A #GStaticRecMutex works like a #GStaticMutex, but it can be locked multiple times by one thread. If you enter it n times, you have to unlock it n times again to let other threads lock it. An exception is the function glib.static_rec_mutex.StaticRecMutex.unlockFull: that allows you to unlock a #GStaticRecMutex completely returning the depth, (i.e. the number of times this mutex was locked). The depth can later be used to restore the state of the #GStaticRecMutex by calling glib.static_rec_mutex.StaticRecMutex.lockFull. In GLib 2.32, #GStaticRecMutex has been deprecated in favor of #GRecMutex.