213 lines
7.1 KiB
C
213 lines
7.1 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
|
|
2011,2012,2013 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/>.
|
|
|
|
---
|
|
|
|
A special exception to the GPL can be applied should you wish to distribute
|
|
a combined work that includes ChibiOS/RT, without being obliged to provide
|
|
the source code for any proprietary components. See the file exception.txt
|
|
for full details of how and when the exception can be applied.
|
|
*/
|
|
/*
|
|
Concepts and parts of this file have been contributed by Scott (skute).
|
|
*/
|
|
|
|
/**
|
|
* @file chevents.h
|
|
* @brief Events macros and structures.
|
|
*
|
|
* @addtogroup events
|
|
* @{
|
|
*/
|
|
|
|
#ifndef _CHEVENTS_H_
|
|
#define _CHEVENTS_H_
|
|
|
|
#if CH_USE_EVENTS || defined(__DOXYGEN__)
|
|
|
|
typedef struct EventListener EventListener;
|
|
|
|
/**
|
|
* @brief Event Listener structure.
|
|
*/
|
|
struct EventListener {
|
|
EventListener *el_next; /**< @brief Next Event Listener
|
|
registered on the Event
|
|
Source. */
|
|
Thread *el_listener; /**< @brief Thread interested in the
|
|
Event Source. */
|
|
eventmask_t el_mask; /**< @brief Event flags mask associated
|
|
by the thread to the Event
|
|
Source. */
|
|
flagsmask_t el_flags; /**< @brief Flags added to the listener
|
|
by the event source. */
|
|
};
|
|
|
|
/**
|
|
* @brief Event Source structure.
|
|
*/
|
|
typedef struct EventSource {
|
|
EventListener *es_next; /**< @brief First Event Listener
|
|
registered on the Event
|
|
Source. */
|
|
} EventSource;
|
|
|
|
/**
|
|
* @brief Event Handler callback function.
|
|
*/
|
|
typedef void (*evhandler_t)(eventid_t);
|
|
|
|
/**
|
|
* @brief Data part of a static event source initializer.
|
|
* @details This macro should be used when statically initializing an event
|
|
* source that is part of a bigger structure.
|
|
* @param name the name of the event source variable
|
|
*/
|
|
#define _EVENTSOURCE_DATA(name) {(void *)(&name)}
|
|
|
|
/**
|
|
* @brief Static event source initializer.
|
|
* @details Statically initialized event sources require no explicit
|
|
* initialization using @p chEvtInit().
|
|
*
|
|
* @param name the name of the event source variable
|
|
*/
|
|
#define EVENTSOURCE_DECL(name) EventSource name = _EVENTSOURCE_DATA(name)
|
|
|
|
/**
|
|
* @brief All events allowed mask.
|
|
*/
|
|
#define ALL_EVENTS ((eventmask_t)-1)
|
|
|
|
/**
|
|
* @brief Returns an event mask from an event identifier.
|
|
*/
|
|
#define EVENT_MASK(eid) ((eventmask_t)(1 << (eid)))
|
|
|
|
/**
|
|
* @name Macro Functions
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Registers an Event Listener on an Event Source.
|
|
* @note Multiple Event Listeners can use the same event identifier, the
|
|
* listener will share the callback function.
|
|
*
|
|
* @param[in] esp pointer to the @p EventSource structure
|
|
* @param[out] elp pointer to the @p EventListener structure
|
|
* @param[in] eid numeric identifier assigned to the Event Listener. The
|
|
* identifier is used as index for the event callback
|
|
* function.
|
|
* The value must range between zero and the size, in bit,
|
|
* of the @p eventmask_t type minus one.
|
|
*
|
|
* @api
|
|
*/
|
|
#define chEvtRegister(esp, elp, eid) \
|
|
chEvtRegisterMask(esp, elp, EVENT_MASK(eid))
|
|
|
|
/**
|
|
* @brief Initializes an Event Source.
