This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / fs / xfs / linux-2.6 / sv.h

diff --git a/fs/xfs/linux-2.6/sv.h b/fs/xfs/linux-2.6/sv.h
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+++ b/fs/xfs/linux-2.6/sv.h
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+/*
+ * Copyright (c) 2000-2002 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef __XFS_SUPPORT_SV_H__
+#define __XFS_SUPPORT_SV_H__
+
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+
+/*
+ * Synchronisation variables.
+ *
+ * (Parameters "pri", "svf" and "rts" are not implemented)
+ */
+
+typedef struct sv_s {
+       wait_queue_head_t waiters;
+} sv_t;
+
+#define SV_FIFO                0x0             /* sv_t is FIFO type */
+#define SV_LIFO                0x2             /* sv_t is LIFO type */
+#define SV_PRIO                0x4             /* sv_t is PRIO type */
+#define SV_KEYED       0x6             /* sv_t is KEYED type */
+#define SV_DEFAULT      SV_FIFO
+
+
+static inline void _sv_wait(sv_t *sv, spinlock_t *lock, int state,
+                            unsigned long timeout)
+{
+       DECLARE_WAITQUEUE(wait, current);
+
+       add_wait_queue_exclusive(&sv->waiters, &wait);
+       __set_current_state(state);
+       spin_unlock(lock);
+
+       schedule_timeout(timeout);
+
+       remove_wait_queue(&sv->waiters, &wait);
+}
+
+#define init_sv(sv,type,name,flag) \
+       init_waitqueue_head(&(sv)->waiters)
+#define sv_init(sv,flag,name) \
+       init_waitqueue_head(&(sv)->waiters)
+#define sv_destroy(sv) \
+       /*NOTHING*/
+#define sv_wait(sv, pri, lock, s) \
+       _sv_wait(sv, lock, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT)
+#define sv_wait_sig(sv, pri, lock, s)   \
+       _sv_wait(sv, lock, TASK_INTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT)
+#define sv_timedwait(sv, pri, lock, s, svf, ts, rts) \
+       _sv_wait(sv, lock, TASK_UNINTERRUPTIBLE, timespec_to_jiffies(ts))
+#define sv_timedwait_sig(sv, pri, lock, s, svf, ts, rts) \
+       _sv_wait(sv, lock, TASK_INTERRUPTIBLE, timespec_to_jiffies(ts))
+#define sv_signal(sv) \
+       wake_up(&(sv)->waiters)
+#define sv_broadcast(sv) \
+       wake_up_all(&(sv)->waiters)
+
+#endif /* __XFS_SUPPORT_SV_H__ */