InterlockedDecrement

InterlockedDecrement decrements (decreases by one) the value of the specified 32-bit variable as an atomic operation.

Syntax

LONG InterlockedDecrement(
    LONG volatile *Addend  
  );

Parameters

Addend

A pointer to the variable to be decremented.

Return Values

The function returns the resulting decremented value.

Remarks

The variable pointed to by the Addend parameter must be aligned on a 32-bit boundary; otherwise, this function will behave unpredictably on multiprocessor x86 systems and any non-x86 systems.

The interlocked functions provide a simple mechanism for synchronizing access to a variable that is shared by multiple threads. This function is atomic with respect to calls to other interlocked functions. It is thread-safe.

This function is implemented using a compiler intrinsic where possible. This function generates a full memory barrier (or fence) to ensure that memory operations are completed in order.

Requirements

Library

Rtx_Rtss.lib