1.4 \u5347\u5e8f\u94fe\u8868\u6838\u5fc3\u64cd\u4f5c<\/h4>\n
\u5b9a\u65f6\u5668\u94fe\u8868\u662f\u4e00\u4e2a\u5347\u5e8f\u3001\u53cc\u5411\u94fe\u8868，\u5e26\u6709\u5934\u7ed3\u70b9\u548c\u5c3e\u8282\u70b9：<\/p>\n
\/\/\u5b9a\u65f6\u5668\u94fe\u8868，\u662f\u4e00\u4e2a\u5347\u5e8f，\u53cc\u5411\u94fe\u8868，\u5e26\u6709\u5934\u7ed3\u70b9\u548c\u5c3e\u8282\u70b9
\nclass sort_timer_lst
\n{
\npublic:
\n sort_timer_lst():head(NULL),tail(NULL){}
\n \/\/\u94fe\u8868\u88ab\u9500\u6bc1\u65f6，\u5220\u9664\u91cc\u9762\u6240\u6709\u5b9a\u65f6\u5668
\n ~sort_timer_lst()
\n {
\n util_timer*tmp=head;
\n while(tmp)
\n {
\n head = tmp->next;
\n delete tmp;
\n tmp = head;
\n }
\n }<\/p>\n
\/\/\u5c06\u76ee\u6807\u5b9a\u65f6\u5668timer\u6dfb\u52a0\u5230\u94fe\u8868\u4e2d
\n void add_timer(util_timer* timer)
\n {
\n if(!timer)
\n {\/\/timer\u4e3a\u7a7a\u8fd4\u56de
\n return;
\n }
\n if(!head)
\n {\/\/\u94fe\u8868\u4e3a\u7a7a
\n head = tail = timer;
\n return;
\n }<\/p>\n
\/\/\u5982\u679ctimer\u7684\u8d85\u65f6\u65f6\u95f4\u5c0f\u4e8e\u94fe\u8868\u4e2d\u7684\u6240\u6709\u5b9a\u65f6\u5668\u7684\u8d85\u65f6\u65f6\u95f4，\u628atimer\u63d2\u5165\u5934\u90e8，\u5426\u5219
\n \/\/\u8c03\u7528\u91cd\u6784\u51fd\u6570add_timer(timer,lst_head)\u628a\u5b83\u63d2\u5165\u5408\u9002\u4f4d\u7f6e，\u4fdd\u8bc1\u94fe\u8868\u7684\u5347\u5e8f
\n if(timer->expire<head->expire)
\n {
\n timer->next = head;
\n head->prev= timer;
\n head =timer;
\n return;
\n }
\n add_timer(timer,head);
\n }<\/p>\n
\/\/\u5f53\u67d0\u4e2a\u5b9a\u65f6\u4efb\u52a1\u53d1\u751f\u53d8\u5316\u65f6，\u8c03\u6574timer\u7684\u4f4d\u7f6e，\u8fd9\u4e2a\u51fd\u6570\u53ea\u8003\u8651timer\u8d85\u65f6\u65f6\u95f4\u5ef6\u957f\u60c5\u51b5，\u5373timer\u53ea\u5f80\u94fe\u8868\u5c3e\u90e8\u79fb\u52a8
\n void adjust_timer(util_timer* timer)
\n {
\n if(!timer) return;\/\/timer\u4e3a\u7a7a
\n util_timer*tmp = timer->next;
\n \/\/\u5982\u679ctimer\u5728\u5c3e\u90e8，\u6216timer\u7684\u8d85\u65f6\u503c\u4ecd\u5c0f\u4e8e\u4e0b\u4e00\u4e2atimer\u5219\u4e0d\u7528\u8c03\u6574
\n if(!tmp||(timer->expire<tmp->expire)) return;<\/p>\n
\/\/\u5982\u679c\u76ee\u6807\u5b9a\u65f6\u5668\u662f\u94fe\u8868\u7684\u5934\u7ed3\u70b9，\u5219\u5c06\u5b9a\u65f6\u5668\u4ece\u94fe\u8868\u53d6\u51fa\u91cd\u65b0\u63d2\u5165\u94fe\u8868
\n if(timer==head)
\n {
\n head=head->next;
\n head->prev = NULL;
\n timer->next = NULL;
\n add_timer(timer,head);
\n }else
\n {\/\/\u5982\u679ctimer\u4e0d\u662f\u5934\u7ed3\u70b9，\u4ece\u94fe\u8868\u53d6\u51fa，\u63d2\u5165\u539f\u6765\u4f4d\u7f6e\u7684\u540e\u9762\u90e8\u5206\u94fe\u8868\u4e2d
\n timer->prev->next = timer->next;
\n timer->next->prev = timer->prev;
\n add_timer(timer,timer->next);
\n }
\n }<\/p>\n
\/\/\u5c06timer\u4ece\u94fe\u8868\u4e2d\u5220\u9664
\n void del_timer(util_timer* timer)
\n {
\n if(!timer) return;\/\/\u4e3a\u7a7a
\n if((timer==head)&&(timer==tail))\/\/\u94fe\u8868\u4e2d\u53ea\u6709\u4e00\u4e2a\u5b9a\u65f6\u5668
\n {
\n delete timer;
\n head=NULL;
\n tail = NULL;
\n return;
\n }<\/p>\n
\/\/\u5982\u679c\u94fe\u8868\u4e2d\u6709\u81f3\u5c11\u4e24\u4e2a\u5b9a\u65f6\u5668，\u4e14timer\u662f\u5934\u7ed3\u70b9，\u5219\u5c06\u5934\u7ed3\u70b9\u8bbe\u7f6e\u4e3atimer\u7684\u4e0b\u4e00\u4e2a
\n if(timer == head)
\n {
\n head = head->next;
\n head->prev = NULL;
\n delete timer;
\n return;
\n }
\n \/\/\u5982\u679c\u94fe\u8868\u6709\u81f3\u5c11\u4e24\u4e2a\u5b9a\u65f6\u5668，\u4e14timer\u662f\u5c3e\u8282\u70b9，\u5219\u5c06\u5c3e\u8282\u70b9\u8bbe\u4e3atimer\u524d\u4e00\u4e2a\u8282\u70b9
\n if(timer == tail)
\n {
\n tail = tail->prev;
\n tail->next = NULL;
\n delete timer;
\n return;
\n }
\n \/\/\u5982\u679ctimer\u4f4d\u4e8e\u4e2d\u95f4，\u628a\u5b83\u524d\u540e\u7684\u5b9a\u65f6\u5668\u8fde\u8d77\u6765
\n timer->prev->next = timer->next;
\n timer->next->prev = timer->prev;
\n delete timer;
\n }<\/p>\n
\/\/SIGALRM\u4fe1\u53f7\u6bcf\u6b21\u88ab\u89e6\u53d1\u5c31\u5728\u5904\u7406\u4fe1\u53f7\u51fd\u6570\u91cc\u6267\u884c\u4e00\u6b21tick\u51fd\u6570，\u5904\u7406\u94fe\u8868\u4e2d\u5230\u671f\u4efb\u52a1
\n void tick()
\n {
\n if(!head) return;
\n printf("timer tick\\\\n");
\n time_t cur = time(NULL);\/\/\u83b7\u5f97\u7cfb\u7edf\u5f53\u524d\u65f6\u95f4
\n util_timer*tmp = head;
\n \/\/\u4ece\u5934\u8282\u70b9\u5f00\u59cb\u904d\u5386，\u76f4\u5230\u9047\u5230\u4e00\u4e2a\u672a\u5230\u671f\u7684\u5b9a\u65f6\u5668
