1231 lines
35 KiB
Plaintext
1231 lines
35 KiB
Plaintext
// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// (C) Copyright 2007 Anthony Williams
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// (C) Copyright 2011-2012 Vicente J. Botet Escriba
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#ifndef BOOST_THREAD_LOCK_TYPES_HPP
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#define BOOST_THREAD_LOCK_TYPES_HPP
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#include <boost/thread/detail/config.hpp>
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#include <boost/thread/detail/move.hpp>
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#include <boost/thread/exceptions.hpp>
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#include <boost/thread/lock_options.hpp>
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#include <boost/thread/lockable_traits.hpp>
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#if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
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#include <boost/thread/is_locked_by_this_thread.hpp>
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#endif
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#include <boost/thread/thread_time.hpp>
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#include <boost/assert.hpp>
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#ifdef BOOST_THREAD_USES_CHRONO
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#include <boost/chrono/time_point.hpp>
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#include <boost/chrono/duration.hpp>
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#endif
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#include <boost/detail/workaround.hpp>
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#include <boost/config/abi_prefix.hpp>
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namespace boost
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{
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struct xtime;
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template <typename Mutex>
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class shared_lock;
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template <typename Mutex>
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class upgrade_lock;
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template <typename Mutex>
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class unique_lock;
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namespace detail
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{
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template <typename Mutex>
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class try_lock_wrapper;
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}
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#ifdef BOOST_THREAD_NO_AUTO_DETECT_MUTEX_TYPES
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namespace sync
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{
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template<typename T>
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struct is_basic_lockable<unique_lock<T> >
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{
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BOOST_STATIC_CONSTANT(bool, value = true);
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};
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template<typename T>
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struct is_lockable<unique_lock<T> >
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{
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BOOST_STATIC_CONSTANT(bool, value = true);
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};
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template<typename T>
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struct is_basic_lockable<shared_lock<T> >
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{
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BOOST_STATIC_CONSTANT(bool, value = true);
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};
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template<typename T>
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struct is_lockable<shared_lock<T> >
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{
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BOOST_STATIC_CONSTANT(bool, value = true);
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};
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template<typename T>
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struct is_basic_lockable<upgrade_lock<T> >
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{
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BOOST_STATIC_CONSTANT(bool, value = true);
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};
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template<typename T>
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struct is_lockable<upgrade_lock<T> >
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{
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BOOST_STATIC_CONSTANT(bool, value = true);
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};
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template<typename T>
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struct is_basic_lockable<detail::try_lock_wrapper<T> >
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{
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BOOST_STATIC_CONSTANT(bool, value = true);
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};
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template<typename T>
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struct is_lockable<detail::try_lock_wrapper<T> >
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{
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BOOST_STATIC_CONSTANT(bool, value = true);
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};
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}
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#endif
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template <typename Mutex>
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class unique_lock
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{
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private:
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Mutex* m;
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bool is_locked;
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private:
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explicit unique_lock(upgrade_lock<Mutex>&);
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unique_lock& operator=(upgrade_lock<Mutex>& other);
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public:
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typedef Mutex mutex_type;
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BOOST_THREAD_MOVABLE_ONLY( unique_lock)
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#if 0 // This should not be needed anymore. Use instead BOOST_THREAD_MAKE_RV_REF.
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#if BOOST_WORKAROUND(__SUNPRO_CC, < 0x5100)
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unique_lock(const volatile unique_lock&);
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#endif
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#endif
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unique_lock()BOOST_NOEXCEPT :
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m(0),is_locked(false)
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{}
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explicit unique_lock(Mutex& m_) :
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m(&m_), is_locked(false)
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{
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lock();
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}
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unique_lock(Mutex& m_, adopt_lock_t) :
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m(&m_), is_locked(true)
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{
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#if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
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BOOST_ASSERT(is_locked_by_this_thread(m));
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#endif
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}
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unique_lock(Mutex& m_, defer_lock_t)BOOST_NOEXCEPT:
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m(&m_),is_locked(false)
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{}
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unique_lock(Mutex& m_, try_to_lock_t) :
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m(&m_), is_locked(false)
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{
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try_lock();
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}
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#if defined BOOST_THREAD_USES_DATETIME
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template<typename TimeDuration>
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unique_lock(Mutex& m_,TimeDuration const& target_time):
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m(&m_),is_locked(false)
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{
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timed_lock(target_time);
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}
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unique_lock(Mutex& m_,system_time const& target_time):
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m(&m_),is_locked(false)
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{
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timed_lock(target_time);
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}
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#endif
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#ifdef BOOST_THREAD_USES_CHRONO
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template <class Clock, class Duration>
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unique_lock(Mutex& mtx, const chrono::time_point<Clock, Duration>& t)
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: m(&mtx), is_locked(mtx.try_lock_until(t))
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{
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}
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template <class Rep, class Period>
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unique_lock(Mutex& mtx, const chrono::duration<Rep, Period>& d)
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: m(&mtx), is_locked(mtx.try_lock_for(d))
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{
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}
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#endif
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unique_lock(BOOST_THREAD_RV_REF(unique_lock) other) BOOST_NOEXCEPT:
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m(BOOST_THREAD_RV(other).m),is_locked(BOOST_THREAD_RV(other).is_locked)
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{
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BOOST_THREAD_RV(other).is_locked=false;
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BOOST_THREAD_RV(other).m=0;
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}
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BOOST_THREAD_EXPLICIT_LOCK_CONVERSION unique_lock(BOOST_THREAD_RV_REF_BEG upgrade_lock<Mutex> BOOST_THREAD_RV_REF_END other);
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#ifndef BOOST_THREAD_PROVIDES_EXPLICIT_LOCK_CONVERSION
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//std-2104 unique_lock move-assignment should not be noexcept
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unique_lock& operator=(BOOST_THREAD_RV_REF_BEG upgrade_lock<Mutex> BOOST_THREAD_RV_REF_END other) //BOOST_NOEXCEPT
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{
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unique_lock temp(::boost::move(other));
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swap(temp);
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return *this;
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}
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#endif
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//std-2104 unique_lock move-assignment should not be noexcept
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unique_lock& operator=(BOOST_THREAD_RV_REF(unique_lock) other) //BOOST_NOEXCEPT
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{
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unique_lock temp(::boost::move(other));
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swap(temp);
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return *this;
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}
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#if 0 // This should not be needed anymore. Use instead BOOST_THREAD_MAKE_RV_REF.
