+++ /dev/null
-// (C) Copyright 2010 Just Software Solutions Ltd http://www.justsoftwaresolutions.co.uk
-// (C) Copyright 2012 Vicente J. Botet Escriba
-// 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)
-
-
-#ifndef BOOST_THREAD_SYNCHRONIZED_VALUE_HPP
-#define BOOST_THREAD_SYNCHRONIZED_VALUE_HPP
-
-#include <boost/thread/detail/config.hpp>
-
-#include <boost/thread/detail/move.hpp>
-#include <boost/thread/mutex.hpp>
-#include <boost/thread/lock_types.hpp>
-#include <boost/thread/lock_guard.hpp>
-#include <boost/thread/lock_algorithms.hpp>
-#include <boost/thread/lock_factories.hpp>
-#include <boost/thread/strict_lock.hpp>
-#include <boost/core/swap.hpp>
-#include <boost/utility/declval.hpp>
-//#include <boost/type_traits.hpp>
-//#include <boost/thread/detail/is_nothrow_default_constructible.hpp>
-//#if ! defined BOOST_NO_CXX11_HDR_TYPE_TRAITS
-//#include <type_traits>
-//#endif
-
-#if ! defined(BOOST_THREAD_NO_SYNCHRONIZE)
-#include <tuple> // todo change to <boost/tuple.hpp> once Boost.Tuple or Boost.Fusion provides Move semantics on C++98 compilers.
-#include <functional>
-#endif
-
-#include <boost/utility/result_of.hpp>
-
-#include <boost/config/abi_prefix.hpp>
-
-namespace boost
-{
-
- /**
- * strict lock providing a const pointer access to the synchronized value type.
- *
- * @param T the value type.
- * @param Lockable the mutex type protecting the value type.
- */
- template <typename T, typename Lockable = mutex>
- class const_strict_lock_ptr
- {
- public:
- typedef T value_type;
- typedef Lockable mutex_type;
- protected:
-
- // this should be a strict_lock, but unique_lock is needed to be able to return it.
- boost::unique_lock<mutex_type> lk_;
- T const& value_;
-
- public:
- BOOST_THREAD_MOVABLE_ONLY( const_strict_lock_ptr )
-
- /**
- * @param value constant reference of the value to protect.
- * @param mtx reference to the mutex used to protect the value.
- * @effects locks the mutex @c mtx, stores a reference to it and to the value type @c value.
- */
- const_strict_lock_ptr(T const& val, Lockable & mtx) :
- lk_(mtx), value_(val)
- {
- }
- const_strict_lock_ptr(T const& val, Lockable & mtx, adopt_lock_t tag) BOOST_NOEXCEPT :
- lk_(mtx, tag), value_(val)
- {
- }
- /**
- * Move constructor.
- * @effects takes ownership of the mutex owned by @c other, stores a reference to the mutex and the value type of @c other.
- */
- const_strict_lock_ptr(BOOST_THREAD_RV_REF(const_strict_lock_ptr) other) BOOST_NOEXCEPT
- : lk_(boost::move(BOOST_THREAD_RV(other).lk_)),value_(BOOST_THREAD_RV(other).value_)
- {
- }
-
- ~const_strict_lock_ptr()
- {
- }
-
- /**
- * @return a constant pointer to the protected value
- */
- const T* operator->() const
- {
- return &value_;
- }
-
- /**
- * @return a constant reference to the protected value
- */
- const T& operator*() const
- {
- return value_;
- }
-
- };
-
- /**
- * strict lock providing a pointer access to the synchronized value type.
- *
- * @param T the value type.
- * @param Lockable the mutex type protecting the value type.
- */
- template <typename T, typename Lockable = mutex>
- class strict_lock_ptr : public const_strict_lock_ptr<T,Lockable>
- {
- typedef const_strict_lock_ptr<T,Lockable> base_type;
- public:
- BOOST_THREAD_MOVABLE_ONLY( strict_lock_ptr )
-
- /**
- * @param value reference of the value to protect.
- * @param mtx reference to the mutex used to protect the value.
- * @effects locks the mutex @c mtx, stores a reference to it and to the value type @c value.
- */
- strict_lock_ptr(T & val, Lockable & mtx) :
- base_type(val, mtx)
- {
- }
- strict_lock_ptr(T & val, Lockable & mtx, adopt_lock_t tag) :
- base_type(val, mtx, tag)
- {
- }
-
- /**
- * Move constructor.
