\u968f\u7740\u4e92\u8054\u7f51\u5e94\u7528\u7684\u590d\u6742\u6027\u4e0d\u65ad\u589e\u52a0，\u7f51\u7edc\u670d\u52a1\u7684\u5e76\u53d1\u5904\u7406\u80fd\u529b\u53d8\u5f97\u8d8a\u6765\u8d8a\u91cd\u8981\u3002\u5bf9\u4e8e\u4e00\u4e2a\u9ad8\u5e76\u53d1\u3001\u9ad8\u541e\u5410\u91cf\u7684\u670d\u52a1\u5668，\u4f20\u7edf\u7684\u591a\u7ebf\u7a0b\u548c\u591a\u8fdb\u7a0b\u6a21\u578b\u5f80\u5f80\u4f1a\u53d7\u5230\u8d44\u6e90\u6d88\u8017\u3001\u4e0a\u4e0b\u6587\u5207\u6362\u7b49\u95ee\u9898\u7684\u9650\u5236\u3002\u56e0\u6b64，\u91c7\u7528\u9ad8\u6548\u7684\u4e8b\u4ef6\u9a71\u52a8\u6a21\u578b\u6210\u4e3a\u4e86\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u7684\u8bbe\u8ba1\u8d8b\u52bf\u4e4b\u4e00\u3002<\/p>\n
Reactor \u6a21\u5f0f\u4f5c\u4e3a\u4e00\u79cd\u4e8b\u4ef6\u9a71\u52a8\u7684\u8bbe\u8ba1\u6a21\u5f0f，\u5df2\u7ecf\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u7684\u5f00\u53d1\u4e2d\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528 C++ \u5b9e\u73b0\u4e00\u4e2a\u57fa\u4e8e Reactor \u6a21\u5f0f\u7684\u767e\u4e07\u7ea7\u5e76\u53d1\u670d\u52a1\u5668\u3002<\/p>\n
Reactor \u6a21\u5f0f\u662f\u4e00\u79cd\u4e8b\u4ef6\u9a71\u52a8\u6a21\u5f0f，\u65e8\u5728\u5904\u7406\u5927\u91cf\u5e76\u53d1\u7684 I\/O \u4e8b\u4ef6\u3002\u5728\u8be5\u6a21\u5f0f\u4e0b，\u4e8b\u4ef6\u53d1\u751f\u65f6\u901a\u8fc7\u201c\u4e8b\u4ef6\u5206\u53d1\u5668\u201d\u5c06\u4e8b\u4ef6\u5206\u53d1\u5230\u76f8\u5e94\u7684\u201c\u4e8b\u4ef6\u5904\u7406\u5668\u201d\u8fdb\u884c\u5904\u7406\u3002Reactor \u6a21\u5f0f\u5177\u6709\u4ee5\u4e0b\u7279\u70b9：<\/p>\n
Reactor \u6a21\u5f0f\u7684\u57fa\u672c\u7ed3\u6784\u7531\u4ee5\u4e0b\u51e0\u4e2a\u7ec4\u6210\u90e8\u5206\u6784\u6210：<\/p>\n
\u5728\u8bbe\u8ba1\u767e\u4e07\u7ea7\u5e76\u53d1\u7684\u670d\u52a1\u5668\u65f6，\u4e3b\u8981\u9762\u4e34\u4ee5\u4e0b\u6311\u6218：<\/p>\n
\u4f20\u7edf\u7684\u963b\u585e\u5f0f I\/O \u6a21\u578b\u4f1a\u5bfc\u81f4\u7ebf\u7a0b\u5904\u4e8e\u7b49\u5f85\u72b6\u6001，\u4ece\u800c\u6d6a\u8d39\u5927\u91cf\u7684\u7cfb\u7edf\u8d44\u6e90\u3002\u800c\u4f7f\u7528\u591a\u7ebf\u7a0b\u6a21\u578b\u65f6，\u7ebf\u7a0b\u7684\u9891\u7e41\u5207\u6362\u3001\u4e0a\u4e0b\u6587\u5207\u6362\u548c\u7ebf\u7a0b\u6c60\u7684\u7ba1\u7406\u4e5f\u4f1a\u5f15\u53d1\u663e\u8457\u7684\u6027\u80fd\u5f00\u9500\u3002<\/p>\n
\u5982\u4f55\u53ca\u65f6\u3001\u51c6\u786e\u5730\u83b7\u53d6\u7f51\u7edc\u4e8b\u4ef6\u7684\u53d1\u751f，\u5e76\u5c06\u4e8b\u4ef6\u5206\u53d1\u7ed9\u76f8\u5e94\u7684\u5904\u7406\u5668，\u662f\u9ad8\u6548\u5e76\u53d1\u670d\u52a1\u5668\u7684\u6838\u5fc3\u95ee\u9898\u3002\u901a\u8fc7 I\/O \u591a\u8def\u590d\u7528，Reactor \u6a21\u5f0f\u53ef\u4ee5\u540c\u65f6\u76d1\u542c\u591a\u4e2a\u6587\u4ef6\u63cf\u8ff0\u7b26，\u5e76\u5728\u76f8\u5e94\u4e8b\u4ef6\u53d1\u751f\u65f6\u8fdb\u884c\u5904\u7406\u3002<\/p>\n
