Module Name:	doc
Committed By:	agc
Date:		Sat Jan 19 21:33:56 UTC 2002

Modified Files:
	doc: pkg-CHANGES

Log Message:
Add coarse-grained locking to pkgsrc builds, by means of a beefed
up version of the bare-bones code in PR 7590, from David Maxwell.

The definition governing the type of locking used is PKGSRC_LOCKTYPE,
which can take any of the values "none", "sleep", and "once".  The
default is "none".  If "sleep" locking is used, and process A is
building a package, when process B attempts to build the same package,
process B will sleep for PKGSRC_SLEEPSECS seconds, and attempt to grab
the lock again.

Coarse-grained locking uses the OBJHOSTNAME definition to ensure that
the PID space is regular for shlock(1) to do its work.  The
pkgsrc/pkgtools/shlock package has been provided for environments
where shlock is not standard.


To generate a diff of this commit:
cvs rdiff -r1.5818 -r1.5819 doc/pkg-CHANGES

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.