|
|
* @note This function can be invoked before the kernel is initialized
|
|
* because it just prepares a @p EventSource structure.
|
|
*
|
|
* @param[out] esp pointer to the @p EventSource structure
|
|
*
|
|
* @init
|
|
*/
|
|
#define chEvtInit(esp) \
|
|
((esp)->es_next = (EventListener *)(void *)(esp))
|
|
|
|
/**
|
|
* @brief Verifies if there is at least one @p EventListener registered.
|
|
*
|
|
* @param[in] esp pointer to the @p EventSource structure
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chEvtIsListeningI(esp) \
|
|
((void *)(esp) != (void *)(esp)->es_next)
|
|
|
|
/**
|
|
* @brief Signals all the Event Listeners registered on the specified Event
|
|
* Source.
|
|
*
|
|
* @param[in] esp pointer to the @p EventSource structure
|
|
*
|
|
* @api
|
|
*/
|
|
#define chEvtBroadcast(esp) chEvtBroadcastFlags(esp, 0)
|
|
|
|
/**
|
|
* @brief Signals all the Event Listeners registered on the specified Event
|
|
* Source.
|
|
* @post This function does not reschedule so a call to a rescheduling
|
|
* function must be performed before unlocking the kernel. Note that
|
|
* interrupt handlers always reschedule on exit so an explicit
|
|
* reschedule must not be performed in ISRs.
|
|
*
|
|
* @param[in] esp pointer to the @p EventSource structure
|
|
*
|
|
* @iclass
|
|
*/
|
|
#define chEvtBroadcastI(esp) chEvtBroadcastFlagsI(esp, 0)
|
|
/** @} */
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
void chEvtRegisterMask(EventSource *esp,
|
|
EventListener *elp,
|
|
eventmask_t mask);
|
|
void chEvtUnregister(EventSource *esp, EventListener *elp);
|
|
eventmask_t chEvtGetAndClearEvents(eventmask_t mask);
|
|
eventmask_t chEvtAddEvents(eventmask_t mask);
|
|
flagsmask_t chEvtGetAndClearFlags(EventListener *elp);
|
|
flagsmask_t chEvtGetAndClearFlagsI(EventListener *elp);
|
|
void chEvtSignal(Thread *tp, eventmask_t mask);
|
|
void chEvtSignalI(Thread *tp, eventmask_t mask);
|
|
void chEvtBroadcastFlags(EventSource *esp, flagsmask_t flags);
|
|
void chEvtBroadcastFlagsI(EventSource *esp, flagsmask_t flags);
|
|
void chEvtDispatch(const evhandler_t *handlers, eventmask_t mask);
|
|
#if CH_OPTIMIZE_SPEED || !CH_USE_EVENTS_TIMEOUT
|
|
eventmask_t chEvtWaitOne(eventmask_t mask);
|
|
eventmask_t chEvtWaitAny(eventmask_t mask);
|
|
eventmask_t chEvtWaitAll(eventmask_t mask);
|
|
#endif
|
|
#if CH_USE_EVENTS_TIMEOUT
|
|
eventmask_t chEvtWaitOneTimeout(eventmask_t mask, systime_t time);
|
|
eventmask_t chEvtWaitAnyTimeout(eventmask_t mask, systime_t time);
|
|
eventmask_t chEvtWaitAllTimeout(eventmask_t mask, systime_t time);
|
|
#endif
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#if !CH_OPTIMIZE_SPEED && CH_USE_EVENTS_TIMEOUT
|
|
#define chEvtWaitOne(mask) chEvtWaitOneTimeout(mask, TIME_INFINITE)
|
|
#define chEvtWaitAny(mask) chEvtWaitAnyTimeout(mask, TIME_INFINITE)
|
|
#define chEvtWaitAll(mask) chEvtWaitAllTimeout(mask, TIME_INFINITE)
|
|
#endif
|
|
|
|
#endif /* CH_USE_EVENTS */
|
|
|
|
#endif /* _CHEVENTS_H_ */
|
|
|
|
/** @} */
|