{"id":12724,"date":"2025-04-18T19:47:50","date_gmt":"2025-04-18T11:47:50","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/12724.html"},"modified":"2025-04-18T19:47:50","modified_gmt":"2025-04-18T11:47:50","slug":"%e7%bd%91%e7%bb%9c%e7%bc%96%e7%a8%8b%e5%85%ad%ef%bc%9ac%e5%ae%9e%e7%8e%b0%e5%9f%ba%e4%ba%8ereactor%e7%9a%84%e7%99%be%e4%b8%87%e7%ba%a7%e5%b9%b6%e5%8f%91%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/12724.html","title":{"rendered":"\u7f51\u7edc\u7f16\u7a0b(\u516d)\uff1aC++\u5b9e\u73b0\u57fa\u4e8ereactor\u7684\u767e\u4e07\u7ea7\u5e76\u53d1\u670d\u52a1\u5668"},"content":{"rendered":"

\u76ee\u5f55<\/p>\n

\u524d\u8a00<\/p>\n

\u4e00\u3001\u57fa\u4e8e Reactor \u6a21\u5f0f\u7684\u767e\u4e07\u7ea7\u5e76\u53d1\u670d\u52a1\u5668\u662f\u4ec0\u4e48？<\/p>\n

\u4e8c\u3001\u6e90\u7801\u5c55\u793a<\/p>\n

\n

\u4e09\u3001\u4ee3\u7801\u5206\u6790<\/p>\n

1.\u5b9a\u4e49\u5e38\u91cf\u4e0e\u7ed3\u6784\u4f53<\/p>\n

\n

2.set_event \u51fd\u6570<\/p>\n

3.event_register \u51fd\u6570<\/p>\n

4.\u8fde\u63a5\u63a5\u6536\u4e0e\u53d1\u9001\u56de\u8c03\u51fd\u6570<\/p>\n

5.init_server \u51fd\u6570<\/p>\n

6.main \u51fd\u6570<\/p>\n

7.\u603b\u7ed3：<\/p>\n

\u56db\u3001\u5e38\u89c1\u95ee\u9898<\/p>\n

1.\u9ed8\u8ba4\u7684open files\u6570\u91cf\u9650\u5236\u4e3a1024\u200b\u7f16\u8f91<\/p>\n

\u89e3\u51b3\u65b9\u6848：<\/p>\n

2.\u4e0d\u80fd\u5206\u914d\u5730\u5740<\/p>\n

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3.\u7cfb\u7edf\u7248\u672c\u5bfc\u81f4\u7684\u95ee\u9898<\/p>\n

\u89e3\u51b3\u65b9\u6848：<\/p>\n

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\u603b\u7ed3<\/p>\n

\n

\u524d\u8a00<\/h2>\n

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0voice \u00b7 GitHub<\/p>\n

\n

\u4e00\u3001\u57fa\u4e8e Reactor \u6a21\u5f0f\u7684\u767e\u4e07\u7ea7\u5e76\u53d1\u670d\u52a1\u5668\u662f\u4ec0\u4e48？<\/h2>\n

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\u4e8c\u3001\u6e90\u7801\u5c55\u793a<\/h2>\n

#include <errno.h>
\n#include <stdio.h>
\n#include <sys\/socket.h>
\n#include <netinet\/in.h>
\n#include <string.h>
\n#include <pthread.h>
\n#include <unistd.h>
\n#include <poll.h>
\n#include <sys\/epoll.h>
\n#include <errno.h>
\n#include <sys\/time.h><\/p>\n

#define BUFFER_LENGTH1024
\n#define CONNECTION_SIZE 1048576<\/p>\n

#define MAX_PORTS20<\/p>\n

#define TIME_SUB_MS(tv1, tv2) ((tv1.tv_sec – tv2.tv_sec) * 1000 + (tv1.tv_usec – tv2.tv_usec) \/ 1000)<\/p>\n

typedef int (*RCALLBACK)(int fd);<\/p>\n

int accept_cb(int fd);
\nint recv_cb(int fd);
\nint send_cb(int fd);<\/p>\n

int epfd = 0;
\nstruct timeval begin;<\/p>\n

struct conn {
\nint fd;<\/p>\n

char rbuffer[BUFFER_LENGTH];
\nint rlength;<\/p>\n

char wbuffer[BUFFER_LENGTH];
\nint wlength;<\/p>\n

RCALLBACK send_callback;<\/p>\n

union {
\nRCALLBACK recv_callback;
\nRCALLBACK accept_callback;
\n} r_action;<\/p>\n

