1 // Copyright (c) 2006, 2007 Julio M. Merino Vidal 2 // Copyright (c) 2008 Ilya Sokolov, Boris Schaeling 3 // Copyright (c) 2009 Boris Schaeling 4 // Copyright (c) 2010 Felipe Tanus, Boris Schaeling 5 // Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling 6 // Copyright (c) 2016 Klemens D. Morgenstern 7 // 8 // Distributed under the Boost Software License, Version 1.0. (See accompanying 9 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 10 11 #ifndef BOOST_PROCESS_POSIX_SIGNAL_HPP 12 #define BOOST_PROCESS_POSIX_SIGNAL_HPP 13 14 #include <boost/process/detail/posix/handler.hpp> 15 #include <signal.h> 16 17 namespace boost { namespace process { namespace detail { namespace posix { 18 19 #if defined(__GLIBC__) 20 using sighandler_t = ::sighandler_t; 21 #else 22 using sighandler_t = void(*)(int); 23 #endif 24 25 26 struct sig_init_ : handler_base_ext 27 { 28 sig_init_boost::process::detail::posix::sig_init_29 sig_init_ (sighandler_t handler) : _handler(handler) {} 30 31 template <class PosixExecutor> on_exec_setupboost::process::detail::posix::sig_init_32 void on_exec_setup(PosixExecutor&) 33 { 34 _old = ::signal(SIGCHLD, _handler); 35 } 36 37 template <class Executor> on_errorboost::process::detail::posix::sig_init_38 void on_error(Executor&, const std::error_code &) 39 { 40 if (!_reset) 41 { 42 ::signal(SIGCHLD, _old); 43 _reset = true; 44 } 45 } 46 47 template <class Executor> on_successboost::process::detail::posix::sig_init_48 void on_success(Executor&) 49 { 50 if (!_reset) 51 { 52 ::signal(SIGCHLD, _old); 53 _reset = true; 54 } 55 } 56 private: 57 bool _reset = false; 58 ::boost::process::detail::posix::sighandler_t _old{0}; 59 ::boost::process::detail::posix::sighandler_t _handler{0}; 60 }; 61 62 struct sig_ 63 { sig_boost::process::detail::posix::sig_64 constexpr sig_() {} 65 operator ()boost::process::detail::posix::sig_66 sig_init_ operator()(::boost::process::detail::posix::sighandler_t h) const {return h;} operator =boost::process::detail::posix::sig_67 sig_init_ operator= (::boost::process::detail::posix::sighandler_t h) const {return h;} dflboost::process::detail::posix::sig_68 sig_init_ dfl() const {return SIG_DFL;} ignboost::process::detail::posix::sig_69 sig_init_ ign() const {return SIG_IGN;} 70 71 }; 72 73 74 75 76 77 }}}} 78 79 #endif 80