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- /****************************************************************************
- * sched/timer/timer.h
- *
- * Copyright (C) 2007-2009, 2014-2015 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- ****************************************************************************/
- #ifndef __SCHED_TIMER_TIMER_H
- #define __SCHED_TIMER_TIMER_H
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <sys/types.h>
- #include <stdint.h>
- #include <nuttx/compiler.h>
- #include <nuttx/signal.h>
- #include <nuttx/wdog.h>
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- #define PT_FLAGS_PREALLOCATED 0x01 /* Timer comes from a pool of preallocated timers */
- /****************************************************************************
- * Public Types
- ****************************************************************************/
- /* This structure represents one POSIX timer */
- struct posix_timer_s
- {
- FAR struct posix_timer_s *flink;
- uint8_t pt_flags; /* See PT_FLAGS_* definitions */
- uint8_t pt_crefs; /* Reference count */
- pid_t pt_owner; /* Creator of timer */
- int pt_delay; /* If non-zero, used to reset repetitive timers */
- int pt_last; /* Last value used to set watchdog */
- WDOG_ID pt_wdog; /* The watchdog that provides the timing */
- struct sigevent pt_event; /* Notification information */
- struct sigwork_s pt_work;
- };
- /****************************************************************************
- * Public Data
- ****************************************************************************/
- #if CONFIG_PREALLOC_TIMERS > 0
- /* This is a list of free, preallocated timer structures */
- extern volatile sq_queue_t g_freetimers;
- #endif
- /* This is a list of instantiated timer structures -- active and inactive. The
- * timers are place on this list by timer_create() and removed from the list by
- * timer_delete() or when the owning thread exits.
- */
- extern volatile sq_queue_t g_alloctimers;
- /****************************************************************************
- * Public Function Prototypes
- ****************************************************************************/
- void weak_function timer_initialize(void);
- void weak_function timer_deleteall(pid_t pid);
- int timer_release(FAR struct posix_timer_s *timer);
- #endif /* __SCHED_TIMER_TIMER_H */
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