// Copyright Oliver Kowalke 2013. // 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) // // based on boost::interprocess::sync::interprocess_spinlock #ifndef BOOST_FIBERS_RECURSIVE_TIMED_MUTEX_H #define BOOST_FIBERS_RECURSIVE_TIMED_MUTEX_H #include <chrono> #include <cstddef> #include <boost/config.hpp> #include <boost/assert.hpp> #include <boost/fiber/context.hpp> #include <boost/fiber/detail/config.hpp> #include <boost/fiber/detail/convert.hpp> #include <boost/fiber/detail/spinlock.hpp> #ifdef BOOST_HAS_ABI_HEADERS # include BOOST_ABI_PREFIX #endif #ifdef _MSC_VER # pragma warning(push) # pragma warning(disable:4251) #endif namespace boost { namespace fibers { class condition_variable; class BOOST_FIBERS_DECL recursive_timed_mutex { private: friend class condition_variable; typedef context::wait_queue_t wait_queue_t; context * owner_{ nullptr }; std::size_t count_{ 0 }; wait_queue_t wait_queue_{}; detail::spinlock wait_queue_splk_{}; bool try_lock_until_( std::chrono::steady_clock::time_point const& timeout_time) noexcept; public: recursive_timed_mutex() = default; ~recursive_timed_mutex() { BOOST_ASSERT( nullptr == owner_); BOOST_ASSERT( 0 == count_); BOOST_ASSERT( wait_queue_.empty() ); } recursive_timed_mutex( recursive_timed_mutex const&) = delete; recursive_timed_mutex & operator=( recursive_timed_mutex const&) = delete; void lock(); bool try_lock() noexcept; template< typename Clock, typename Duration > bool try_lock_until( std::chrono::time_point< Clock, Duration > const& timeout_time_) { std::chrono::steady_clock::time_point timeout_time( detail::convert( timeout_time_) ); return try_lock_until_( timeout_time); } template< typename Rep, typename Period > bool try_lock_for( std::chrono::duration< Rep, Period > const& timeout_duration) { return try_lock_until_( std::chrono::steady_clock::now() + timeout_duration); } void unlock(); }; }} #ifdef _MSC_VER # pragma warning(pop) #endif #ifdef BOOST_HAS_ABI_HEADERS # include BOOST_ABI_SUFFIX #endif #endif // BOOST_FIBERS_RECURSIVE_TIMED_MUTEX_H