};<\/p>\n

\/\/fd\u505a\u4e0b\u6807
\nstruct conn conn_list[CONNECTION_SIZE] = {0};<\/p>\n

int set_event(int fd, int event, int flag) {<\/p>\n

if (flag) { \/\/ non-zero add<\/p>\n

struct epoll_event ev;
\nev.events = event;
\nev.data.fd = fd;
\nepoll_ctl(epfd, EPOLL_CTL_ADD, fd, &ev);<\/p>\n

} else { \/\/ zero mod<\/p>\n

struct epoll_event ev;
\nev.events = event;
\nev.data.fd = fd;
\nepoll_ctl(epfd, EPOLL_CTL_MOD, fd, &ev);<\/p>\n

}<\/p>\n

}<\/p>\n

int event_register(int fd, int event) {<\/p>\n

if (fd < 0) return -1;<\/p>\n

conn_list[fd].fd = fd;
\nconn_list[fd].r_action.recv_callback = recv_cb;
\nconn_list[fd].send_callback = send_cb;<\/p>\n

memset(conn_list[fd].rbuffer, 0, BUFFER_LENGTH);
\nconn_list[fd].rlength = 0;<\/p>\n

memset(conn_list[fd].wbuffer, 0, BUFFER_LENGTH);
\nconn_list[fd].wlength = 0;<\/p>\n

set_event(fd, event, 1);
\n}<\/p>\n

\/\/ listenfd(sockfd) –> EPOLLIN –> accept_cb
\nint accept_cb(int fd) {<\/p>\n

struct sockaddr_in clientaddr;
\nsocklen_t len = sizeof(clientaddr);<\/p>\n

int clientfd = accept(fd, (struct sockaddr*)&clientaddr, &len);
\n\/\/printf("accept finshed: %d\\\\n", clientfd);
\nif (clientfd < 0) {
\nprintf("accept errno: %d –> %s\\\\n", errno, strerror(errno));
\nreturn -1;
\n}<\/p>\n

event_register(clientfd, EPOLLIN); \/\/ | EPOLLET<\/p>\n

if ((clientfd % 1000) == 0) {<\/p>\n

struct timeval current;
\ngettimeofday(&current, NULL);<\/p>\n

int time_used = TIME_SUB_MS(current, begin);
\nmemcpy(&begin, &current, sizeof(struct timeval));<\/p>\n

printf("accept finshed: %d, time_used: %d\\\\n", clientfd, time_used);<\/p>\n

}<\/p>\n

return 0;
\n}<\/p>\n

int recv_cb(int fd) {<\/p>\n

memset(conn_list[fd].rbuffer, 0, BUFFER_LENGTH );
\nint count = recv(fd, conn_list[fd].rbuffer, BUFFER_LENGTH, 0);
\nif (count == 0) { \/\/ disconnect
\nprintf("client disconnect: %d\\\\n", fd);
\nclose(fd);<\/p>\n

epoll_ctl(epfd, EPOLL_CTL_DEL, fd, NULL); \/\/ unfinished<\/p>\n

return 0;
\n} else if (count < 0) { \/\/ <\/p>\n

printf("count: %d, errno: %d, %s\\\\n", count, errno, strerror(errno));
\nclose(fd);
\nepoll_ctl(epfd, EPOLL_CTL_DEL, fd, NULL);<\/p>\n

return 0;
\n}<\/p>\n

conn_list[fd].rlength = count;
\n\/\/printf("RECV: %s\\\\n", conn_list[fd].rbuffer);<\/p>\n