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#if BOOST_WORKAROUND(__SUNPRO_CC, < 0x5100)
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unique_lock& operator=(unique_lock<Mutex> other)
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{
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swap(other);
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return *this;
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}
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#endif // BOOST_WORKAROUND
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#endif
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// Conversion from upgrade locking
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unique_lock(BOOST_THREAD_RV_REF_BEG upgrade_lock<mutex_type> BOOST_THREAD_RV_REF_END ul, try_to_lock_t)
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: m(0),is_locked(false)
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{
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if (BOOST_THREAD_RV(ul).owns_lock())
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{
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if (BOOST_THREAD_RV(ul).mutex()->try_unlock_upgrade_and_lock())
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{
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m = BOOST_THREAD_RV(ul).release();
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is_locked = true;
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}
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}
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else
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{
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m = BOOST_THREAD_RV(ul).release();
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}
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}
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#ifdef BOOST_THREAD_USES_CHRONO
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template <class Clock, class Duration>
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unique_lock(BOOST_THREAD_RV_REF_BEG upgrade_lock<mutex_type> BOOST_THREAD_RV_REF_END ul,
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const chrono::time_point<Clock, Duration>& abs_time)
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: m(0),is_locked(false)
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{
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if (BOOST_THREAD_RV(ul).owns_lock())
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{
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if (BOOST_THREAD_RV(ul).mutex()->try_unlock_upgrade_and_lock_until(abs_time))
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{
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m = BOOST_THREAD_RV(ul).release();
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is_locked = true;
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}
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}
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else
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{
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m = BOOST_THREAD_RV(ul).release();
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}
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}
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template <class Rep, class Period>
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unique_lock(BOOST_THREAD_RV_REF_BEG upgrade_lock<mutex_type> BOOST_THREAD_RV_REF_END ul,
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const chrono::duration<Rep, Period>& rel_time)
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: m(0),is_locked(false)
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{
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if (BOOST_THREAD_RV(ul).owns_lock())
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{
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if (BOOST_THREAD_RV(ul).mutex()->try_unlock_upgrade_and_lock_for(rel_time))
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{
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m = BOOST_THREAD_RV(ul).release();
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is_locked = true;
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}
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}
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else
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{
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m = BOOST_THREAD_RV(ul).release();
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}
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}
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#endif
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#ifdef BOOST_THREAD_PROVIDES_SHARED_MUTEX_UPWARDS_CONVERSIONS
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// Conversion from shared locking
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unique_lock(BOOST_THREAD_RV_REF_BEG shared_lock<mutex_type> BOOST_THREAD_RV_REF_END sl, try_to_lock_t)
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: m(0),is_locked(false)
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{
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if (BOOST_THREAD_RV(sl).owns_lock())
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{
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if (BOOST_THREAD_RV(sl).mutex()->try_unlock_shared_and_lock())
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{
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m = BOOST_THREAD_RV(sl).release();
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is_locked = true;
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}
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}
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else
