/**
* g_datalist_set_flags:
* @datalist: pointer to the location that holds a list
* @flags: the flags to turn on. The values of the flags are
* restricted by %G_DATALIST_FLAGS_MASK (currently
* 3; giving two possible boolean flags).
* A value for @flags that doesn't fit within the mask is
* an error.
*
* Turns on flag values for a data list. This function is used
* to keep a small number of boolean flags in an object with
* a data list without using any additional space. It is
* not generally useful except in circumstances where space
* is very tight. (It is used in the base #GObject type, for
* example.)
*
* Since: 2.8
**/
void
g_datalist_set_flags (GData **datalist,
guint flags)
{
g_return_if_fail (datalist != NULL);
g_return_if_fail ((flags & ~G_DATALIST_FLAGS_MASK) == 0);
g_atomic_pointer_or (datalist, (gsize)flags);
}
/**
* g_atomic_pointer_or:
* @atomic: a pointer to a #gpointer-sized value
* @val: the value to 'or'
*
* Performs an atomic bitwise 'or' of the value of @atomic and @val,
* storing the result back in @atomic.
*
* Think of this operation as an atomic version of
* <literal>{ tmp = *atomic; *@atomic |= @val; return tmp; }</literal>
*
* This call acts as a full compiler and hardware memory barrier.
*
* Returns: the value of @atomic before the operation, unsigned
*
* Since: 2.30
**/
gsize
(g_atomic_pointer_or) (volatile void *atomic,
gsize val)
{
return g_atomic_pointer_or ((volatile gpointer *) atomic, val);
}
