{"id":88177,"date":"2026-07-31T16:32:37","date_gmt":"2026-07-31T08:32:37","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/88177.html"},"modified":"2026-07-31T16:32:37","modified_gmt":"2026-07-31T08:32:37","slug":"%e9%ab%98%e5%b9%b6%e5%8f%91%e6%9c%8d%e5%8a%a1%e5%99%a8day6","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/88177.html","title":{"rendered":"\u9ad8\u5e76\u53d1\u670d\u52a1\u5668day6"},"content":{"rendered":"

Linux \u9ad8\u5e76\u53d1\u7f51\u7edc\u7f16\u7a0b：Socket \u5934\u6587\u4ef6\u63a2\u7a76\u4e0e Reactor \u6a21\u5f0f Channel \u7c7b\u8bbe\u8ba1<\/h2>\n

\u5728\u8fdb\u884c Linux C++ \u7f51\u7edc\u7f16\u7a0b\u65f6，\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u6df1\u5165\u7cfb\u7edf\u5e95\u5c42\u53bb\u67e5\u770b\u5b8f\u5b9a\u4e49，\u540c\u65f6\u5728\u6784\u5efa\u9ad8\u5e76\u53d1\u670d\u52a1\u5668（\u5982\u57fa\u4e8e Reactor \u6a21\u5f0f）\u65f6，\u6838\u5fc3\u7ec4\u4ef6\u7684\u8bbe\u8ba1\u4e5f\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u5c06\u5206\u4eab\u5982\u4f55\u5728 Linux \u73af\u5883\u4e0b\u9ad8\u6548\u67e5\u627e\u7cfb\u7edf\u5934\u6587\u4ef6，\u4ee5\u53ca Reactor \u6a21\u5f0f\u4e2d\u4e8b\u4ef6\u5206\u53d1\u6838\u5fc3\u7c7b Channel \u7684\u8bbe\u8ba1\u601d\u8def\u3002<\/p>\n

\u4e00\u3001 \u5b9e\u7528\u6280\u5de7：\u5728 Linux \u4e2d\u67e5\u627e\u7cfb\u7edf\u5934\u6587\u4ef6\u4e0e\u5b8f\u5b9a\u4e49<\/h3>\n

\u5728\u7f51\u7edc\u7f16\u7a0b\u4e2d，\u6211\u4eec\u6709\u65f6\u4f1a\u5fd8\u8bb0\u67d0\u4e2a\u5177\u4f53\u7684 Socket \u9009\u9879（\u5982 SO_REUSEADDR）\u5305\u542b\u5728\u54ea\u4e2a\u5934\u6587\u4ef6\u4e2d\u3002\u53ef\u4ee5\u901a\u8fc7\u7ec4\u5408\u4f7f\u7528 find \u548c grep \u547d\u4ee4\u6765\u5feb\u901f\u5b9a\u4f4d\u3002<\/p>\n

1. \u5b9a\u4f4d\u5934\u6587\u4ef6\u8def\u5f84<\/h4>\n

\u4f7f\u7528 find \u547d\u4ee4\u53ef\u4ee5\u5728 \/usr\/include\/ \u76ee\u5f55\u4e0b\u5feb\u901f\u641c\u7d22\u7279\u5b9a\u7684\u5934\u6587\u4ef6，\u4f8b\u5982 socket.h：<\/p>\n

Bash<\/p>\n<\/p>\n

# \u67e5\u627e socket.h \u7684\u5177\u4f53\u4f4d\u7f6e
\n$ find \/usr\/include\/ -name "socket.h"
\n\/usr\/include\/asm-generic\/socket.h
\n\/usr\/include\/x86_64-linux-gnu\/sys\/socket.h
\n\/usr\/include\/x86_64-linux-gnu\/bits\/socket.h
\n\/usr\/include\/x86_64-linux-gnu\/asm\/socket.h
\n\/usr\/include\/linux\/socket.h<\/p>\n

