K 10
svn:author
V 7
davidxu
K 8
svn:date
V 27
2010-01-13T08:53:23.455049Z
K 7
svn:log
V 153
Return SEM_FAILED instead of NULL, though there are same, but the
SEM_FAILED is more suitable name.
In function, sem_close(), always set errno on error.

END