{"id":21883082,"url":"https://github.com/fantasy-peak/reactor","last_synced_at":"2025-04-15T06:08:21.369Z","repository":{"id":129485478,"uuid":"360505792","full_name":"fantasy-peak/reactor","owner":"fantasy-peak","description":"C++17 and reactor mode task/timer 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reactor\n[![Build Status](https://travis-ci.com/fantasy-peak/reactor.svg?branch=main)](https://travis-ci.com/fantasy-peak/reactor)\n\nA C++17 single-file header-only, based on reactor mode, It can add tasks and timers and file descriptor to reactor(one loop one thread)\n\nSimple examples\n---------------\n#### create thread pool\n\n```c++\nauto thread_pool = std::make_unique\u003cfantasy::ThreadPool\u003e(2);\nauto get_thread_id = [] {\n    std::stringstream ss;\n    ss \u003c\u003c std::this_thread::get_id();\n    return ss.str();\n};\nstd::future\u003cstd::string\u003e ret_1 = thread_pool-\u003eenqueue([\u0026] {\n    spdlog::info(\"1 thread_id: {}\", get_thread_id());\n    std::this_thread::sleep_for(std::chrono::seconds(1));\n    return std::string{\"hello\"};\n});\nstd::future\u003cint32_t\u003e ret_2 = thread_pool-\u003eenqueue([\u0026] {\n    spdlog::info(\"2 thread_id: {}\", get_thread_id());\n    std::this_thread::sleep_for(std::chrono::seconds(1));\n    return 999;\n});\nstd::future\u003cdouble\u003e ret_3 = thread_pool-\u003eenqueue([\u0026] {\n    spdlog::info(\"3 thread_id: {}\", get_thread_id());\n    std::this_thread::sleep_for(std::chrono::seconds(1));\n    return 999.1;\n});\nspdlog::info(\"ret_1: {}\", ret_1.get());\nspdlog::info(\"ret_2: {}\", ret_2.get());\nspdlog::info(\"ret_3: {}\", ret_3.get());\n```\n\n#### add a task\n```c++\nfantasy::Reactor reactor;\nreactor.run();\n\n// It will run on the reactor thread, do not block the current thread\nreactor.callLater([\u0026] {\n    spdlog::info(\"task\");\n});\n\n// It will run on the reactor thread, block the current thread\nreactor.callNow([\u0026] {\n    spdlog::info(\"task\");\n});\n\n```\n\n#### add/remove a timed task\n```c++\nfantasy::Reactor reactor;\nreactor.run();\n\n// It will run in one second\nreactor.callAt(std::chrono::system_clock::now() + std::chrono::seconds(1),[] {\n    spdlog::info(\"callAt\");\n});\n\n// It will run in five second\nreactor.callAfter(std::chrono::seconds(5), [] {\n    spdlog::info(\"callAfter\");\n});\n\n// Run every three seconds\nreactor.callEvery(std::chrono::seconds(3), [] {\n    spdlog::info(\"callEvery\");\n    return fantasy::Reactor::CallStatus::Ok;\n});\n\n// Run every day 05:30:00\nauto id = reactor.callEveryDay(fantasy::Time{5, 30, 0, 0}, [] {\n    spdlog::info(\"callEveryDay\");\n    return fantasy::Reactor::CallStatus::Ok;\n});\n\n// cancel scheduled tasks\nreactor.cancel(id);\n\n```\n#### add file descriptor to reactor for read \u0026\u0026 write\n```c++\nfantasy::Reactor reactor;\nreactor.run();\nstd::string recv_buffer;\nint servfd;\nstruct sockaddr_in servaddr, cliaddr;\nif ((servfd = socket(AF_INET, SOCK_STREAM, 0)) \u003c 0) {\n    spdlog::info(\"create socket error!\");\n    exit(1);\n}\nbzero(\u0026servaddr, sizeof(servaddr));\nservaddr.sin_family = AF_INET;\nservaddr.sin_port = htons(SERVER_PORT);\nservaddr.sin_addr.s_addr = htons(INADDR_ANY);\nint opt = 1;\nsetsockopt(servfd, SOL_SOCKET, SO_REUSEADDR, (const void*)\u0026opt, sizeof(opt));\nif (bind(servfd, (struct sockaddr*)\u0026servaddr, sizeof(servaddr)) \u003c 0) {\n    spdlog::info(\"bind to port {} failure!\", SERVER_PORT);\n    exit(1);\n}\nif (listen(servfd, LENGTH_OF_LISTEN_QUEUE) \u003c 0) {\n    spdlog::info(\"call listen failure!\");\n    exit(1);\n}\nreactor.callOnRead(servfd, [\u0026](int fd, const std::weak_ptr\u003cfantasy::Reactor::Channel\u003e\u0026) mutable {\n    socklen_t length = sizeof(cliaddr);\n    int clifd = ::accept4(fd, (struct sockaddr*)\u0026cliaddr, \u0026length, SOCK_NONBLOCK | SOCK_CLOEXEC);\n    if (clifd \u003c 0) {\n        spdlog::error(\"error comes when call accept!\");\n        return fantasy::Reactor::CallStatus::Ok;\n    }\n    reactor.callOnRead(clifd, [\u0026](int fd, const std::weak_ptr\u003cfantasy::Reactor::Channel\u003e\u0026 channel_ptr) mutable {\n        spdlog::info(\"call callOnRead\");\n        char buffer[BUFFER_SIZE] = {};\n        auto n = read(fd, buffer, BUFFER_SIZE);\n        if (n \u003c 0) {\n            perror(\"read()\");\n            return fantasy::Reactor::CallStatus::Remove;\n        };\n        if (n == 0) {\n            spdlog::error(\"client close\");\n            return fantasy::Reactor::CallStatus::Remove;\n        }\n        spdlog::info(\"read: [{}], read buffer len: {}\", buffer, n);\n        recv_buffer = std::string{buffer};\n        if (auto spt = channel_ptr.lock())\n            spt-\u003eenableWriting();\n        return fantasy::Reactor::CallStatus::Ok;\n    });\n    reactor.callOnWrite(clifd, [\u0026](int fd, const std::weak_ptr\u003cfantasy::Reactor::Channel\u003e\u0026 channel_ptr) {\n        if (recv_buffer.empty())\n            return fantasy::Reactor::CallStatus::Ok;\n        spdlog::info(\"callOnWrite\");\n        char buffer[BUFFER_SIZE] = {};\n        memcpy(buffer, recv_buffer.c_str(), recv_buffer.size());\n        recv_buffer.clear();\n        spdlog::info(\"buffer: {}\", buffer);\n        auto n = write(fd, buffer, strlen(buffer));\n        if (n \u003c 0) {\n            perror(\"write()\");\n            exit(1);\n        }\n        if (auto spt = channel_ptr.lock())\n            spt-\u003edisableWriting();\n        return fantasy::Reactor::CallStatus::Ok;\n    });\n    return fantasy::Reactor::CallStatus::Ok;\n});\n```\n\n## Documentation\nYou can use connection pool and client separately\n* See [examples](https://github.com/fantasy-peak/reactor/tree/main/example)\n\n## Maintainers\n\n[@fantasy-peak](https://github.com/fantasy-peak)\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffantasy-peak%2Freactor","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Ffantasy-peak%2Freactor","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ffantasy-peak%2Freactor/lists"}