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ev_signal结构体:
typedef struct ev_signal {
int active;
int pending;
int priority;
void* data;
void (*cb)(struct ev_loop *loop, struct ev_signal *w,int revents);
struct ev_watcher_list *next;
int signum;//
} ev_signal;
ev_signal当接收到指定的信号时调用触发事件EV_SIGNAL
相关函数:
ev_init(ev,cb_);
ev_signal_set(ev,signum);
//等价于ev_signal_init(ev,cb,signum)
ev_signal_start(EV_P_ ev_signal *w) ;
ev_signal_stop(EV_P_ ev_signal *w) ;参数说明:
前两个不用再说明了,同ev_io,ev_timer一样,第三个参数是代表触发的信号类型,一般是SIGINT(执行CTRL+C退出应用程序时触发)
代码如下:
#include <stdio.h>
#include <signal.h>
#include <string.h>
#include <sys/unistd.h>
#include "ev.h"
void signal_action(struct ev_loop *main_loop,ev_signal *signal_w,int e)
{
puts("In Signal action");
ev_signal_stop(main_loop,signal_w);
ev_break(main_loop,EVBREAK_ALL);
}
int main(int argc,char **argv)
{
ev_signal signal_w;
struct ev_loop *main_loop = ev_default_loop(0);
ev_init(&signal_w,signal_action);
ev_signal_set(&signal_w,SIGINT);
ev_signal_start(main_loop,&signal_w);
ev_run(main_loop,0);
return 0;
}
代码功能:
应用程序由ctrl+c等结束信号触发时,执行回调函数signal_action();