- * @effects takes ownership of the mutex owned by @c other, stores a reference to the mutex and the value type of @c other.
- */
- strict_lock_ptr(BOOST_THREAD_RV_REF(strict_lock_ptr) other)
- : base_type(boost::move(static_cast<base_type&>(other)))
- {
- }
-
- ~strict_lock_ptr()
- {
- }
-
- /**
- * @return a pointer to the protected value
- */
- T* operator->()
- {
- return const_cast<T*>(&this->value_);
- }
-
- /**
- * @return a reference to the protected value
- */
- T& operator*()
- {
- return const_cast<T&>(this->value_);
- }
-
- };
-
- template <typename SV>
- struct synchronized_value_strict_lock_ptr
- {
- typedef strict_lock_ptr<typename SV::value_type, typename SV::mutex_type> type;
- };
-
- template <typename SV>
- struct synchronized_value_strict_lock_ptr<const SV>
- {
- typedef const_strict_lock_ptr<typename SV::value_type, typename SV::mutex_type> type;
- };
- /**
- * unique_lock providing a const pointer access to the synchronized value type.
- *
- * An object of type const_unique_lock_ptr is a unique_lock that provides a const pointer access to the synchronized value type.
- * As unique_lock controls the ownership of a lockable object within a scope.
- * Ownership of the lockable object may be acquired at construction or after construction,
- * and may be transferred, after acquisition, to another const_unique_lock_ptr object.
- * Objects of type const_unique_lock_ptr are not copyable but are movable.
- * The behavior of a program is undefined if the mutex and the value type
- * pointed do not exist for the entire remaining lifetime of the const_unique_lock_ptr object.
- * The supplied Mutex type shall meet the BasicLockable requirements.
- *
- * @note const_unique_lock_ptr<T, Lockable> meets the Lockable requirements.
- * If Lockable meets the TimedLockable requirements, const_unique_lock_ptr<T,Lockable>
- * also meets the TimedLockable requirements.
- *
- * @param T the value type.
- * @param Lockable the mutex type protecting the value type.
- */
- template <typename T, typename Lockable = mutex>
- class const_unique_lock_ptr : public unique_lock<Lockable>
- {
- typedef unique_lock<Lockable> base_type;
- public:
- typedef T value_type;
- typedef Lockable mutex_type;
- protected:
- T const& value_;
-
- public:
- BOOST_THREAD_MOVABLE_ONLY(const_unique_lock_ptr)
-
- /**
- * @param value reference of the value to protect.
- * @param mtx reference to the mutex used to protect the value.
- *
- * @requires If mutex_type is not a recursive mutex the calling thread does not own the mutex.
- *
- * @effects locks the mutex @c mtx, stores a reference to it and to the value type @c value.
- */
- const_unique_lock_ptr(T const& val, Lockable & mtx)
- : base_type(mtx), value_(val)
- {
- }
- /**
- * @param value reference of the value to protect.
- * @param mtx reference to the mutex used to protect the value.
- * @param tag of type adopt_lock_t used to differentiate the constructor.
- * @requires The calling thread own the mutex.
- * @effects stores a reference to it and to the value type @c value taking ownership.
- */
- const_unique_lock_ptr(T const& val, Lockable & mtx, adopt_lock_t) BOOST_NOEXCEPT
- : base_type(mtx, adopt_lock), value_(val)
- {
- }
- /**
- * @param value reference of the value to protect.
- * @param mtx reference to the mutex used to protect the value.
- * @param tag of type defer_lock_t used to differentiate the constructor.
- * @effects stores a reference to it and to the value type @c value c.
- */
- const_unique_lock_ptr(T const& val, Lockable & mtx, defer_lock_t) BOOST_NOEXCEPT
- : base_type(mtx, defer_lock), value_(val)
- {
- }
- /**
- * @param value reference of the value to protect.
- * @param mtx reference to the mutex used to protect the value.
- * @param tag of type try_to_lock_t used to differentiate the constructor.
- * @requires If mutex_type is not a recursive mutex the calling thread does not own the mutex.
- * @effects try to lock the mutex @c mtx, stores a reference to it and to the value type @c value.
- */
- const_unique_lock_ptr(T const& val, Lockable & mtx, try_to_lock_t) BOOST_NOEXCEPT
- : base_type(mtx, try_to_lock), value_(val)
- {
- }
- /**
- * Move constructor.