\n while(tmp)
\n {
\n \/\/\u56e0\u4e3a\u6bcf\u4e2a\u5b9a\u65f6\u5668\u90fd\u662f\u7528\u7edd\u5bf9\u65f6\u95f4\u505a\u503c，\u6240\u4ee5\u53ef\u4ee5\u76f4\u63a5\u6bd4\u8f83timer\u7684\u8d85\u65f6\u503c\u548ccur
\n if(cur<tmp->expire) break;\/\/\u672a\u8d85\u65f6
\n \/\/\u8c03\u7528\u5b9a\u65f6\u5668\u7684\u56de\u8c03\u51fd\u6570，\u6267\u884c\u5b9a\u65f6\u4efb\u52a1
\n tmp->cb_func(tmp->user_data);\/\/\u4f20\u5165\u5ba2\u6237\u6570\u636e
\n head = tmp->next;
\n if(head)
\n {
\n head->prev = NULL;
\n }
\n delete tmp;
\n tmp = head;
\n }
\n }<\/p>\n
private:
\n \/\/\u91cd\u6784\u8f85\u52a9\u51fd\u6570add_timer，\u5c06timer\u6dfb\u52a0\u5230\u5f53\u524d\u4f4d\u7f6e\u7684\u540e\u9762\u90e8\u5206\u94fe\u8868\u4e2d
\n void add_timer(util_timer* timer,util_timer*lst_head)
\n {
\n util_timer* prev=lst_head;
\n util_timer* tmp = prev->next;
\n \/\/\u904d\u5386lst_head\u8282\u70b9\u4e4b\u540e\u7684\u90e8\u5206\u94fe\u8868，\u76f4\u5230\u627e\u5230\u4e00\u4e2a\u8d85\u65f6\u65f6\u95f4\u5927\u4e8etimer\u7684\u8282\u70b9，\u5c06timer\u63d2\u5165\u8be5\u8282\u70b9\u524d
\n while(tmp)
\n {
\n if(timer->expire<tmp->expire)
\n {
\n prev->next =timer;
\n timer->next = tmp;
\n tmp->prev = timer;
\n timer->prev = prev;
\n break;
\n }
\n prev = tmp;
\n tmp = tmp->next;
\n }
\n \/\/\u5982\u679c\u904d\u5386\u5b8clst_head\u4e4b\u540e\u7684\u94fe\u8868，\u4ecd\u7136\u627e\u4e0d\u5230，\u5c31\u628atimer\u4f5c\u4e3a\u5c3e\u8282\u70b9
\n if(!tmp)
\n {
\n prev->next = timer;
\n timer->prev = prev;
\n timer->next = NULL;
\n tail = timer;
\n }
\n }
\nprivate:
\n util_timer*head;
\n util_timer*tail;
\n};<\/p>\n
\u8fd9\u4e2a\u7c7b\u91cc\u5927\u90e8\u5206\u90fd\u662f\u94fe\u8868\u7684\u57fa\u7840\u64cd\u4f5c，\u6311\u4e9b\u5173\u952e\u7684\u6765\u770b\u4e0b：<\/p>\n
- \n
- add_timer：\u904d\u5386\u94fe\u8868，\u5c06\u65b0\u5b9a\u65f6\u5668\u63d2\u5165\u5230\u5408\u9002\u4f4d\u7f6e，\u4fdd\u8bc1\u94fe\u8868\u6309\u8d85\u65f6\u65f6\u95f4\u5347\u5e8f\u6392\u5217<\/li>\n
- adjust_timer：\u5ba2\u6237\u7aef\u53d1\u6570\u636e\u65f6，\u5ef6\u957f\u8d85\u65f6\u65f6\u95f4，\u5c06\u5b9a\u65f6\u5668\u5f80\u94fe\u8868\u5c3e\u90e8\u79fb\u52a8<\/li>\n
- del_timer：\u5ba2\u6237\u7aef\u4e0b\u7ebf\u6216\u8d85\u65f6，\u5c06\u5b9a\u65f6\u5668\u4ece\u94fe\u8868\u4e2d\u5220\u9664<\/li>\n
- tick：SIGALRM \u4fe1\u53f7\u6bcf 5 \u79d2\u89e6\u53d1\u4e00\u6b21，\u626b\u63cf\u94fe\u8868\u5934\u90e8，\u6e05\u7406\u6240\u6709\u5230\u671f\u7684\u5b9a\u65f6\u5668<\/li>\n<\/ul>\n
\u5728adjust_timer\u4e2d，\u56e0\u4e3a timer \u5ef6\u65f6\u4e00\u5b9a\u4f1a\u63d2\u5165\u5728\u539f\u6765\u4f4d\u7f6e\u7684\u540e\u9762，\u6240\u4ee5\u8c03\u7528 add_timer \u7684\u91cd\u6784\u51fd\u6570，\u4f20\u5165 timer \u548c\u5f53\u524d\u7684\u4e0b\u4e00\u4e2a\u4f4d\u7f6e\u3002<\/p>\n
\n\u4e8c\u3001\u670d\u52a1\u5668\u96c6\u6210\u5b9a\u65f6\u5668\u5b8c\u6574\u6d41\u7a0b<\/h3>\n
\u901a\u8fc7alarm\u8bbe\u7f6e 5 \u79d2\u89e6\u53d1\u4e00\u6b21 SIGALRM \u4fe1\u53f7，\u8c03\u7528\u4fe1\u53f7\u7684\u56de\u8c03\u51fd\u6570，\u901a\u8fc7\u7ba1\u9053\u53d1\u9001\u5bf9\u5e94\u4fe1\u53f7，\u5728epoll_wait\u5904\u963b\u585e\u7b49\u5f85\u68c0\u67e5\u94fe\u8868\u662f\u5426\u6709\u8d85\u65f6 timer，\u5f53\u5ba2\u6237\u7aef\u8d85\u65f6\u6216\u65ad\u5f00\u94fe\u63a5\u7b49\u60c5\u51b5\u5206\u522b\u8c03\u7528\u5bf9\u5e94\u51fd\u6570\u3002<\/p>\n
2.1 \u4fe1\u53f7\u5904\u7406\u4e0e\u7edf\u4e00\u4e8b\u4ef6\u6e90（\u6838\u5fc3）<\/h4>\n
\u5177\u4f53\u5148\u6765\u770b\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u8fd9\u4e00\u5757：<\/p>\n
void sig_handler(int sig)
\n{
\n int save_errno = errno;\/\/\u5b58\u50a8\u539f\u6765\u7684errno,\u56e0\u4e3a send \u51fd\u6570\u53ef\u80fd\u4fee\u6539 errno
\n int msg =sig;\/\/\u628a\u4fe1\u53f7\u7f16\u53f7\u5b58\u4e3a\u53d8\u91cf
\n send(pipefd[1],(char*)&msg,1,0);\/\/\u5f80\u7ba1\u9053\u5199\u7aef\u53d1\u9001\u4fe1\u53f7\u7f16\u7801
\n errno=save_errno;\/\/\u6062\u590d errno，\u4fdd\u8bc1\u4e0d\u5f71\u54cd\u4e3b\u7a0b\u5e8f\u7684\u9519\u8bef\u5904\u7406
\n}<\/p>\nvoid addsig(int sig)
\n{
\n struct sigaction sa;\/\/\u5b9a\u4e49\u4fe1\u53f7\u914d\u7f6e\u7ed3\u6784\u4f53
\n memset(&sa,'\\\\0',sizeof(sa));\/\/\u6e05\u7a7a\u7ed3\u6784\u4f53\u5185\u5b58，\u907f\u514d\u810f\u6570\u636e
