[M3commit] CVS Update: cm3

[Antony Hosking]

CVSROOT:	/usr/cvs
Changes by:	hosking at birch.	07/07/29 19:24:41

Modified files:
	cm3/m3-libs/m3core/src/thread/PTHREAD/: ThreadPThread.m3 

Log message:
	Eliminate cache for idle threads -- just let them die.  This simplifies
	debugging of threads using gdb since there are only as many system threads as
	live M3 threads.
	
	Clean up state changes for better @M3showthread behavior -- this now works and
	can be used to visualize thread execution in support of debugging.
	
	Send SIGIO signal in Alert to thread being alerted in case it is stuck on a
	select call.
	
	[Unfortunately none of these changes appear to fix the hangs of mentor running
	on Darwin -- need to see if this problem is also present on non-Darwin
	(Linux/Solaris) pthreads platforms.  Assistance diagnosing the mentor problems
	on Darwin would be appreciated.  For now, it appears that the thread listening
	for X events is alive and responsive, but other threads appear to be stuck
	waiting on mutexes.]