- * @effects takes ownership of the mutex owned by @c other, stores a reference to the mutex and the value type of @c other.
- */
- const_unique_lock_ptr(BOOST_THREAD_RV_REF(const_unique_lock_ptr) other) BOOST_NOEXCEPT
- : base_type(boost::move(static_cast<base_type&>(other))), value_(BOOST_THREAD_RV(other).value_)
- {
- }
-
- /**
- * @effects If owns calls unlock() on the owned mutex.
- */
- ~const_unique_lock_ptr()
- {
- }
-
- /**
- * @return a constant pointer to the protected value
- */
- const T* operator->() const
- {
- BOOST_ASSERT (this->owns_lock());
- return &value_;
- }
-
- /**
- * @return a constant reference to the protected value
- */
- const T& operator*() const
- {
- BOOST_ASSERT (this->owns_lock());
- return value_;
- }
-
- };
-
- /**
- * unique lock providing a pointer access to the synchronized value type.
- *
- * @param T the value type.
- * @param Lockable the mutex type protecting the value type.
- */
- template <typename T, typename Lockable = mutex>
- class unique_lock_ptr : public const_unique_lock_ptr<T, Lockable>
- {
- typedef const_unique_lock_ptr<T, Lockable> base_type;
- public:
- typedef T value_type;
- typedef Lockable mutex_type;
-
- BOOST_THREAD_MOVABLE_ONLY(unique_lock_ptr)
-
- /**
- * @param value reference of the value to protect.
- * @param mtx reference to the mutex used to protect the value.
- * @effects locks the mutex @c mtx, stores a reference to it and to the value type @c value.
- */
- unique_lock_ptr(T & val, Lockable & mtx)
- : base_type(val, mtx)
- {
- }
- /**
- * @param value reference of the value to protect.
- * @param mtx reference to the mutex used to protect the value.
- * @param tag of type adopt_lock_t used to differentiate the constructor.
- * @effects stores a reference to it and to the value type @c value taking ownership.
- */
- unique_lock_ptr(T & value, Lockable & mtx, adopt_lock_t) BOOST_NOEXCEPT
- : base_type(value, mtx, adopt_lock)
- {
- }
- /**
- * @param value reference of the value to protect.
- * @param mtx reference to the mutex used to protect the value.
- * @param tag of type defer_lock_t used to differentiate the constructor.
- * @effects stores a reference to it and to the value type @c value c.
- */
- unique_lock_ptr(T & value, Lockable & mtx, defer_lock_t) BOOST_NOEXCEPT
- : base_type(value, mtx, defer_lock)
- {
- }
- /**
- * @param value reference of the value to protect.
- * @param mtx reference to the mutex used to protect the value.
- * @param tag of type try_to_lock_t used to differentiate the constructor.
- * @effects try to lock the mutex @c mtx, stores a reference to it and to the value type @c value.
- */
- unique_lock_ptr(T & value, Lockable & mtx, try_to_lock_t) BOOST_NOEXCEPT
- : base_type(value, mtx, try_to_lock)
- {
- }
- /**
- * Move constructor.
- * @effects takes ownership of the mutex owned by @c other, stores a reference to the mutex and the value type of @c other.
- */
- unique_lock_ptr(BOOST_THREAD_RV_REF(unique_lock_ptr) other) BOOST_NOEXCEPT
- : base_type(boost::move(static_cast<base_type&>(other)))
- {
- }
-
- ~unique_lock_ptr()
- {
- }
-
- /**
- * @return a pointer to the protected value
- */
- T* operator->()
- {
- BOOST_ASSERT (this->owns_lock());
- return const_cast<T*>(&this->value_);
- }
-
- /**
- * @return a reference to the protected value
- */
- T& operator*()
- {
- BOOST_ASSERT (this->owns_lock());
- return const_cast<T&>(this->value_);
- }
-
-
- };
-
- template <typename SV>
- struct synchronized_value_unique_lock_ptr
- {
- typedef unique_lock_ptr<typename SV::value_type, typename SV::mutex_type> type;
- };
-
- template <typename SV>
- struct synchronized_value_unique_lock_ptr<const SV>
- {
- typedef const_unique_lock_ptr<typename SV::value_type, typename SV::mutex_type> type;
- };
- /**
- * cloaks a value type and the mutex used to protect it together.
- * @param T the value type.
- * @param Lockable the mutex type protecting the value type.
- */
- template <typename T, typename Lockable = mutex>
- class synchronized_value
- {
-
-#if ! defined(BOOST_THREAD_NO_MAKE_UNIQUE_LOCKS)
-#if ! defined BOOST_NO_CXX11_VARIADIC_TEMPLATES
- template <typename ...SV>
- friend std::tuple<typename synchronized_value_strict_lock_ptr<SV>::type ...> synchronize(SV& ...sv);
-#else
- template <typename SV1, typename SV2>
- friend std::tuple<
- typename synchronized_value_strict_lock_ptr<SV1>::type,
- typename synchronized_value_strict_lock_ptr<SV2>::type
- >
- synchronize(SV1& sv1, SV2& sv2);
- template <typename SV1, typename SV2, typename SV3>
- friend std::tuple<
- typename synchronized_value_strict_lock_ptr<SV1>::type,
- typename synchronized_value_strict_lock_ptr<SV2>::type,
- typename synchronized_value_strict_lock_ptr<SV3>::type
- >
- synchronize(SV1& sv1, SV2& sv2, SV3& sv3);
-#endif
-#endif
-
- public:
- typedef T value_type;
- typedef Lockable mutex_type;
- private:
- T value_;
- mutable mutex_type mtx_;
- public:
- // construction/destruction
- /**
- * Default constructor.
- *
- * @Requires: T is DefaultConstructible
- */
- synchronized_value()
- //BOOST_NOEXCEPT_IF(is_nothrow_default_constructible<T>::value)
- : value_()
- {
- }
-
- /**
- * Constructor from copy constructible value.
- *
- * Requires: T is CopyConstructible
- */
- synchronized_value(T const& other)
- //BOOST_NOEXCEPT_IF(is_nothrow_copy_constructible<T>::value)
- : value_(other)
- {
- }
-
- /**
- * Move Constructor.
- *
- * Requires: T is CopyMovable
- */
- synchronized_value(BOOST_THREAD_RV_REF(T) other)
- //BOOST_NOEXCEPT_IF(is_nothrow_move_constructible<T>::value)
- : value_(boost::move(other))
- {
- }
-
- /**
- * Constructor from value type.
- *
- * Requires: T is DefaultConstructible and Assignable
- * Effects: Assigns the value on a scope protected by the mutex of the rhs. The mutex is not copied.
- */
- synchronized_value(synchronized_value const& rhs)
- {
- strict_lock<mutex_type> lk(rhs.mtx_);
- value_ = rhs.value_;
- }
-
- /**
- * Move Constructor from movable value type
- *
- */
- synchronized_value(BOOST_THREAD_RV_REF(synchronized_value) other)
- {
- strict_lock<mutex_type> lk(BOOST_THREAD_RV(other).mtx_);
- value_= boost::move(BOOST_THREAD_RV(other).value_);
- }
-
- // mutation
- /**
- * Assignment operator.
- *
- * Effects: Copies the underlying value on a scope protected by the two mutexes.
- * The mutex is not copied. The locks are acquired using lock, so deadlock is avoided.
- * For example, there is no problem if one thread assigns a = b and the other assigns b = a.
- *
- * Return: *this
- */
-
- synchronized_value& operator=(synchronized_value const& rhs)
- {
- if(&rhs != this)
- {
- // auto _ = make_unique_locks(mtx_, rhs.mtx_);
- unique_lock<mutex_type> lk1(mtx_, defer_lock);
- unique_lock<mutex_type> lk2(rhs.mtx_, defer_lock);
- lock(lk1,lk2);
-
- value_ = rhs.value_;
- }
- return *this;
- }
- /**
- * Assignment operator from a T const&.
- * Effects: The operator copies the value on a scope protected by the mutex.
- * Return: *this
- */
- synchronized_value& operator=(value_type const& val)
- {
- {
- strict_lock<mutex_type> lk(mtx_);
- value_ = val;
- }
- return *this;
- }
-
- //observers
- /**
- * Explicit conversion to value type.
- *
- * Requires: T is CopyConstructible
- * Return: A copy of the protected value obtained on a scope protected by the mutex.
- *
- */
- T get() const
- {
- strict_lock<mutex_type> lk(mtx_);
- return value_;
- }
- /**
- * Explicit conversion to value type.
- *
- * Requires: T is CopyConstructible
- * Return: A copy of the protected value obtained on a scope protected by the mutex.
