Function

GLibatomic_pointer_add

since: 2.30

Declaration [src]

gintptr
g_atomic_pointer_add (
  void* atomic,
  gssize val
)

Description [src]

Atomically adds val to the value of atomic.

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.

Available since: 2.30

Parameters

atomic

Type: void*

A pointer to a #gpointer-sized value.

The data is owned by the caller of the function.

val

Type: gssize

The value to add.

Return value

Type: gintptr

The value of atomic before the add, signed.