\u767e\u4e07\u7ea7\u5e76\u53d1\u7684\u670d\u52a1\u5668\u9700\u8981\u4fdd\u8bc1\u8d44\u6e90\u7684\u9ad8\u6548\u5229\u7528\u3002\u901a\u8fc7\u907f\u514d\u4e3a\u6bcf\u4e2a\u8fde\u63a5\u521b\u5efa\u72ec\u7acb\u7684\u7ebf\u7a0b，Reactor \u6a21\u5f0f\u6709\u6548\u51cf\u5c11\u4e86\u7cfb\u7edf\u8d44\u6e90\u6d88\u8017\u3002<\/p>\n
\u4e3a\u4e86\u5b9e\u73b0\u4e00\u4e2a\u57fa\u4e8e Reactor \u6a21\u5f0f\u7684\u9ad8\u5e76\u53d1\u670d\u52a1\u5668，\u6211\u4eec\u9700\u8981\u4f7f\u7528\u9ad8\u6548\u7684 I\/O \u591a\u8def\u590d\u7528\u673a\u5236，\u4f8b\u5982 epoll（\u5728 Linux \u73af\u5883\u4e0b）\u3002\u4e0b\u9762\u6211\u4eec\u5c06\u4f7f\u7528 C++ \u5b9e\u73b0\u4e00\u4e2a\u7b80\u5355\u7684 Reactor \u6a21\u5f0f\u670d\u52a1\u5668，\u8be5\u670d\u52a1\u5668\u80fd\u591f\u5904\u7406\u767e\u4e07\u7ea7\u5e76\u53d1\u8bf7\u6c42\u3002<\/p>\n
\u4e8b\u4ef6\u5904\u7406\u5668\u8d1f\u8d23\u5904\u7406\u6bcf\u4e2a\u5ba2\u6237\u7aef\u7684 I\/O \u64cd\u4f5c\u3002\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d，\u6211\u4eec\u7684\u4e8b\u4ef6\u5904\u7406\u5668\u4f1a\u5728\u63a5\u6536\u5230\u6570\u636e\u65f6\u8fdb\u884c\u5904\u7406，\u5e76\u8fd4\u56de\u4e00\u4e2a\u54cd\u5e94\u3002<\/p>\n
#include <iostream>
\n#include <unistd.h>
\n#include <cstring><\/p>\n
class EventHandler {
\npublic:
\n virtual void handle_read(int fd) = 0;
\n virtual void handle_write(int fd) = 0;
\n virtual void handle_error(int fd) = 0;
\n};<\/p>\n
class EchoHandler : public EventHandler {
\npublic:
\n void handle_read(int fd) override {
\n char buffer[1024];
\n int bytesRead = read(fd, buffer, sizeof(buffer));
\n if (bytesRead > 0) {
\n std::cout << "Received data: " << std::string(buffer, bytesRead) << std::endl;
\n write(fd, buffer, bytesRead); \/\/ Echo back the data
\n } else {
\n handle_error(fd);
\n }
\n }<\/p>\n
void handle_write(int fd) override {
\n \/\/ Handle write events if necessary (usually handled after reading)
\n }<\/p>\n
void handle_error(int fd) override {
\n close(fd);
\n std::cout << "Error or connection closed for fd: " << fd << std::endl;
\n }
\n};<\/p>\n
Reactor \u662f\u4e8b\u4ef6\u5206\u53d1\u7684\u6838\u5fc3，\u8d1f\u8d23\u901a\u8fc7 epoll \u76d1\u542c\u591a\u4e2a\u5ba2\u6237\u7aef\u7684 I\/O \u4e8b\u4ef6，\u5e76\u5c06\u4e8b\u4ef6\u5206\u53d1\u7ed9\u76f8\u5e94\u7684\u4e8b\u4ef6\u5904\u7406\u5668\u3002<\/p>\n
#include <sys\/epoll.h>
\n#include <fcntl.h>
\n#include <unistd.h>
\n#include <iostream>
\n#include <vector><\/p>\n
class Reactor {
\npublic:
\n Reactor() {
\n epoll_fd = epoll_create1(0);