- *
- */
-#if ! defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS)
- explicit operator T() const
- {
- return get();
- }
-#endif
-
- /**
- * value type getter.
- *
- * Return: A constant reference to the protected value.
- *
- * Note: Not thread safe
- *
- */
- T const& value() const
- {
- return value_;
- }
- /**
- * mutex getter.
- *
- * Return: A constant reference to the protecting mutex.
- *
- * Note: Not thread safe
- *
- */
- mutex_type const& mutex() const
- {
- return mtx_;
- }
- /**
- * Swap
- *
- * Effects: Swaps the data. Again, locks are acquired using lock(). The mutexes are not swapped.
- * A swap method accepts a T& and swaps the data inside a critical section.
- * This is by far the preferred method of changing the guarded datum wholesale because it keeps the lock only
- * for a short time, thus lowering the pressure on the mutex.
- */
- void swap(synchronized_value & rhs)
- {
- if (this == &rhs) {
- return;
- }
- // auto _ = make_unique_locks(mtx_, rhs.mtx_);
- unique_lock<mutex_type> lk1(mtx_, defer_lock);
- unique_lock<mutex_type> lk2(rhs.mtx_, defer_lock);
- lock(lk1,lk2);
- boost::swap(value_, rhs.value_);
- }
- /**
- * Swap with the underlying value type
- *
- * Effects: Swaps the data on a scope protected by the mutex.
- */
- void swap(value_type & rhs)
- {
- strict_lock<mutex_type> lk(mtx_);
- boost::swap(value_, rhs);
- }
-
- /**
- * Essentially calling a method obj->foo(x, y, z) calls the method foo(x, y, z) inside a critical section as
- * long-lived as the call itself.
- */
- strict_lock_ptr<T,Lockable> operator->()
- {
- return BOOST_THREAD_MAKE_RV_REF((strict_lock_ptr<T,Lockable>(value_, mtx_)));
- }
- /**
- * If the synchronized_value object involved is const-qualified, then you'll only be able to call const methods
- * through operator->. So, for example, vec->push_back("xyz") won't work if vec were const-qualified.
- * The locking mechanism capitalizes on the assumption that const methods don't modify their underlying data.
- */
- const_strict_lock_ptr<T,Lockable> operator->() const
- {
- return BOOST_THREAD_MAKE_RV_REF((const_strict_lock_ptr<T,Lockable>(value_, mtx_)));
- }
-
- /**
- * Call function on a locked block.
- *
- * @requires fct(value_) is well formed.
- *
- * Example
- * void fun(synchronized_value<vector<int>> & v) {
- * v ( [](vector<int>> & vec)
- * {
- * vec.push_back(42);
- * assert(vec.back() == 42);
- * } );
- * }
- */
- template <typename F>
- inline
- typename boost::result_of<F(value_type&)>::type
- operator()(BOOST_THREAD_RV_REF(F) fct)
- {
- strict_lock<mutex_type> lk(mtx_);
- return fct(value_);
- }
- template <typename F>
- inline
- typename boost::result_of<F(value_type const&)>::type
- operator()(BOOST_THREAD_RV_REF(F) fct) const
- {
- strict_lock<mutex_type> lk(mtx_);
- return fct(value_);
- }
-
-
-#if defined BOOST_NO_CXX11_RVALUE_REFERENCES
- template <typename F>
- inline
- typename boost::result_of<F(value_type&)>::type
- operator()(F const & fct)
- {
- strict_lock<mutex_type> lk(mtx_);
- return fct(value_);
- }
- template <typename F>
- inline
- typename boost::result_of<F(value_type const&)>::type
- operator()(F const & fct) const
- {
- strict_lock<mutex_type> lk(mtx_);
- return fct(value_);
- }
-
- template <typename R>
- inline
- R operator()(R(*fct)(value_type&))
- {
- strict_lock<mutex_type> lk(mtx_);
- return fct(value_);
- }
- template <typename R>
- inline
- R operator()(R(*fct)(value_type const&)) const
- {
- strict_lock<mutex_type> lk(mtx_);
- return fct(value_);
- }
-#endif
-
-
- /**
- * The synchronize() factory make easier to lock on a scope.
- * As discussed, operator-> can only lock over the duration of a call, so it is insufficient for complex operations.
- * With synchronize() you get to lock the object in a scoped and to directly access the object inside that scope.