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{
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m = BOOST_THREAD_RV(sl).release();
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}
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}
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#ifdef BOOST_THREAD_USES_CHRONO
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template <class Clock, class Duration>
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unique_lock(BOOST_THREAD_RV_REF_BEG shared_lock<mutex_type> BOOST_THREAD_RV_REF_END sl,
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const chrono::time_point<Clock, Duration>& abs_time)
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: m(0),is_locked(false)
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{
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if (BOOST_THREAD_RV(sl).owns_lock())
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{
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if (BOOST_THREAD_RV(sl).mutex()->try_unlock_shared_and_lock_until(abs_time))
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{
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m = BOOST_THREAD_RV(sl).release();
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is_locked = true;
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}
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}
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else
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{
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m = BOOST_THREAD_RV(sl).release();
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}
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}
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template <class Rep, class Period>
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unique_lock(BOOST_THREAD_RV_REF_BEG shared_lock<mutex_type> BOOST_THREAD_RV_REF_END sl,
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const chrono::duration<Rep, Period>& rel_time)
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: m(0),is_locked(false)
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{
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if (BOOST_THREAD_RV(sl).owns_lock())
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{
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if (BOOST_THREAD_RV(sl).mutex()->try_unlock_shared_and_lock_for(rel_time))
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{
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m = BOOST_THREAD_RV(sl).release();
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is_locked = true;
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}
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}
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else
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{
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m = BOOST_THREAD_RV(sl).release();
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}
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}
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#endif // BOOST_THREAD_USES_CHRONO
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#endif // BOOST_THREAD_PROVIDES_SHARED_MUTEX_UPWARDS_CONVERSIONS
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void swap(unique_lock& other)BOOST_NOEXCEPT
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{
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std::swap(m,other.m);
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std::swap(is_locked,other.is_locked);
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}
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~unique_lock()
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{
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if (owns_lock())
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{
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m->unlock();
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}
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}
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void lock()
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{
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if (m == 0)
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{
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boost::throw_exception(
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boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
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}
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if (owns_lock())
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{
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boost::throw_exception(
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boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
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}
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m->lock();
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is_locked = true;
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}
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bool try_lock()
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{
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if (m == 0)
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{
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boost::throw_exception(
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boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
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}
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if (owns_lock())
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{
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boost::throw_exception(
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boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
