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Annotation of src/lib/libpthread/pthread_types.h, Revision 1.1.2.4

1.1.2.4 ! nathanw     1: /*     $NetBSD: pthread_types.h,v 1.1.2.3 2001/07/24 21:28:11 nathanw Exp $    */
1.1.2.1   nathanw     2:
1.1.2.2   nathanw     3: /*-
                      4:  * Copyright (c) 2001 The NetBSD Foundation, Inc.
                      5:  * All rights reserved.
                      6:  *
                      7:  * This code is derived from software contributed to The NetBSD Foundation
                      8:  * by Nathan J. Williams.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *        This product includes software developed by the NetBSD
                     21:  *        Foundation, Inc. and its contributors.
                     22:  * 4. Neither the name of The NetBSD Foundation nor the names of its
                     23:  *    contributors may be used to endorse or promote products derived
                     24:  *    from this software without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
                     27:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
                     28:  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                     29:  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
                     30:  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
                     31:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
                     32:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
                     33:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
                     34:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
                     35:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
                     36:  * POSSIBILITY OF SUCH DAMAGE.
1.1.2.1   nathanw    37:  */
                     38:
                     39: #ifndef _LIB_PTHREAD_TYPES_H
                     40: #define _LIB_PTHREAD_TYPES_H
                     41:
                     42: #include <machine/lock.h>
                     43: #include "pthread_queue.h"
                     44:
                     45: typedef __cpu_simple_lock_t    pt_spin_t;
                     46:
                     47: PTQ_HEAD(pt_queue_t, pthread_st);
                     48:
                     49: struct pthread_st;
                     50: struct pthread_attr_st;
                     51: struct pthread_mutex_st;
                     52: struct pthread_mutexattr_st;
                     53: struct pthread_cond_st;
                     54: struct pthread_condattr_st;
                     55:
                     56: typedef struct pthread_st *pthread_t;
                     57: typedef struct pthread_attr_st pthread_attr_t;
                     58: typedef struct pthread_mutex_st pthread_mutex_t;
                     59: typedef struct pthread_mutexattr_st pthread_mutexattr_t;
                     60: typedef struct pthread_cond_st pthread_cond_t;
                     61: typedef struct pthread_condattr_st pthread_condattr_t;
                     62:
                     63:
                     64: struct pthread_attr_st {
                     65:        unsigned int    pta_magic;
                     66:
                     67:        int     pta_flags;
                     68: };
                     69:
                     70: struct pthread_mutex_st {
                     71:        unsigned int    ptm_magic;
                     72:
                     73:        /* Not a real spinlock; will never be spun on. Locked with
                     74:         * __cpu_simple_lock_try() or not at all. Therefore, not
                     75:         * subject to preempted-spinlock-continuation.
                     76:         *
                     77:         * Open research question: Would it help threaded applications if
                     78:         * preempted-lock-continuation were applied to mutexes?
                     79:         */
                     80:        pt_spin_t       ptm_lock;
                     81:
                     82:        /* Protects the owner and blocked queue */
                     83:        pt_spin_t       ptm_interlock;
                     84:        pthread_t       ptm_owner;
                     85:        struct pt_queue_t       ptm_blocked;
                     86: };
                     87:
1.1.2.3   nathanw    88: #define        _PT_MUTEX_MAGIC 0xCAFEFEED
                     89: #define        _PT_MUTEX_DEAD  0xFEEDDEAD
1.1.2.1   nathanw    90:
                     91: #define PTHREAD_MUTEX_INITIALIZER { PT_MUTEX_MAGIC,                    \
                     92:                                    __SIMPLELOCK_UNLOCKED,              \
                     93:                                    __SIMPLELOCK_UNLOCKED,              \
                     94:                                    NULL,                               \
                     95:                                    PTQ_HEAD_INITIALIZER                \
                     96:                                  }
                     97:
                     98:
                     99: struct pthread_mutexattr_st {
1.1.2.4 ! nathanw   100:        int     pad;
        !           101: };
        !           102:
        !           103:
        !           104: struct pthread_cond_st {
        !           105:        unsigned int    ptc_magic;
        !           106:
        !           107:        /* Protects the queue of waiters */
        !           108:        pt_spin_t       ptc_lock;
        !           109:        struct pt_queue_t       ptc_waiters;
        !           110:
        !           111:        pthread_mutex_t *ptc_mutex;     /* Current mutex */
        !           112: };
        !           113:
        !           114: #define        _PT_COND_MAGIC  0xCAFEC00D
        !           115: #define        _PT_COND_DEAD   0xDEADC00D
        !           116:
        !           117: struct pthread_condattr_st {
1.1.2.1   nathanw   118:        int     pad;
                    119: };
                    120:
                    121: #endif /* _LIB_PTHREAD_TYPES_H */