- *
- * Example
- * void fun(synchronized_value<vector<int>> & v) {
- * auto&& vec=v.synchronize();
- * vec.push_back(42);
- * assert(vec.back() == 42);
- * }
- */
- strict_lock_ptr<T,Lockable> synchronize()
- {
- return BOOST_THREAD_MAKE_RV_REF((strict_lock_ptr<T,Lockable>(value_, mtx_)));
- }
- const_strict_lock_ptr<T,Lockable> synchronize() const
- {
- return BOOST_THREAD_MAKE_RV_REF((const_strict_lock_ptr<T,Lockable>(value_, mtx_)));
- }
-
- unique_lock_ptr<T,Lockable> unique_synchronize()
- {
- return BOOST_THREAD_MAKE_RV_REF((unique_lock_ptr<T,Lockable>(value_, mtx_)));
- }
- const_unique_lock_ptr<T,Lockable> unique_synchronize() const
- {
- return BOOST_THREAD_MAKE_RV_REF((const_unique_lock_ptr<T,Lockable>(value_, mtx_)));
- }
- unique_lock_ptr<T,Lockable> unique_synchronize(defer_lock_t tag)
- {
- return BOOST_THREAD_MAKE_RV_REF((unique_lock_ptr<T,Lockable>(value_, mtx_, tag)));
- }
- const_unique_lock_ptr<T,Lockable> unique_synchronize(defer_lock_t tag) const
- {
- return BOOST_THREAD_MAKE_RV_REF((const_unique_lock_ptr<T,Lockable>(value_, mtx_, tag)));
- }
- unique_lock_ptr<T,Lockable> defer_synchronize() BOOST_NOEXCEPT
- {
- return BOOST_THREAD_MAKE_RV_REF((unique_lock_ptr<T,Lockable>(value_, mtx_, defer_lock)));
- }
- const_unique_lock_ptr<T,Lockable> defer_synchronize() const BOOST_NOEXCEPT
- {
- return BOOST_THREAD_MAKE_RV_REF((const_unique_lock_ptr<T,Lockable>(value_, mtx_, defer_lock)));
- }
- unique_lock_ptr<T,Lockable> try_to_synchronize() BOOST_NOEXCEPT
- {
- return BOOST_THREAD_MAKE_RV_REF((unique_lock_ptr<T,Lockable>(value_, mtx_, try_to_lock)));
- }
- const_unique_lock_ptr<T,Lockable> try_to_synchronize() const BOOST_NOEXCEPT
- {
- return BOOST_THREAD_MAKE_RV_REF((const_unique_lock_ptr<T,Lockable>(value_, mtx_, try_to_lock)));
- }
- unique_lock_ptr<T,Lockable> adopt_synchronize() BOOST_NOEXCEPT
- {
- return BOOST_THREAD_MAKE_RV_REF((unique_lock_ptr<T,Lockable>(value_, mtx_, adopt_lock)));
- }
- const_unique_lock_ptr<T,Lockable> adopt_synchronize() const BOOST_NOEXCEPT
- {
- return BOOST_THREAD_MAKE_RV_REF((const_unique_lock_ptr<T,Lockable>(value_, mtx_, adopt_lock)));
- }
-
-
-#if ! defined __IBMCPP__
- private:
-#endif
- class deref_value
- {
- private:
- friend class synchronized_value;
-
- boost::unique_lock<mutex_type> lk_;
- T& value_;
-
- explicit deref_value(synchronized_value& outer):
- lk_(outer.mtx_),value_(outer.value_)
- {}
-
- public:
- BOOST_THREAD_MOVABLE_ONLY(deref_value)
-
- deref_value(BOOST_THREAD_RV_REF(deref_value) other):
- lk_(boost::move(BOOST_THREAD_RV(other).lk_)),value_(BOOST_THREAD_RV(other).value_)
- {}
- operator T&()
- {
- return value_;
- }
-
- deref_value& operator=(T const& newVal)
- {
- value_=newVal;
- return *this;
- }
- };
- class const_deref_value
- {
- private:
- friend class synchronized_value;
-
- boost::unique_lock<mutex_type> lk_;
- const T& value_;
-
- explicit const_deref_value(synchronized_value const& outer):
- lk_(outer.mtx_), value_(outer.value_)
- {}
-
- public:
- BOOST_THREAD_MOVABLE_ONLY(const_deref_value)
-
- const_deref_value(BOOST_THREAD_RV_REF(const_deref_value) other):
- lk_(boost::move(BOOST_THREAD_RV(other).lk_)), value_(BOOST_THREAD_RV(other).value_)
- {}
-
- operator const T&()
- {
- return value_;
- }
- };
-
- public:
- deref_value operator*()
- {
- return BOOST_THREAD_MAKE_RV_REF(deref_value(*this));
- }
-
- const_deref_value operator*() const
- {
- return BOOST_THREAD_MAKE_RV_REF(const_deref_value(*this));
- }
-
- // io functions
- /**
- * @requires T is OutputStreamable
- * @effects saves the value type on the output stream @c os.
