boost/thread/lock_types.hpp
// 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)
// (C) Copyright 2007 Anthony Williams
// (C) Copyright 2011-2012 Vicente J. Botet Escriba
#ifndef BOOST_THREAD_LOCK_TYPES_HPP
#define BOOST_THREAD_LOCK_TYPES_HPP
#include <boost/thread/detail/config.hpp>
#include <boost/thread/detail/move.hpp>
#include <boost/thread/exceptions.hpp>
#include <boost/thread/lock_options.hpp>
#include <boost/thread/lockable_traits.hpp>
#if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
#include <boost/thread/is_locked_by_this_thread.hpp>
#endif
#include <boost/thread/thread_time.hpp>
#include <boost/assert.hpp>
#ifdef BOOST_THREAD_USES_CHRONO
#include <boost/chrono/time_point.hpp>
#include <boost/chrono/duration.hpp>
#endif
#include <boost/detail/workaround.hpp>
#include <boost/config/abi_prefix.hpp>
namespace boost
{
struct xtime;
template <typename Mutex>
class shared_lock;
template <typename Mutex>
class upgrade_lock;
template <typename Mutex>
class unique_lock;
namespace detail
{
template <typename Mutex>
class try_lock_wrapper;
}
#ifdef BOOST_THREAD_NO_AUTO_DETECT_MUTEX_TYPES
namespace sync
{
template<typename T>
struct is_basic_lockable<unique_lock<T> >
{
BOOST_STATIC_CONSTANT(bool, value = true);
};
template<typename T>
struct is_lockable<unique_lock<T> >
{
BOOST_STATIC_CONSTANT(bool, value = true);
};
template<typename T>
struct is_basic_lockable<shared_lock<T> >
{
BOOST_STATIC_CONSTANT(bool, value = true);
};
template<typename T>
struct is_lockable<shared_lock<T> >
{
BOOST_STATIC_CONSTANT(bool, value = true);
};
template<typename T>
struct is_basic_lockable<upgrade_lock<T> >
{
BOOST_STATIC_CONSTANT(bool, value = true);
};
template<typename T>
struct is_lockable<upgrade_lock<T> >
{
BOOST_STATIC_CONSTANT(bool, value = true);
};
template<typename T>
struct is_basic_lockable<detail::try_lock_wrapper<T> >
{
BOOST_STATIC_CONSTANT(bool, value = true);
};
template<typename T>
struct is_lockable<detail::try_lock_wrapper<T> >
{
BOOST_STATIC_CONSTANT(bool, value = true);
};
}
#endif
template <typename Mutex>
class unique_lock
{
private:
Mutex* m;
bool is_locked;
private:
explicit unique_lock(upgrade_lock<Mutex>&);
unique_lock& operator=(upgrade_lock<Mutex>& other);
public:
typedef Mutex mutex_type;
BOOST_THREAD_MOVABLE_ONLY( unique_lock)
#if 0 // This should not be needed anymore. Use instead BOOST_THREAD_MAKE_RV_REF.
#if BOOST_WORKAROUND(__SUNPRO_CC, < 0x5100)
unique_lock(const volatile unique_lock&);
#endif
#endif
unique_lock()BOOST_NOEXCEPT :
m(0),is_locked(false)
{}
explicit unique_lock(Mutex& m_) :
m(&m_), is_locked(false)
{
lock();
}
unique_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
}
unique_lock(Mutex& m_, defer_lock_t)BOOST_NOEXCEPT:
m(&m_),is_locked(false)
{}
unique_lock(Mutex& m_, try_to_lock_t) :
m(&m_), is_locked(false)
{
try_lock();
}
#if defined BOOST_THREAD_USES_DATETIME
template<typename TimeDuration>
unique_lock(Mutex& m_,TimeDuration const& target_time):
m(&m_),is_locked(false)
{
timed_lock(target_time);
}
unique_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>
unique_lock(Mutex& mtx, const chrono::time_point<Clock, Duration>& t)
: m(&mtx), is_locked(mtx.try_lock_until(t))
{
}
template <class Rep, class Period>
unique_lock(Mutex& mtx, const chrono::duration<Rep, Period>& d)
: m(&mtx), is_locked(mtx.try_lock_for(d))
{
}
#endif
unique_lock(BOOST_THREAD_RV_REF(unique_lock) 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 unique_lock(BOOST_THREAD_RV_REF_BEG upgrade_lock<Mutex> BOOST_THREAD_RV_REF_END other);
#ifndef BOOST_THREAD_PROVIDES_EXPLICIT_LOCK_CONVERSION
//std-2104 unique_lock move-assignment should not be noexcept
unique_lock& operator=(BOOST_THREAD_RV_REF_BEG upgrade_lock<Mutex> BOOST_THREAD_RV_REF_END other) //BOOST_NOEXCEPT
{
unique_lock temp(::boost::move(other));
swap(temp);
return *this;
}
#endif
//std-2104 unique_lock move-assignment should not be noexcept
unique_lock& operator=(BOOST_THREAD_RV_REF(unique_lock) other) //BOOST_NOEXCEPT
{
unique_lock temp(::boost::move(other));
swap(temp);
return *this;
}
#if 0 // This should not be needed anymore. Use instead BOOST_THREAD_MAKE_RV_REF.
