| 1 | /* Locking in multithreaded situations.
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| 2 | Copyright (C) 2005-2012 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software; you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 3, or (at your option)
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| 7 | any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program; if not, see <http://www.gnu.org/licenses/>. */
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| 16 |
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| 17 | /* Written by Bruno Haible <bruno@clisp.org>, 2005.
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| 18 | Based on GCC's gthr-posix.h, gthr-posix95.h, gthr-solaris.h,
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| 19 | gthr-win32.h. */
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| 20 |
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| 21 | /* This file contains locking primitives for use with a given thread library.
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| 22 | It does not contain primitives for creating threads or for other
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| 23 | synchronization primitives.
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| 24 |
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| 25 | Normal (non-recursive) locks:
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| 26 | Type: gl_lock_t
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| 27 | Declaration: gl_lock_define(extern, name)
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| 28 | Initializer: gl_lock_define_initialized(, name)
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| 29 | Initialization: gl_lock_init (name);
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| 30 | Taking the lock: gl_lock_lock (name);
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| 31 | Releasing the lock: gl_lock_unlock (name);
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| 32 | De-initialization: gl_lock_destroy (name);
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| 33 | Equivalent functions with control of error handling:
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| 34 | Initialization: err = glthread_lock_init (&name);
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| 35 | Taking the lock: err = glthread_lock_lock (&name);
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| 36 | Releasing the lock: err = glthread_lock_unlock (&name);
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| 37 | De-initialization: err = glthread_lock_destroy (&name);
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| 38 |
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| 39 | Read-Write (non-recursive) locks:
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| 40 | Type: gl_rwlock_t
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| 41 | Declaration: gl_rwlock_define(extern, name)
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| 42 | Initializer: gl_rwlock_define_initialized(, name)
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| 43 | Initialization: gl_rwlock_init (name);
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| 44 | Taking the lock: gl_rwlock_rdlock (name);
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| 45 | gl_rwlock_wrlock (name);
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| 46 | Releasing the lock: gl_rwlock_unlock (name);
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| 47 | De-initialization: gl_rwlock_destroy (name);
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| 48 | Equivalent functions with control of error handling:
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| 49 | Initialization: err = glthread_rwlock_init (&name);
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| 50 | Taking the lock: err = glthread_rwlock_rdlock (&name);
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| 51 | err = glthread_rwlock_wrlock (&name);
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| 52 | Releasing the lock: err = glthread_rwlock_unlock (&name);
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| 53 | De-initialization: err = glthread_rwlock_destroy (&name);
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| 54 |
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| 55 | Recursive locks:
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| 56 | Type: gl_recursive_lock_t
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| 57 | Declaration: gl_recursive_lock_define(extern, name)
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| 58 | Initializer: gl_recursive_lock_define_initialized(, name)
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| 59 | Initialization: gl_recursive_lock_init (name);
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| 60 | Taking the lock: gl_recursive_lock_lock (name);
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| 61 | Releasing the lock: gl_recursive_lock_unlock (name);
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| 62 | De-initialization: gl_recursive_lock_destroy (name);
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| 63 | Equivalent functions with control of error handling:
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| 64 | Initialization: err = glthread_recursive_lock_init (&name);
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| 65 | Taking the lock: err = glthread_recursive_lock_lock (&name);
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| 66 | Releasing the lock: err = glthread_recursive_lock_unlock (&name);
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| 67 | De-initialization: err = glthread_recursive_lock_destroy (&name);
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| 68 |
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| 69 | Once-only execution:
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| 70 | Type: gl_once_t
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| 71 | Initializer: gl_once_define(extern, name)
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| 72 | Execution: gl_once (name, initfunction);
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| 73 | Equivalent functions with control of error handling:
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| 74 | Execution: err = glthread_once (&name, initfunction);
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| 75 | */
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| 76 |
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| 77 |
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| 78 | #ifndef _LOCK_H
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| 79 | #define _LOCK_H
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| 80 |
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| 81 | #include <errno.h>
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| 82 | #include <stdlib.h>
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| 83 |
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| 84 | /* ========================================================================= */
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| 85 |
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| 86 | #if USE_POSIX_THREADS
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| 87 |
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| 88 | /* Use the POSIX threads library. */
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| 89 |
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| 90 | # include <pthread.h>
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| 91 |
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| 92 | # ifdef __cplusplus
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| 93 | extern "C" {
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| 94 | # endif
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| 95 |
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| 96 | # if PTHREAD_IN_USE_DETECTION_HARD
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| 97 |
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| 98 | /* The pthread_in_use() detection needs to be done at runtime. */
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| 99 | # define pthread_in_use() \
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| 100 | glthread_in_use ()
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| 101 | extern int glthread_in_use (void);
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| 102 |
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| 103 | # endif
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| 104 |
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| 105 | # if USE_POSIX_THREADS_WEAK
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| 106 |
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| 107 | /* Use weak references to the POSIX threads library. */
