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- #ifndef BOOST_ASIO_DETAIL_POSIX_SIGNAL_BLOCKER_HPP
- #define BOOST_ASIO_DETAIL_POSIX_SIGNAL_BLOCKER_HPP
- #if defined(_MSC_VER) && (_MSC_VER >= 1200)
- # pragma once
- #endif
- #include <boost/asio/detail/config.hpp>
- #if defined(BOOST_ASIO_HAS_PTHREADS)
- #include <csignal>
- #include <pthread.h>
- #include <signal.h>
- #include <boost/asio/detail/noncopyable.hpp>
- #include <boost/asio/detail/push_options.hpp>
- namespace boost {
- namespace asio {
- namespace detail {
- class posix_signal_blocker
- : private noncopyable
- {
- public:
-
- posix_signal_blocker()
- : blocked_(false)
- {
- sigset_t new_mask;
- sigfillset(&new_mask);
- blocked_ = (pthread_sigmask(SIG_BLOCK, &new_mask, &old_mask_) == 0);
- }
-
- ~posix_signal_blocker()
- {
- if (blocked_)
- pthread_sigmask(SIG_SETMASK, &old_mask_, 0);
- }
-
- void block()
- {
- if (!blocked_)
- {
- sigset_t new_mask;
- sigfillset(&new_mask);
- blocked_ = (pthread_sigmask(SIG_BLOCK, &new_mask, &old_mask_) == 0);
- }
- }
-
- void unblock()
- {
- if (blocked_)
- blocked_ = (pthread_sigmask(SIG_SETMASK, &old_mask_, 0) != 0);
- }
- private:
-
- bool blocked_;
-
- sigset_t old_mask_;
- };
- }
- }
- }
- #include <boost/asio/detail/pop_options.hpp>
- #endif
- #endif
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