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/********************************************************************************
* timer_internal.h
*
* Copyright (C) 2007-2009 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_INTERNAL_H
#define __SCHED_TIMER_INTERNAL_H
/********************************************************************************
* Included Files
********************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <wdog.h>
#include <nuttx/compiler.h>
/********************************************************************************
* 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 */
uint8_t pt_signo; /* Notification signal */
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 */
union sigval pt_value; /* Data passed with notification */
};
/********************************************************************************
* Public Data
********************************************************************************/
/* This is a list of free, preallocated timer structures */
#if CONFIG_PREALLOC_TIMERS > 0
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_INTERNAL_H */
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