147 lines
4.3 KiB
C
147 lines
4.3 KiB
C
/****************************************************************************
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* sched/timer/timer_initialize.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/compiler.h>
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#include <sys/types.h>
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#include <time.h>
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#include <queue.h>
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#include <errno.h>
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#include <nuttx/irq.h>
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#include "timer/timer.h"
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#ifndef CONFIG_DISABLE_POSIX_TIMERS
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* These are the preallocated times */
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#if CONFIG_PREALLOC_TIMERS > 0
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static struct posix_timer_s g_prealloctimers[CONFIG_PREALLOC_TIMERS];
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#if CONFIG_PREALLOC_TIMERS > 0
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/* This is a list of free, preallocated timer structures */
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volatile sq_queue_t g_freetimers;
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#endif
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/* This is a list of instantiated timer structures -- active and inactive.
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* The timers are place on this list by timer_create() and removed from the
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* list by timer_delete() or when the owning thread exits.
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*/
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volatile sq_queue_t g_alloctimers;
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: timer_initialize
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*
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* Description:
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* Boot up configuration of the POSIX timer facility.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void weak_function timer_initialize(void)
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{
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#if CONFIG_PREALLOC_TIMERS > 0
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int i;
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/* Place all of the pre-allocated timers into the free timer list */
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sq_init((FAR sq_queue_t *)&g_freetimers);
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for (i = 0; i < CONFIG_PREALLOC_TIMERS; i++)
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{
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g_prealloctimers[i].pt_flags = PT_FLAGS_PREALLOCATED;
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sq_addlast((FAR sq_entry_t *)&g_prealloctimers[i],
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(FAR sq_queue_t *)&g_freetimers);
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}
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#endif
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/* Initialize the list of allocated timers */
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sq_init((FAR sq_queue_t *)&g_alloctimers);
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}
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/****************************************************************************
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* Name: timer_deleteall
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*
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* Description:
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* This function is called whenever a thread exits. Any timers owned by
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* that thread are deleted as though called by timer_delete().
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*
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* It is provided in this file so that it can be weakly defined but also,
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* like timer_intitialize(), be brought into the link whenever the timer
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* resources are referenced.
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*
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* Input Parameters:
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* pid - the task ID of the thread that exited
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void weak_function timer_deleteall(pid_t pid)
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{
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FAR struct posix_timer_s *timer;
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FAR struct posix_timer_s *next;
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irqstate_t flags;
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flags = enter_critical_section();
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for (timer = (FAR struct posix_timer_s *)g_alloctimers.head;
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timer != NULL;
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timer = next)
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{
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next = timer->flink;
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if (timer->pt_owner == pid)
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{
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timer_delete((timer_t)timer);
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}
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}
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leave_critical_section(flags);
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}
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#endif /* CONFIG_DISABLE_POSIX_TIMERS */
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