[M3commit] CVS Update: cm3

[Antony Hosking]

CVSROOT:	/usr/cvs
Changes by:	hosking at birch.	08/11/24 22:06:28

Modified files:
	cm3/m3-libs/m3core/src/unix/darwin-generic/: Upthread.i3 

Log message:
	Add declaration for RWLOCK.