @p ewmask to become pending then the events are cleared and returned.
- *
- * @param[in] ewmask mask of the events that the function should wait for,
- * @p ALL_EVENTS enables all the events
- * @return The mask of the served and cleared events.
- */
-eventmask_t chEvtWaitAny(eventmask_t ewmask) {
- eventmask_t m;
-
- chSysLock();
-
- if ((m = (currp->p_epending & ewmask)) == 0) {
- currp->p_ewmask = ewmask;
- chSchGoSleepS(PRWTOREVT);
- m = currp->p_epending & ewmask;
- }
- currp->p_epending &= ~m;
-
- chSysUnlock();
- return m;
-}
-
-/**
- * @brief Waits for all the specified events.
- * @details The function waits for all the events specified in @p ewmask to
- * become pending then the events are cleared and returned.
- *
- * @param[in] ewmask mask of the event ids that the function should wait for
- * @return The mask of the served and cleared events.
- */
-eventmask_t chEvtWaitAll(eventmask_t ewmask) {
-
- chSysLock();
-
- if ((currp->p_epending & ewmask) != ewmask) {
- currp->p_ewmask = ewmask;
- chSchGoSleepS(PRWTANDEVT);
- }
- currp->p_epending &= ~ewmask;
-
- chSysUnlock();
- return ewmask;
-}
-#endif /* CH_OPTIMIZE_SPEED || !CH_USE_EVENTS_TIMEOUT */
-
-#if CH_USE_EVENTS_TIMEOUT
-/**
- * @brief Waits for exactly one of the specified events.
- * @details The function waits for one event among those specified in
- * @p ewmask to become pending then the event is cleared and returned.
- *
- * @param[in] ewmask mask of the events that the function should wait for,
- * @p ALL_EVENTS enables all the events
- * @param[in] time the number of ticks before the operation timeouts,
- * the following special values are allowed:
- * - @a TIME_IMMEDIATE immediate timeout.
- * - @a TIME_INFINITE no timeout.
- * .
- * @return The mask of the lowest id served and cleared event.
- * @retval 0 if the specified timeout expired.
- * @note One and only one event is served in the function, the one with the
- * lowest event id. The function is meant to be invoked into a loop in
- * order to serve all the pending events.<br>
- * This means that Event Listeners with a lower event identifier have
- * an higher priority.
- */
-eventmask_t chEvtWaitOneTimeout(eventmask_t ewmask, systime_t time) {
- eventmask_t m;
-
- chSysLock();
-
- if ((m = (currp->p_epending & ewmask)) == 0) {
- if (TIME_IMMEDIATE == time)
- return (eventmask_t)0;
- currp->p_ewmask = ewmask;
- if (chSchGoSleepTimeoutS(PRWTOREVT, time) < RDY_OK)
- return (eventmask_t)0;
- m = currp->p_epending & ewmask;
- }
- m &= -m;
- currp->p_epending &= ~m;
-
- chSysUnlock();
- return m;
-}
-
-/**
- * @brief Waits for any of the specified events.
- * @details The function waits for any event among those specified in
- * @p ewmask to become pending then the events are cleared and
- * returned.
- *
- * @param[in] ewmask mask of the events that the function should wait for,
- * @p ALL_EVENTS enables all the events
- * @param[in] time the number of ticks before the operation timeouts,
- * the following special values are allowed:
- * - @a TIME_IMMEDIATE immediate timeout.
- * - @a TIME_INFINITE no timeout.
- * .
- * @return The mask of the served and cleared events.
- * @retval 0 if the specified timeout expired.
- */
-eventmask_t chEvtWaitAnyTimeout(eventmask_t ewmask, systime_t time) {
- eventmask_t m;
-
- chSysLock();
-
- if ((m = (currp->p_epending & ewmask)) == 0) {
- if (TIME_IMMEDIATE == time)
- return (eventmask_t)0;
- currp->p_ewmask = ewmask;
- if (chSchGoSleepTimeoutS(PRWTOREVT, time) < RDY_OK)
- return (eventmask_t)0;
- m = currp->p_epending & ewmask;
- }
- currp->p_epending &= ~m;
-
- chSysUnlock();
- return m;
-}
-
-/**
- * @brief Waits for all the specified events.
- * @details The function waits for all the events specified in @p ewmask to
- * become pending then the events are cleared and returned.
- *
- * @param[in] ewmask mask of the event ids that the function should wait for
- * @param[in] time the number of ticks before the operation timeouts,
- * the following special values are allowed:
- * - @a TIME_IMMEDIATE immediate timeout.
- * - @a TIME_INFINITE no timeout.
- * .
- * @return The mask of the served and cleared events.
- * @retval 0 if the specified timeout expired.
- */
-eventmask_t chEvtWaitAllTimeout(eventmask_t ewmask, systime_t time) {
-
- chSysLock();
-
- if ((currp->p_epending & ewmask) != ewmask) {
- if (TIME_IMMEDIATE == time)
- return (eventmask_t)0;
- currp->p_ewmask = ewmask;
- if (chSchGoSleepTimeoutS(PRWTANDEVT, time) < RDY_OK)
- return (eventmask_t)0;
- }
- currp->p_epending &= ~ewmask;
-
- chSysUnlock();
- return ewmask;
-}
-#endif /* CH_USE_EVENTS_TIMEOUT */
-
-#endif /* CH_USE_EVENTS */
-
-/** @} */
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