\n sa.sa_handler=sig_handler;\/\/\u4fe1\u53f7\u89e6\u53d1\u65f6，\u64cd\u4f5c\u7cfb\u7edf\u81ea\u52a8\u8c03\u7528 sig_handler
\n sa.sa_flags |= SA_RESTART;\/\/\u9632\u6b62\u7a0b\u5e8f\u56e0\u4e3a\u4fe1\u53f7\u4e2d\u65ad\u62a5\u9519，\u88ab\u6253\u65ad\u5c31\u91cd\u542f
\n sigfillset(&sa.sa_mask);\/\/\u5904\u7406\u5f53\u524d\u4fe1\u53f7\u65f6，\u5c4f\u853d\u6240\u6709\u5176\u4ed6\u4fe1\u53f7
\n assert(sigaction(sig,&sa,NULL)!=-1);\/\/\u5c06\u914d\u7f6e\u5e94\u7528\u5230\u4fe1\u53f7 sig
\n}<\/p>\n\u5728\u4e3b\u7a0b\u5e8f\u4e2d，\u901a\u8fc7addsig\u51fd\u6570\u6ce8\u518c SIGALRM (\u95f9\u949f\u4fe1\u53f7) \u548c SIGTERM (\u5173\u95ed\u4fe1\u53f7)\u3002<\/p>\n
sigaction\u7cfb\u7edf\u8c03\u7528\u7c7b\u4f3c\u4e8esignal，\u4f46\u6bd4signal\u66f4\u5065\u58ee：<\/p>\n
#include <signal.h>
\nint sigaction( int sig, const struct sigaction* act, struct sigaction* oact );
\n\/\/sig \u53c2\u6570\u6307\u51fa\u8981\u6355\u83b7\u7684\u4fe1\u53f7\u7c7b\u578b
\n\/\/act \u53c2\u6570\u6307\u5b9a\u65b0\u7684\u4fe1\u53f7\u5904\u7406\u65b9\u5f0f
\n\/\/oact \u53c2\u6570\u5219\u8f93\u51fa\u4fe1\u53f7\u5148\u524d\u7684\u5904\u7406\u65b9\u5f0f（\u5982\u679c\u4e0d\u4e3a NULL \u7684\u8bdd）<\/p>\nact \u548c oact \u90fd\u662f sigaction \u7ed3\u6784\u4f53\u7c7b\u578b\u7684\u6307\u9488，sigaction \u7ed3\u6784\u4f53\u63cf\u8ff0\u4e86\u4fe1\u53f7\u5904\u7406\u7684\u7ec6\u8282：<\/p>\n
struct sigaction
\n{
\n#ifdef __USE_POSIX199309
\n union
\n {
\n _sighandler_t sa_handler;
\n \/\/\u56de\u8c03\u51fd\u6570
\n void (*sa_sigaction) ( int, siginfo_t*, void* );
\n }
\n _sigaction_handler;
\n# define sa_handler _sigaction_handler.sa_handler
\n# define sa_sigaction _sigaction_handler.sa_sigaction
\n#else
\n _sighandler_t sa_handler;
\n#endif<\/p>\n_sigset_t sa_mask;
\n int sa_flags;
\n void (*sa_restorer) (void);
\n};
\n \/\/\u8be5\u7ed3\u6784\u4f53\u4e2d\u7684 sa_handler \u6210\u5458\u6307\u5b9a\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u3002
\n\/\/sa_mask \u6210\u5458\u8bbe\u7f6e\u8fdb\u7a0b\u7684\u4fe1\u53f7\u63a9\u7801,\u4ee5\u6307\u5b9a\u54ea\u4e9b\u4fe1\u53f7\u4e0d\u80fd\u53d1\u9001\u7ed9\u672c\u8fdb\u7a0b
\n\/\/sa_mask \u662f\u4fe1\u53f7\u96c6 sigset_t\u7c7b\u578b，\u8be5\u7c7b\u578b\u6307\u5b9a\u4e00\u7ec4\u4fe1\u53f7\u3002
\n\/\/sa_flags \u6210\u5458\u7528\u4e8e\u8bbe\u7f6e\u7a0b\u5e8f\u6536\u5230\u4fe1\u53f7\u65f6\u7684\u884c\u4e3a<\/p>\n\u5176\u4e2dsa_flags\u53c2\u6570\u5982\u4e0b，\u5728addsig\u51fd\u6570\u4e2dsa_flags\u8bbe\u4e3aSA_RESTART，\u88ab\u4fe1\u53f7\u6253\u65ad\u7684\u7cfb\u7edf\u8c03\u7528 (epoll_wait \u7b49) \u4f1a\u81ea\u52a8\u91cd\u65b0\u542f\u52a8\u3002<\/p>\n
![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260725043318-6a643c8e55b97.png\")
<\/p>\n\u5728sa\u8bbe\u7f6e\u7684\u56de\u8c03\u51fd\u6570sig_handler\u4e2d，\u901a\u8fc7\u7ba1\u9053\u901a\u77e5\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n
\u4e3a\u4ec0\u4e48\u8981\u7528\u7ba1\u9053？ \u56e0\u4e3a\u4fe1\u53f7\u662f\u5f02\u6b65\u4e2d\u65ad，\u76f4\u63a5\u5904\u7406\u4f1a\u5bfc\u81f4\u7a0b\u5e8f\u4e71\u6570\u636e\u7b49 (\u6bd4\u5982timer_lst.tick()\u4f1a\u4fee\u6539\u94fe\u8868，\u662f\u975e\u53ef\u91cd\u5165\u51fd\u6570)\u3002\u901a\u8fc7\u7ba1\u9053\u5c06\u4e0d\u5b89\u5168\u7684\u5f02\u6b65\u4fe1\u53f7\u53d8\u4e3a\u5b89\u5168\u7684 IO \u4e8b\u4ef6，\u4ea4\u7ed9 epoll \u7edf\u4e00\u7ba1\u7406，\u8fd9\u5c31\u662f\u7edf\u4e00\u4e8b\u4ef6\u6e90\u7684\u6838\u5fc3\u601d\u60f3\u3002<\/p>\n
2.2 \u5b9a\u65f6\u5668\u5fc3\u8df3\u4e0e\u8d85\u65f6\u5904\u7406<\/h4>\n
void timer_handler()
\n{
\n \/\/\u5b9a\u65f6\u5904\u7406\u4efb\u52a1，\u5b9e\u9645\u4e0a\u5c31\u662f\u4f7f\u7528tick\u51fd\u6570
\n timer_lst.tick();
\n \/\/\u56e0\u4e3a\u4e00\u6b21alarm\u8c03\u7528\u53ea\u4f1a\u5f15\u8d77\u4e00\u6b21SIGALRM\u4fe1\u53f7，\u6240\u4ee5\u8981\u91cd\u65b0\u5b9a\u65f6
\n alarm(TIMESLOT);
\n}<\/p>\n\u5f53 epoll_wait \u68c0\u6d4b\u5230\u7ba1\u9053\u7684 SIGALRM \u4fe1\u53f7\u540e，\u4f1a\u6267\u884ctimer_handler\u51fd\u6570\u5904\u7406\u8d85\u65f6\u7684 timer \u5e76\u91cd\u8bbe alarm\u3002<\/p>\n
\/\/\u5b9a\u65f6\u5668\u56de\u8c03\u51fd\u6570，\u5b83\u5220\u9664\u975e\u6d3b\u52a8\u94fe\u63a5socket\u4e0a\u7684\u6ce8\u518c\u4e8b\u4ef6，\u5e76\u5173\u95edfd
\nvoid cb_func(client_data*user_data)
\n{
\n epoll_ctl(epollfd,EPOLL_CTL_DEL,user_data->socket,0);
\n assert(user_data);
\n close(user_data->socket);
