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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS_SYNCH_H
#define _SYS_SYNCH_H
#pragma ident "%Z%%M% %I% %E% SMI"
#ifndef _ASM
#include <sys/types.h>
#include <sys/int_types.h>
#endif /* _ASM */
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _ASM
/*
* Thread and LWP mutexes have the same type
* definitions.
*
* NOTE:
*
* POSIX requires that <pthread.h> define the structures pthread_mutex_t
* and pthread_cond_t. Although these structures are identical to mutex_t
* (lwp_mutex_t) and cond_t (lwp_cond_t), defined here, a typedef of these
* types would require including <synch.h> in <pthread.h>, pulling in
* non-posix symbols/constants, violating POSIX namespace restrictions. Hence,
* pthread_mutex_t/pthread_cond_t have been redefined (in <sys/types.h>).
* Any modifications done to mutex_t/lwp_mutex_t or cond_t/lwp_cond_t must
* also be done to pthread_mutex_t/pthread_cond_t.
*/
typedef struct _lwp_mutex {
struct {
uint16_t flag1;
uint8_t flag2;
uint8_t ceiling;
union {
uint16_t bcptype;
struct {
uint8_t count_type1;
uint8_t count_type2;
} mtype_rcount;
} mbcp_type_un;
uint16_t magic;
} flags;
union {
struct {
uint8_t pad[8];
} lock64;
struct {
uint32_t ownerpid;
uint32_t lockword;
} lock32;
upad64_t owner64;
} lock;
upad64_t data;
} lwp_mutex_t;
/*
* Thread and LWP condition variables have the same
* type definition.
* NOTE:
* The layout of the following structure should be kept in sync with the
* layout of pthread_cond_t in sys/types.h. See NOTE above for lwp_mutex_t.
*/
typedef struct _lwp_cond {
struct {
uint8_t flag[4];
uint16_t type;
uint16_t magic;
} flags;
upad64_t data;
} lwp_cond_t;
/*
* LWP semaphores
*/
typedef struct _lwp_sema {
uint32_t count; /* semaphore count */
uint16_t type;
uint16_t magic;
uint8_t flags[8]; /* last byte reserved for waiters */
upad64_t data; /* optional data */
} lwp_sema_t;
/*
* Thread and LWP rwlocks have the same type definition.
* NOTE: The layout of this structure should be kept in sync with the layout
* of the correponding structure of pthread_rwlock_t in sys/types.h.
* Also, because we have to deal with C++, there is an identical structure
* for rwlock_t in head/sync.h that we cannot change.
*/
typedef struct _lwp_rwlock {
int32_t readers; /* -1 == writer else # of readers */
uint16_t type;
uint16_t magic;
lwp_mutex_t mutex; /* used to indicate ownership */
lwp_cond_t readercv; /* unused */
lwp_cond_t writercv; /* unused */
} lwp_rwlock_t;
#endif /* _ASM */
/*
* Definitions of synchronization types.
*/
#define USYNC_THREAD 0x00 /* private to a process */
#define USYNC_PROCESS 0x01 /* shared by processes */
/* Keep the following 3 fields in sync with pthread.h */
#define LOCK_NORMAL 0x00 /* same as USYNC_THREAD */
#define LOCK_ERRORCHECK 0x02 /* error check lock */
#define LOCK_RECURSIVE 0x04 /* recursive lock */
#define USYNC_PROCESS_ROBUST 0x08 /* shared by processes robustly */
/* Keep the following 5 fields in sync with pthread.h */
#define LOCK_PRIO_NONE 0x00
#define LOCK_PRIO_INHERIT 0x10
#define LOCK_PRIO_PROTECT 0x20
#define LOCK_STALL_NP 0x00
#define LOCK_ROBUST_NP 0x40
/*
* lwp_mutex_t flags
*/
#define LOCK_OWNERDEAD 0x1
#define LOCK_NOTRECOVERABLE 0x2
#define LOCK_INITED 0x4
#define LOCK_UNMAPPED 0x8
#ifdef __cplusplus
}
#endif
#endif /* _SYS_SYNCH_H */
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