projects / unix-history / blame
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|---|---|---|
| 90269d47 AM |
1 | /* ==== cond.h ============================================================ |
| 2 | * Copyright (c) 1993 by Chris Provenzano, proven@athena.mit.edu | |
| 3 | * | |
| 4 | * Description : mutex header. | |
| 5 | * | |
| 6 | * 1.00 93/10/30 proven | |
| 7 | * -Started coding this file. | |
| 8 | */ | |
| 9 | ||
| 30b08b75 AM |
10 | /* |
| 11 | * Copyright (c) 1993 by Chris Provenzano and contributors, proven@mit.edu | |
| 12 | * All rights reserved. | |
| 13 | * | |
| 14 | * Redistribution and use in source and binary forms, with or without | |
| 15 | * modification, are permitted provided that the following conditions | |
| 16 | * are met: | |
| 17 | * 1. Redistributions of source code must retain the above copyright | |
| 18 | * notice, this list of conditions and the following disclaimer. | |
| 19 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 20 | * notice, this list of conditions and the following disclaimer in the | |
| 21 | * documentation and/or other materials provided with the distribution. | |
| 22 | * 3. All advertising materials mentioning features or use of this software | |
| 23 | * must display the following acknowledgement: | |
| 24 | * This product includes software developed by Chris Provenzano, | |
| 25 | * the University of California, Berkeley, and contributors. | |
| 26 | * 4. Neither the name of Chris Provenzano, the University, nor the names of | |
| 27 | * contributors may be used to endorse or promote products derived | |
| 28 | * from this software without specific prior written permission. | |
| 29 | * | |
| 30 | * THIS SOFTWARE IS PROVIDED BY CHRIS PROVENZANO AND CONTRIBUTORS ``AS IS'' AND | |
| 31 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 32 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 33 | * ARE DISCLAIMED. IN NO EVENT SHALL CHRIS PROVENZANO, THE REGENTS OR | |
| 34 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 35 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 36 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; | |
| 37 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
| 38 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR | |
| 39 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF | |
| 40 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 41 | */ | |
| 90269d47 AM |
42 | /* |
| 43 | * New cond structures | |
| 44 | */ | |
| 45 | enum pthread_cond_type { | |
| 46 | COND_TYPE_FAST, | |
| 47 | COND_TYPE_STATIC_FAST, | |
| 48 | COND_TYPE_METERED, | |
| 49 | COND_TYPE_DEBUG, /* Debug conds will have lots of options */ | |
| 50 | COND_TYPE_MAX | |
| 51 | }; | |
| 52 | ||
| 53 | typedef struct pthread_cond { | |
| 54 | enum pthread_cond_type c_type; | |
| 55 | struct pthread_queue c_queue; | |
| 56 | semaphore c_lock; | |
| 57 | void * c_data; | |
| 58 | long c_flags; | |
| 59 | } pthread_cond_t; | |
| 60 | ||
| 61 | typedef struct pthread_cond_attr { | |
| 62 | enum pthread_cond_type c_type; | |
| 63 | long c_flags; | |
| 64 | } pthread_condattr_t; | |
| 65 | ||
| 66 | /* | |
| 67 | * Flags for conds. | |
| 68 | */ | |
| 69 | #define COND_FLAGS_PRIVATE 0x01 | |
| 70 | #define COND_FLAGS_INITED 0x02 | |
| 71 | #define COND_FLAGS_BUSY 0x04 | |
| 72 | ||
| 73 | /* | |
| 74 | * Static cond initialization values. | |
| 75 | */ | |
| 76 | #define PTHREAD_COND_INITIALIZER \ | |
| 77 | { COND_TYPE_STATIC_FAST, PTHREAD_QUEUE_INITIALIZER, \ | |
| 78 | NULL, SEMAPHORE_CLEAR, COND_FLAGS_INITED } | |
| 79 | ||
| 80 | /* | |
| 81 | * New functions | |
| 82 | */ | |
| 83 | ||
| 84 | __BEGIN_DECLS | |
| 85 | ||
| 86 | int pthread_cond_init __P((pthread_cond_t *, pthread_condattr_t *)); | |
| 87 | int pthread_cond_wait __P((pthread_cond_t *, pthread_mutex_t *)); | |
| 88 | int pthread_cond_signal __P((pthread_cond_t *)); | |
| 89 | int pthread_cond_broadcast __P((pthread_cond_t *)); | |
| 90 | int pthread_cond_destroy __P((pthread_cond_t *)); | |
| 91 | ||
| 92 | __END_DECLS | |
| 93 |