\n printf("close fd %d\\\\n",user_data->socket);
\n}<\/p>\n\u5728\u65b0\u5ba2\u6237\u7aef\u94fe\u63a5\u65f6，\u5c06\u8fd9\u4e2a\u56de\u8c03\u51fd\u6570\u6ce8\u518c\u5230client_data\u91cc，\u5728 timer \u68c0\u6d4b\u5230\u8d85\u65f6\u540e，\u8c03\u7528\u56de\u8c03\u51fd\u6570，\u5220\u9664 epoll \u6ce8\u518c\u4e8b\u4ef6，\u5173\u95ed fd\u3002<\/p>\n
2.3 \u670d\u52a1\u5668\u521d\u59cb\u5316<\/h4>\n
\u5728 main \u51fd\u6570\u4e2d\u521b\u5efa\u5168\u53cc\u5de5\u65e0\u540d\u7ba1\u9053，\u8bbe\u7f6e\u7ba1\u9053\u5199\u7aef\u975e\u963b\u585e\u5e76\u6ce8\u518c\u5230 epoll \u91cc\u3002\u901a\u8fc7addsig\u6355\u83b7 SIGALRM \u548c SIGTERM \u4fe1\u53f7\u3002<\/p>\n
\u521b\u5efa\u7528\u6237\u4fe1\u606f\u6570\u7ec4users，\u8bbe\u7f6e alarm \u5b9a\u65f6\u4fe1\u53f7：<\/p>\n
\/\/…\u5f88\u591a\u4ee3\u7801
\n epoll_event events[MAX_EVENT_NUMBER];
\n epollfd = epoll_create(5);
\n assert(epollfd!=-1);
\n addfd(epollfd,listenfd);<\/p>\n\/\/\u521b\u5efa\u5168\u53cc\u5de5\u65e0\u540d\u7ba1\u9053
\n ret = socketpair(PF_UNIX,SOCK_STREAM,0,pipefd);
\n assert(ret != -1);
\n \/\/\u907f\u514d\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u963b\u585e
\n setnonblocking(pipefd[1]);
\n addfd(epollfd,pipefd[0]);<\/p>\n\/\/\u8bbe\u7f6e\u4fe1\u53f7\u5904\u7406\u51fd\u6570
\n \/\/\u95f9\u949f\u5b9a\u65f6\u4fe1\u53f7
\n addsig(SIGALRM);
\n \/\/\u7a0b\u5e8f\u7ec8\u6b62\u4fe1\u53f7
\n addsig(SIGTERM);
\n bool stop_server = false;<\/p>\n\/\/\u7528\u6237\u4fe1\u606f\u6570\u7ec4
\n client_data* users = new client_data[FD_LIMIT];
\n bool timeout = false;
\n alarm(TIMESLOT);\/\/\u5b9a\u65f6<\/p>\n\/\/\u5f88\u591a\u4ee3\u7801…<\/p>\n
2.4 epoll \u4e8b\u4ef6\u5faa\u73af\u4e0e\u5b9a\u65f6\u5668\u8054\u52a8<\/h4>\n
epoll \u4f1a\u5904\u7406\u4e09\u7c7b\u6838\u5fc3\u4e8b\u4ef6，\u5206\u522b\u5bf9\u5e94\u5b9a\u65f6\u5668\u7684\u4e0d\u540c\u64cd\u4f5c：<\/p>\n
\u4e8b\u4ef6 1：\u65b0\u7684\u5ba2\u6237\u7aef\u94fe\u63a5<\/h5>\n
\u6dfb\u52a0\u5230\u7528\u6237\u4fe1\u606f\u6570\u7ec4users\u91cc，\u521b\u5efa\u5b9a\u65f6\u5668，\u5c06\u8d1f\u8d23\u68c0\u67e5\u8d85\u65f6\u7684\u56de\u8c03\u51fd\u6570\u8d4b\u503c\u7ed9cb_func，\u8bbe\u7f6eexpire\u4e3a\u5f53\u524d\u65f6\u95f4 + 15 \u79d2\u7684\u7edd\u5bf9\u65f6\u95f4\u3002\u5e76\u8fdb\u884c\u53cc\u5411\u7ed1\u5b9a，\u6dfb\u52a0\u5230\u94fe\u8868\u4e2d：<\/p>\n
int sockfd = events[i].data.fd;
\n \/\/\u5904\u7406\u65b0\u5230\u7684\u5ba2\u6237\u94fe\u63a5
\n if(sockfd == listenfd)
\n {
\n struct sockaddr_in client_address;
\n socklen_t client_addrlength = sizeof(client_address);
\n int connfd = accept(listenfd,(struct sockaddr*)&client_address,&client_addrlength);<\/p>\naddfd(epollfd,connfd);
\n users[connfd].address = client_address;
\n users[connfd].socket=connfd;<\/p>\n\/\/\u521b\u5efa\u5b9a\u65f6\u5668，\u8bbe\u7f6e\u56de\u8c03\u51fd\u6570\u548c\u8d85\u65f6\u65f6\u95f4，\u7ed1\u5b9a\u5b9a\u65f6\u5668\u4e0e\u7528\u6237\u6570\u636e，\u6dfb\u52a0\u5230timer\u94fe\u8868\u4e2d
\n util_timer* timer = new util_timer;
\n timer->user_data = &users[connfd];
\n timer->cb_func = cb_func;\/\/\u8bbe\u7f6e\u56de\u8c03\u51fd\u6570
\n time_t cur = time(NULL);
\n \/\/\u8bbe\u7f6e\u5b9a\u65f6\u5668\u7684\u3010\u8d85\u65f6\u65f6\u95f4\u3011= \u5f53\u524d\u65f6\u95f4 + 15\u79d2
\n timer->expire = cur+3*TIMESLOT;
\n \/\/\u8ba9\u5ba2\u6237\u7aef\u6570\u636e\u8bb0\u5f55\u81ea\u5df1\u7684\u5b9a\u65f6\u5668
\n users[connfd].timer = timer;
\n timer_lst.add_timer(timer);<\/p>\n\u4e8b\u4ef6 2：\u7ba1\u9053\u7684\u8bfb\u4e8b\u4ef6<\/h5>\n
\u5c06\u4fe1\u53f7\u8d4b\u7ed9signals\u6570\u7ec4\u63a5\u6536，\u904d\u5386\u6240\u6709\u89e6\u53d1\u7684\u4fe1\u53f7\u3002\u5982\u679c\u662f SIGALRM \u5c31\u6807\u8bb0\u5b9a\u65f6\u4efb\u52a1\u5728\u6700\u540e\u5904\u7406，\u5982\u679c\u662f SIGTERM \u5c31\u4f18\u96c5\u5173\u95ed\u670d\u52a1\u5668：<\/p>\n
}else if((sockfd == pipefd[0])&&(events[i].events&EPOLLIN))
\n {
\n int sig;
\n char signals[1024];
\n ret = recv(pipefd[0],signals,sizeof(signals),0);
\n if(ret == -1)
\n {
\n continue;\/\/\u51fa\u9519
\n }
\n else if(ret == 0)
\n {
\n continue;
\n }
\n else{
\n for(int i=0;i<ret;i++)
\n {
\n switch(signals[i])
\n {
\n case SIGALRM:
\n {\/\/\u7528timeout\u6807\u8bb0\u6709\u5b9a\u65f6\u4efb\u52a1，\u56e0\u4e3a\u5b9a\u65f6\u4efb\u52a1\u4f18\u5148\u7ea7\u4e0d\u9ad8，\u4f18\u5148\u5904\u7406\u522b\u7684
