FIX::atomic_count Class Reference

Atomic count class - consider using interlocked functions. More...

#include <AtomicCount.h>

Public Member Functions
	atomic_count (long v)
long	operator++ ()
long	operator-- ()
	operator long () const

Private Member Functions
	atomic_count (atomic_count const &)
atomic_count &	operator= (atomic_count const &)

Static Private Member Functions
static int	atomic_exchange_and_add (int *pw, int dv)

Private Attributes
int	value_

Detailed Description

Atomic count class - consider using interlocked functions.

Definition at line 126 of file AtomicCount.h.

Constructor & Destructor Documentation

atomic_count() [1/2]

FIX::atomic_count::atomic_count ( long v )

inlineexplicit

Definition at line 130 of file AtomicCount.h.

: value_(static_cast<int>(v)) {}

References value_.

Referenced by atomic_count(), and operator=().

atomic_count() [2/2]

FIX::atomic_count::atomic_count ( atomic_count const & )

private

References atomic_count().

Member Function Documentation

atomic_exchange_and_add()

int FIX::atomic_count::atomic_exchange_and_add ( int * pw, int dv )

inlinestaticprivate

Definition at line 156 of file AtomicCount.h.

    {
      // 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;
    }

Referenced by operator long(), operator++(), and operator--().

operator long()

FIX::atomic_count::operator long ( ) const

inline

Definition at line 142 of file AtomicCount.h.

    {
      return atomic_exchange_and_add( &value_, 0 );
    }

References atomic_exchange_and_add(), and value_.

operator++()

long FIX::atomic_count::operator++ ( )

inline

Definition at line 132 of file AtomicCount.h.

    {
      return atomic_exchange_and_add( &value_, 1 ) + 1;
    }

References atomic_exchange_and_add(), and value_.

operator--()

long FIX::atomic_count::operator-- ( )

inline

Definition at line 137 of file AtomicCount.h.

    {
      return atomic_exchange_and_add( &value_, -1 ) - 1;
    }

References atomic_exchange_and_add(), and value_.

operator=()

atomic_count & FIX::atomic_count::operator= ( atomic_count const & )

private

References atomic_count().

Member Data Documentation

value_

int FIX::atomic_count::value_

mutableprivate

Definition at line 152 of file AtomicCount.h.

Referenced by atomic_count(), operator long(), operator++(), and operator--().

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The documentation for this class was generated from the following file:

• AtomicCount.h