| /* Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
| file Copyright.txt or https://cmake.org/licensing for details. */ |
| #pragma once |
| #include "cmConfigure.h" // IWYU pragma: keep |
| |
| #include "cm_uv.h" |
| |
| #if defined(CMAKE_USE_SYSTEM_LIBUV) && !defined(_WIN32) && \ |
| UV_VERSION_MAJOR == 1 && UV_VERSION_MINOR < 19 |
| # define CMAKE_UV_SIGNAL_HACK |
| # include "cmUVHandlePtr.h" |
| /* |
| libuv does not use SA_RESTART on its signal handler, but C++ streams |
| depend on it for reliable i/o operations. This RAII helper convinces |
| libuv to install its handler, and then revises the handler to add the |
| SA_RESTART flag. We use a distinct uv loop that never runs to avoid |
| ever really getting a callback. libuv may fill the hack loop's signal |
| pipe and then stop writing, but that won't break any real loops. |
| */ |
| class cmUVSignalHackRAII |
| { |
| uv_loop_t HackLoop; |
| cm::uv_signal_ptr HackSignal; |
| static void HackCB(uv_signal_t*, int) {} |
| |
| public: |
| cmUVSignalHackRAII() |
| { |
| uv_loop_init(&this->HackLoop); |
| this->HackSignal.init(this->HackLoop); |
| this->HackSignal.start(HackCB, SIGCHLD); |
| struct sigaction hack_sa; |
| sigaction(SIGCHLD, nullptr, &hack_sa); |
| if (!(hack_sa.sa_flags & SA_RESTART)) { |
| hack_sa.sa_flags |= SA_RESTART; |
| sigaction(SIGCHLD, &hack_sa, nullptr); |
| } |
| } |
| ~cmUVSignalHackRAII() |
| { |
| this->HackSignal.stop(); |
| uv_loop_close(&this->HackLoop); |
| } |
| }; |
| #endif |