\n timeout = true;
\n break;
\n }
\n case SIGTERM:
\n {
\n stop_server = true;
\n }
\n }
\n }
\n }<\/p>\n\u4e8b\u4ef6 3：\u5ba2\u6237\u7aef\u8bfb\u4e8b\u4ef6<\/h5>\n
\u5982\u679c\u63a5\u6536\u6570\u636e\u9519\u8bef\u6216\u8005\u5ba2\u6237\u7aef\u4e0b\u7ebf\u5c31\u8c03\u7528cb_func\u56de\u8c03\u51fd\u6570，\u5e76\u79fb\u9664\u5b9a\u65f6\u5668\u3002\u5982\u679c\u6b63\u5e38\u63a5\u6536\u6d88\u606f，\u5c31\u5ef6\u957f\u5bf9\u5e94 timer \u7684expire\u65f6\u95f4\u5e76\u8c03\u7528adjust_timer\u51fd\u6570\u8c03\u6574：<\/p>\n
} else if(events[i].events&EPOLLIN)
\n {
\n memset(users[sockfd].buf,'\\\\0',BUFFER_SIZE);
\n ret = recv(sockfd,users[sockfd].buf,BUFFER_SIZE-1,0);
\n printf("get %d bytes of client data %s from %d\\\\n",ret,users[sockfd].buf,sockfd);
\n util_timer* timer = users[sockfd].timer;
\n if(ret < 0)
\n {
\n \/\/\u53d1\u751f\u9519\u8bef，\u5173\u95ed\u8fde\u63a5\u5e76\u79fb\u9664\u5b9a\u65f6\u5668
\n if(errno!=EAGAIN)
\n {
\n cb_func(&users[sockfd]);
\n if(timer){
\n timer_lst.del_timer(timer);
\n }
\n }
\n }else if(ret == 0)
\n {\/\/\u5bf9\u7aef\u5173\u95ed\u8fde\u63a5，\u8fd9\u8fb9\u4e5f\u5173\u95ed\u8fde\u63a5，\u5e76\u79fb\u9664\u5bf9\u5e94\u5b9a\u65f6\u5668
\n cb_func(&users[sockfd]);
\n if(timer)
\n {
\n timer_lst.del_timer(timer);
\n }
\n }
\n else{
\n \/\/\u5982\u679c\u67d0\u4e2a\u5ba2\u6237\u8fde\u63a5\u6709\u6570\u636e\u53ef\u8bfb，\u4e5f\u9700\u8981\u8c03\u6574\u5bf9\u5e94\u7684timer，\u5ef6\u8fdf\u5173\u95ed\u7684\u65f6\u95f4
\n if(timer)
\n {
\n time_t cur = time(NULL);
\n timer->expire = cur + 3*TIMESLOT;
\n printf("adjust timer once\\\\n");
\n timer_lst.adjust_timer(timer);
\n }
\n }<\/p>\n}<\/p>\n
\u5728\u6700\u540e\u5904\u7406\u5b9a\u65f6\u4e8b\u4ef6，\u5982\u679ctimeout\u4e3a true，\u5c31\u8c03\u7528timer_handler，\u7528tick\u5904\u7406\u8d85\u65f6 timer，\u5e76\u91cd\u65b0 alarm \u5b9a\u65f6：<\/p>\n
\/\/\u6700\u540e\u5904\u7406\u5b9a\u65f6\u4e8b\u4ef6，\u56e0\u4e3aIO\u4e8b\u4ef6\u4f18\u5148\u7ea7\u66f4\u9ad8
\n if(timeout){
\n timer_handler();
\n timeout = false;
\n } <\/p>\n![\"\"](\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/07\/20260725043318-6a643c8e7ef26.png\")
<\/p>\n\u4e09\u3001\u5b8c\u6574\u53ef\u8fd0\u884c\u4ee3\u7801<\/h3>\n
\u7f16\u8bd1\u547d\u4ee4：g++ main.cpp -o server -Wall \u8fd0\u884c\u547d\u4ee4：.\/server ip\u00a0\u7aef\u53e3 \u6d4b\u8bd5\u547d\u4ee4：\u65b0\u5f00\u7ec8\u7aef\u6267\u884c nc ip\u00a0\u7aef\u53e3<\/p>\n
lst_timer.h<\/h4>\n
#ifndef LST_TIMER
\n#define LST_TIMER<\/p>\n#include <time.h>
\n#include <sys\/socket.h>
\n#include <netinet\/in.h>
\n#include <arpa\/inet.h>
\n#include <assert.h>
\n#include <stdio.h>
\n#include <unistd.h>
\n#include <stdlib.h>
\n#include <errno.h>
\n#include <string.h>
\n#include <sys\/types.h>
\n#include <sys\/stat.h>
\n#include <fcntl.h>
\n#include <sys\/sendfile.h>
\n#include<sys\/epoll.h>
\n#include<pthread.h>
\n#include <signal.h>
\n#define BUFFER_SIZE 64<\/p>\nclass util_timer; \/\/\u63d0\u524d\u58f0\u660e<\/p>\n
struct client_data
\n{
\n sockaddr_in address; \/\/\u5ba2\u6237\u7aefsocket\u5730\u5740
\n int socket; \/\/socket\u6587\u4ef6\u63cf\u8ff0\u7b26
\n char buf[BUFFER_SIZE]; \/\/\u8bfb\u7f13\u5b58
\n util_timer *timer; \/\/\u5b9a\u65f6\u5668
\n};<\/p>\n\/\/ \u5b9a\u65f6\u5668\u7c7b<\/p>\n
class util_timer
\n{
\npublic:
\n util_timer() : prev(NULL), next(NULL) {}<\/p>\npublic:
\n time_t expire; \/\/\u4efb\u52a1\u7684\u8d85\u65f6\u65f6\u95f4，\u7528\u7edd\u5bf9\u65f6\u95f4
\n \/\/\u51fd\u6570\u6307\u9488
\n void (*cb_func)(client_data *); \/\/\u4efb\u52a1\u56de\u8c03\u51fd\u6570
\n \/\/\u56de\u8c03\u51fd\u6570\u5904\u7406\u7684\u5ba2\u6237\u6570\u636e，\u7531\u5b9a\u65f6\u5668\u4f20\u9012\u7ed9\u56de\u8c03\u51fd\u6570
\n client_data *user_data;
\n util_timer *prev; \/\/\u6307\u5411\u524d\u4e00\u4e2a
\n util_timer *next; \/\/\u6307\u5411\u540e\u4e00\u4e2a
\n};<\/p>\n\/\/\u5b9a\u65f6\u5668\u94fe\u8868，\u662f\u4e00\u4e2a\u5347\u5e8f，\u53cc\u5411\u94fe\u8868，\u5e26\u6709\u5934\u7ed3\u70b9\u548c\u5c3e\u8282\u70b9
\nclass sort_timer_lst
\n{
\npublic:
\n sort_timer_lst():head(NULL),tail(NULL){}
\n \/\/\u94fe\u8868\u88ab\u9500\u6bc1\u65f6，\u5220\u9664\u91cc\u9762\u6240\u6709\u5b9a\u65f6\u5668
\n ~sort_timer_lst()
\n {
\n util_timer*tmp=head;
\n while(tmp)
\n {
\n head = tmp->next;
\n delete tmp;