\n if (epoll_fd == -1) {
\n std::cerr << "Failed to create epoll instance" << std::endl;
\n exit(1);
\n }
\n }<\/p>\n
~Reactor() {
\n close(epoll_fd);
\n }<\/p>\n
void register_handler(int fd, EventHandler* handler) {
\n struct epoll_event ev;
\n ev.events = EPOLLIN | EPOLLOUT | EPOLLET;
\n ev.data.fd = fd;
\n epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd, &ev);
\n handlers[fd] = handler;
\n }<\/p>\n
void run() {
\n const int MAX_EVENTS = 100;
\n struct epoll_event events[MAX_EVENTS];<\/p>\n
while (true) {
\n int eventCount = epoll_wait(epoll_fd, events, MAX_EVENTS, -1);
\n for (int i = 0; i < eventCount; ++i) {
\n int fd = events[i].data.fd;
\n if (events[i].events & EPOLLIN) {
\n handlers[fd]->handle_read(fd);
\n }
\n if (events[i].events & EPOLLOUT) {
\n handlers[fd]->handle_write(fd);
\n }
\n if (events[i].events & (EPOLLERR | EPOLLHUP)) {
\n handlers[fd]->handle_error(fd);
\n }
\n }
\n }
\n }<\/p>\n
private:
\n int epoll_fd;
\n std::unordered_map<int, EventHandler*> handlers;
\n};<\/p>\n
\u6700\u540e，\u6211\u4eec\u9700\u8981\u5b9e\u73b0\u670d\u52a1\u5668\u7684\u4e3b\u7a0b\u5e8f，\u8d1f\u8d23\u76d1\u542c\u5ba2\u6237\u7aef\u8fde\u63a5\u3001\u63a5\u53d7\u8fde\u63a5\u8bf7\u6c42\u3001\u521b\u5efa\u65b0\u7684\u4e8b\u4ef6\u5904\u7406\u5668，\u5e76\u5c06\u8fd9\u4e9b\u8fde\u63a5\u6ce8\u518c\u5230 Reactor \u4e2d\u3002<\/p>\n
#include <sys\/socket.h>
\n#include <netinet\/in.h>
\n#include <arpa\/inet.h>
\n#include <iostream>
\n#include <fcntl.h><\/p>\n
#define SERVER_PORT 8080
\n#define SERVER_ADDR "127.0.0.1"<\/p>\n
int create_server_socket() {
\n int server_fd = socket(AF_INET, SOCK_STREAM | SOCK_NONBLOCK, 0);
\n if (server_fd == -1) {
\n std::cerr << "Failed to create socket" << std::endl;
\n exit(1);
\n }<\/p>\n
sockaddr_in server_addr;
\n server_addr.sin_family = AF_INET;
\n server_addr.sin_port = htons(SERVER_PORT);
\n server_addr.sin_addr.s_addr = inet_addr(SERVER_ADDR);<\/p>\n
if (bind(server_fd, (struct sockaddr*)&server_addr, sizeof(server_addr)) == -1) {
\n std::cerr << "Failed to bind socket" << std::endl;
\n exit(1);
\n }<\/p>\n
if (listen(server_fd, 100) == -1) {
\n std::cerr << "Failed to listen on socket" << std::endl;
\n exit(1);
\n }<\/p>\n
return server_fd;
\n}<\/p>\n
int main() {
\n int server_fd = create_server_socket();
\n Reactor reactor;
\n EchoHandler handler;<\/p>\n
while (true) {
\n sockaddr_in client_addr;
\n socklen_t client_len = sizeof(client_addr);
\n int client_fd = accept(server_fd, (struct sockaddr*)&client_addr, &client_len);<\/p>\n
if (client_fd != -1) {
\n std::cout << "New connection from client" << std::endl;
\n reactor.register_handler(client_fd, &handler);
