80 lines
1.3 KiB
C++
80 lines
1.3 KiB
C++
|
#ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_PT_HPP_INCLUDED
|
||
|
|
#define BOOST_SMART_PTR_DETAIL_SPINLOCK_PT_HPP_INCLUDED
|
||
|
|
|
||
|
|
// MS compatible compilers support #pragma once
|
||
|
|
|
||
|
|
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
|
||
|
|
# pragma once
|
||
|
|
#endif
|
||
|
|
|
||
|
|
//
|
||
|
|
// Copyright (c) 2008 Peter Dimov
|
||
|
|
//
|
||
|
|
// 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 <pthread.h>
|
||
|
|
|
||
|
|
namespace boost
|
||
|
|
{
|
||
|
|
|
||
|
|
namespace detail
|
||
|
|
{
|
||
|
|
|
||
|
|
class spinlock
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
|
||
|
|
pthread_mutex_t v_;
|
||
|
|
|
||
|
|
public:
|
||
|
|
|
||
|
|
bool try_lock()
|
||
|
|
{
|
||
|
|
return pthread_mutex_trylock( &v_ ) == 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void lock()
|
||
|
|
{
|
||
|
|
pthread_mutex_lock( &v_ );
|
||
|
|
}
|
||
|
|
|
||
|
|
void unlock()
|
||
|
|
{
|
||
|
|
pthread_mutex_unlock( &v_ );
|
||
|
|
}
|
||
|
|
|
||
|
|
public:
|
||
|
|
|
||
|
|
class scoped_lock
|
||
|
|
{
|
||
|
|
private:
|
||
|
|
|
||
|
|
spinlock & sp_;
|
||
|
|
|
||
|
|
scoped_lock( scoped_lock const & );
|
||
|
|
scoped_lock & operator=( scoped_lock const & );
|
||
|
|
|
||
|
|
public:
|
||
|
|
|
||
|
|
explicit scoped_lock( spinlock & sp ): sp_( sp )
|
||
|
|
{
|
||
|
|
sp.lock();
|
||
|
|
}
|
||
|
|
|
||
|
|
~scoped_lock()
|
||
|
|
{
|
||
|
|
sp_.unlock();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace detail
|
||
|
|
} // namespace boost
|
||
|
|
|
||
|
|
#define BOOST_DETAIL_SPINLOCK_INIT { PTHREAD_MUTEX_INITIALIZER }
|
||
|
|
|
||
|
|
#endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_PT_HPP_INCLUDED
|