Atomically decrements the value stored at the specified memory location.
inline int atomic_fetch_dec(
   _Inout_ int * _Dest
) restrict(amp);
inline unsigned int atomic_fetch_dec(
   _Inout_ unsigned int * _Dest
) restrict(amp);
Parameters
- _Dest
The location in memory of the value to be decremented. 
Return Value
The original value stored at the memory location.
Requirements
Header: amp.h
Namespace: Concurrency