- */
- template <typename OStream>
- void save(OStream& os) const
- {
- strict_lock<mutex_type> lk(mtx_);
- os << value_;
- }
- /**
- * @requires T is InputStreamable
- * @effects loads the value type from the input stream @c is.
- */
- template <typename IStream>
- void load(IStream& is)
- {
- strict_lock<mutex_type> lk(mtx_);
- is >> value_;
- }
-
- // relational operators
- /**
- * @requires T is EqualityComparable
- *
- */
- bool operator==(synchronized_value const& rhs) const
- {
- unique_lock<mutex_type> lk1(mtx_, defer_lock);
- unique_lock<mutex_type> lk2(rhs.mtx_, defer_lock);
- lock(lk1,lk2);
-
- return value_ == rhs.value_;
- }
- /**
- * @requires T is LessThanComparable
- *
- */
- bool operator<(synchronized_value const& rhs) const
- {
- unique_lock<mutex_type> lk1(mtx_, defer_lock);
- unique_lock<mutex_type> lk2(rhs.mtx_, defer_lock);
- lock(lk1,lk2);
-
- return value_ < rhs.value_;
- }
- /**
- * @requires T is GreaterThanComparable
- *
- */
- bool operator>(synchronized_value const& rhs) const
- {
- unique_lock<mutex_type> lk1(mtx_, defer_lock);
- unique_lock<mutex_type> lk2(rhs.mtx_, defer_lock);
- lock(lk1,lk2);
-
- return value_ > rhs.value_;
- }
- bool operator<=(synchronized_value const& rhs) const
- {
- unique_lock<mutex_type> lk1(mtx_, defer_lock);
- unique_lock<mutex_type> lk2(rhs.mtx_, defer_lock);
- lock(lk1,lk2);
-
- return value_ <= rhs.value_;
- }
- bool operator>=(synchronized_value const& rhs) const
- {
- unique_lock<mutex_type> lk1(mtx_, defer_lock);
- unique_lock<mutex_type> lk2(rhs.mtx_, defer_lock);
- lock(lk1,lk2);
-
- return value_ >= rhs.value_;
- }
- bool operator==(value_type const& rhs) const
- {
- unique_lock<mutex_type> lk1(mtx_);
-
- return value_ == rhs;
- }
- bool operator!=(value_type const& rhs) const
- {
- unique_lock<mutex_type> lk1(mtx_);
-
- return value_ != rhs;
- }
- bool operator<(value_type const& rhs) const
- {
- unique_lock<mutex_type> lk1(mtx_);
-
- return value_ < rhs;
- }
- bool operator<=(value_type const& rhs) const
- {
- unique_lock<mutex_type> lk1(mtx_);
-
- return value_ <= rhs;
- }
- bool operator>(value_type const& rhs) const
- {
- unique_lock<mutex_type> lk1(mtx_);
-
- return value_ > rhs;
- }
- bool operator>=(value_type const& rhs) const
- {
- unique_lock<mutex_type> lk1(mtx_);
-
- return value_ >= rhs;
- }
-
- };
-
- // Specialized algorithms
- /**
- *
- */
- template <typename T, typename L>
- inline void swap(synchronized_value<T,L> & lhs, synchronized_value<T,L> & rhs)
- {
- lhs.swap(rhs);
- }
- template <typename T, typename L>
- inline void swap(synchronized_value<T,L> & lhs, T & rhs)
- {
- lhs.swap(rhs);
- }
- template <typename T, typename L>
- inline void swap(T & lhs, synchronized_value<T,L> & rhs)
- {
- rhs.swap(lhs);
- }
-
- //Hash support
-
-// template <class T> struct hash;
-// template <typename T, typename L>
-// struct hash<synchronized_value<T,L> >;
-
- // Comparison with T
- template <typename T, typename L>
- bool operator!=(synchronized_value<T,L> const&lhs, synchronized_value<T,L> const& rhs)
- {
- return ! (lhs==rhs);
- }
-
- template <typename T, typename L>