#if BOOST_WORKAROUND(__SUNPRO_CC, < 0x5100)
unique_lock& operator=(unique_lock<Mutex> other)
{
swap(other);
return *this;
}
#endif // BOOST_WORKAROUND
#endif
// Conversion from upgrade locking
unique_lock(BOOST_THREAD_RV_REF_BEG upgrade_lock<mutex_type> BOOST_THREAD_RV_REF_END ul, try_to_lock_t)
: m(0),is_locked(false)
{
if (BOOST_THREAD_RV(ul).owns_lock())
{
if (BOOST_THREAD_RV(ul).mutex()->try_unlock_upgrade_and_lock())
{
m = BOOST_THREAD_RV(ul).release();
is_locked = true;
}
}
else
{
m = BOOST_THREAD_RV(ul).release();
}
}
#ifdef BOOST_THREAD_USES_CHRONO
template <class Clock, class Duration>
unique_lock(BOOST_THREAD_RV_REF_BEG upgrade_lock<mutex_type> BOOST_THREAD_RV_REF_END ul,
const chrono::time_point<Clock, Duration>& abs_time)
: m(0),is_locked(false)
{
if (BOOST_THREAD_RV(ul).owns_lock())
{
if (BOOST_THREAD_RV(ul).mutex()->try_unlock_upgrade_and_lock_until(abs_time))
{
m = BOOST_THREAD_RV(ul).release();
is_locked = true;
}
}
else
{
m = BOOST_THREAD_RV(ul).release();
}
}
template <class Rep, class Period>
unique_lock(BOOST_THREAD_RV_REF_BEG upgrade_lock<mutex_type> BOOST_THREAD_RV_REF_END ul,
const chrono::duration<Rep, Period>& rel_time)
: m(0),is_locked(false)
{
if (BOOST_THREAD_RV(ul).owns_lock())
{
if (BOOST_THREAD_RV(ul).mutex()->try_unlock_upgrade_and_lock_for(rel_time))
{
m = BOOST_THREAD_RV(ul).release();
is_locked = true;
}
}
else
{
m = BOOST_THREAD_RV(ul).release();
}
}
#endif
#ifdef BOOST_THREAD_PROVIDES_SHARED_MUTEX_UPWARDS_CONVERSIONS
// Conversion from shared locking
unique_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())
{
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>
unique_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_until(abs_time))
{
m = BOOST_THREAD_RV(sl).release();
is_locked = true;
}
}
else
{
m = BOOST_THREAD_RV(sl).release();
}
}
template <class Rep, class Period>
unique_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_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(unique_lock& other)BOOST_NOEXCEPT
{
std::swap(m,other.m);
std::swap(is_locked,other.is_locked);
}
~unique_lock()
{
if (owns_lock())
{
m->unlock();
}
}
void lock()
{
if (m == 0)
{
boost::throw_exception(
boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
}
if (owns_lock())
{
boost::throw_exception(
boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
}
m->lock();
is_locked = true;
}
bool try_lock()
{
if (m == 0)
{
boost::throw_exception(
boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
}
if (owns_lock())
{
boost::throw_exception(
boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
}
is_locked = m->try_lock();
return is_locked;
}
#if defined BOOST_THREAD_USES_DATETIME
template<typename TimeDuration>
bool timed_lock(TimeDuration const& relative_time)
{
if(m==0)
{
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
}
if(owns_lock())
{
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
}
is_locked=m->timed_lock(relative_time);
return is_locked;
}
bool timed_lock(::boost::system_time const& absolute_time)
{
if(m==0)
{
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
}
if(owns_lock())
{
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
}
is_locked=m->timed_lock(absolute_time);
return is_locked;
}
bool timed_lock(::boost::xtime const& absolute_time)
{
if(m==0)
{
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock has no mutex"));
}
if(owns_lock())
{
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
}
is_locked=m->timed_lock(absolute_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 unique_lock has no mutex"));
}
if(owns_lock())
{
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
}
is_locked=m->try_lock_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 unique_lock has no mutex"));
}
if(owns_lock())
{
boost::throw_exception(boost::lock_error(static_cast<int>(system::errc::resource_deadlock_would_occur), "boost unique_lock owns already the mutex"));
}
is_locked=m->try_lock_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 unique_lock has no mutex"));
}
if (!owns_lock())
{
boost::throw_exception(
boost::lock_error(static_cast<int>(system::errc::operation_not_permitted), "boost unique_lock doesn't own the mutex"));
}
m->unlock();
is_locked = false;
}
#if defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
typedef void (unique_lock::*bool_type)();
operator bool_type() const BOOST_NOEXCEPT
{
return is_locked?&unique_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;
}
Mutex* mutex() const BOOST_NOEXCEPT
{
return m;
}
Mutex* release()BOOST_NOEXCEPT
{
Mutex* const res=m;
m=0;
is_locked=false;
return res;
}
friend class shared_lock<Mutex> ;
friend class upgrade_lock<Mutex> ;
};
template<typename Mutex>
void swap(unique_lock<Mutex>& lhs, unique_lock<Mutex>& rhs)
BOOST_NOEXCEPT
{
lhs.swap(rhs);
}
BOOST_THREAD_DCL_MOVABLE_BEG(Mutex) unique_lock<Mutex> BOOST_THREAD_DCL_MOVABLE_END
template<typename Mutex>
class shared_lock
{
protected:
Mutex* m;
bool is_locked;
public:
typedef Mutex mutex_type;
BOOST_THREAD_MOVABLE_ONLY(shared_lock)
shared_lock() BOOST_NOEXCEPT:
m(0),is_locked(false)
{}
explicit shared_lock(Mutex& m_):
m(&m_),is_locked(false)
{
lock();
}
shared_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
}
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