diff options
Diffstat (limited to 'lib/libkse/sys/lock.h')
| -rw-r--r-- | lib/libkse/sys/lock.h | 95 |
1 files changed, 0 insertions, 95 deletions
diff --git a/lib/libkse/sys/lock.h b/lib/libkse/sys/lock.h deleted file mode 100644 index 815e444..0000000 --- a/lib/libkse/sys/lock.h +++ /dev/null @@ -1,95 +0,0 @@ -/* - * Copyright (c) 2001, 2003 Daniel Eischen <deischen@freebsd.org>. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $FreeBSD$ - */ - -#ifndef _LOCK_H_ -#define _LOCK_H_ - -struct lockreq; -struct lockuser; -struct lock; - -enum lock_type { - LCK_DEFAULT = 0x0000, /* default is FIFO spin locks */ - LCK_PRIORITY = 0x0001, - LCK_ADAPTIVE = 0x0002 /* call user-supplied handlers */ -}; - -typedef void lock_handler_t(struct lock *, struct lockuser *); - -struct lock { - struct lockreq *l_head; - struct lockreq *l_tail; /* only used for priority locks */ - enum lock_type l_type; - lock_handler_t *l_wait; /* only used for adaptive locks */ - lock_handler_t *l_wakeup; /* only used for adaptive locks */ -}; - -/* Try to make this >= CACHELINESIZE */ -struct lockreq { - struct lockuser *lr_watcher; /* only used for priority locks */ - struct lockuser *lr_owner; /* only used for priority locks */ - volatile int lr_locked; /* lock granted = 0, busy otherwise */ - volatile int lr_active; /* non-zero if the lock is last lock for thread */ -}; - -struct lockuser { - struct lockreq *lu_myreq; /* request to give up/trade */ - struct lockreq *lu_watchreq; /* watch this request */ - int lu_priority; /* only used for priority locks */ - void *lu_private1; /* private{1,2} are initialized to */ - void *lu_private2; /* NULL and can be used by caller */ -#define lu_private lu_private1 -}; - -#define _LCK_INITIALIZER(lck_req) { &lck_req, NULL, LCK_DEFAULT, \ - NULL, NULL } -#define _LCK_REQUEST_INITIALIZER { 0, NULL, NULL, 0 } - -#define _LCK_BUSY(lu) ((lu)->lu_watchreq->lr_locked != 0) -#define _LCK_ACTIVE(lu) ((lu)->lu_watchreq->lr_active != 0) -#define _LCK_GRANTED(lu) ((lu)->lu_watchreq->lr_locked == 3) - -#define _LCK_SET_PRIVATE(lu, p) (lu)->lu_private = (void *)(p) -#define _LCK_GET_PRIVATE(lu) (lu)->lu_private -#define _LCK_SET_PRIVATE2(lu, p) (lu)->lu_private2 = (void *)(p) -#define _LCK_GET_PRIVATE2(lu) (lu)->lu_private2 - -void _lock_acquire(struct lock *, struct lockuser *, int); -void _lock_destroy(struct lock *); -void _lock_grant(struct lock *, struct lockuser *); -int _lock_init(struct lock *, enum lock_type, - lock_handler_t *, lock_handler_t *, void *(size_t, size_t)); -int _lock_reinit(struct lock *, enum lock_type, - lock_handler_t *, lock_handler_t *); -void _lock_release(struct lock *, struct lockuser *); -int _lockuser_init(struct lockuser *lu, void *priv); -void _lockuser_destroy(struct lockuser *lu); -int _lockuser_reinit(struct lockuser *lu, void *priv); -void _lockuser_setactive(struct lockuser *lu, int active); - -#endif |