\n tmp = head;
\n }
\n }<\/p>\n\/\/\u5c06\u76ee\u6807\u5b9a\u65f6\u5668timer\u6dfb\u52a0\u5230\u94fe\u8868\u4e2d
\n void add_timer(util_timer* timer)
\n {
\n if(!timer)
\n {\/\/timer\u4e3a\u7a7a\u8fd4\u56de
\n return;
\n }
\n if(!head)
\n {\/\/\u94fe\u8868\u4e3a\u7a7a
\n head = tail = timer;
\n return;
\n }<\/p>\n\/\/\u5982\u679ctimer\u7684\u8d85\u65f6\u65f6\u95f4\u5c0f\u4e8e\u94fe\u8868\u4e2d\u7684\u6240\u6709\u5b9a\u65f6\u5668\u7684\u8d85\u65f6\u65f6\u95f4，\u628atimer\u63d2\u5165\u5934\u90e8，\u5426\u5219
\n \/\/\u8c03\u7528\u91cd\u6784\u51fd\u6570add_timer(timer,lst_head)\u628a\u5b83\u63d2\u5165\u5408\u9002\u4f4d\u7f6e，\u4fdd\u8bc1\u94fe\u8868\u7684\u5347\u5e8f
\n if(timer->expire<head->expire)
\n {
\n timer->next = head;
\n head->prev= timer;
\n head =timer;
\n return;
\n }
\n add_timer(timer,head);
\n }<\/p>\n\/\/\u5f53\u67d0\u4e2a\u5b9a\u65f6\u4efb\u52a1\u53d1\u751f\u53d8\u5316\u65f6，\u8c03\u6574timer\u7684\u4f4d\u7f6e，\u8fd9\u4e2a\u51fd\u6570\u53ea\u8003\u8651timer\u8d85\u65f6\u65f6\u95f4\u5ef6\u957f\u60c5\u51b5，\u5373timer\u53ea\u5f80\u94fe\u8868\u5c3e\u90e8\u79fb\u52a8
\n void adjust_timer(util_timer* timer)
\n {
\n if(!timer) return;\/\/timer\u4e3a\u7a7a
\n util_timer*tmp = timer->next;
\n \/\/\u5982\u679ctimer\u5728\u5c3e\u90e8，\u6216timer\u7684\u8d85\u65f6\u503c\u4ecd\u5c0f\u4e8e\u4e0b\u4e00\u4e2atimer\u5219\u4e0d\u7528\u8c03\u6574
\n if(!tmp||(timer->expire<tmp->expire)) return;<\/p>\n\/\/\u5982\u679c\u76ee\u6807\u5b9a\u65f6\u5668\u662f\u94fe\u8868\u7684\u5934\u7ed3\u70b9，\u5219\u5c06\u5b9a\u65f6\u5668\u4ece\u94fe\u8868\u53d6\u51fa\u91cd\u65b0\u63d2\u5165\u94fe\u8868
\n if(timer==head)
\n {
\n head=head->next;
\n head->prev = NULL;
\n timer->next = NULL;
\n add_timer(timer,head);
\n }else
\n {\/\/\u5982\u679ctimer\u4e0d\u662f\u5934\u7ed3\u70b9，\u4ece\u94fe\u8868\u53d6\u51fa，\u63d2\u5165\u539f\u6765\u4f4d\u7f6e\u7684\u540e\u9762\u90e8\u5206\u94fe\u8868\u4e2d
\n timer->prev->next = timer->next;
\n timer->next->prev = timer->prev;
\n add_timer(timer,timer->next);
\n }
\n }<\/p>\n\/\/\u5c06timer\u4ece\u94fe\u8868\u4e2d\u5220\u9664
\n void del_timer(util_timer* timer)
\n {
\n if(!timer) return;\/\/\u4e3a\u7a7a
\n if((timer==head)&&(timer==tail))\/\/\u94fe\u8868\u4e2d\u53ea\u6709\u4e00\u4e2a\u5b9a\u65f6\u5668
\n {
\n delete timer;
\n head=NULL;
\n tail = NULL;
\n return;
\n }<\/p>\n\/\/\u5982\u679c\u94fe\u8868\u4e2d\u6709\u81f3\u5c11\u4e24\u4e2a\u5b9a\u65f6\u5668，\u4e14timer\u662f\u5934\u7ed3\u70b9，\u5219\u5c06\u5934\u7ed3\u70b9\u8bbe\u7f6e\u4e3atimer\u7684\u4e0b\u4e00\u4e2a
\n if(timer == head)
\n {
\n head = head->next;
\n head->prev = NULL;
\n delete timer;
\n return;
\n }
\n \/\/\u5982\u679c\u94fe\u8868\u6709\u81f3\u5c11\u4e24\u4e2a\u5b9a\u65f6\u5668，\u4e14timer\u662f\u5c3e\u8282\u70b9，\u5219\u5c06\u5c3e\u8282\u70b9\u8bbe\u4e3atimer\u524d\u4e00\u4e2a\u8282\u70b9
\n if(timer == tail)
\n {
\n tail = tail->prev;
\n tail->next = NULL;
\n delete timer;
\n return;
\n }
\n \/\/\u5982\u679ctimer\u4f4d\u4e8e\u4e2d\u95f4，\u628a\u5b83\u524d\u540e\u7684\u5b9a\u65f6\u5668\u8fde\u8d77\u6765
\n timer->prev->next = timer->next;
\n timer->next->prev = timer->prev;
\n delete timer;
\n }<\/p>\n\/\/SIGALRM\u4fe1\u53f7\u6bcf\u6b21\u88ab\u89e6\u53d1\u5c31\u5728\u5904\u7406\u4fe1\u53f7\u51fd\u6570\u91cc\u6267\u884c\u4e00\u6b21tick\u51fd\u6570，\u5904\u7406\u94fe\u8868\u4e2d\u5230\u671f\u4efb\u52a1
\n void tick()
\n {
\n if(!head) return;
\n printf("timer tick\\\\n");
\n time_t cur = time(NULL);\/\/\u83b7\u5f97\u7cfb\u7edf\u5f53\u524d\u65f6\u95f4
\n util_timer*tmp = head;
\n \/\/\u4ece\u5934\u8282\u70b9\u5f00\u59cb\u904d\u5386，\u76f4\u5230\u9047\u5230\u4e00\u4e2a\u672a\u5230\u671f\u7684\u5b9a\u65f6\u5668
\n while(tmp)
\n {
\n \/\/\u56e0\u4e3a\u6bcf\u4e2a\u5b9a\u65f6\u5668\u90fd\u662f\u7528\u7edd\u5bf9\u65f6\u95f4\u505a\u503c，\u6240\u4ee5\u53ef\u4ee5\u76f4\u63a5\u6bd4\u8f83timer\u7684\u8d85\u65f6\u503c\u548ccur
\n if(cur<tmp->expire) break;\/\/\u672a\u8d85\u65f6
\n \/\/\u8c03\u7528\u5b9a\u65f6\u5668\u7684\u56de\u8c03\u51fd\u6570，\u6267\u884c\u5b9a\u65f6\u4efb\u52a1
\n tmp->cb_func(tmp->user_data);\/\/\u4f20\u5165\u5ba2\u6237\u6570\u636e
\n head = tmp->next;
\n if(head)
\n {
\n head->prev = NULL;
\n }
\n delete tmp;
\n tmp = head;
\n }
\n }<\/p>\nprivate:
