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