2. \u68c0\u7d22\u7279\u5b9a\u7684\u5b8f\u5b9a\u4e49<\/h4>\n

\u5f53\u6211\u4eec\u9700\u8981\u67e5\u627e SO_REUSEADDR（\u7aef\u53e3\u590d\u7528）\u7684\u5e95\u5c42\u5b9a\u4e49\u65f6，\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528 grep -R \u5bf9\u6574\u4e2a include \u76ee\u5f55\u8fdb\u884c\u9012\u5f52\u641c\u7d22，\u6216\u8005\u4f7f\u7528 vi \u76f4\u63a5\u67e5\u770b\u5bf9\u5e94\u7684\u5934\u6587\u4ef6\u5185\u5bb9：<\/p>\n

Bash<\/p>\n<\/p>\n

# \u4f7f\u7528 vi \u76f4\u63a5\u67e5\u770b\u5934\u6587\u4ef6
\n$ vi \/usr\/include\/x86_64-linux-gnu\/sys\/socket.h<\/p>\n

# \u9012\u5f52\u641c\u7d22\u5b8f\u5b9a\u4e49 SO_REUSEADDR
\n$ grep -R 'SO_REUSEADDR' \/usr\/include\/<\/p>\n

(\u6ce8：\u641c\u7d22\u65f6\u8bf7\u6ce8\u610f\u62fc\u5199\u51c6\u786e，\u5982\u6392\u67e5\u65f6\u9047\u5230\u62fc\u5199\u9519\u8bef SOL_REUSEADDR，\u53ef\u901a\u8fc7\u6269\u5927\u68c0\u7d22\u8303\u56f4\u91cd\u65b0\u4fee\u6b63\u5373\u53ef\u3002)<\/p>\n

\u4e8c\u3001 Reactor \u6838\u5fc3\u7ec4\u4ef6：Channel \u7c7b\u8bbe\u8ba1\u4e0e\u5256\u6790<\/h3>\n

\u5728 Reactor \u67b6\u6784\u4e2d，Channel \u7c7b\u662f\u8fde\u63a5\u6587\u4ef6\u63cf\u8ff0\u7b26（fd）\u4e0e\u4e8b\u4ef6\u5faa\u73af（EventLoop）\u7684\u6865\u6881\u3002\u5b83\u7684\u6838\u5fc3\u76ee\u7684\u53ea\u6709\u4e00\u4e2a：\u5bf9\u63cf\u8ff0\u7b26\u7684\u76d1\u63a7\u4e8b\u4ef6\u8fdb\u884c\u96c6\u4e2d\u7ba1\u7406\u4e0e\u5206\u53d1\u3002<\/p>\n

\u4ee5\u4e0b\u662f Channel \u7c7b\u7684\u6838\u5fc3\u529f\u80fd\u4e0e\u8bbe\u8ba1\u903b\u8f91\u68b3\u7406：<\/p>\n

1. Epoll \u4e8b\u4ef6\u6620\u5c04\u4e0e\u72b6\u6001\u5b58\u50a8<\/h4>\n

\u7531\u4e8e\u5e95\u5c42\u4f9d\u8d56 epoll \u8fdb\u884c I\/O \u591a\u8def\u590d\u7528\u76d1\u63a7，\u6211\u4eec\u9700\u8981\u5c06\u5173\u5fc3\u7684\u4e8b\u4ef6\u6620\u5c04\u4e3a epoll \u63d0\u4f9b\u7684\u5b8f\u5b9a\u4e49\u3002\u8fd9\u4e9b\u4e8b\u4ef6\u5728\u5e95\u5c42\u5747\u4ee5 uint32_t \u7c7b\u578b\u7684\u6570\u503c\u8fdb\u884c\u4fdd\u5b58\u3002<\/p>\n