\n \/\/\u91cd\u6784\u8f85\u52a9\u51fd\u6570add_timer，\u5c06timer\u6dfb\u52a0\u5230\u5f53\u524d\u4f4d\u7f6e\u7684\u540e\u9762\u90e8\u5206\u94fe\u8868\u4e2d
\n void add_timer(util_timer* timer,util_timer*lst_head)
\n {
\n util_timer* prev=lst_head;
\n util_timer* tmp = prev->next;
\n \/\/\u904d\u5386lst_head\u8282\u70b9\u4e4b\u540e\u7684\u90e8\u5206\u94fe\u8868，\u76f4\u5230\u627e\u5230\u4e00\u4e2a\u8d85\u65f6\u65f6\u95f4\u5927\u4e8etimer\u7684\u8282\u70b9，\u5c06timer\u63d2\u5165\u8be5\u8282\u70b9\u524d
\n while(tmp)
\n {
\n if(timer->expire<tmp->expire)
\n {
\n prev->next =timer;
\n timer->next = tmp;
\n tmp->prev = timer;
\n timer->prev = prev;
\n break;
\n }
\n prev = tmp;
\n tmp = tmp->next;
\n }
\n \/\/\u5982\u679c\u904d\u5386\u5b8clst_head\u4e4b\u540e\u7684\u94fe\u8868，\u4ecd\u7136\u627e\u4e0d\u5230，\u5c31\u628atimer\u4f5c\u4e3a\u5c3e\u8282\u70b9
\n if(!tmp)
\n {
\n prev->next = timer;
\n timer->prev = prev;
\n timer->next = NULL;
\n tail = timer;
\n }
\n }
\nprivate:
\n util_timer*head;
\n util_timer*tail;
\n};<\/p>\n#endif<\/p>\n
main.cpp<\/h4>\n
#include "lst_timer.h"<\/p>\n
using namespace std;
\n#define FD_LIMIT 65535
\n#define MAX_EVENT_NUMBER 1024
\n#define TIMESLOT 5
\nstatic int pipefd[2];<\/p>\n\/\/\u5229\u7528\u5347\u5e8f\u94fe\u8868\u6765\u7ba1\u7406\u5b9a\u65f6\u5668
\nstatic sort_timer_lst timer_lst;
\nstatic int epollfd =0;<\/p>\nint setnonblocking(int fd)
\n{
\n int old_option = fcntl(fd,F_GETFL);
\n int new_option = old_option | O_NONBLOCK;
\n fcntl(fd,F_SETFL,new_option);
\n return old_option;
\n}<\/p>\nvoid addfd(int epollfd,int fd)
\n{
\n epoll_event event;
\n event.data.fd = fd;
\n event.events = EPOLLIN|EPOLLET;
\n epoll_ctl(epollfd,EPOLL_CTL_ADD,fd,&event);
\n setnonblocking(fd);
\n}<\/p>\nvoid sig_handler(int sig)
\n{
\n int save_errno = errno;
\n int msg =sig;
\n send(pipefd[1],(char*)&msg,1,0);
\n errno=save_errno;
\n}<\/p>\nvoid addsig(int sig)
\n{
\n struct sigaction sa;
\n memset(&sa,'\\\\0',sizeof(sa));
\n sa.sa_handler=sig_handler;
\n sa.sa_flags |= SA_RESTART;
\n sigfillset(&sa.sa_mask);
\n assert(sigaction(sig,&sa,NULL)!=-1);
\n}<\/p>\nvoid timer_handler()
\n{
\n \/\/\u5b9a\u65f6\u5904\u7406\u4efb\u52a1，\u5b9e\u9645\u4e0a\u5c31\u662f\u4f7f\u7528tick\u51fd\u6570
\n timer_lst.tick();
\n \/\/\u56e0\u4e3a\u4e00\u6b21alarm\u8c03\u7528\u53ea\u4f1a\u5f15\u8d77\u4e00\u6b21SIGALRM\u4fe1\u53f7，\u6240\u4ee5\u8981\u91cd\u65b0\u5b9a\u65f6
\n alarm(TIMESLOT);
\n}<\/p>\n\/\/\u5b9a\u65f6\u5668\u56de\u8c03\u51fd\u6570，\u5b83\u5220\u9664\u975e\u6d3b\u52a8\u94fe\u63a5socket\u4e0a\u7684\u6ce8\u518c\u4e8b\u4ef6，\u5e76\u5173\u95edfd
\nvoid cb_func(client_data*user_data)
\n{
\n epoll_ctl(epollfd,EPOLL_CTL_DEL,user_data->socket,0);
\n assert(user_data);
\n close(user_data->socket);
\n printf("close fd %d\\\\n",user_data->socket);
\n}<\/p>\nint main(int argc,char*argv[])
\n{
\n if(argc<=2)
\n {
\n printf("argc error\\\\n");
\n return -1;
\n }
\n const char*ip = argv[1];
\n int port =atoi(argv[2]);<\/p>\nint ret =0;
\n struct sockaddr_in address;
\n bzero(&address,sizeof(address));
\n address.sin_family = AF_INET;
\n inet_pton(AF_INET,ip,&address.sin_addr);
\n address.sin_port=htons(port);<\/p>\nint listenfd = socket(PF_INET,SOCK_STREAM,0);
\n assert(listenfd>=0);<\/p>\nret = bind(listenfd,(struct sockaddr*)&address,sizeof(address));
\n assert(ret != -1);<\/p>\nret =listen(listenfd,5);
\n assert(ret != -1);<\/p>\nepoll_event events[MAX_EVENT_NUMBER];
\n epollfd = epoll_create(5);
\n assert(epollfd!=-1);
\n addfd(epollfd,listenfd);<\/p>\n\/\/\u521b\u5efa\u5168\u53cc\u5de5\u65e0\u540d\u7ba1\u9053
\n ret = socketpair(PF_UNIX,SOCK_STREAM,0,pipefd);
\n assert(ret != -1);
\n \/\/\u907f\u514d\u4fe1\u53f7\u5904\u7406\u51fd\u6570\u963b\u585e
\n setnonblocking(pipefd[1]);
\n addfd(epollfd,pipefd[0]);<\/p>\n\/\/\u8bbe\u7f6e\u4fe1\u53f7\u5904\u7406\u51fd\u6570
\n \/\/\u95f9\u949f\u5b9a\u65f6\u4fe1\u53f7
\n addsig(SIGALRM);
\n \/\/\u7a0b\u5e8f\u7ec8\u6b62\u4fe1\u53f7
\n addsig(SIGTERM);
\n bool stop_server = false;<\/p>\n\/\/\u7528\u6237\u4fe1\u606f\u6570\u7ec4
\n client_data* users = new client_data[FD_LIMIT];
\n bool timeout = false;
\n alarm(TIMESLOT);\/\/\u5b9a\u65f6<\/p>\nwhile(!stop_server)
\n {
\n int number = epoll_wait(epollfd,events,MAX_EVENT_NUMBER,-1);
\n if((number<0)&&(errno!=EINTR))
\n {
