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#ifndef BOOST_BASIC_RECURSIVE_MUTEX_WIN32_HPP
#define BOOST_BASIC_RECURSIVE_MUTEX_WIN32_HPP
// basic_recursive_mutex.hpp
//
// (C) Copyright 2006-8 Anthony Williams
// (C) Copyright 2011-2012 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)
#include <boost/thread/win32/thread_primitives.hpp>
#include <boost/thread/win32/basic_timed_mutex.hpp>
#ifdef BOOST_THREAD_USES_CHRONO
#include <boost/chrono/system_clocks.hpp>
#include <boost/chrono/ceil.hpp>
#endif
#include <boost/config/abi_prefix.hpp>
namespace boost
{
namespace detail
{
template<typename underlying_mutex_type>
struct basic_recursive_mutex_impl
{
long recursion_count;
long locking_thread_id;
underlying_mutex_type mutex;
void initialize()
{
recursion_count=0;
locking_thread_id=0;
mutex.initialize();
}
void destroy()
{
mutex.destroy();
}
bool try_lock() BOOST_NOEXCEPT
{
long const current_thread_id=win32::GetCurrentThreadId();
return try_recursive_lock(current_thread_id) || try_basic_lock(current_thread_id);
}
void lock()
{
long const current_thread_id=win32::GetCurrentThreadId();
if(!try_recursive_lock(current_thread_id))
{
mutex.lock();
BOOST_INTERLOCKED_EXCHANGE(&locking_thread_id,current_thread_id);
recursion_count=1;
}
}
bool timed_lock(::boost::system_time const& target)
{
long const current_thread_id=win32::GetCurrentThreadId();
return try_recursive_lock(current_thread_id) || try_timed_lock(current_thread_id,target);
}
template<typename Duration>
bool timed_lock(Duration const& timeout)
{
return timed_lock(get_system_time()+timeout);
}
#ifdef BOOST_THREAD_USES_CHRONO
template <class Rep, class Period>
bool try_lock_for(const chrono::duration<Rep, Period>& rel_time)
{
long const current_thread_id=win32::GetCurrentThreadId();
return try_recursive_lock(current_thread_id) || try_timed_lock_for(current_thread_id,rel_time);
}
template <class Clock, class Duration>
bool try_lock_until(const chrono::time_point<Clock, Duration>& t)
{
long const current_thread_id=win32::GetCurrentThreadId();
return try_recursive_lock(current_thread_id) || try_timed_lock_until(current_thread_id,t);
}
#endif
void unlock()
{
if(!--recursion_count)
{
BOOST_INTERLOCKED_EXCHANGE(&locking_thread_id,0);
mutex.unlock();
}
}
private:
bool try_recursive_lock(long current_thread_id) BOOST_NOEXCEPT
{
if(::boost::detail::interlocked_read_acquire(&locking_thread_id)==current_thread_id)
{
++recursion_count;
return true;
}
return false;
}
bool try_basic_lock(long current_thread_id) BOOST_NOEXCEPT
{
if(mutex.try_lock())
{
BOOST_INTERLOCKED_EXCHANGE(&locking_thread_id,current_thread_id);
recursion_count=1;
return true;
}
return false;
}
bool try_timed_lock(long current_thread_id,::boost::system_time const& target)
{
if(mutex.timed_lock(target))
{
BOOST_INTERLOCKED_EXCHANGE(&locking_thread_id,current_thread_id);
recursion_count=1;
return true;
}
return false;
}
template <typename TP>
bool try_timed_lock_until(long current_thread_id,TP const& target)
{
if(mutex.try_lock_until(target))
{
BOOST_INTERLOCKED_EXCHANGE(&locking_thread_id,current_thread_id);
recursion_count=1;
return true;
}
return false;
}
template <typename D>
bool try_timed_lock_for(long current_thread_id,D const& target)
{
if(mutex.try_lock_for(target))
{
BOOST_INTERLOCKED_EXCHANGE(&locking_thread_id,current_thread_id);
recursion_count=1;
return true;
}
return false;
}
};
typedef basic_recursive_mutex_impl<basic_timed_mutex> basic_recursive_mutex;
typedef basic_recursive_mutex_impl<basic_timed_mutex> basic_recursive_timed_mutex;
}
}
#define BOOST_BASIC_RECURSIVE_MUTEX_INITIALIZER {0}
#include <boost/config/abi_suffix.hpp>
#endif
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