AtomicCount.h
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/* -*- C++ -*- */
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**
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#ifndef ATOMIC_COUNT
#define ATOMIC_COUNT
#include "Utility.h"
#if defined(__SUNPRO_CC) || defined(__TOS_AIX__)
#include "Mutex.h"
#endif
#ifdef ENABLE_BOOST_ATOMIC_COUNT
#include <boost/smart_ptr/detail/atomic_count.hpp>
#endif
namespace FIX
{
#ifdef ENABLE_BOOST_ATOMIC_COUNT
typedef boost::detail::atomic_count atomic_count;
#elif _MSC_VER
//atomic counter based on interlocked functions for Win32
class atomic_count
{
public:
explicit atomic_count( long v ): m_counter( v )
{
}
long operator++()
{
return ::InterlockedIncrement( &m_counter );
}
long operator--()
{
return ::InterlockedDecrement( &m_counter );
}
operator long() const
{
return ::InterlockedExchangeAdd(const_cast<long volatile *>( &m_counter ), 0 );
}
private:
atomic_count( atomic_count const & );
atomic_count & operator=( atomic_count const & );
long volatile m_counter;
};
#elif defined(__SUNPRO_CC) || defined(__TOS_AIX__)
// general purpose atomic counter using mutexes
class atomic_count
{
public:
explicit atomic_count( long v ): m_counter( v )
{
}
long operator++()
{
Locker _lock(m_mutex);
return ++m_counter;
}
long operator--()
{
Locker _lock(m_mutex);
return --m_counter;
}
operator long() const
{
return static_cast<long const volatile &>( m_counter );
}
private:
atomic_count( atomic_count const & );
atomic_count & operator=( atomic_count const & );
Mutex m_mutex;
long m_counter;
};
#else
//
// boost/detail/atomic_count_gcc_x86.hpp
//
// atomic_count for g++ on 486+/AMD64
//
// Copyright 2007 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)
//
class atomic_count
{
public:
explicit atomic_count( long v ) : value_(static_cast<int>(v)) {}
long operator++()
{
return atomic_exchange_and_add( &value_, 1 ) + 1;
}
long operator--()
{
return atomic_exchange_and_add( &value_, -1 ) - 1;
}
operator long() const
{
return atomic_exchange_and_add( &value_, 0 );
}
private:
atomic_count( atomic_count const & );
atomic_count & operator=( atomic_count const & );
mutable int value_;
private:
static int atomic_exchange_and_add(int * pw, int dv)
{
// int r = *pw;
// *pw += dv;
// return r;
int r;
__asm__ __volatile__
(
"lock\n\t"
"xadd %1, %0":
"+m"(*pw), "=r"(r) : // outputs (%0, %1)
"1"(dv) : // inputs (%2 == %1)
"memory", "cc" // clobbers
);
return r;
}
};
#endif
}
#endif
Mutex.h
Utility.h
FIX::atomic_count
Atomic count class - consider using interlocked functions.
Definition: AtomicCount.h:127
FIX::atomic_count::atomic_count
atomic_count(long v)
Definition: AtomicCount.h:130
FIX::atomic_count::atomic_exchange_and_add
static int atomic_exchange_and_add(int *pw, int dv)
Definition: AtomicCount.h:156
FIX::atomic_count::value_
int value_
Definition: AtomicCount.h:152
FIX::atomic_count::atomic_count
atomic_count(atomic_count const &)
FIX::atomic_count::operator++
long operator++()
Definition: AtomicCount.h:132
FIX::atomic_count::operator=
atomic_count & operator=(atomic_count const &)
FIX::atomic_count::operator--
long operator--()
Definition: AtomicCount.h:137
FIX
Definition: Acceptor.cpp:35