Function

GLibatomic_int_exchange

Declaration

gint
g_atomic_int_exchange (
  gint* atomic,
  gint newval
)

Description

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.

Available since:2.74

Parameters

atomic

Type: gint*

A pointer to a #gint or #guint.

The data is owned by the caller of the function.
newval

Type: gint

The value to replace with.

Return value

Type: gint

The value of atomic before the exchange, signed.