| /**************************************************************************** |
| * sched/timer/timer_initialize.c |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Included Files |
| ****************************************************************************/ |
| |
| #include <nuttx/config.h> |
| #include <nuttx/compiler.h> |
| |
| #include <sys/types.h> |
| #include <time.h> |
| #include <errno.h> |
| |
| #include <nuttx/irq.h> |
| #include <nuttx/queue.h> |
| #include <nuttx/trace.h> |
| |
| #include "timer/timer.h" |
| |
| #ifndef CONFIG_DISABLE_POSIX_TIMERS |
| |
| /**************************************************************************** |
| * 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 |
| ****************************************************************************/ |
| |
| #if CONFIG_PREALLOC_TIMERS > 0 |
| /* This is a list of free, preallocated timer structures */ |
| |
| 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; |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Name: timer_initialize |
| * |
| * Description: |
| * Boot up configuration of the POSIX timer facility. |
| * |
| * Input Parameters: |
| * None |
| * |
| * Returned Value: |
| * None |
| * |
| ****************************************************************************/ |
| |
| void timer_initialize(void) |
| { |
| sched_trace_begin(); |
| |
| #if CONFIG_PREALLOC_TIMERS > 0 |
| int i; |
| |
| /* Place all of the pre-allocated timers into the free timer list */ |
| |
| sq_init((FAR 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((FAR sq_queue_t *)&g_alloctimers); |
| sched_trace_end(); |
| } |
| |
| /**************************************************************************** |
| * 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. |
| * |
| * Input Parameters: |
| * pid - the task ID of the thread that exited |
| * |
| * Returned Value: |
| * None |
| * |
| ****************************************************************************/ |
| |
| void timer_deleteall(pid_t pid) |
| { |
| FAR struct posix_timer_s *timer; |
| FAR struct posix_timer_s *next; |
| irqstate_t flags; |
| |
| flags = enter_critical_section(); |
| for (timer = (FAR struct posix_timer_s *)g_alloctimers.head; |
| timer != NULL; |
| timer = next) |
| { |
| next = timer->flink; |
| if (timer->pt_owner == pid) |
| { |
| timer_delete((timer_t)timer); |
| } |
| } |
| |
| leave_critical_section(flags); |
| } |
| |
| /**************************************************************************** |
| * Name: timer_gethandle |
| * |
| * Description: |
| * Returns the posix timer in the activity from the corresponding timerid |
| * |
| * Input Parameters: |
| * timerid - The pre-thread timer, previously created by the call to |
| * timer_create(), to be be set. |
| * |
| * Returned Value: |
| * On success, timer_gethandle() returns pointer to the posix_timer_s; |
| * On error, NULL is returned. |
| * |
| ****************************************************************************/ |
| |
| FAR struct posix_timer_s *timer_gethandle(timer_t timerid) |
| { |
| FAR struct posix_timer_s *timer = NULL; |
| FAR sq_entry_t *entry; |
| irqstate_t flags; |
| |
| if (timerid != NULL) |
| { |
| flags = spin_lock_irqsave(NULL); |
| |
| sq_for_every(&g_alloctimers, entry) |
| { |
| if (entry == timerid) |
| { |
| timer = (FAR struct posix_timer_s *)timerid; |
| break; |
| } |
| } |
| |
| spin_unlock_irqrestore(NULL, flags); |
| } |
| |
| return timer; |
| } |
| |
| #endif /* CONFIG_DISABLE_POSIX_TIMERS */ |