| lock.h (66354) | lock.h (66615) |
|---|---|
| 1/* 2 * Copyright (c) 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code contains ideas from software contributed to Berkeley by 6 * Avadis Tevanian, Jr., Michael Wayne Young, and the Mach Operating 7 * System project at Carnegie-Mellon University. 8 * --- 21 unchanged lines hidden (view full) --- 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)lock.h 8.12 (Berkeley) 5/19/95 | 1/* 2 * Copyright (c) 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code contains ideas from software contributed to Berkeley by 6 * Avadis Tevanian, Jr., Michael Wayne Young, and the Mach Operating 7 * System project at Carnegie-Mellon University. 8 * --- 21 unchanged lines hidden (view full) --- 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * @(#)lock.h 8.12 (Berkeley) 5/19/95 |
| 38 * $FreeBSD: head/sys/sys/lock.h 66354 2000-09-25 15:04:15Z bp $ | 38 * $FreeBSD: head/sys/sys/lock.h 66615 2000-10-04 01:29:17Z jasone $ |
| 39 */ 40 41#ifndef _LOCK_H_ 42#define _LOCK_H_ 43 | 39 */ 40 41#ifndef _LOCK_H_ 42#define _LOCK_H_ 43 |
| 44 | |
| 45#include <machine/lock.h> | 44#include <machine/lock.h> |
| 45#include <machine/mutex.h> |
|
| 46 47/* 48 * The general lock structure. Provides for multiple shared locks, 49 * upgrading from shared to exclusive, and sleeping until the lock 50 * can be gained. The simple locks are defined in <machine/param.h>. 51 */ 52struct lock { | 46 47/* 48 * The general lock structure. Provides for multiple shared locks, 49 * upgrading from shared to exclusive, and sleeping until the lock 50 * can be gained. The simple locks are defined in <machine/param.h>. 51 */ 52struct lock { |
| 53 struct simplelock lk_interlock; /* lock on remaining fields */ | 53 struct mtx lk_interlock; /* lock on remaining fields */ 54 struct mtxf lk_pad; /* padding to keep sizeof constant */ |
| 54 u_int lk_flags; /* see below */ 55 int lk_sharecount; /* # of accepted shared locks */ 56 int lk_waitcount; /* # of processes sleeping for lock */ 57 short lk_exclusivecount; /* # of recursive exclusive locks */ 58 short lk_prio; /* priority at which to sleep */ 59 char *lk_wmesg; /* resource sleeping (for tsleep) */ 60 int lk_timo; /* maximum sleep time (for tsleep) */ 61 pid_t lk_lockholder; /* pid of exclusive lock holder */ --- 65 unchanged lines hidden (view full) --- 127 * 128 * These flags are used internally to the lock manager. 129 */ 130#define LK_WANT_UPGRADE 0x00000100 /* waiting for share-to-excl upgrade */ 131#define LK_WANT_EXCL 0x00000200 /* exclusive lock sought */ 132#define LK_HAVE_EXCL 0x00000400 /* exclusive lock obtained */ 133#define LK_WAITDRAIN 0x00000800 /* process waiting for lock to drain */ 134#define LK_DRAINING 0x00004000 /* lock is being drained */ | 55 u_int lk_flags; /* see below */ 56 int lk_sharecount; /* # of accepted shared locks */ 57 int lk_waitcount; /* # of processes sleeping for lock */ 58 short lk_exclusivecount; /* # of recursive exclusive locks */ 59 short lk_prio; /* priority at which to sleep */ 60 char *lk_wmesg; /* resource sleeping (for tsleep) */ 61 int lk_timo; /* maximum sleep time (for tsleep) */ 62 pid_t lk_lockholder; /* pid of exclusive lock holder */ --- 65 unchanged lines hidden (view full) --- 128 * 129 * These flags are used internally to the lock manager. 130 */ 131#define LK_WANT_UPGRADE 0x00000100 /* waiting for share-to-excl upgrade */ 132#define LK_WANT_EXCL 0x00000200 /* exclusive lock sought */ 133#define LK_HAVE_EXCL 0x00000400 /* exclusive lock obtained */ 134#define LK_WAITDRAIN 0x00000800 /* process waiting for lock to drain */ 135#define LK_DRAINING 0x00004000 /* lock is being drained */ |
