timer_create(CLOCK_REALTIME, &sev, &timerId); if (res != 0){ fprintf(stderr, "Error timer_create: %s\n", strerror(errno)); exit(-1); } /* 启动定时器 */ res = timer_settime(timerId, 0, &its, NULL); if (res != 0){ fprintf(stderr, "Error timer_settime:...
linux centos timer_create接口 1#include <stdio.h>2#include <stdlib.h>3#include <string.h>4#include <unistd.h>5#include <pthread.h>6#include <signal.h>7#include 8#include <sys/timeb.h>9#include <sys/times.h>10111213#definexxxx_print_ln(log_level, fmt, ...) do { printf("(%s|...
int timer_create(clockid_t clockid, struct sigevent *sevp, timer_t *timerid); 使用到的时间参数数据结构体有下面两该个 struct timespec { time_t tv_sec; /* Seconds */ long tv_nsec; /* Nanoseconds */ }; struct itimerspec { struct timespec it_interval; /* Timer interval */ struct ti...
51 if (0 != timer_settime((timer_t)timerid, 0, &it, NULL)) { 52 return -1; 53 } 54 55 return 0; 56 } 57 58 static void xxxx_timer_thread(union sigval sig_v) 59 { 60 T_TIMER_ARG *timer_arg = NULL; 61 62 timer_arg = (T_TIMER_ARG *)sig_v.sival_ptr; 63 64 if ...
res = timer_create(CLOCK_REALTIME, &sev, &timerId); if (res != 0){ fprintf(stderr, "Error timer_create: %s\n", strerror(errno)); exit(-1); } /* 启动定时器 */ res = timer_settime(timerId, 0, &its, NULL); if (res != 0){ ...
Timer - thread-id: %d\n", gettid()); sev.sigev_notify = SIGEV_SIGNAL; // Linux-specific sev.sigev_signo = SIGRTMIN; sev.sigev_value.sival_ptr = &eventData; /* 创建定时器 */ res = timer_create(CLOCK_REALTIME, &sev, &timerId); if ( res != 0){ fprintf(stderr, "Error timer...
if (timer_create(CLOCK_REALTIME, &evp, &timerid) == -1) { perror("fail to timer_create"); exit(-1); } struct itimerspec it; it.it_interval.tv_sec = 2; it.it_interval.tv_nsec = 0; it.it_value.tv_sec = 1; it.it_value.tv_nsec = 0; ...
上面介绍完linux内核定时器的实现后,下面简单说一下,基于内核定时器实现的,对用户层开放的定时器API:间隔定时器itimer和POSIX定时器。 2.1 常见定时功能的API:sleep系列 在介绍itimer和POSIX定时器之前,我们先看看我们经常遇到过具有定时功能的库函数API接口: ...
ITIMER_VIRTUAL:创建以进程虚拟时间(用户模式下的CPU时间) 倒计时的定时器,到期时会产生信号 SIGVTALRM ITIMER_PROF:创建一个 profiling 定时器,以进程时间(用户态与内核态 CPU 时间的总和)倒计时,到期时,则会产生 SIGPROF 信号 针对所有这些信号的默认处置均会终止进程,除非真地期望如此,否则就需要针对这些定时器...
timer_create()/timer_settime()系列函数是POSIX规定,精度达到纳秒级,提供了一个数据结构struct sigevent可以指定一个实时信号作为通知信号,同时也可以设置线程ID,将信号传递到指定的线程。相比前两个函数,有了不小的改进,可以作为一个备选的实现,但是可以预见到封装起来不会很轻松。此外使用此系列的函数,需要链接libr...