\n }
\n }<\/p>\n
reactor.run();
\n return 0;
\n}<\/p>\n
\u5c06\u4e0a\u8ff0\u4ee3\u7801\u4fdd\u5b58\u4e3a C++ \u6e90\u6587\u4ef6（\u5982 server.cpp），\u5e76\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u7f16\u8bd1：<\/p>\n
g++ server.cpp -o server -std=c++11 -pthread<\/p>\n
\u7136\u540e\u8fd0\u884c\u670d\u52a1\u5668：<\/p>\n
.\/server<\/p>\n
\u901a\u8fc7\u4f7f\u7528 Reactor \u6a21\u5f0f，\u6211\u4eec\u80fd\u591f\u6784\u5efa\u4e00\u4e2a\u9ad8\u6548\u7684\u3001\u80fd\u591f\u652f\u6301\u767e\u4e07\u7ea7\u5e76\u53d1\u8fde\u63a5\u7684\u670d\u52a1\u5668\u3002\u901a\u8fc7 epoll \u7b49 I\/O \u591a\u8def\u590d\u7528\u6280\u672f，\u6211\u4eec\u907f\u514d\u4e86\u4f20\u7edf\u591a\u7ebf\u7a0b\u6a21\u578b\u4e2d\u7ebf\u7a0b\u521b\u5efa\u548c\u4e0a\u4e0b\u6587\u5207\u6362\u7684\u5f00\u9500，\u5b9e\u73b0\u4e86\u66f4\u9ad8\u6548\u7684\u5e76\u53d1\u5904\u7406\u80fd\u529b\u3002Reactor \u6a21\u5f0f\u4e0d\u4ec5\u80fd\u591f\u63d0\u9ad8\u7cfb\u7edf\u7684\u541e\u5410\u91cf，\u8fd8\u80fd\u6709\u6548\u5229\u7528\u7cfb\u7edf\u8d44\u6e90，\u662f\u6784\u5efa\u9ad8\u6027\u80fd\u670d\u52a1\u5668\u7684\u7406\u60f3\u9009\u62e9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb794\u6b21\uff0c\u70b9\u8d5e13\u6b21\uff0c\u6536\u85cf5\u6b21\u3002Reactor \u6a21\u5f0f\u662f\u4e00\u79cd\u4e8b\u4ef6\u9a71\u52a8\u6a21\u5f0f\uff0c\u65e8\u5728\u5904\u7406\u5927\u91cf\u5e76\u53d1\u7684 I\/O \u4e8b\u4ef6\u3002\u5728\u8be5\u6a21\u5f0f\u4e0b\uff0c\u4e8b\u4ef6\u53d1\u751f\u65f6\u901a\u8fc7\u201c\u4e8b\u4ef6\u5206\u53d1\u5668\u201d\u5c06\u4e8b\u4ef6\u5206\u53d1\u5230\u76f8\u5e94\u7684\u201c\u4e8b\u4ef6\u5904\u7406\u5668\u201d\u8fdb\u884c\u5904\u7406\u3002\u5355\u7ebf\u7a0b\u6216\u5c11\u6570\u7ebf\u7a0b\u5904\u7406 I\/O\uff1a\u901a\u8fc7\u4e00\u4e2a\u6216\u5c11\u6570\u7ebf\u7a0b\u5904\u7406\u6240\u6709\u5ba2\u6237\u7aef\u7684 I\/O \u64cd\u4f5c\uff0c\u907f\u514d\u4e86\u7ebf\u7a0b\u7684\u9891\u7e41\u521b\u5efa\u4e0e\u9500\u6bc1\uff0c\u51cf\u5c11\u4e86\u7cfb\u7edf\u7684\u8d44\u6e90\u6d88\u8017\u3002\u5f02\u6b65 I\/O\uff1a\u901a\u8fc7\u975e\u963b\u585e\u7684 I\/O \u64cd\u4f5c\u548c\u4e8b\u4ef6\u901a\u77e5\u673a\u5236\uff0c\u4f7f\u5f97\u670d\u52a1\u5668\u80fd\u591f\u540c\u65f6\u5904\u7406\u5927\u91cf\u7684\u5ba2\u6237\u7aef\u8bf7\u6c42\u3002\u9ad8\u6548\u7684\u4e8b\u4ef6\u5206\u53d1\u673a\u5236\uff1aReactor \u6a21\u5f0f\u901a\u8fc7 I\/O \u591a\u8def\u590d\u7528\uff08\u5982selectepollkqueue\u3002_c++ reactor\u6a21\u5f0f<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[55,190],"topic":[],"class_list":["post-16019","post","type-post","status-publish","format-standard","hentry","category-server","tag-c","tag-190"],"yoast_head":"\n