25 Jan
2006
25 Jan
'06
7:33 p.m.
One Harold Chu on LKML is insisting that POSIX requires
pthread_mutex_unlock to reschedule if other threads are waiting on the
mutex, and that even if the calling thread immediately tries to lock the
mutex again another thread must get it. I contend that both of these
assertions are wrong - first, I just don't read the standard that way,
and second, it would lead to obviously incorrect behavior - unlocking a
mutex would no longer be an RT safe operation. What would be the point
of trylock() in RT code if unlocking is going to cause a reschedule
anyway?
Can anyone back me up on this?
Lee