xmutex vs xlock

[Compro P. <com...@gm...>]

I don't see the point in having "xmutex_t" defined as "xlock_t" and
"xmutex_raw_t" defined as "pthread_mutex_t". I mean how is xmutex_t
related to xmutex_raw_t ? I see it as a redundant definition which
makes the real definition look clumsy.

Compro