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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 | ||
29 | sig_init_ (sighandler_t handler) : _handler(handler) {} | |
30 | ||
31 | template <class PosixExecutor> | |
32 | void on_exec_setup(PosixExecutor&) | |
33 | { | |
34 | _old = ::signal(SIGCHLD, _handler); | |
35 | } | |
36 | ||
37 | template <class Executor> | |
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> | |
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 | { | |
64 | constexpr sig_() {} | |
65 | ||
66 | sig_init_ operator()(::boost::process::detail::posix::sighandler_t h) const {return h;} | |
67 | sig_init_ operator= (::boost::process::detail::posix::sighandler_t h) const {return h;} | |
68 | sig_init_ dfl() const {return SIG_DFL;} | |
69 | sig_init_ ign() const {return SIG_IGN;} | |
70 | ||
71 | }; | |
72 | ||
73 | ||
74 | ||
75 | ||
76 | ||
77 | }}}} | |
78 | ||
79 | #endif |