atomicIntExchange
fn
int atomicIntExchange(ref int atomic, int newval)Sets the atomic to newval and returns the old value from atomic.
This exchange is done atomically.
Think of this operation as an atomic version of { tmp = *atomic; *atomic = val; return tmp; }.
This call acts as a full compiler and hardware memory barrier.
Parameters
atomic | a pointer to a #gint or #guint |
newval | the value to replace with |
Returns
the value of atomic before the exchange, signed