\n printf("epoll failture\\\\n");
\n break;
\n }<\/p>\nfor(int i=0;i<number;i++)
\n {
\n int sockfd = events[i].data.fd;
\n \/\/\u5904\u7406\u65b0\u5230\u7684\u5ba2\u6237\u94fe\u63a5
\n if(sockfd == listenfd)
\n {
\n struct sockaddr_in client_address;
\n socklen_t client_addrlength = sizeof(client_address);
\n int connfd = accept(listenfd,(struct sockaddr*)&client_address,&client_addrlength);<\/p>\naddfd(epollfd,connfd);
\n users[connfd].address = client_address;
\n users[connfd].socket=connfd;<\/p>\n\/\/\u521b\u5efa\u5b9a\u65f6\u5668，\u8bbe\u7f6e\u56de\u8c03\u51fd\u6570\u548c\u8d85\u65f6\u65f6\u95f4，\u7ed1\u5b9a\u5b9a\u65f6\u5668\u4e0e\u7528\u6237\u6570\u636e，\u6dfb\u52a0\u5230timer\u94fe\u8868\u4e2d
\n util_timer* timer = new util_timer;
\n timer->user_data = &users[connfd];
\n timer->cb_func = cb_func;\/\/\u8bbe\u7f6e\u56de\u8c03\u51fd\u6570
\n time_t cur = time(NULL);
\n \/\/\u8bbe\u7f6e\u5b9a\u65f6\u5668\u7684\u3010\u8d85\u65f6\u65f6\u95f4\u3011= \u5f53\u524d\u65f6\u95f4 + 15\u79d2
\n timer->expire = cur+3*TIMESLOT;
\n \/\/\u8ba9\u5ba2\u6237\u7aef\u6570\u636e\u8bb0\u5f55\u81ea\u5df1\u7684\u5b9a\u65f6\u5668
\n users[connfd].timer = timer;
\n timer_lst.add_timer(timer);
\n }else if((sockfd == pipefd[0])&&(events[i].events&EPOLLIN))
\n {
\n int sig;
\n char signals[1024];
\n ret = recv(pipefd[0],signals,sizeof(signals),0);
\n if(ret == -1)
\n {
\n continue;\/\/\u51fa\u9519
\n }
\n else if(ret == 0)
\n {
\n continue;
\n }
\n else{
\n for(int i=0;i<ret;i++)
\n {
\n switch(signals[i])
\n {
\n case SIGALRM:
\n {\/\/\u7528timeout\u6807\u8bb0\u6709\u5b9a\u65f6\u4efb\u52a1，\u56e0\u4e3a\u5b9a\u65f6\u4efb\u52a1\u4f18\u5148\u7ea7\u4e0d\u9ad8，\u4f18\u5148\u5904\u7406\u522b\u7684
\n timeout = true;
\n break;
\n }
\n case SIGTERM:
\n {
\n stop_server = true;
\n }
\n }
\n }
\n }<\/p>\n} else if(events[i].events&EPOLLIN)
\n {
\n memset(users[sockfd].buf,'\\\\0',BUFFER_SIZE);
\n ret = recv(sockfd,users[sockfd].buf,BUFFER_SIZE-1,0);
\n printf("get %d bytes of client data %s from %d\\\\n",ret,users[sockfd].buf,sockfd);
\n util_timer* timer = users[sockfd].timer;
\n if(ret < 0)
\n {
\n \/\/\u53d1\u751f\u9519\u8bef，\u5173\u95ed\u8fde\u63a5\u5e76\u79fb\u9664\u5b9a\u65f6\u5668
\n if(errno!=EAGAIN)
\n {
\n cb_func(&users[sockfd]);
\n if(timer){
\n timer_lst.del_timer(timer);
\n }
\n }
\n }else if(ret == 0)
\n {\/\/\u5bf9\u7aef\u5173\u95ed\u8fde\u63a5，\u8fd9\u8fb9\u4e5f\u5173\u95ed\u8fde\u63a5，\u5e76\u79fb\u9664\u5bf9\u5e94\u5b9a\u65f6\u5668
\n cb_func(&users[sockfd]);
\n if(timer)
\n {
\n timer_lst.del_timer(timer);
\n }
\n }
\n else{
\n \/\/\u5982\u679c\u67d0\u4e2a\u5ba2\u6237\u8fde\u63a5\u6709\u6570\u636e\u53ef\u8bfb，\u4e5f\u9700\u8981\u8c03\u6574\u5bf9\u5e94\u7684timer，\u5ef6\u8fdf\u5173\u95ed\u7684\u65f6\u95f4
\n if(timer)
\n {
\n time_t cur = time(NULL);
\n timer->expire = cur + 3*TIMESLOT;
\n printf("adjust timer once\\\\n");
\n timer_lst.adjust_timer(timer);
\n }
\n }<\/p>\n}
\n else
\n {
\n \/\/other
\n }
\n }
\n \/\/\u6700\u540e\u5904\u7406\u5b9a\u65f6\u4e8b\u4ef6，\u56e0\u4e3aIO\u4e8b\u4ef6\u4f18\u5148\u7ea7\u66f4\u9ad8
\n if(timeout){
\n timer_handler();
\n timeout = false;
\n }
\n }
\n close(listenfd);
\n close(pipefd[1]);
\n close(pipefd[0]);
\n delete [] users;
\n return 0;
\n}<\/p>\n(\u539f\u7b14\u8bb0：GameServer-Learning\/00-Notes\/Network\/linux-high-performance at main \u00b7 maomianbaobumoyu\/GameServer-Learning)<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"
\u672c\u6587\u4ece\u96f6\u5f00\u59cb\u8bb2\u89e3 Linux \u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u4e2d\u6700\u57fa\u7840\u7684\u5347\u5e8f\u94fe\u8868\u5b9a\u65f6\u5668\u5b9e\u73b0，\u4ece\u6570\u636e\u7ed3\u6784\u8bbe\u8ba1\u5230\u5b8c\u6574\u53ef\u8fd0\u884c\u4ee3\u7801，\u4e00\u6b65\u6b65\u62c6\u89e3\u5b9a\u65f6\u5668\u7684\u6838\u5fc3\u539f\u7406\u3002\u9002\u5408\u6b63\u5728\u5b66\u4e60 Linux \u7f51\u7edc\u7f16\u7a0b\u3001\u60f3\u8981\u638c\u63e1\u670d\u52a1\u5668\u8d85\u65f6\u8fde\u63a5\u7ba1\u7406\u7684\u540c\u5b66\u3002
\n\u6700\u7ec8\u5b9e\u73b0\u6548\u679c：\u670d\u52a1\u5668\u81ea\u52a8\u6e05\u7406 15 \u79d2\u65e0\u6570\u636e\u4ea4\u4e92\u7684\u95f2\u7f6e\u5ba2\u6237\u7aef\u8fde\u63a5，\u4fdd\u8bc1\u670d\u52a1\u5668\u8d44\u6e90\u4e0d\u88ab\u8017\u5c3d\u3002
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