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}
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is_locked = m->try_lock();
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return is_locked;
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}
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#if defined BOOST_THREAD_USES_DATETIME
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template<typename TimeDuration>
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bool timed_lock(TimeDuration const& relative_time)
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{
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if(m==0)
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{
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boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
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}
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if(owns_lock())
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{
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boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
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}
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is_locked=m->timed_lock(relative_time);
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return is_locked;
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}
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bool timed_lock(::boost::system_time const& absolute_time)
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{
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if(m==0)
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{
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boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
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}
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if(owns_lock())
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{
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boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
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}
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is_locked=m->timed_lock(absolute_time);
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return is_locked;
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}
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bool timed_lock(::boost::xtime const& absolute_time)
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{
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if(m==0)
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{
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boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
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}
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if(owns_lock())
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{
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boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
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}
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is_locked=m->timed_lock(absolute_time);
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return is_locked;
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}
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#endif
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#ifdef BOOST_THREAD_USES_CHRONO
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template <class Rep, class Period>
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bool try_lock_for(const chrono::duration<Rep, Period>& rel_time)
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{
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if(m==0)
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{
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boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
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}
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if(owns_lock())
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{
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boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
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}
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is_locked=m->try_lock_for(rel_time);
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return is_locked;
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}
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template <class Clock, class Duration>
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bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time)
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{
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if(m==0)
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{
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boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
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}
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if(owns_lock())
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{
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boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
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}
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is_locked=m->try_lock_until(abs_time);
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return is_locked;
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}
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#endif
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void unlock()
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{
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if (m == 0)
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{
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boost::throw_exception(
