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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/i386/ibcs2 | |
| 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/i386/ibcs2')
| -rw-r--r-- | sys/i386/ibcs2/ibcs2_ioctl.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/i386/ibcs2/ibcs2_ioctl.c b/sys/i386/ibcs2/ibcs2_ioctl.c index 2755b01..cb5d5ae 100644 --- a/sys/i386/ibcs2/ibcs2_ioctl.c +++ b/sys/i386/ibcs2/ibcs2_ioctl.c @@ -552,6 +552,7 @@ ibcs2_ioctl(td, uap) } ibcs2_jwinsize; PROC_LOCK(p); + SESS_LOCK(p->p_session); ibcs2_jwinsize.bytex = 80; /* p->p_session->s_ttyp->t_winsize.ws_col; XXX */ ibcs2_jwinsize.bytey = 25; @@ -560,6 +561,7 @@ ibcs2_ioctl(td, uap) p->p_session->s_ttyp->t_winsize.ws_xpixel; ibcs2_jwinsize.bity = p->p_session->s_ttyp->t_winsize.ws_ypixel; + SESS_UNLOCK(p->p_session); PROC_UNLOCK(p); error = copyout((caddr_t)&ibcs2_jwinsize, SCARG(uap, data), sizeof(ibcs2_jwinsize)); |