Epoll \u6838\u5fc3\u4e8b\u4ef6\u8868：<\/p>\n\n\n\n\n\n\n\n\n\n
\u5b8f\u5b9a\u4e49<\/td>\n\u4e8b\u4ef6\u542b\u4e49<\/td>\n\u89e6\u53d1\u573a\u666f<\/td>\n<\/tr>\n
EPOLLIN<\/td>\n\u53ef\u8bfb<\/td>\n\u7f13\u51b2\u533a\u6709\u6570\u636e\u53ef\u8bfb\u3001\u65b0\u8fde\u63a5\u5230\u8fbe\u7b49<\/td>\n<\/tr>\n
EPOLLOUT<\/td>\n\u53ef\u5199<\/td>\n\u7f13\u51b2\u533a\u6709\u7a7a\u95f4\u53ef\u5199<\/td>\n<\/tr>\n
EPOLLRDHUP<\/td>\n\u8fde\u63a5\u65ad\u5f00<\/td>\n\u5bf9\u7aef\u5173\u95ed\u8fde\u63a5\u6216\u534a\u5173\u95ed<\/td>\n<\/tr>\n
EPOLLPRI<\/td>\n\u4f18\u5148\u6570\u636e<\/td>\n\u6709\u7d27\u6025\/\u4f18\u5148\u6570\u636e\u53ef\u8bfb<\/td>\n<\/tr>\n
EPOLLERR<\/td>\n\u9519\u8bef<\/td>\n\u63cf\u8ff0\u7b26\u53d1\u751f\u9519\u8bef<\/td>\n<\/tr>\n
EPOLLHUP<\/td>\n\u6302\u65ad<\/td>\n\u63cf\u8ff0\u7b26\u88ab\u6302\u65ad<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6210\u5458\u53d8\u91cf\u8bbe\u8ba1：<\/p>\n

\u4e3a\u4e86\u8fdb\u884c\u4e8b\u4ef6\u7ba1\u7406，Channel \u5185\u90e8\u5fc5\u987b\u7ef4\u62a4\u4e00\u4e2a uint32_t \u7c7b\u578b\u7684\u6838\u5fc3\u6210\u5458\u53d8\u91cf，\u7528\u4e8e\u4fdd\u5b58\u5f53\u524d\u8be5\u63cf\u8ff0\u7b26\u6b63\u5728\u88ab\u76d1\u63a7\u7684\u4e8b\u4ef6\u96c6\u5408（events）\u3002<\/p>\n

2. \u63a5\u53e3\u62bd\u8c61：\u4e8b\u4ef6\u7684\u6ce8\u518c\u4e0e\u6ce8\u9500<\/h4>\n

Channel \u9700\u8981\u5411\u4e0a\u5c42\u63d0\u4f9b\u4e00\u5957\u6e05\u6670\u7684\u64cd\u4f5c\u63a5\u53e3，\u7528\u4e8e\u7ba1\u7406\u5e95\u5c42\u63cf\u8ff0\u7b26\u7684\u76d1\u63a7\u72b6\u6001\u3002\u4e3b\u8981\u5305\u542b\u4e24\u7c7b\u64cd\u4f5c：<\/p>\n

    \n
  • \n

    \u72b6\u6001\u67e5\u8be2 (Status Check)：<\/p>\n

      \n
    • \n

      \u5224\u65ad\u5f53\u524d\u63cf\u8ff0\u7b26\u662f\u5426\u5904\u4e8e\u201c\u53ef\u8bfb\u201d\u76d1\u63a7\u72b6\u6001\u3002<\/p>\n<\/li>\n

    • \n

      \u5224\u65ad\u5f53\u524d\u63cf\u8ff0\u7b26\u662f\u5426\u5904\u4e8e\u201c\u53ef\u5199\u201d\u76d1\u63a7\u72b6\u6001\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n

    • \n

      \u72b6\u6001\u53d8\u66f4 (State Modification)：<\/p>\n

        \n
      • \n

        \u5f00\u542f\u76d1\u63a7：\u5f00\u542f\u53ef\u8bfb\u4e8b\u4ef6\u76d1\u63a7\u3001\u5f00\u542f\u53ef\u5199\u4e8b\u4ef6\u76d1\u63a7\u3002<\/p>\n<\/li>\n

