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.
While atomic has a volatile qualifier, this is a historical artifact and
the pointer passed to it should not be volatile.
In GLib 2.80, the return type was changed from gssize to gintptr to add
support for platforms with 128-bit pointers. This should not affect existing
code.
Atomically adds
valto the value ofatomic.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.
While
atomichas avolatilequalifier, this is a historical artifact and the pointer passed to it should not bevolatile.In GLib 2.80, the return type was changed from
gssizetogintptrto add support for platforms with 128-bit pointers. This should not affect existing code.