/* * 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 #include #include /* * 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__ */