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pr_atomicdecrement.rst (578B)

      1 PR_AtomicDecrement
      2 ==================
      3 
      4 Atomically decrements a 32-bit value.
      5 
      6 
      7 Syntax
      8 ------
      9 
     10 .. code::
     11 
     12   #include <pratom.h>
     13 
     14   PRInt32 PR_AtomicDecrement(PRInt32 *val);
     15 
     16 
     17 Parameter
     18 ~~~~~~~~~
     19 
     20 The function has the following parameter:
     21 
     22 ``val``
     23   A pointer to the value to decrement.
     24 
     25 
     26 Returns
     27 ~~~~~~~
     28 
     29 The function returns the decremented value (i.e., the result).
     30 
     31 
     32 Description
     33 -----------
     34 
     35 :ref:`PR_AtomicDecrement` first decrements the referenced variable by one.
     36 The value returned is the referenced variable's final value. The
     37 modification to memory is unconditional.