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/**
* @file rtems/posix/timer.h
*
* This include files defines the internal support for implementation of
* POSIX Timers.
*/
/*
* COPYRIGHT (c) 1989-2011.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#ifndef _RTEMS_POSIX_TIMER_H
#define _RTEMS_POSIX_TIMER_H
#include <rtems/posix/config.h>
#include <rtems/score/object.h>
#include <rtems/score/watchdog.h> /* Watchdog_Control */
#ifdef __cplusplus
extern "C" {
#endif
/* Timer is free */
#define POSIX_TIMER_STATE_FREE 0x01
/* Created timer but not running */
#define POSIX_TIMER_STATE_CREATE_NEW 0x02
/* Created timer and running */
#define POSIX_TIMER_STATE_CREATE_RUN 0x03
/* Created, ran and stopped timer */
#define POSIX_TIMER_STATE_CREATE_STOP 0x04
/* Indicates that the fire time is relative to the current one */
#define POSIX_TIMER_RELATIVE 0
/*
* POSIX defines TIMER_ABSTIME but no constant for relative. So
* we have one internally but we need to be careful it has a different
* value.
*/
#if (POSIX_TIMER_RELATIVE == TIMER_ABSTIME)
#error "POSIX_TIMER_RELATIVE == TIMER_ABSTIME"
#endif
/*
* Data for a timer
*/
typedef struct {
Objects_Control Object;
Watchdog_Control Timer; /* Internal Timer */
pthread_t thread_id; /* Thread identifier */
char state; /* State of the timer */
struct sigevent inf; /* Information associated to the timer */
struct itimerspec timer_data; /* Timing data of the timer */
uint32_t ticks; /* Number of ticks of the initialization */
uint32_t overrun; /* Number of expirations of the timer */
struct timespec time; /* Time at which the timer was started */
} POSIX_Timer_Control;
/*
* _POSIX_Timers_Manager_initialization
*
* DESCRIPTION:
*
* This routine performs the initialization necessary for this manager.
*/
void _POSIX_Timer_Manager_initialization(void);
/*
* Timer TSR
*/
void _POSIX_Timer_TSR(Objects_Id timer, void *data);
/*
* Watchdog Insert helper
*/
bool _POSIX_Timer_Insert_helper(
Watchdog_Control *timer,
Watchdog_Interval ticks,
Objects_Id id,
Watchdog_Service_routine_entry TSR,
void *arg
);
/*
* The following defines the information control block used to manage
* this class of objects.
*/
POSIX_EXTERN Objects_Information _POSIX_Timer_Information;
#ifndef __RTEMS_APPLICATION__
#include <rtems/posix/timer.inl>
#endif
#ifdef __cplusplus
}
#endif
#endif
/* end of include file */
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