80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
// Copyright (c) 2006, 2007 Julio M. Merino Vidal
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// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
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// Copyright (c) 2009 Boris Schaeling
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// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
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// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
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// Copyright (c) 2016 Klemens D. Morgenstern
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_PROCESS_POSIX_SIGNAL_HPP
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#define BOOST_PROCESS_POSIX_SIGNAL_HPP
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#include <boost/process/detail/posix/handler.hpp>
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#include <signal.h>
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namespace boost { namespace process { namespace detail { namespace posix {
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#if defined(__GLIBC__)
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using sighandler_t = ::sighandler_t;
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#else
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using sighandler_t = void(*)(int);
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#endif
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struct sig_init_ : handler_base_ext
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{
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sig_init_ (sighandler_t handler) : _handler(handler) {}
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template <class PosixExecutor>
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void on_exec_setup(PosixExecutor&)
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{
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_old = ::signal(SIGCHLD, _handler);
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}
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template <class Executor>
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void on_error(Executor&, const std::error_code &)
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{
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if (!_reset)
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{
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::signal(SIGCHLD, _old);
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_reset = true;
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}
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}
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template <class Executor>
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void on_success(Executor&)
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{
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if (!_reset)
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{
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::signal(SIGCHLD, _old);
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_reset = true;
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}
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}
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private:
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bool _reset = false;
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::boost::process::detail::posix::sighandler_t _old{0};
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::boost::process::detail::posix::sighandler_t _handler{0};
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};
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struct sig_
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{
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constexpr sig_() {}
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sig_init_ operator()(::boost::process::detail::posix::sighandler_t h) const {return h;}
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sig_init_ operator= (::boost::process::detail::posix::sighandler_t h) const {return h;}
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sig_init_ dfl() const {return SIG_DFL;}
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sig_init_ ign() const {return SIG_IGN;}
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};
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}}}}
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#endif
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