Module Name:	pkgsrc
Committed By:	agc
Date:		Sat Jan 19 21:29:42 UTC 2002

Modified Files:
	pkgsrc/mk: bsd.pkg.defaults.mk bsd.pkg.mk defs.Darwin.mk defs.Linux.mk
	    defs.NetBSD.mk defs.SunOS.mk

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 -r1.32 -r1.33 pkgsrc/mk/bsd.pkg.defaults.mk
cvs rdiff -r1.906 -r1.907 pkgsrc/mk/bsd.pkg.mk
cvs rdiff -r1.16 -r1.17 pkgsrc/mk/defs.Darwin.mk
cvs rdiff -r1.21 -r1.22 pkgsrc/mk/defs.Linux.mk
cvs rdiff -r1.19 -r1.20 pkgsrc/mk/defs.NetBSD.mk pkgsrc/mk/defs.SunOS.mk

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