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boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
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}
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if (!owns_lock())
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{
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boost::throw_exception(
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boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock doesn't own the mutex"));
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}
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m->unlock();
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is_locked = false;
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}
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#if defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
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typedef void (unique_lock::*bool_type)();
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operator bool_type() const BOOST_NOEXCEPT
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{
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return is_locked?&unique_lock::lock:0;
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}
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bool operator!() const BOOST_NOEXCEPT
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{
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return !owns_lock();
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}
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#else
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explicit operator bool() const BOOST_NOEXCEPT
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{
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return owns_lock();
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}
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#endif
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bool owns_lock() const BOOST_NOEXCEPT
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{
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return is_locked;
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}
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Mutex* mutex() const BOOST_NOEXCEPT
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{
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return m;
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}
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Mutex* release()BOOST_NOEXCEPT
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{
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Mutex* const res=m;
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m=0;
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is_locked=false;
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return res;
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}
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friend class shared_lock<Mutex> ;
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friend class upgrade_lock<Mutex> ;
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};
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template<typename Mutex>
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void swap(unique_lock<Mutex>& lhs, unique_lock<Mutex>& rhs)
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BOOST_NOEXCEPT
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{
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lhs.swap(rhs);
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}
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BOOST_THREAD_DCL_MOVABLE_BEG(Mutex) unique_lock<Mutex> BOOST_THREAD_DCL_MOVABLE_END
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template<typename Mutex>
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class shared_lock
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{
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protected:
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Mutex* m;
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bool is_locked;
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public:
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typedef Mutex mutex_type;
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BOOST_THREAD_MOVABLE_ONLY(shared_lock)
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shared_lock() BOOST_NOEXCEPT:
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m(0),is_locked(false)
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{}
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explicit shared_lock(Mutex& m_):
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m(&m_),is_locked(false)
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{
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lock();
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}
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shared_lock(Mutex& m_,adopt_lock_t):
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m(&m_),is_locked(true)
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{
|
|
#if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
|
|
BOOST_ASSERT(is_locked_by_this_thread(m));
|
|
#endif
|
|
}
|
|
shared_lock(Mutex& m_,defer_lock_t) BOOST_NOEXCEPT:
|
|
m(&m_),is_locked(false)
|
|
{}
|
|
shared_lock(Mutex& m_,try_to_lock_t):
|
|
m(&m_),is_locked(false)
|
|
{
|
|
try_lock();
|
|
}
|
|
#if defined BOOST_THREAD_USES_DATETIME
|
|
shared_lock(Mutex& m_,system_time const& target_time):
|
|
m(&m_),is_locked(false)
|
|
{
|
|
timed_lock(target_time);
|
|
}
|
|
#endif
|
|
#ifdef BOOST_THREAD_USES_CHRONO
|
|
template <class Clock, class Duration>
|
|
shared_lock(Mutex& mtx, const chrono::time_point<Clock, Duration>& t)
|
|
: m(&mtx), is_locked(mtx.try_lock_shared_until(t))
|
|
{
|
|
}
|
|
template <class Rep, class Period>
|
|