\/\/ echo
\nconn_list[fd].wlength = conn_list[fd].rlength;
\nmemcpy(conn_list[fd].wbuffer, conn_list[fd].rbuffer, conn_list[fd].wlength);<\/p>\n

set_event(fd, EPOLLOUT, 0);<\/p>\n

return count;
\n}<\/p>\n

int send_cb(int fd) {<\/p>\n

int count = 0;<\/p>\n

if (conn_list[fd].wlength != 0) {
\ncount = send(fd, conn_list[fd].wbuffer, conn_list[fd].wlength, 0);
\n}<\/p>\n

set_event(fd, EPOLLIN, 0);<\/p>\n

return count;
\n}<\/p>\n

int init_server(unsigned short port) {<\/p>\n

int sockfd = socket(AF_INET, SOCK_STREAM, 0);<\/p>\n

struct sockaddr_in servaddr;
\nservaddr.sin_family = AF_INET;
\nservaddr.sin_addr.s_addr = htonl(INADDR_ANY); \/\/ 0.0.0.0
\nservaddr.sin_port = htons(port); \/\/ 0-1023, <\/p>\n

if (-1 == bind(sockfd, (struct sockaddr*)&servaddr, sizeof(struct sockaddr))
\n) {
\nprintf("bind failed: %s\\\\n", strerror(errno));
\n}<\/p>\n

listen(sockfd, 10);
\n\/\/printf("listen finshed: %d\\\\n", sockfd); \/\/ 3 <\/p>\n

return sockfd;<\/p>\n

}<\/p>\n

int main() {<\/p>\n

unsigned short port = 2000;<\/p>\n

epfd = epoll_create(1);<\/p>\n

int i = 0;<\/p>\n

for (i = 0;i < MAX_PORTS;i ++) {<\/p>\n

int sockfd = init_server(port + i);<\/p>\n

conn_list[sockfd].fd = sockfd;
\nconn_list[sockfd].r_action.recv_callback = accept_cb;
\nset_event(sockfd, EPOLLIN, 1);<\/p>\n

}<\/p>\n

gettimeofday(&begin, NULL);<\/p>\n

while (1) { \/\/ mainloop<\/p>\n

struct epoll_event events[1024] = {0};
\nint nready = epoll_wait(epfd, events, 1024, -1);<\/p>\n

int i = 0;
\nfor (i = 0;i < nready;i ++) {<\/p>\n

int connfd = events[i].data.fd;<\/p>\n

if (events[i].events & EPOLLIN) {
\nconn_list[connfd].r_action.recv_callback(connfd);
\n} <\/p>\n

if (events[i].events & EPOLLOUT) {
\nconn_list[connfd].send_callback(connfd);
\n}<\/p>\n

}<\/p>\n

}<\/p>\n

}<\/p>\n

<\/h4>\n

\u4e09\u3001\u4ee3\u7801\u5206\u6790<\/h2>\n

\u8fd9\u6bb5\u4ee3\u7801\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u57fa\u4e8e epoll \u7684 I\/O \u591a\u8def\u590d\u7528\u7f51\u7edc\u670d\u52a1\u5668\u5b9e\u73b0\u3002\u5b83\u7684\u6838\u5fc3\u529f\u80fd\u662f\u76d1\u542c\u591a\u4e2a\u7aef\u53e3，\u63a5\u53d7\u6765\u81ea\u5ba2\u6237\u7aef\u7684\u8fde\u63a5，\u5e76\u4e14\u901a\u8fc7\u56de\u8c03\u673a\u5236\u5904\u7406\u63a5\u6536\u5230\u7684\u6570\u636e\u548c\u53d1\u9001\u7684\u6570\u636e\u3002\u5b83\u5229\u7528\u4e86 epoll \u7684\u9ad8\u6548\u4e8b\u4ef6\u9a71\u52a8\u6a21\u578b\u6765\u5904\u7406\u591a\u4e2a\u5e76\u53d1\u8fde\u63a5\u3002<\/p>\n

1.\u5b9a\u4e49\u5e38\u91cf\u4e0e\u7ed3\u6784\u4f53<\/h3>\n

#define BUFFER_LENGTH 1024
\n#define CONNECTION_SIZE 1048576
\n#define MAX_PORTS 20<\/p>\n

#define TIME_SUB_MS(tv1, tv2) ((tv1.tv_sec – tv2.tv_sec) * 1000 + (tv1.tv_usec – tv2.tv_usec) \/ 1000)<\/p>\n

typedef int (*RCALLBACK)(int fd);<\/p>\n

<\/h3>\n