/*
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* Copyright (C) 2011 Philippe Gerum <rpm@xenomai.org>.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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#ifndef _XENOMAI_ALCHEMY_EVENT_H
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#define _XENOMAI_ALCHEMY_EVENT_H
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#include <stdint.h>
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#include <alchemy/timer.h>
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#include <alchemy/compat.h>
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/**
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* @addtogroup alchemy_event
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* @{
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*/
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/** Creation flags. */
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#define EV_PRIO 0x1 /* Pend by task priority order. */
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#define EV_FIFO 0x0 /* Pend by FIFO order. */
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/** Operation flags. */
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#define EV_ANY 0x1 /* Disjunctive wait. */
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#define EV_ALL 0x0 /* Conjunctive wait. */
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struct RT_EVENT {
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uintptr_t handle;
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};
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typedef struct RT_EVENT RT_EVENT;
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/**
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* @brief Event status descriptor
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* @anchor RT_EVENT_INFO
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*
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* This structure reports various static and runtime information about
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* an event flag group, returned by a call to rt_event_inquire().
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*/
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struct RT_EVENT_INFO {
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/**
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* Current value of the event flag group.
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*/
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unsigned int value;
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/**
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* Number of tasks currently waiting for events.
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*/
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int nwaiters;
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/**
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* Name of event flag group.
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*/
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char name[XNOBJECT_NAME_LEN];
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};
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typedef struct RT_EVENT_INFO RT_EVENT_INFO;
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#ifdef __cplusplus
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extern "C" {
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#endif
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CURRENT_DECL(int, rt_event_create(RT_EVENT *event,
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const char *name,
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unsigned int ivalue,
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int mode));
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int rt_event_delete(RT_EVENT *event);
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CURRENT_DECL(int, rt_event_signal(RT_EVENT *event,
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unsigned int mask));
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int rt_event_wait_timed(RT_EVENT *event,
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unsigned int mask,
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unsigned int *mask_r,
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int mode,
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const struct timespec *abs_timeout);
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#ifndef __XENO_COMPAT__
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static inline
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int rt_event_wait_until(RT_EVENT *event,
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unsigned int mask, unsigned int *mask_r,
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int mode, RTIME timeout)
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{
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struct timespec ts;
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return rt_event_wait_timed(event, mask, mask_r, mode,
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alchemy_abs_timeout(timeout, &ts));
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}
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static inline
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int rt_event_wait(RT_EVENT *event,
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unsigned int mask, unsigned int *mask_r,
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int mode, RTIME timeout)
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{
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struct timespec ts;
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return rt_event_wait_timed(event, mask, mask_r, mode,
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alchemy_rel_timeout(timeout, &ts));
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}
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#endif /* !__XENO_COMPAT__ */
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CURRENT_DECL(int, rt_event_clear(RT_EVENT *event,
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unsigned int mask,
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unsigned int *mask_r));
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int rt_event_inquire(RT_EVENT *event,
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RT_EVENT_INFO *info);
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int rt_event_bind(RT_EVENT *event,
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const char *name, RTIME timeout);
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int rt_event_unbind(RT_EVENT *event);
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#ifdef __cplusplus
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}
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#endif
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/** @} */
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#endif /* _XENOMAI_ALCHEMY_EVENT_H */
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