定时器事件demo

test_timer/makefile

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+test_timer:test_timer.cpp
+	g++ $^ -o $@ -levent

test_timer/test_timer.cpp

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+#include <iostream>
+#include <event2/event.h>
+#include <string.h>
+#include <thread>
+#ifdef _WIN32
+	
+#else
+	#include <signal.h>
+#endif // !_WIN32
+
+using namespace std;
+static timeval t1 = {1,0};
+void timer1(int sock,short which, void *arg){
+    cout << "[timer1]" <<    flush;
+    event* ev = (event*)arg;
+    if(!evtimer_pending(ev,&t1) ){
+        evtimer_del(ev);
+        evtimer_add(ev,&t1);
+    }
+}
+
+void timer2(int sock,short which, void *arg){
+    cout << "[timer2]" <<    flush;
+    this_thread::sleep_for(3000ms); //c++ 11
+}
+void timer3(int sock,short which, void *arg){
+    cout << "[timer3]" <<    flush;
+}
+
+int main(int agrc,char** agrv){
+#ifdef _WIN32
+	//初始化socket库
+	WSADATA wsa;
+	WSAStartup(MAKEWORD(2, 2), &wsa);
+#else 
+	if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) { //忽略管道信号，发送数据给已关闭的socket，会飞掉！
+		return 1;
+	}
+#endif
+
+    event_base *base = event_base_new();
+
+    //定时器
+    cout << "test timer" << endl;
+
+    //非持久定时器 只进入一次
+    event* evl = evtimer_new(base ,timer1,event_self_cbarg());
+    if(evl == NULL){
+        cout << "evtimer_new timer1 failed!" <<endl;
+        return -1;
+    }
+    evtimer_add(evl,&t1);
+
+
+    static timeval t2;
+    t2.tv_sec = 1;
+    t2.tv_usec = 200000; //微秒
+    event *ev2 = event_new(base,-1,EV_PERSIST,timer2,0);
+    event_add(ev2,&t2);
+
+
+    //超时性能优化，默认event用二叉堆存储，插入删除 时间复杂度为O(logN)
+    //优化到双向队列 插入删除O(1)
+    event *ev3 = event_new(base,-1,EV_PERSIST,timer3,0);
+    static timeval tv_in = {3,0};
+    const timeval * t3;
+    t3 = event_base_init_common_timeout(base,&tv_in);
+    event_add(ev3,t3);
+    
+    //进入事件主循环
+    event_base_dispatch(base);
+
+    event_free(evl);
+    event_free(ev2);
+
+    event_base_free(base);
+   
+    return 0;
+
+}