+GLIB_AVAILABLE_IN_ALL
+void g_pointer_bit_lock (volatile void *address,
+ gint lock_bit);
+GLIB_AVAILABLE_IN_ALL
+gboolean g_pointer_bit_trylock (volatile void *address,
+ gint lock_bit);
+GLIB_AVAILABLE_IN_ALL
+void g_pointer_bit_unlock (volatile void *address,
+ gint lock_bit);
+
+#ifdef __GNUC__
+
+#define g_pointer_bit_lock(address, lock_bit) \
+ (G_GNUC_EXTENSION ({ \
+ G_STATIC_ASSERT (sizeof *(address) == sizeof (gpointer)); \
+ g_pointer_bit_lock ((address), (lock_bit)); \
+ }))
+
+#define g_pointer_bit_trylock(address, lock_bit) \
+ (G_GNUC_EXTENSION ({ \
+ G_STATIC_ASSERT (sizeof *(address) == sizeof (gpointer)); \
+ g_pointer_bit_trylock ((address), (lock_bit)); \
+ }))
+
+#define g_pointer_bit_unlock(address, lock_bit) \
+ (G_GNUC_EXTENSION ({ \
+ G_STATIC_ASSERT (sizeof *(address) == sizeof (gpointer)); \
+ g_pointer_bit_unlock ((address), (lock_bit)); \
+ }))
+
+#endif
+