shared_lock(Mutex& mtx, const chrono::duration<Rep, Period>& d)
|
|
: m(&mtx), is_locked(mtx.try_lock_shared_for(d))
|
|
{
|
|
}
|
|
#endif
|
|
|
|
shared_lock(BOOST_THREAD_RV_REF_BEG shared_lock<Mutex> BOOST_THREAD_RV_REF_END other) BOOST_NOEXCEPT:
|
|
m(BOOST_THREAD_RV(other).m),is_locked(BOOST_THREAD_RV(other).is_locked)
|
|
{
|
|
BOOST_THREAD_RV(other).is_locked=false;
|
|
BOOST_THREAD_RV(other).m=0;
|
|
}
|
|
|
|
BOOST_THREAD_EXPLICIT_LOCK_CONVERSION shared_lock(BOOST_THREAD_RV_REF_BEG unique_lock<Mutex> BOOST_THREAD_RV_REF_END other):
|
|
m(BOOST_THREAD_RV(other).m),is_locked(BOOST_THREAD_RV(other).is_locked)
|
|
{
|
|
if(is_locked)
|
|
{
|
|
m->unlock_and_lock_shared();
|
|
}
|
|
BOOST_THREAD_RV(other).is_locked=false;
|
|
BOOST_THREAD_RV(other).m=0;
|
|
}
|
|
|
|
BOOST_THREAD_EXPLICIT_LOCK_CONVERSION shared_lock(BOOST_THREAD_RV_REF_BEG upgrade_lock<Mutex> BOOST_THREAD_RV_REF_END other):
|
|
m(BOOST_THREAD_RV(other).m),is_locked(BOOST_THREAD_RV(other).is_locked)
|
|
{
|
|
if(is_locked)
|
|
{
|
|
m->unlock_upgrade_and_lock_shared();
|
|
}
|
|
BOOST_THREAD_RV(other).is_locked=false;
|
|
BOOST_THREAD_RV(other).m=0;
|
|
}
|
|
|
|
//std-2104 unique_lock move-assignment should not be noexcept
|
|
shared_lock& operator=(BOOST_THREAD_RV_REF_BEG shared_lock<Mutex> BOOST_THREAD_RV_REF_END other) //BOOST_NOEXCEPT
|
|
{
|
|
shared_lock temp(::boost::move(other));
|
|
swap(temp);
|
|
return *this;
|
|
}
|
|
#ifndef BOOST_THREAD_PROVIDES_EXPLICIT_LOCK_CONVERSION
|
|
shared_lock& operator=(BOOST_THREAD_RV_REF_BEG unique_lock<Mutex> BOOST_THREAD_RV_REF_END other)
|
|
{
|
|
shared_lock temp(::boost::move(other));
|
|
swap(temp);
|
|
return *this;
|
|
}
|
|
|
|
shared_lock& operator=(BOOST_THREAD_RV_REF_BEG upgrade_lock<Mutex> BOOST_THREAD_RV_REF_END other)
|
|
{
|
|
shared_lock temp(::boost::move(other));
|
|
swap(temp);
|
|
return *this;
|
|
}
|
|
#endif
|
|
|
|
void swap(shared_lock& other) BOOST_NOEXCEPT
|
|
{
|
|
std::swap(m,other.m);
|
|
std::swap(is_locked,other.is_locked);
|
|
}
|
|
|
|
Mutex* mutex() const BOOST_NOEXCEPT
|
|
{
|
|
return m;
|
|
}
|
|
|
|
Mutex* release() BOOST_NOEXCEPT
|
|
{
|
|
Mutex* const res=m;
|
|
m=0;
|
|
is_locked=false;
|
|
return res;
|
|
}
|
|
|
|
~shared_lock()
|
|
{
|
|
if(owns_lock())
|
|
{
|
|
m->unlock_shared();
|
|
}
|
|
}
|
|
void lock()
|
|
{
|
|
if(m==0)
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost shared_lock has no mutex"));
|
|
}
|
|
if(owns_lock())
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost shared_lock owns already the mutex"));
|
|
}
|
|
m->lock_shared();
|
|
is_locked=true;
|
|
}
|
|
bool try_lock()
|
|
{
|
|
if(m==0)
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost shared_lock has no mutex"));
|
|
}
|
|
if(owns_lock())
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost shared_lock owns already the mutex"));
|
|
}
|
|
is_locked=m->try_lock_shared();
|
|
return is_locked;
|
|
}
|
|
#if defined BOOST_THREAD_USES_DATETIME
|
|
bool timed_lock(boost::system_time const& target_time)
|
|
{
|
|
if(m==0)
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost shared_lock has no mutex"));
|
|
}
|
|
if(owns_lock())
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost shared_lock owns already the mutex"));
|
|
}
|
|
is_locked=m->timed_lock_shared(target_time);
|
|
return is_locked;
|
|
}
|
|
template<typename Duration>
|
|
bool timed_lock(Duration const& target_time)
|
|
{
|
|
if(m==0)
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost shared_lock has no mutex"));
|
|
}
|
|
if(owns_lock())
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost shared_lock owns already the mutex"));
|
|
}
|
|
is_locked=m->timed_lock_shared(target_time);
|
|
return is_locked;
|
|
}
|
|
#endif
|
|
#ifdef BOOST_THREAD_USES_CHRONO
|
|
template <class Rep, class Period>
|
|
bool try_lock_for(const chrono::duration<Rep, Period>& rel_time)
|
|
{
|
|
if(m==0)
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost shared_lock has no mutex"));
|
|
}
|
|
if(owns_lock())
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost shared_lock owns already the mutex"));
|
|
}
|
|
is_locked=m->try_lock_shared_for(rel_time);
|
|
return is_locked;
|
|
}
|
|
template <class Clock, class Duration>
|
|
bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time)
|
|
{
|
|
if(m==0)
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost shared_lock has no mutex"));
|
|
}
|
|
if(owns_lock())
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost shared_lock owns already the mutex"));
|
|
}
|
|
is_locked=m->try_lock_shared_until(abs_time);
|
|
return is_locked;
|
|
}
|
|
#endif
|
|
void unlock()
|
|
{
|
|
if(m==0)
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost shared_lock has no mutex"));
|
|
}
|
|
if(!owns_lock())
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost shared_lock doesn't own the mutex"));
|
|
}
|
|
m->unlock_shared();
|
|
is_locked=false;
|
|
}
|
|
|
|
#if defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
|
|
typedef void (shared_lock<Mutex>::*bool_type)();
|
|
operator bool_type() const BOOST_NOEXCEPT
|
|
{
|
|
return is_locked?&shared_lock::lock:0;
|
|
}
|
|
bool operator!() const BOOST_NOEXCEPT
|
|
{
|
|
return !owns_lock();
|
|
}
|
|
#else
|
|
explicit operator bool() const BOOST_NOEXCEPT
|
|
{
|
|
return owns_lock();
|
|
}
|
|
#endif
|
|
bool owns_lock() const BOOST_NOEXCEPT
|
|
{
|
|
return is_locked;
|
|
}
|
|
|
|
};
|
|
|
|
BOOST_THREAD_DCL_MOVABLE_BEG(Mutex) shared_lock<Mutex> BOOST_THREAD_DCL_MOVABLE_END
|
|
|
|
template<typename Mutex>
|
|
void swap(shared_lock<Mutex>& lhs,shared_lock<Mutex>& rhs) BOOST_NOEXCEPT
|
|
{
|
|
lhs.swap(rhs);
|
|
}
|
|
|
|
template <typename Mutex>
|
|
class upgrade_lock
|
|
{
|
|
protected:
|
|
Mutex* m;
|
|
bool is_locked;
|
|
|
|
public:
|
|
typedef Mutex mutex_type;
|
|
BOOST_THREAD_MOVABLE_ONLY( upgrade_lock)
|
|
|
|
upgrade_lock()BOOST_NOEXCEPT:
|
|
m(0),is_locked(false)
|
|
{}
|
|
|
|
explicit upgrade_lock(Mutex& m_) :