      • \n

        \u89e3\u9664\u76d1\u63a7：\u89e3\u9664\u53ef\u8bfb\u4e8b\u4ef6\u76d1\u63a7\u3001\u89e3\u9664\u53ef\u5199\u4e8b\u4ef6\u76d1\u63a7\u3001\u89e3\u9664\u6240\u6709\u4e8b\u4ef6\u76d1\u63a7\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n

        3. \u4e8b\u4ef6\u89e6\u53d1\u540e\u7684\u56de\u8c03\u7ba1\u7406 (Callback Management)<\/h4>\n

        \u5f53 epoll_wait \u8fd4\u56de\u5c31\u7eea\u4e8b\u4ef6\u540e，Channel \u9700\u8981\u8d1f\u8d23\u5c06\u5177\u4f53\u7684\u4e8b\u4ef6\u5206\u53d1\u7ed9\u5bf9\u5e94\u7684\u5904\u7406\u903b\u8f91\u3002\u4e3a\u6b64，\u6211\u4eec\u9700\u8981\u5728\u7c7b\u4e2d\u63d0\u524d\u6ce8\u518c\u597d\u4e8b\u4ef6\u5904\u7406\u7684\u56de\u8c03\u51fd\u6570\u3002<\/p>\n

        \u6839\u636e\u7f51\u7edc\u901a\u4fe1\u4e2d\u7684\u5b9e\u9645\u573a\u666f，\u901a\u5e38\u9700\u8981\u5904\u7406\u4ee5\u4e0b \u4e94\u79cd\u6838\u5fc3\u4e8b\u4ef6：<\/p>\n

      • \n

        \u53ef\u8bfb\u4e8b\u4ef6 (Read Event)<\/p>\n<\/li>\n

      • \n

        \u53ef\u5199\u4e8b\u4ef6 (Write Event)<\/p>\n<\/li>\n

      • \n

        \u6302\u65ad\u4e8b\u4ef6 (Close\/Hangup Event)<\/p>\n<\/li>\n

      • \n

        \u9519\u8bef\u4e8b\u4ef6 (Error Event)<\/p>\n<\/li>\n

      • \n

        \u4efb\u610f\u901a\u7528\u4e8b\u4ef6 (Any\/Custom Event)<\/p>\n<\/li>\n

        \u8bbe\u8ba1\u7ed3\u8bba： \u56e0\u4e3a\u6709\u4e94\u79cd\u5177\u4f53\u573a\u666f\u9700\u8981\u88ab\u5904\u7406，Channel \u5185\u90e8\u5fc5\u987b\u7ef4\u62a4\u4e94\u4e2a\u5bf9\u5e94\u7684\u56de\u8c03\u51fd\u6570\u6210\u5458（\u901a\u5e38\u4f7f\u7528 std::function \u5b9e\u73b0），\u4ee5\u4fbf\u5728\u4e0d\u540c\u4e8b\u4ef6\u89e6\u53d1\u65f6，\u7cbe\u51c6\u6267\u884c\u5bf9\u5e94\u7684\u4e1a\u52a1\u903b\u8f91\u3002<\/p>\n<\/p>\n

        \u4e3a\u4ec0\u4e48witecallback\u5728\u524d\u9762，\u6709\u53ef\u80fd\u53d1\u9001\u5f88\u5927\u6570\u636e，\u8fde\u63a5\u8d85\u65f6，\u53d1\u9001\u5b8c\u8d76\u7d27\u5237\u65b0\u6d3b\u8dc3\u5ea6<\/p>\n

        C++ \u9ad8\u5e76\u53d1\u7f51\u7edc\u7f16\u7a0b：Reactor \u6a21\u5f0f\u4e0b Poller \u6a21\u5757\u7684\u8bbe\u8ba1\u4e0e\u5c01\u88c5<\/h2>\n

