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1f8031f79a
`config.h` has all the defines from autoconf, which may include things that switch behavior of other included headers (e.g. _GNU_SOURCE enabling prototypes for additional functions.) So, the first include in any `.c` file must be either `config.h` (with the appropriate guard) or `zebra.h` (which includes `config.h` first thing.) Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/*
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* This file is part of the PCEPlib, a PCEP protocol library.
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*
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* Copyright (C) 2020 Volta Networks https://voltanet.io/
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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* Author : Brady Johnson <brady@voltanet.io>
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <errno.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <sys/select.h>
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#include "pcep_timers_event_loop.h"
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#include "pcep_timer_internals.h"
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#include "pcep_utils_ordered_list.h"
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#include "pcep_utils_logging.h"
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#include "pcep_utils_memory.h"
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/* For each expired timer: remove the timer from the list, call the
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* expire_handler, and free the timer. */
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void walk_and_process_timers(pcep_timers_context *timers_context)
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{
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pthread_mutex_lock(&timers_context->timer_list_lock);
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bool keep_walking = true;
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ordered_list_node *timer_node = timers_context->timer_list->head;
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time_t now = time(NULL);
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pcep_timer *timer_data;
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/* the timers are sorted by expire_time, so we will only
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* remove the top node each time through the loop */
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while (timer_node != NULL && keep_walking) {
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timer_data = (pcep_timer *)timer_node->data;
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if (timer_data->expire_time <= now) {
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timer_node = timer_node->next_node;
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ordered_list_remove_first_node(
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timers_context->timer_list);
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/* call the timer expired handler */
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timers_context->expire_handler(timer_data->data,
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timer_data->timer_id);
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pceplib_free(PCEPLIB_INFRA, timer_data);
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} else {
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keep_walking = false;
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}
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}
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pthread_mutex_unlock(&timers_context->timer_list_lock);
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}
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/* pcep_timers::initialize() will create a thread and invoke this method */
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void *event_loop(void *context)
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{
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if (context == NULL) {
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pcep_log(
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LOG_WARNING,
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"%s: pcep_timers_event_loop cannot start event_loop with NULL data",
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__func__);
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return NULL;
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}
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pcep_log(LOG_NOTICE, "%s: [%ld-%ld] Starting timers_event_loop thread",
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__func__, time(NULL), pthread_self());
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pcep_timers_context *timers_context = (pcep_timers_context *)context;
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struct timeval timer;
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int retval;
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while (timers_context->active) {
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/* check the timers every half second */
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timer.tv_sec = 0;
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timer.tv_usec = 500000;
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do {
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/* if the select() call gets interrupted, select() will
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* set the remaining time in timer, so we need to call
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* it again.
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*/
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retval = select(0, NULL, NULL, NULL, &timer);
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} while (retval != 0 && errno == EINTR);
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walk_and_process_timers(timers_context);
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}
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pcep_log(LOG_WARNING, "%s: [%ld-%ld] Finished timers_event_loop thread",
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__func__, time(NULL), pthread_self());
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return NULL;
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}
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