|
|
m(&m_), is_locked(false)
|
|
{
|
|
lock();
|
|
}
|
|
upgrade_lock(Mutex& m_, adopt_lock_t) :
|
|
m(&m_), is_locked(true)
|
|
{
|
|
#if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
|
|
BOOST_ASSERT(is_locked_by_this_thread(m));
|
|
#endif
|
|
}
|
|
upgrade_lock(Mutex& m_, defer_lock_t)BOOST_NOEXCEPT:
|
|
m(&m_),is_locked(false)
|
|
{}
|
|
upgrade_lock(Mutex& m_, try_to_lock_t) :
|
|
m(&m_), is_locked(false)
|
|
{
|
|
try_lock();
|
|
}
|
|
|
|
#ifdef BOOST_THREAD_USES_CHRONO
|
|
template <class Clock, class Duration>
|
|
upgrade_lock(Mutex& mtx, const chrono::time_point<Clock, Duration>& t)
|
|
: m(&mtx), is_locked(mtx.try_lock_upgrade_until(t))
|
|
{
|
|
}
|
|
template <class Rep, class Period>
|
|
upgrade_lock(Mutex& mtx, const chrono::duration<Rep, Period>& d)
|
|
: m(&mtx), is_locked(mtx.try_lock_upgrade_for(d))
|
|
{
|
|
}
|
|
#endif
|
|
|
|
upgrade_lock(BOOST_THREAD_RV_REF_BEG upgrade_lock<Mutex> BOOST_THREAD_RV_REF_END other) BOOST_NOEXCEPT:
|
|
m(BOOST_THREAD_RV(other).m),is_locked(BOOST_THREAD_RV(other).is_locked)
|
|
{
|
|
BOOST_THREAD_RV(other).is_locked=false;
|
|
BOOST_THREAD_RV(other).m=0;
|
|
}
|
|
|
|
BOOST_THREAD_EXPLICIT_LOCK_CONVERSION upgrade_lock(BOOST_THREAD_RV_REF_BEG unique_lock<Mutex> BOOST_THREAD_RV_REF_END other):
|
|
m(BOOST_THREAD_RV(other).m),is_locked(BOOST_THREAD_RV(other).is_locked)
|
|
{
|
|
if(is_locked)
|
|
{
|
|
m->unlock_and_lock_upgrade();
|
|
}
|
|
BOOST_THREAD_RV(other).is_locked=false;
|
|
BOOST_THREAD_RV(other).m=0;
|
|
}
|
|
|
|
//std-2104 unique_lock move-assignment should not be noexcept
|
|
upgrade_lock& operator=(BOOST_THREAD_RV_REF_BEG upgrade_lock<Mutex> BOOST_THREAD_RV_REF_END other) //BOOST_NOEXCEPT
|
|
{
|
|
upgrade_lock temp(::boost::move(other));
|
|
swap(temp);
|
|
return *this;
|
|
}
|
|
|
|
#ifndef BOOST_THREAD_PROVIDES_EXPLICIT_LOCK_CONVERSION
|
|
upgrade_lock& operator=(BOOST_THREAD_RV_REF_BEG unique_lock<Mutex> BOOST_THREAD_RV_REF_END other)
|
|
{
|
|
upgrade_lock temp(::boost::move(other));
|
|
swap(temp);
|
|
return *this;
|
|
}
|
|
#endif
|
|
|
|
#ifdef BOOST_THREAD_PROVIDES_SHARED_MUTEX_UPWARDS_CONVERSIONS
|
|
// Conversion from shared locking
|
|
upgrade_lock(BOOST_THREAD_RV_REF_BEG shared_lock<mutex_type> BOOST_THREAD_RV_REF_END sl, try_to_lock_t)
|
|
: m(0),is_locked(false)
|
|
{
|
|
if (BOOST_THREAD_RV(sl).owns_lock())
|
|
{
|
|
if (BOOST_THREAD_RV(sl).mutex()->try_unlock_shared_and_lock_upgrade())
|
|
{
|
|
m = BOOST_THREAD_RV(sl).release();
|
|
is_locked = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
m = BOOST_THREAD_RV(sl).release();
|
|
}
|
|
}
|
|
|
|
#ifdef BOOST_THREAD_USES_CHRONO
|
|
template <class Clock, class Duration>
|
|
upgrade_lock(BOOST_THREAD_RV_REF_BEG shared_lock<mutex_type> BOOST_THREAD_RV_REF_END sl,
|
|
const chrono::time_point<Clock, Duration>& abs_time)
|
|
: m(0),is_locked(false)
|
|
{
|
|
if (BOOST_THREAD_RV(sl).owns_lock())
|
|
{
|
|
if (BOOST_THREAD_RV(sl).mutex()->try_unlock_shared_and_lock_upgrade_until(abs_time))
|
|
{
|
|
m = BOOST_THREAD_RV(sl).release();
|
|
is_locked = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
m = BOOST_THREAD_RV(sl).release();
|
|
}
|
|
}
|
|
|
|
template <class Rep, class Period>
|
|
upgrade_lock(BOOST_THREAD_RV_REF_BEG shared_lock<mutex_type> BOOST_THREAD_RV_REF_END sl,
|
|
const chrono::duration<Rep, Period>& rel_time)
|
|
: m(0),is_locked(false)
|
|
{
|
|
if (BOOST_THREAD_RV(sl).owns_lock())
|
|
{
|
|
if (BOOST_THREAD_RV(sl).mutex()->try_unlock_shared_and_lock_upgrade_for(rel_time))
|
|
{
|
|
m = BOOST_THREAD_RV(sl).release();
|
|
is_locked = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
m = BOOST_THREAD_RV(sl).release();
|
|
}
|
|
}
|
|
#endif // BOOST_THREAD_USES_CHRONO
|
|
#endif // BOOST_THREAD_PROVIDES_SHARED_MUTEX_UPWARDS_CONVERSIONS
|
|
void swap(upgrade_lock& other)BOOST_NOEXCEPT
|
|
{
|
|
std::swap(m,other.m);
|
|
std::swap(is_locked,other.is_locked);
|
|
}
|
|
Mutex* mutex() const BOOST_NOEXCEPT
|
|
{
|
|
return m;
|
|
}
|
|
|
|
Mutex* release()BOOST_NOEXCEPT
|
|
{
|
|
Mutex* const res=m;
|
|
m=0;
|
|
is_locked=false;
|
|
return res;
|
|
}
|
|
~upgrade_lock()
|
|
{
|
|
if (owns_lock())
|
|
{
|
|
m->unlock_upgrade();
|
|
}
|
|
}
|
|
void lock()
|
|
{
|
|
if (m == 0)
|
|
{
|
|
boost::throw_exception(
|
|
boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost upgrade_lock has no mutex"));
|
|
}
|
|
if (owns_lock())
|
|
{
|
|
boost::throw_exception(
|
|
boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost upgrade_lock owns already the mutex"));
|
|
}
|
|
m->lock_upgrade();
|
|
is_locked = true;
|
|
}
|
|
bool try_lock()
|
|
{
|
|
if (m == 0)
|
|
{
|
|
boost::throw_exception(
|
|
boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost upgrade_lock has no mutex"));
|
|
}
|
|
if (owns_lock())
|
|
{
|
|
boost::throw_exception(
|
|
boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost upgrade_lock owns already the mutex"));
|
|
}
|
|
is_locked = m->try_lock_upgrade();
|
|
return is_locked;
|
|
}
|
|
void unlock()
|
|
{
|
|
if (m == 0)
|
|
{
|
|
boost::throw_exception(
|
|
boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost upgrade_lock has no mutex"));
|
|
}
|
|
if (!owns_lock())
|
|
{
|
|
boost::throw_exception(
|
|
boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost upgrade_lock doesn't own the mutex"));
|
|
}
|
|
m->unlock_upgrade();
|
|
is_locked = false;
|
|
}
|
|
#ifdef BOOST_THREAD_USES_CHRONO
|
|
template <class Rep, class Period>
|
|
bool try_lock_for(const chrono::duration<Rep, Period>& rel_time)
|
|
{
|
|
if(m==0)
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost upgrade_lock has no mutex"));
|
|
}
|
|
if(owns_lock())
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost upgrade_lock owns already the mutex"));
|
|
}
|
|
is_locked=m->try_lock_upgrade_for(rel_time);
|
|
return is_locked;
|
|
}
|
|
template <class Clock, class Duration>
|
|
