/*
- * Copyright (c) 2004 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2004-2007 Apple Inc. All rights reserved.
*
- * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. The rights granted to you under the
- * License may not be used to create, or enable the creation or
- * redistribution of, unlawful or unlicensed copies of an Apple operating
- * system, or to circumvent, violate, or enable the circumvention or
- * violation of, any terms of an Apple operating system software license
- * agreement.
- *
- * Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
* limitations under the License.
- *
- * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
+ *
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#ifndef _I386_LOCKS_H_
} lck_mtxd;
struct {
unsigned int lck_mtxi_tag;
- struct _lck_mtx_ext_ *lck_mtxi_ptr;
+ struct _lck_mtx_ext_ *lck_mtxi_ptr;
unsigned int lck_mtxi_pad8;
} lck_mtxi;
} lck_mtx_sw;
#define LCK_MTX_TAG_INDIRECT 0x00001007 /* lock marked as Indirect */
#define LCK_MTX_TAG_DESTROYED 0x00002007 /* lock marked as Destroyed */
+#define MUTEX_LOCKED_AS_SPIN 0x00004001 /* used to indicate that the mutex */
+ /* was acquired as a spin lock - stored in lck_mtxd_locked */
/* Adaptive spin before blocking */
extern unsigned int MutexSpin;
-extern void lck_mtx_lock_spin(lck_mtx_t *lck);
+extern void lck_mtx_lock_spinwait(lck_mtx_t *lck);
+
+extern void lck_mtx_interlock_panic(lck_mtx_t *lck);
-extern void lck_mtx_interlock_spin(lck_mtx_t *lck);
+extern void hw_lock_byte_init(uint8_t *lock_byte);
+extern void hw_lock_byte_lock(uint8_t *lock_byte);
+extern void hw_lock_byte_unlock(uint8_t *lock_byte);
typedef struct {
unsigned int type;
struct _lck_grp_ *lck_mtx_grp;
unsigned int lck_mtx_attr;
lck_mtx_deb_t lck_mtx_deb;
- lck_mtx_stat_t lck_mtx_stat;
+ uint64_t lck_mtx_stat;
} lck_mtx_ext_t;
#define LCK_MTX_ATTR_DEBUG 0x1
#endif
#ifdef MACH_KERNEL_PRIVATE
+#pragma pack(1) /* Make sure the structure stays as we defined it */
typedef struct {
- hw_lock_data_t interlock;
- volatile unsigned int
- read_count:16, /* No. of accepted readers */
- want_upgrade:1, /* Read-to-write upgrade waiting */
- want_write:1, /* Writer waiting or locked for write */
- waiting:1, /* Someone is sleeping on lock */
- can_sleep:1, /* Can attempts to lock go to sleep? */
- read_priority:1;/* New read takes piority over write */
- unsigned int lck_rw_tag;
+ volatile uint16_t lck_rw_shared_count; /* No. of accepted readers */
+ uint8_t lck_rw_interlock; /* Interlock byte */
+ volatile uint8_t
+ lck_rw_priv_excl:1, /* Writers prioritized if set */
+ lck_rw_want_upgrade:1, /* Read-to-write upgrade waiting */
+ lck_rw_want_write:1, /* Writer waiting or locked for write */
+ lck_r_waiting:1, /* Reader is sleeping on lock */
+ lck_w_waiting:1, /* Writer is sleeping on lock */
+ lck_rw_can_sleep:1, /* Can attempts to lock go to sleep? */
+ lck_rw_pad6:2; /* padding */
+
+ unsigned int lck_rw_tag; /* This can be obsoleted when stats
+ * are in
+ */
+ unsigned int lck_rw_pad8;
} lck_rw_t;
+#pragma pack()
#define LCK_RW_ATTR_DEBUG 0x1
#define LCK_RW_ATTR_DEBUGb 0
projects / apple / xnu.git / blobdiff