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| author | tanimura <tanimura@FreeBSD.org> | 2002-02-23 11:12:57 +0000 |
|---|---|---|
| committer | tanimura <tanimura@FreeBSD.org> | 2002-02-23 11:12:57 +0000 |
| commit | a09da298590e8c11ebafa37f79e0046814665237 (patch) | |
| tree | 2289c653c0f7aa23498f82b603c33107952652ec /sys/kern/tty_subr.c | |
| parent | 33e8ee5265ca2838260ab581a9cebdedb1e1e29b (diff) | |
| download | FreeBSD-src-a09da298590e8c11ebafa37f79e0046814665237.zip FreeBSD-src-a09da298590e8c11ebafa37f79e0046814665237.tar.gz | |
Lock struct pgrp, session and sigio.
New locks are:
- pgrpsess_lock which locks the whole pgrps and sessions,
- pg_mtx which protects the pgrp members, and
- s_mtx which protects the session members.
Please refer to sys/proc.h for the coverage of these locks.
Changes on the pgrp/session interface:
- pgfind() needs the pgrpsess_lock held.
- The caller of enterpgrp() is responsible to allocate a new pgrp and
session.
- Call enterthispgrp() in order to enter an existing pgrp.
- pgsignal() requires a pgrp lock held.
Reviewed by: jhb, alfred
Tested on: cvsup.jp.FreeBSD.org
(which is a quad-CPU machine running -current)
Diffstat (limited to 'sys/kern/tty_subr.c')
0 files changed, 0 insertions, 0 deletions