bool try_lock_until(const chrono::time_point<Clock, Duration>& abs_time)
|
|
{
|
|
if(m==0)
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost upgrade_lock has no mutex"));
|
|
}
|
|
if(owns_lock())
|
|
{
|
|
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost upgrade_lock owns already the mutex"));
|
|
}
|
|
is_locked=m->try_lock_upgrade_until(abs_time);
|
|
return is_locked;
|
|
}
|
|
#endif
|
|
#if defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
|
|
typedef void (upgrade_lock::*bool_type)();
|
|
operator bool_type() const BOOST_NOEXCEPT
|
|
{
|
|
return is_locked?&upgrade_lock::lock:0;
|
|
}
|
|
bool operator!() const BOOST_NOEXCEPT
|
|
{
|
|
return !owns_lock();
|
|
}
|
|
#else
|
|
explicit operator bool() const BOOST_NOEXCEPT
|
|
{
|
|
return owns_lock();
|
|
}
|
|
#endif
|
|
bool owns_lock() const BOOST_NOEXCEPT
|
|
{
|
|
return is_locked;
|
|
}
|
|
friend class shared_lock<Mutex> ;
|
|
friend class unique_lock<Mutex> ;
|
|
};
|
|
|
|
template<typename Mutex>
|
|
void swap(upgrade_lock<Mutex>& lhs, upgrade_lock<Mutex>& rhs)
|
|
BOOST_NOEXCEPT
|
|
{
|
|
lhs.swap(rhs);
|
|
}
|
|
|
|
BOOST_THREAD_DCL_MOVABLE_BEG(Mutex) upgrade_lock<Mutex> BOOST_THREAD_DCL_MOVABLE_END
|
|
|
|
template<typename Mutex>
|
|
unique_lock<Mutex>::unique_lock(BOOST_THREAD_RV_REF_BEG upgrade_lock<Mutex> BOOST_THREAD_RV_REF_END other):
|
|
m(BOOST_THREAD_RV(other).m),is_locked(BOOST_THREAD_RV(other).is_locked)
|
|
{
|
|
if(is_locked)
|
|
{
|
|
m->unlock_upgrade_and_lock();
|
|
}
|
|
BOOST_THREAD_RV(other).release();
|
|
}
|
|
|
|
template <class Mutex>
|
|
class upgrade_to_unique_lock
|
|
{
|
|
private:
|
|
upgrade_lock<Mutex>* source;
|
|
unique_lock<Mutex> exclusive;
|
|
|
|
public:
|
|
typedef Mutex mutex_type;
|
|
BOOST_THREAD_MOVABLE_ONLY( upgrade_to_unique_lock)
|
|
|
|
explicit upgrade_to_unique_lock(upgrade_lock<Mutex>& m_) :
|
|
source(&m_), exclusive(::boost::move(*source))
|
|
{
|
|
}
|
|
~upgrade_to_unique_lock()
|
|
{
|
|
if (source)
|
|
{
|
|
*source = BOOST_THREAD_MAKE_RV_REF(upgrade_lock<Mutex> (::boost::move(exclusive)));
|
|
}
|
|
}
|
|
|
|
upgrade_to_unique_lock(BOOST_THREAD_RV_REF_BEG upgrade_to_unique_lock<Mutex> BOOST_THREAD_RV_REF_END other) BOOST_NOEXCEPT:
|
|
source(BOOST_THREAD_RV(other).source),exclusive(::boost::move(BOOST_THREAD_RV(other).exclusive))
|
|
{
|
|
BOOST_THREAD_RV(other).source=0;
|
|
}
|
|
|
|
//std-2104 unique_lock move-assignment should not be noexcept
|
|
upgrade_to_unique_lock& operator=(BOOST_THREAD_RV_REF_BEG upgrade_to_unique_lock<Mutex> BOOST_THREAD_RV_REF_END other) //BOOST_NOEXCEPT
|
|
{
|
|
upgrade_to_unique_lock temp(::boost::move(other));
|
|
swap(temp);
|
|
return *this;
|
|
}
|
|
|
|
void swap(upgrade_to_unique_lock& other)BOOST_NOEXCEPT
|
|
{
|
|
std::swap(source,other.source);
|
|
exclusive.swap(other.exclusive);
|
|
}
|
|
|
|
#if defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
|
|
typedef void (upgrade_to_unique_lock::*bool_type)(upgrade_to_unique_lock&);
|
|
operator bool_type() const BOOST_NOEXCEPT
|
|
{
|
|
return exclusive.owns_lock()?&upgrade_to_unique_lock::swap:0;
|
|
}
|
|
bool operator!() const BOOST_NOEXCEPT
|
|
{
|
|
return !owns_lock();
|
|
}
|
|
#else
|
|
explicit operator bool() const BOOST_NOEXCEPT
|
|
{
|
|
return owns_lock();
|
|
}
|
|
#endif
|
|
|
|
bool owns_lock() const BOOST_NOEXCEPT
|
|
{
|
|
return exclusive.owns_lock();
|
|
}
|
|
Mutex* mutex() const BOOST_NOEXCEPT
|
|
{
|
|
return exclusive.mutex();
|
|
}
|
|
};
|
|
|
|
BOOST_THREAD_DCL_MOVABLE_BEG(Mutex) upgrade_to_unique_lock<Mutex> BOOST_THREAD_DCL_MOVABLE_END
|
|
|
|
namespace detail
|
|
{
|
|
template<typename Mutex>
|
|
class try_lock_wrapper:
|
|
private unique_lock<Mutex>
|
|
{
|
|
typedef unique_lock<Mutex> base;
|
|
public:
|
|
BOOST_THREAD_MOVABLE_ONLY(try_lock_wrapper)
|
|
|
|
try_lock_wrapper()
|
|
{}
|
|
|
|
explicit try_lock_wrapper(Mutex& m):
|
|
base(m,try_to_lock)
|
|
{}
|
|
|
|
try_lock_wrapper(Mutex& m_,adopt_lock_t):
|
|
base(m_,adopt_lock)
|
|
{
|
|
#if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
|
|
BOOST_ASSERT(is_locked_by_this_thread(m_));
|
|
#endif
|
|
}
|
|
try_lock_wrapper(Mutex& m_,defer_lock_t):
|
|
base(m_,defer_lock)
|
|
{}
|
|
try_lock_wrapper(Mutex& m_,try_to_lock_t):
|
|
base(m_,try_to_lock)
|
|
{}
|
|
#ifndef BOOST_NO_CXX11_RVALUE_REFERENCES
|
|
try_lock_wrapper(BOOST_THREAD_RV_REF(try_lock_wrapper) other):
|
|
base(::boost::move(other))
|
|
{}
|
|
|
|
#elif defined BOOST_THREAD_USES_MOVE
|
|
try_lock_wrapper(BOOST_THREAD_RV_REF(try_lock_wrapper) other):
|
|
base(::boost::move(static_cast<base&>(other)))
|
|
{}
|
|
|
|
#else
|
|
try_lock_wrapper(BOOST_THREAD_RV_REF(try_lock_wrapper) other):
|
|
base(BOOST_THREAD_RV_REF(base)(*other))
|
|
{}
|
|
#endif
|
|
try_lock_wrapper& operator=(BOOST_THREAD_RV_REF_BEG try_lock_wrapper<Mutex> BOOST_THREAD_RV_REF_END other)
|
|
{
|
|
try_lock_wrapper temp(::boost::move(other));
|
|
swap(temp);
|
|
return *this;
|
|
}
|
|
void swap(try_lock_wrapper& other)
|
|
{
|
|
base::swap(other);
|
|
}
|
|
void lock()
|
|
{
|
|
base::lock();
|
|
}
|
|
bool try_lock()
|
|
{
|
|
return base::try_lock();
|
|
}
|
|
void unlock()
|
|
{
|
|
base::unlock();
|
|
}
|
|
bool owns_lock() const
|
|
{
|
|
return base::owns_lock();
|
|
}
|
|
Mutex* mutex() const BOOST_NOEXCEPT
|
|
{
|
|
return base::mutex();
|
|
}
|
|
Mutex* release()
|
|
{
|
|
return base::release();
|
|
}
|
|
|
|
#if defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
|
|
typedef typename base::bool_type bool_type;
|
|
operator bool_type() const
|
|
{
|
|
return base::operator bool_type();
|
|
}
|
|
bool operator!() const
|
|
{
|
|
return !this->owns_lock();
|
|
}
|
|
#else
|
|
explicit operator bool() const
|
|
{
|
|
return owns_lock();
|
|
}
|
|
#endif
|
|
};
|
|
|
|
template<typename Mutex>
|
|
void swap(try_lock_wrapper<Mutex>& lhs,try_lock_wrapper<Mutex>& rhs)
|
|
{
|
|
lhs.swap(rhs);
|
|
}
|
|
}
|
|
}
|
|
#include <boost/config/abi_suffix.hpp>
|
|
|
|
#endif
|