* Atomic operations do not require locking, but they are not very powerful.
*/
+/** Static initializer for \ref vlc_atomic_t */
+# define VLC_ATOMIC_INIT(val) { (val) }
+
/* All functions return the atom value _after_ the operation. */
-VLC_EXPORT(uintptr_t, vlc_atomic_get, (const vlc_atomic_t *));
-VLC_EXPORT(uintptr_t, vlc_atomic_set, (vlc_atomic_t *, uintptr_t));
-VLC_EXPORT(uintptr_t, vlc_atomic_add, (vlc_atomic_t *, uintptr_t));
+VLC_API uintptr_t vlc_atomic_get(const vlc_atomic_t *);
+VLC_API uintptr_t vlc_atomic_set(vlc_atomic_t *, uintptr_t);
+VLC_API uintptr_t vlc_atomic_add(vlc_atomic_t *, uintptr_t);
static inline uintptr_t vlc_atomic_sub (vlc_atomic_t *atom, uintptr_t v)
{
return vlc_atomic_sub (atom, 1);
}
-VLC_EXPORT(uintptr_t, vlc_atomic_swap, (vlc_atomic_t *, uintptr_t));
-VLC_EXPORT(uintptr_t, vlc_atomic_compare_swap, (vlc_atomic_t *, uintptr_t, uintptr_t));
+VLC_API uintptr_t vlc_atomic_swap(vlc_atomic_t *, uintptr_t);
+VLC_API uintptr_t vlc_atomic_compare_swap(vlc_atomic_t *, uintptr_t, uintptr_t);
+
+/** Helper to retrieve a single precision from an atom. */
+static inline float vlc_atomic_getf(const vlc_atomic_t *atom)
+{
+ union { float f; uintptr_t i; } u;
+ u.i = vlc_atomic_get(atom);
+ return u.f;
+}
+
+/** Helper to store a single precision into an atom. */
+static inline float vlc_atomic_setf(vlc_atomic_t *atom, float f)
+{
+ union { float f; uintptr_t i; } u;
+ u.f = f;
+ vlc_atomic_set(atom, u.i);
+ return f;
+}
#endif