- bool operator==(T const& lhs, synchronized_value<T,L> const&rhs)
- {
- return rhs==lhs;
- }
- template <typename T, typename L>
- bool operator!=(T const& lhs, synchronized_value<T,L> const&rhs)
- {
- return rhs!=lhs;
- }
- template <typename T, typename L>
- bool operator<(T const& lhs, synchronized_value<T,L> const&rhs)
- {
- return rhs>lhs;
- }
- template <typename T, typename L>
- bool operator<=(T const& lhs, synchronized_value<T,L> const&rhs)
- {
- return rhs>=lhs;
- }
- template <typename T, typename L>
- bool operator>(T const& lhs, synchronized_value<T,L> const&rhs)
- {
- return rhs<lhs;
- }
- template <typename T, typename L>
- bool operator>=(T const& lhs, synchronized_value<T,L> const&rhs)
- {
- return rhs<=lhs;
- }
-
- /**
- *
- */
- template <typename OStream, typename T, typename L>
- inline OStream& operator<<(OStream& os, synchronized_value<T,L> const& rhs)
- {
- rhs.save(os);
- return os;
- }
- template <typename IStream, typename T, typename L>
- inline IStream& operator>>(IStream& is, synchronized_value<T,L>& rhs)
- {
- rhs.load(is);
- return is;
- }
-
-#if ! defined(BOOST_THREAD_NO_SYNCHRONIZE)
-#if ! defined BOOST_NO_CXX11_VARIADIC_TEMPLATES
-
- template <typename ...SV>
- std::tuple<typename synchronized_value_strict_lock_ptr<SV>::type ...> synchronize(SV& ...sv)
- {
- boost::lock(sv.mtx_ ...);
- typedef std::tuple<typename synchronized_value_strict_lock_ptr<SV>::type ...> t_type;
-
- return t_type(typename synchronized_value_strict_lock_ptr<SV>::type(sv.value_, sv.mtx_, adopt_lock) ...);
- }
-#else
-
- template <typename SV1, typename SV2>
- std::tuple<
- typename synchronized_value_strict_lock_ptr<SV1>::type,
- typename synchronized_value_strict_lock_ptr<SV2>::type
- >
- synchronize(SV1& sv1, SV2& sv2)
- {
- boost::lock(sv1.mtx_, sv2.mtx_);
- typedef std::tuple<
- typename synchronized_value_strict_lock_ptr<SV1>::type,
- typename synchronized_value_strict_lock_ptr<SV2>::type
- > t_type;
-
- return t_type(
- typename synchronized_value_strict_lock_ptr<SV1>::type(sv1.value_, sv1.mtx_, adopt_lock),
- typename synchronized_value_strict_lock_ptr<SV2>::type(sv2.value_, sv2.mtx_, adopt_lock)
- );
-
- }
- template <typename SV1, typename SV2, typename SV3>
- std::tuple<
- typename synchronized_value_strict_lock_ptr<SV1>::type,
- typename synchronized_value_strict_lock_ptr<SV2>::type,
- typename synchronized_value_strict_lock_ptr<SV3>::type
- >
- synchronize(SV1& sv1, SV2& sv2, SV3& sv3)
- {
- boost::lock(sv1.mtx_, sv2.mtx_);
- typedef std::tuple<
- typename synchronized_value_strict_lock_ptr<SV1>::type,
- typename synchronized_value_strict_lock_ptr<SV2>::type,
- typename synchronized_value_strict_lock_ptr<SV3>::type
- > t_type;
-
- return t_type(
- typename synchronized_value_strict_lock_ptr<SV1>::type(sv1.value_, sv1.mtx_, adopt_lock),
- typename synchronized_value_strict_lock_ptr<SV2>::type(sv2.value_, sv2.mtx_, adopt_lock),
- typename synchronized_value_strict_lock_ptr<SV3>::type(sv3.value_, sv3.mtx_, adopt_lock)
- );
-
- }
-#endif
-#endif
-}
-
-#include <boost/config/abi_suffix.hpp>
-
-#endif // header
projects / ceph.git / blobdiff