libevent 信号示例

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#include <sys/types.h>       #include <event2/event-config.h>       #include <sys/stat.h> #ifndef WIN32 #include <sys/queue.h> #include <unistd.h> #include <sys/time.h> #else #include <winsock2.h> #include <windows.h> #endif #include <signal.h> #include <fcntl.h> #include <stdlib.h> #include <stdio.h> #include <string.h> #include <errno.h>       #include <event.h>       #ifdef _EVENT___func__ #define __func__ _EVENT___func__ #endif       int called = 0;       static void signal_cb(evutil_socket_t fd, short event, void *arg) {     struct event *signal = arg;           printf("%s: got signal %d\n", __func__, EVENT_SIGNAL(signal));           if (called >= 2)     {         event_del(signal);     }           called++; }       int main(int argc, char **argv) {     struct event signal_int;     struct event_base* base;           base = event_base_new();     event_assign(&signal_int, base, SIGINT, EV_SIGNAL|EV_PERSIST, signal_cb, &signal_int);      event_add(&signal_int, NULL);           event_base_dispatch(base);     event_base_free(base);           return 0; }

这个信号示例是在Linux下测试的，程序执行时在键盘连续输入CTRL+C,打印如下：

CTRL+C即SIGINT，值为2。