InterlockedExchangeSubtract performs an atomic subtraction of two values.
Syntax
Copy
unsigned long InterlockedExchangeSubtract(
unsigned long volatile *Addend,
unsigned long Value
);
Parameters
Addend
A pointer to a variable. The value of this variable is replaced with the result of the operation.
Value
The value to be exchanged with the value pointed to by Target.
Return Value
The function returns the initial value of the Addend parameter.
Remarks
This function generates a full memory barrier (or fence) to ensure that memory operations are completed in the proper sequence.
Requirements
| Minimum supported version | Header | Library |
|---|---|---|
|
eRTOS 1.0 SDK |
windows.h |
rtkrnl.lib |
See Also:
