interface/wx/atomic.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        atomic.h
   3 // Purpose:     interface of global functions
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9
  10 // ============================================================================
  11 // Global functions/macros
  12 // ============================================================================
  13
  14 /** @addtogroup group_funcmacro_atomic */
  15 //@{
  16
  17 /**
  18     This function increments @a value in an atomic manner.
  19
  20     Whenever possible wxWidgets provides an efficient, CPU-specific,
  21     implementation of this function. If such implementation is available, the
  22     symbol wxHAS_ATOMIC_OPS is defined. Otherwise this function still exists
  23     but is implemented in a generic way using a critical section which can be
  24     prohibitively expensive for use in performance-sensitive code.
  25
  26     @header{wx/atomic.h}
  27 */
  28 void wxAtomicInc(wxAtomicInt& value);
  29
  30 /**
  31     This function decrements value in an atomic manner.
  32
  33     Returns 0 if value is 0 after decrement or any non-zero value (not
  34     necessarily equal to the value of the variable) otherwise.
  35
  36     @see wxAtomicInc
  37
  38     @header{wx/atomic.h}
  39 */
  40 wxInt32 wxAtomicDec(wxAtomicInt& value);
  41
  42 //@}
  43