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Added support for POSIX timers

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@111 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2007-03-21 17:21:26 +00:00
parent 30d90deedf
commit 28a4afaf3a
33 changed files with 1646 additions and 142 deletions
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sched/timer_create.c
+106 -4
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@@ -38,10 +38,14 @@
********************************************************************************/
#include <nuttx/config.h>
#include <stdlib.h>
#include <unistd.h>
#include <time.h>
#include <wdog.h>
#include <errno.h>
#include "timer_internal.h"
#ifdef CONFIG_POSIX_TIMERS
#ifndef CONFIG_DISABLE_POSIX_TIMERS
/********************************************************************************
* Definitions
@@ -59,6 +63,52 @@
* Private Functions
********************************************************************************/
/********************************************************************************
* Function: timer_allocate
*
* Description:
* Allocate one POSIX timer and place it into the allocated timer list.
*
********************************************************************************/
static struct posix_timer_s *timer_allocate(void)
{
struct posix_timer_s *ret;
irqstate_t flags;
/* Try to get a preallocated timer from the free list */
#if CONFIG_PREALLOC_TIMERS > 0
flags = irqsave();
ret = (struct posix_timer_s*)sq_remfirst((sq_queue_t*)&g_freetimers);
irqrestore(flags);
/* Did we get one? */
if (!ret)
#endif
{
/* Allocate a new timer from the heap */
ret = (struct posix_timer_s*)malloc(sizeof(struct posix_timer_s));
if (ret)
{
ret->pt_flags = 0;
}
}
/* If we have a timer, then put it into the allocated timer list */
if (ret)
{
flags = irqsave();
sq_addlast((sq_entry_t*)ret, (sq_queue_t*)&g_alloctimers);
irqrestore(flags);
}
return ret;
}
/********************************************************************************
* Public Functions
********************************************************************************/
@@ -113,8 +163,60 @@
int timer_create(clockid_t clockid, FAR struct sigevent *evp, FAR timer_t *timerid)
{
#warning "Not Implemented"
return ENOTSUP;
struct posix_timer_s *ret;
WDOG_ID wdog;
/* Sanity checks. Also, we support only CLOCK_REALTIME */
if (!timerid || clockid != CLOCK_REALTIME)
{
*get_errno_ptr() = EINVAL;
return ERROR;
}
/* Allocate a watchdog to provide the underling CLOCK_REALTIME timer */
wdog = wd_create();
if (!wdog)
{
*get_errno_ptr() = EAGAIN;
return ERROR;
}
/* Allocate a timer instance to contain the watchdog */
ret = timer_allocate();
if (!ret)
{
*get_errno_ptr() = EAGAIN;
return ERROR;
}
/* Initialize the timer instance */
ret->pt_owner = getpid();
ret->pt_delay = 0;
ret->pt_wdog = wdog;
if (evp)
{
ret->pt_signo = evp->sigev_signo;
#ifdef CONFIG_CAN_PASS_STRUCTS
ret->pt_value = evp->sigev_value;
#else
ret->pt_value.sival_ptr = evp->sigev_value.sigval_ptr;
#endif
}
else
{
ret->pt_signo = SIGALRM;
ret->pt_value.sival_ptr = ret;
}
/* Return the timer */
*timerid = ret;
return OK;
}
#endif /* CONFIG_POSIX_TIMERS */
#endif /* CONFIG_DISABLE_POSIX_TIMERS */