        \u5728\u6784\u5efa\u9ad8\u6027\u80fd\u7684\u7f51\u7edc\u670d\u52a1\u7aef\u67b6\u6784\u65f6，\u5982\u4f55\u9ad8\u6548\u5730\u76d1\u63a7\u548c\u7ba1\u7406\u6d77\u91cf\u5e76\u53d1\u8fde\u63a5\u7684 I\/O \u4e8b\u4ef6\u662f\u6574\u4e2a\u7cfb\u7edf\u7684\u6838\u5fc3\u3002\u5728 Reactor \u6a21\u5f0f\u4e2d，Poller \u6a21\u5757\u626e\u6f14\u7740\u201c\u4e8b\u4ef6\u591a\u8def\u5206\u53d1\u5668\u201d\u7684\u89d2\u8272\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u62c6\u89e3\u57fa\u4e8e epoll \u7684 Poller \u7c7b\u7684\u8bbe\u8ba1\u601d\u8def\u4e0e\u6838\u5fc3\u903b\u8f91\u3002<\/p>\n

        \u4e00\u3001 Poller \u6a21\u5757\u7684\u6838\u5fc3\u610f\u4e49\u4e0e\u529f\u80fd<\/h3>\n

        Poller \u672c\u8d28\u4e0a\u662f\u5bf9\u5e95\u5c42 epoll \u673a\u5236\u7684\u9762\u5411\u5bf9\u8c61\u5c01\u88c5\u3002\u5b83\u7684\u6838\u5fc3\u804c\u8d23\u662f：\u5b9e\u73b0\u5bf9\u6587\u4ef6\u63cf\u8ff0\u7b26（fd）\u7684 I\/O \u4e8b\u4ef6\u76d1\u63a7，\u5e76\u5728\u4e8b\u4ef6\u5c31\u7eea\u65f6\u8def\u7531\u5230\u5bf9\u5e94\u7684\u5904\u7406\u6a21\u5757\u3002<\/p>\n

        \u4f5c\u4e3a\u4e00\u4e2a\u9ed1\u76d2\u6a21\u5757，Poller \u5bf9\u4e0a\u5c42\u5c4f\u853d\u4e86\u5e95\u5c42 epoll_ctl \u548c epoll_wait \u7684\u590d\u6742\u7ec6\u8282，\u4ec5\u5bf9\u5916\u66b4\u9732\u6700\u7cbe\u7b80\u7684\u529f\u80fd\u63a5\u53e3：<\/p>\n

          \n
        • \n

          \u6dfb\u52a0 \/ \u4fee\u6539\u76d1\u63a7：\u5f53\u63cf\u8ff0\u7b26\u4e0d\u5b58\u5728\u65f6\u6dfb\u52a0\u76d1\u63a7；\u5f53\u63cf\u8ff0\u7b26\u5df2\u5b58\u5728\u65f6\u66f4\u65b0\u5176\u76d1\u63a7\u4e8b\u4ef6\u3002<\/p>\n<\/li>\n

        • \n

          \u79fb\u9664\u76d1\u63a7：\u505c\u6b62\u5bf9\u67d0\u4e2a\u63cf\u8ff0\u7b26\u7684\u6240\u6709\u4e8b\u4ef6\u76d1\u63a7，\u5e76\u5c06\u5176\u4ece\u5e95\u5c42\u7ed3\u6784\u4e2d\u79fb\u9664\u3002<\/p>\n<\/li>\n<\/ul>\n

          \u4e8c\u3001 \u6838\u5fc3\u5c01\u88c5\u601d\u60f3\u4e0e\u6570\u636e\u7ed3\u6784<\/h3>\n

          \u4e3a\u4e86\u5b9e\u73b0\u9ad8\u6548\u7684\u4e8b\u4ef6\u68c0\u7d22\u4e0e\u72b6\u6001\u66f4\u65b0，Poller \u7c7b\u5728\u5185\u90e8\u8bbe\u8ba1\u4e86\u4e09\u4e2a\u975e\u5e38\u5173\u952e\u7684\u6210\u5458\u53d8\u91cf\u3002<\/p>\n

