atomic_int64_compare_and_exchange
Description:
[ CCode ( cname = "gpseq_atomic_int64_compare_and_exchange" ) ]
public bool atomic_int64_compare_and_exchange (ref int64 atomic, int64 oldval, int64 newval)
public bool atomic_int64_compare_and_exchange (ref int64 atomic, int64 oldval, int64 newval)
Compares atomic to oldval and, if equal, sets it to newval. If atomic was not equal to oldval then no change occurs.
This compare and exchange is done atomically.
Think of this operation as an atomic version of:
{ if (*atomic == oldval) { *atomic = newval; return TRUE; } else return FALSE; }
This call acts as a full compiler and hardware memory barrier.
Parameters:
atomic | |
oldval |
the value to compare with |
newval |
the value to conditionally replace with |
Returns:
%TRUE if the exchange took place |
Namespace: Gpseq
Package: gpseq-1.0