150 lines
3.0 KiB
C
150 lines
3.0 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program 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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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <pthread.h>
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#include <sys/timerfd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include "task-utils.h"
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struct task_info *task_init(void *(*threadfn)(void *), int (*postfn)(void *),
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void *thread_private)
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{
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struct task_info *info = calloc(1, sizeof(struct task_info));
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if (!info)
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return NULL;
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info->private_data = thread_private;
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info->threadfn = threadfn;
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info->postfn = postfn;
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return info;
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}
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int task_start(struct task_info *info, time_t *start_time, u64 *item_count)
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{
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int ret;
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if (!info)
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return -1;
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if (!info->threadfn)
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return -1;
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if (start_time)
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*start_time = time(NULL);
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if (item_count)
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*item_count = 0;
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ret = pthread_create(&info->id, NULL, info->threadfn,
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info->private_data);
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if (ret)
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info->id = 0;
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return ret;
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}
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void task_stop(struct task_info *info)
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{
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if (!info)
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return;
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if (info->id) {
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pthread_cancel(info->id);
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pthread_join(info->id, NULL);
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info->id = 0;
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}
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if (info->periodic.timer_fd) {
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close(info->periodic.timer_fd);
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info->periodic.timer_fd = 0;
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}
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if (info->postfn)
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info->postfn(info->private_data);
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}
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void task_deinit(struct task_info *info)
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{
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if (!info)
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return;
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free(info);
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}
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int task_period_start(struct task_info *info, unsigned int period_ms)
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{
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unsigned int ns;
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unsigned int sec;
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struct itimerspec itval;
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if (!info)
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return -1;
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info->periodic.timer_fd = timerfd_create(CLOCK_MONOTONIC, 0);
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if (info->periodic.timer_fd == -1) {
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info->periodic.timer_fd = 0;
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return info->periodic.timer_fd;
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}
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info->periodic.wakeups_missed = 0;
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sec = period_ms / 1000;
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ns = (period_ms - (sec * 1000)) * 1000 * 1000;
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itval.it_interval.tv_sec = sec;
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itval.it_interval.tv_nsec = ns;
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itval.it_value.tv_sec = sec;
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itval.it_value.tv_nsec = ns;
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return timerfd_settime(info->periodic.timer_fd, 0, &itval, NULL);
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};
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void task_period_wait(struct task_info *info)
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{
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unsigned long long missed;
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int ret;
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if (!info)
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return;
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if (info->periodic.timer_fd == 0)
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return;
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ret = read(info->periodic.timer_fd, &missed, sizeof (missed));
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if (ret == -1)
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return;
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if (missed > 0)
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info->periodic.wakeups_missed += (missed - 1);
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}
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void task_period_stop(struct task_info *info)
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{
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if (!info)
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return;
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if (info->periodic.timer_fd) {
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timerfd_settime(info->periodic.timer_fd, 0, NULL, NULL);
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close(info->periodic.timer_fd);
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info->periodic.timer_fd = -1;
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}
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}
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