          Poller \u7c7b\u7684\u6838\u5fc3\u6210\u5458：<\/p>\n\n\n\n\n\n\n
          \u6210\u5458\u53d8\u91cf<\/td>\n\u7c7b\u578b<\/td>\n\u6838\u5fc3\u4f5c\u7528<\/td>\n<\/tr>\n
          _epfd<\/td>\nint<\/td>\nepoll \u64cd\u4f5c\u53e5\u67c4\u3002\u7531 epoll_create \u521b\u5efa，\u662f\u6240\u6709\u5e95\u5c42\u64cd\u4f5c\u7684\u57fa\u7840\u3002<\/td>\n<\/tr>\n
          _evs<\/td>\nstruct epoll_event \u6570\u7ec4<\/td>\n\u6d3b\u8dc3\u4e8b\u4ef6\u7f13\u51b2\u533a\u3002\u5728\u8c03\u7528 epoll_wait \u65f6，\u7528\u4e8e\u4e00\u6b21\u6027\u83b7\u53d6\u5e76\u4fdd\u5b58\u6240\u6709\u5df2\u5c31\u7eea（\u6d3b\u8dc3）\u7684\u8fde\u63a5\u4e8b\u4ef6\u3002<\/td>\n<\/tr>\n
          _channels<\/td>\nstd::unordered_map<int, Channel*><\/td>\n\u6620\u5c04\u54c8\u5e0c\u8868\u3002\u5b9e\u73b0 fd \u5230\u5bf9\u5e94\u7684 Channel \u5bf9\u8c61\u7684 O(1) \u5feb\u901f\u67e5\u627e\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

          \u4e3a\u4ec0\u4e48\u9700\u8981\u7528\u5230\u6620\u5c04\u8868（Map）？<\/p>\n

          \u5f53 epoll \u53d1\u73b0\u67d0\u4e2a\u63cf\u8ff0\u7b26\u5c31\u7eea\u65f6，\u5b83\u53ea\u80fd\u63d0\u4f9b\u8be5\u63cf\u8ff0\u7b26\u7684\u503c\u3002\u4f46\u5177\u4f53\u8fd9\u4e2a\u63cf\u8ff0\u7b26\u5173\u8054\u4e86\u54ea\u4e9b\u56de\u8c03\u51fd\u6570\u3001\u5e94\u8be5\u5982\u4f55\u5904\u7406，\u8fd9\u4e9b\u4fe1\u606f\u90fd\u5c01\u88c5\u5728\u5bf9\u5e94\u7684 Channel \u5bf9\u8c61\u4e2d\u3002\u56e0\u6b64，\u5fc5\u987b\u901a\u8fc7 unordered_map \u5c06\u5c31\u7eea\u7684\u63cf\u8ff0\u7b26\u91cd\u65b0\u6620\u5c04\u56de\u5b83\u7684 Channel\u3002<\/p>\n

          \u4e09\u3001 \u7c7b\u7684\u63a5\u53e3\u8bbe\u8ba1<\/h3>\n

          \u6839\u636e\u4e0a\u8ff0\u601d\u60f3，Poller \u7c7b\u7684\u7ed3\u6784\u53ef\u4ee5\u8bbe\u8ba1\u5982\u4e0b：<\/p>\n

          1. \u79c1\u6709\u8f85\u52a9\u65b9\u6cd5 (Private)<\/h4>\n

          \u4e3a\u4e86\u4fdd\u8bc1\u516c\u6709\u63a5\u53e3\u7684\u7b80\u6d01，\u5e95\u5c42\u5177\u4f53\u7684\u68c0\u67e5\u4e0e\u7cfb\u7edf\u8c03\u7528\u5e94\u88ab\u9690\u85cf\u5728\u79c1\u6709\u65b9\u6cd5\u4e2d：<\/p>\n

            \n
          • \n

            \u72b6\u6001\u6821\u9a8c：\u5224\u65ad\u5f53\u524d\u9700\u8981\u66f4\u65b0\u6216\u79fb\u9664\u7684\u63cf\u8ff0\u7b26\u662f\u5426\u5df2\u7ecf\u5b58\u5728\u4e8e _channels \u6620\u5c04\u8868\u4e2d\u3002<\/p>\n<\/li>\n

