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/********************************************************************************
* timer_initialize.c
*
* 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.
*
********************************************************************************/
/********************************************************************************
* Included Files
********************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <sys/types.h>
#include <time.h>
#include <queue.h>
#include <errno.h>
#include "timer_internal.h"
#ifndef CONFIG_DISABLE_POSIX_TIMERS
/********************************************************************************
* Definitions
********************************************************************************/
/********************************************************************************
* Private Data
********************************************************************************/
/* These are the preallocated times */
#if CONFIG_PREALLOC_TIMERS > 0
static struct posix_timer_s g_prealloctimers[CONFIG_PREALLOC_TIMERS];
#endif
/********************************************************************************
* Public Data
********************************************************************************/
/* This is a list of free, preallocated timer structures */
#if CONFIG_PREALLOC_TIMERS > 0
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.
*/
volatile sq_queue_t g_alloctimers;
/********************************************************************************
* Private Functions
********************************************************************************/
/********************************************************************************
* Public Functions
********************************************************************************/
/********************************************************************************
* Name: timer_initialize
*
* Description:
* Boot up configuration of the POSIX timer facility.
*
* Parameters:
* None
*
* Return Value:
* None
*
* Assumptions:
*
********************************************************************************/
void weak_function timer_initialize(void)
{
#if CONFIG_PREALLOC_TIMERS > 0
int i;
/* Place all of the pre-allocated timers into the free timer list */
sq_init((sq_queue_t*)&g_freetimers);
for (i = 0; i < CONFIG_PREALLOC_TIMERS; i++)
{
g_prealloctimers[i].pt_flags = PT_FLAGS_PREALLOCATED;
sq_addlast((FAR sq_entry_t*)&g_prealloctimers[i], (FAR sq_queue_t*)&g_freetimers);
}
#endif
/* Initialize the list of allocated timers */
sq_init((sq_queue_t*)&g_alloctimers);
}
/********************************************************************************
* Name: timer_deleteall
*
* Description:
* This function is called whenever a thread exits. Any timers owned by that
* thread are deleted as though called by timer_delete().
*
* It is provided in this file so that it can be weakly defined but also,
* like timer_intitialize(), be brought into the link whenever the timer
* resources are referenced.
*
* Parameters:
* pid - the task ID of the thread that exited
*
* Return Value:
* None
*
* Assumptions:
*
********************************************************************************/
void weak_function timer_deleteall(pid_t pid)
{
FAR struct posix_timer_s *timer;
FAR struct posix_timer_s *next;
irqstate_t flags;
flags = irqsave();
for (timer = (FAR struct posix_timer_s*)g_alloctimers.head; timer; timer = next)
{
next = timer->flink;
if (timer->pt_owner == pid)
{
timer_delete((timer_t)timer);
}
}
irqrestore(flags);
}
#endif /* CONFIG_DISABLE_POSIX_TIMERS */
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