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Re: OTMP & MPRemoteCalls
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Re: OTMP & MPRemoteCalls

At 17:04 -0500 4/12/03, Steve Kalkwarf wrote:
I took a whirl through my project's source, and discovered that OTMP.c
passes kMPAnyContext to its MPRemoteCall()s.

Is this actually a problem?

No, and yes.

No, in that Mac OS X ignores the actual value of the context parameter to MPRemoteCall and always operates as if kMPOwningProcessRemoteContext had been supplied.

Yes, in that you shouldn't be running that branch of the OTMP code on Mac OS X. OTMP has two parallel sets of routines, those with the OTMP prefix and those with the OTMPX prefix. The OTMP routines are *strictly* for traditional Mac OS. The OTMPX routines are the routines you should be using on Mac OS X. The OTMPX routines will dispatch to either OTMP, if you're running on traditional Mac OS, or real OT, if you're running on Mac OS X.

Executing the OTMP routines is bad because the synchronisation model that they use only works if interrupts run to completion (which isn't true on Mac OS X).

S+E
--
Quinn "The Eskimo!" <http://www.apple.com/developer/>
Apple Developer Technical Support * Networking, Communications, Hardware
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