| 136#define LK_VALID 0x00008000 /* 137 * Lock is initialized. This is a 138 * temporary hack to support vfs 139 * layering. 140 */ |
|
| 135/* 136 * Control flags 137 * 138 * Non-persistent external flags. 139 */ | 141/* 142 * Control flags 143 * 144 * Non-persistent external flags. 145 */ |
| 140#define LK_INTERLOCK 0x00010000 /* unlock passed simple lock after 141 getting lk_interlock */ | 146#define LK_INTERLOCK 0x00010000 /* 147 * unlock passed mutex after getting 148 * lk_interlock 149 */ |
| 142#define LK_RETRY 0x00020000 /* vn_lock: retry until locked */ 143#define LK_NOOBJ 0x00040000 /* vget: don't create object */ 144#define LK_THISLAYER 0x00080000 /* vn_lock: lock/unlock only current layer */ 145 146/* 147 * Internal state flags corresponding to lk_sharecount, and lk_waitcount 148 */ 149#define LK_SHARE_NONZERO 0x00100000 --- 22 unchanged lines hidden (view full) --- 172#define LK_KERNPROC ((pid_t) -2) 173#define LK_NOPROC ((pid_t) -1) 174 175void dumplockinfo(struct lock *lkp); 176struct proc; 177 178void lockinit __P((struct lock *, int prio, char *wmesg, int timo, 179 int flags)); | 150#define LK_RETRY 0x00020000 /* vn_lock: retry until locked */ 151#define LK_NOOBJ 0x00040000 /* vget: don't create object */ 152#define LK_THISLAYER 0x00080000 /* vn_lock: lock/unlock only current layer */ 153 154/* 155 * Internal state flags corresponding to lk_sharecount, and lk_waitcount 156 */ 157#define LK_SHARE_NONZERO 0x00100000 --- 22 unchanged lines hidden (view full) --- 180#define LK_KERNPROC ((pid_t) -2) 181#define LK_NOPROC ((pid_t) -1) 182 183void dumplockinfo(struct lock *lkp); 184struct proc; 185 186void lockinit __P((struct lock *, int prio, char *wmesg, int timo, 187 int flags)); |
| 188void lockdestroy __P((struct lock *)); 189 |
|
| 180#ifdef DEBUG_LOCKS 181int debuglockmgr __P((struct lock *, u_int flags, | 190#ifdef DEBUG_LOCKS 191int debuglockmgr __P((struct lock *, u_int flags, |
| 182 struct simplelock *, struct proc *p, | 192 struct mtx *, struct proc *p, |
| 183 const char *, 184 const char *, 185 int)); 186#define lockmgr(lockp, flags, slockp, proc) \ 187 debuglockmgr((lockp), (flags), (slockp), (proc), \ 188 "lockmgr", __FILE__, __LINE__) 189#else 190int lockmgr __P((struct lock *, u_int flags, | 193 const char *, 194 const char *, 195 int)); 196#define lockmgr(lockp, flags, slockp, proc) \ 197 debuglockmgr((lockp), (flags), (slockp), (proc), \ 198 "lockmgr", __FILE__, __LINE__) 199#else 200int lockmgr __P((struct lock *, u_int flags, |
| 191 struct simplelock *, struct proc *p)); | 201 struct mtx *, struct proc *p)); |
| 192#endif 193void lockmgr_printinfo __P((struct lock *)); 194int lockstatus __P((struct lock *, struct proc *)); 195int lockcount __P((struct lock *)); 196 197#ifdef SIMPLELOCK_DEBUG 198void _simple_unlock __P((struct simplelock *alp, const char *, int)); 199#define simple_unlock(alp) _simple_unlock(alp, __FILE__, __LINE__) --- 16 unchanged lines hidden --- | 202#endif 203void lockmgr_printinfo __P((struct lock *)); 204int lockstatus __P((struct lock *, struct proc *)); 205int lockcount __P((struct lock *)); 206 207#ifdef SIMPLELOCK_DEBUG 208void _simple_unlock __P((struct simplelock *alp, const char *, int)); 209#define simple_unlock(alp) _simple_unlock(alp, __FILE__, __LINE__) --- 16 unchanged lines hidden --- |