/* Stub versions of mutex_lock_solid/mutex_unlock_solid for no -lthreads.
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/* If cthreads is linked in, it will define these functions itself to do
real cthreads mutex locks. This file will only be linked in when
cthreads is not used, and `mutexes' are in fact just spin locks (and
some unused storage). */
__mutex_lock_solid (void *lock)
__mutex_unlock_solid (void *lock)