atomic_xchg

Atomically exchanges a 32-bit value with the 32-bit value in the specified memory location.

Library:LibC

Classification:Other

Service:General C Services

Syntax

  #include <stdlib.h> 
   
  unsigned long atomic_xchg (
     unsigned long   *addr,
     unsigned long    value);

Parameters

addr: (IN) Points to the memory location for the operation.
value: (IN) Specifies the value to exchange.

Return Values

Returns the original value in the memory location.

Remarks

The memory location address is expected to be valid. If an invalid address is passed, the server will abend.

See Also