          • \n

            \u5e95\u5c42\u64cd\u4f5c：\u9488\u5bf9 epoll_ctl \u7684\u76f4\u63a5\u5c01\u88c5，\u4e13\u95e8\u6267\u884c\u5177\u4f53\u7684 EPOLL_CTL_ADD（\u6dfb\u52a0）\u3001EPOLL_CTL_MOD（\u4fee\u6539）\u548c EPOLL_CTL_DEL（\u79fb\u9664）\u64cd\u4f5c\u3002<\/p>\n<\/li>\n<\/ul>\n

            2. \u516c\u6709\u64cd\u4f5c\u63a5\u53e3 (Public)<\/h4>\n

            \u5bf9\u5916\u63d0\u4f9b\u7684\u63a5\u53e3\u5e94\u5f53\u505a\u5230\u201c\u6781\u7b80\u201d，\u8c03\u7528\u65b9（\u901a\u5e38\u662f EventLoop）\u4e0d\u9700\u8981\u5173\u5fc3\u5185\u90e8\u662f\u8be5\u201c\u6dfb\u52a0\u201d\u8fd8\u662f\u201c\u4fee\u6539\u201d，\u53ea\u9700\u4e0b\u53d1\u6307\u4ee4\u5373\u53ef：<\/p>\n

              \n
            • \n

              Update(Channel* channel)：\u6dfb\u52a0\u6216\u66f4\u65b0\u63cf\u8ff0\u7b26\u6240\u76d1\u63a7\u7684\u4e8b\u4ef6\u3002\u5185\u90e8\u903b\u8f91\u4f1a\u5148\u5229\u7528\u79c1\u6709\u65b9\u6cd5\u5224\u65ad\u63cf\u8ff0\u7b26\u662f\u5426\u5b58\u5728\u2014\u2014\u6709\u5c31\u66f4\u65b0，\u6ca1\u6709\u5c31\u6dfb\u52a0\u3002<\/p>\n<\/li>\n

            • \n

              Remove(Channel* channel)：\u79fb\u9664\u63cf\u8ff0\u7b26\u7684\u5e95\u5c42\u76d1\u63a7，\u5e76\u6e05\u7406\u54c8\u5e0c\u8868\u4e2d\u7684\u8bb0\u5f55\u3002<\/p>\n<\/li>\n

            • \n

              \u5f00\u59cb\u76d1\u63a7，\u83b7\u53d6\u5c31\u7eea\u7684channel<\/p>\n<\/li>\n<\/ul>\n

              \u56db\u3001 Poller \u7684\u5b8c\u6574\u8fd0\u8f6c\u903b\u8f91\u6d41<\/h3>\n

              \u6574\u4e2a\u6a21\u5757\u4ece\u6ce8\u518c\u5230\u89e6\u53d1\u7684\u5b8c\u6574\u751f\u547d\u5468\u671f\u53ef\u4ee5\u7528\u4ee5\u4e0b\u4e24\u4e2a\u9636\u6bb5\u6765\u6982\u62ec：<\/p>\n

              \u9636\u6bb5 1：\u4e8b\u4ef6\u6ce8\u518c\u4e0e\u4fe1\u606f\u540c\u6b65<\/p>\n

              \u7cfb\u7edf\u60f3\u8981\u76d1\u63a7\u67d0\u4e2a\u63cf\u8ff0\u7b26\u65f6，\u5fc5\u987b\u5148\u5c06\u5176\u5c01\u88c5\u4e3a\u4e00\u4e2a Channel\u3002\u901a\u8fc7\u8c03\u7528 Poller \u7684\u63a5\u53e3，Poller \u4f1a\u8bfb\u53d6 Channel \u4e2d\u8bb0\u5f55\u7684\u5173\u5207\u4e8b\u4ef6（\u5982\u53ef\u8bfb\u3001\u53ef\u5199），\u8fdb\u800c\u8c03\u7528 epoll_ctl \u6ce8\u518c\u5230\u5e95\u5c42\u5185\u6838\u4e2d，\u540c\u65f6\u5c06\u8be5 <fd, Channel*> \u952e\u503c\u5bf9\u5b58\u5165\u5185\u90e8\u7684 unordered_map\u3002<\/p>\n

              \u9636\u6bb5 2：\u4e8b\u4ef6\u5c31\u7eea\u4e0e\u7cbe\u51c6\u8def\u7531<\/p>\n

            • \n

              \u968f\u7740\u7a0b\u5e8f\u7684\u8fd0\u884c，\u4e00\u65e6\u6709\u7f51\u7edc\u6d3b\u52a8\u53d1\u751f，epoll_wait \u89e6\u53d1\u5e76\u5524\u9192\u3002<\/p>\n<\/li>\n

            • \n

              Poller \u5185\u90e8\u7684 _evs \u6570\u7ec4\u88ab\u5185\u6838\u586b\u6ee1\u5f53\u524d\u6240\u6709\u83b7\u53d6\u5230\u7684\u6d3b\u8dc3\u8fde\u63a5\u4e8b\u4ef6\u3002<\/p>\n<\/li>\n

            • \n

              Poller \u904d\u5386\u8fd9\u4e2a\u6570\u7ec4，\u63d0\u53d6\u51fa\u6bcf\u4e00\u4e2a\u5c31\u7eea\u7684\u63cf\u8ff0\u7b26（fd）\u3002<\/p>\n<\/li>\n

            • \n

              \u901a\u8fc7\u8be5 fd \u53bb\u67e5\u5185\u90e8\u7684\u54c8\u5e0c\u8868，\u8fc5\u901f\u627e\u5230\u5176\u5bf9\u5e94\u7684 Channel \u5bf9\u8c61\u3002<\/p>\n<\/li>\n

            • \n

              \u5c06\u627e\u5230\u7684\u4e00\u7cfb\u5217\u5c31\u7eea Channel \u8fd4\u56de\u7ed9\u4e0a\u5c42\u6a21\u5757，\u4e0a\u5c42\u5373\u53ef\u6839\u636e Channel \u5185\u90e8\u7ed1\u5b9a\u7684\u56de\u8c03\u51fd\u6570，\u660e\u786e\u77e5\u9053\u4ec0\u4e48\u4e8b\u4ef6\u8be5\u5982\u4f55\u5904\u7406\u3002<\/p>\n<\/li>\n","protected":false},"excerpt":{"rendered":"

              Linux \u9ad8\u5e76\u53d1\u7f51\u7edc\u7f16\u7a0b：Socket \u5934\u6587\u4ef6\u63a2\u7a76\u4e0e Reactor \u6a21\u5f0f Channel \u7c7b\u8bbe\u8ba1\u5728\u8fdb\u884c Linux C \u7f51\u7edc\u7f16\u7a0b\u65f6，\u6211\u4eec\u7ecf\u5e38\u9700\u8981\u6df1\u5165\u7cfb\u7edf\u5e95\u5c42\u53bb\u67e5\u770b\u5b8f\u5b9a\u4e49，\u540c\u65f6\u5728\u6784\u5efa\u9ad8\u5e76\u53d1\u670d\u52a1\u5668（\u5982\u57fa\u4e8e Reactor \u6a21\u5f0f）\u65f6，\u6838\u5fc3\u7ec4\u4ef6\u7684\u8bbe\u8ba1\u4e5f\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u5c06\u5206\u4eab\u5982\u4f55\u5728 Linux \u73af\u5883\u4e0b\u9ad8\u6548\u67e5\u627e\u7cfb\u7edf\u5934\u6587\u4ef6，\u4ee5\u53ca Reactor \u6a21\u5f0f\u4e2d\u4e8b\u4ef6\u5206\u53d1\u6838\u5fc3\u7c7b Channel \u7684\u8bbe\u8ba1\u601d<\/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":[43,44],"topic":[],"class_list":["post-88177","post","type-post","status-publish","format-standard","hentry","category-server","tag-43","tag-44"],"yoast_head":"\n\u9ad8\u5e76\u53d1\u670d\u52a1\u5668day6 - 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