163 lines
4.4 KiB
C
163 lines
4.4 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_SYNCH_H
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#define _SYS_SYNCH_H
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#pragma ident "%Z%%M% %I% %E% SMI"
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#ifndef _ASM
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#include <sys/types.h>
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#include <sys/int_types.h>
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#endif /* _ASM */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifndef _ASM
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/*
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* Thread and LWP mutexes have the same type
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* definitions.
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*
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* NOTE:
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*
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* POSIX requires that <pthread.h> define the structures pthread_mutex_t
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* and pthread_cond_t. Although these structures are identical to mutex_t
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* (lwp_mutex_t) and cond_t (lwp_cond_t), defined here, a typedef of these
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* types would require including <synch.h> in <pthread.h>, pulling in
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* non-posix symbols/constants, violating POSIX namespace restrictions. Hence,
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* pthread_mutex_t/pthread_cond_t have been redefined (in <sys/types.h>).
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* Any modifications done to mutex_t/lwp_mutex_t or cond_t/lwp_cond_t must
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* also be done to pthread_mutex_t/pthread_cond_t.
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*/
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typedef struct _lwp_mutex {
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struct {
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uint16_t flag1;
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uint8_t flag2;
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uint8_t ceiling;
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union {
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uint16_t bcptype;
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struct {
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uint8_t count_type1;
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uint8_t count_type2;
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} mtype_rcount;
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} mbcp_type_un;
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uint16_t magic;
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} flags;
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union {
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struct {
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uint8_t pad[8];
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} lock64;
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struct {
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uint32_t ownerpid;
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uint32_t lockword;
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} lock32;
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upad64_t owner64;
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} lock;
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upad64_t data;
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} lwp_mutex_t;
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/*
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* Thread and LWP condition variables have the same
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* type definition.
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* NOTE:
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* The layout of the following structure should be kept in sync with the
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* layout of pthread_cond_t in sys/types.h. See NOTE above for lwp_mutex_t.
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*/
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typedef struct _lwp_cond {
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struct {
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uint8_t flag[4];
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uint16_t type;
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uint16_t magic;
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} flags;
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upad64_t data;
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} lwp_cond_t;
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/*
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* LWP semaphores
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*/
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typedef struct _lwp_sema {
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uint32_t count; /* semaphore count */
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uint16_t type;
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uint16_t magic;
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uint8_t flags[8]; /* last byte reserved for waiters */
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upad64_t data; /* optional data */
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} lwp_sema_t;
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/*
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* Thread and LWP rwlocks have the same type definition.
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* NOTE: The layout of this structure should be kept in sync with the layout
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* of the correponding structure of pthread_rwlock_t in sys/types.h.
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* Also, because we have to deal with C++, there is an identical structure
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* for rwlock_t in head/sync.h that we cannot change.
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*/
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typedef struct _lwp_rwlock {
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int32_t readers; /* rwstate word */
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uint16_t type;
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uint16_t magic;
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lwp_mutex_t mutex; /* used with process-shared rwlocks */
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lwp_cond_t readercv; /* used only to indicate ownership */
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lwp_cond_t writercv; /* used only to indicate ownership */
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} lwp_rwlock_t;
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#endif /* _ASM */
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/*
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* Definitions of synchronization types.
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*/
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#define USYNC_THREAD 0x00 /* private to a process */
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#define USYNC_PROCESS 0x01 /* shared by processes */
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/* Keep the following values in sync with pthread.h */
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#define LOCK_NORMAL 0x00 /* same as USYNC_THREAD */
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#define LOCK_SHARED 0x01 /* same as USYNC_PROCESS */
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#define LOCK_ERRORCHECK 0x02 /* error check lock */
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#define LOCK_RECURSIVE 0x04 /* recursive lock */
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#define LOCK_PRIO_INHERIT 0x10 /* priority inheritance lock */
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#define LOCK_PRIO_PROTECT 0x20 /* priority ceiling lock */
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#define LOCK_ROBUST 0x40 /* robust lock */
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/*
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* USYNC_PROCESS_ROBUST is a deprecated historical type. It is mapped
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* into (USYNC_PROCESS | LOCK_ROBUST) by mutex_init(). Application code
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* should be revised to use (USYNC_PROCESS | LOCK_ROBUST) rather than this.
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*/
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#define USYNC_PROCESS_ROBUST 0x08
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/*
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* lwp_mutex_t flags
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*/
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#define LOCK_OWNERDEAD 0x1
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#define LOCK_NOTRECOVERABLE 0x2
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#define LOCK_INITED 0x4
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#define LOCK_UNMAPPED 0x8
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_SYNCH_H */
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