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| 108 |
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| 109 | /* Weak references avoid dragging in external libraries if the other parts
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| 110 | of the program don't use them. Here we use them, because we don't want
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| 111 | every program that uses libintl to depend on libpthread. This assumes
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| 112 | that libpthread would not be loaded after libintl; i.e. if libintl is
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| 113 | loaded first, by an executable that does not depend on libpthread, and
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| 114 | then a module is dynamically loaded that depends on libpthread, libintl
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| 115 | will not be multithread-safe. */
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| 116 |
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| 117 | /* The way to test at runtime whether libpthread is present is to test
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| 118 | whether a function pointer's value, such as &pthread_mutex_init, is
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| 119 | non-NULL. However, some versions of GCC have a bug through which, in
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| 120 | PIC mode, &foo != NULL always evaluates to true if there is a direct
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| 121 | call to foo(...) in the same function. To avoid this, we test the
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| 122 | address of a function in libpthread that we don't use. */
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| 123 |
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| 124 | # pragma weak pthread_mutex_init
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| 125 | # pragma weak pthread_mutex_lock
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| 126 | # pragma weak pthread_mutex_unlock
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| 127 | # pragma weak pthread_mutex_destroy
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| 128 | # pragma weak pthread_rwlock_init
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| 129 | # pragma weak pthread_rwlock_rdlock
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| 130 | # pragma weak pthread_rwlock_wrlock
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| 131 | # pragma weak pthread_rwlock_unlock
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| 132 | # pragma weak pthread_rwlock_destroy
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| 133 | # pragma weak pthread_once
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| 134 | # pragma weak pthread_cond_init
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| 135 | # pragma weak pthread_cond_wait
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| 136 | # pragma weak pthread_cond_signal
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| 137 | # pragma weak pthread_cond_broadcast
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| 138 | # pragma weak pthread_cond_destroy
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| 139 | # pragma weak pthread_mutexattr_init
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| 140 | # pragma weak pthread_mutexattr_settype
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| 141 | # pragma weak pthread_mutexattr_destroy
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| 142 | # ifndef pthread_self
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| 143 | # pragma weak pthread_self
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| 144 | # endif
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| 145 |
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| 146 | # if !PTHREAD_IN_USE_DETECTION_HARD
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| 147 | # pragma weak pthread_cancel
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| 148 | # define pthread_in_use() (pthread_cancel != NULL)
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| 149 | # endif
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| 150 |
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| 151 | # else
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| 152 |
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| 153 | # if !PTHREAD_IN_USE_DETECTION_HARD
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| 154 | # define pthread_in_use() 1
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| 155 | # endif
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| 156 |
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| 157 | # endif
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| 158 |
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| 159 | /* -------------------------- gl_lock_t datatype -------------------------- */
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| 160 |
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| 161 | typedef pthread_mutex_t gl_lock_t;
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| 162 | # define gl_lock_define(STORAGECLASS, NAME) \
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| 163 | STORAGECLASS pthread_mutex_t NAME;
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| 164 | # define gl_lock_define_initialized(STORAGECLASS, NAME) \
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| 165 | STORAGECLASS pthread_mutex_t NAME = gl_lock_initializer;
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| 166 | # define gl_lock_initializer \
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| 167 | PTHREAD_MUTEX_INITIALIZER
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| 168 | # define glthread_lock_init(LOCK) \
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| 169 | (pthread_in_use () ? pthread_mutex_init (LOCK, NULL) : 0)
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| 170 | # define glthread_lock_lock(LOCK) \
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| 171 | (pthread_in_use () ? pthread_mutex_lock (LOCK) : 0)
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| 172 | # define glthread_lock_unlock(LOCK) \
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| 173 | (pthread_in_use () ? pthread_mutex_unlock (LOCK) : 0)
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| 174 | # define glthread_lock_destroy(LOCK) \
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| 175 | (pthread_in_use () ? pthread_mutex_destroy (LOCK) : 0)
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| 176 |
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| 177 | /* ------------------------- gl_rwlock_t datatype ------------------------- */
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| 178 |
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| 179 | # if HAVE_PTHREAD_RWLOCK
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| 180 |
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| 181 | # ifdef PTHREAD_RWLOCK_INITIALIZER
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| 182 |
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| 183 | typedef pthread_rwlock_t gl_rwlock_t;
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| 184 | # define gl_rwlock_define(STORAGECLASS, NAME) \
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| 185 | STORAGECLASS pthread_rwlock_t NAME;
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| 186 | # define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
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| 187 | STORAGECLASS pthread_rwlock_t NAME = gl_rwlock_initializer;
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| 188 | # define gl_rwlock_initializer \
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| 189 | PTHREAD_RWLOCK_INITIALIZER
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| 190 | # define glthread_rwlock_init(LOCK) \
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| 191 | (pthread_in_use () ? pthread_rwlock_init (LOCK, NULL) : 0)
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| 192 | # define glthread_rwlock_rdlock(LOCK) \
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| 193 | (pthread_in_use () ? pthread_rwlock_rdlock (LOCK) : 0)
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| 194 | # define glthread_rwlock_wrlock(LOCK) \
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| 195 | (pthread_in_use () ? pthread_rwlock_wrlock (LOCK) : 0)
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| 196 | # define glthread_rwlock_unlock(LOCK) \
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| 197 | (pthread_in_use () ? pthread_rwlock_unlock (LOCK) : 0)
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| 198 | # define glthread_rwlock_destroy(LOCK) \
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| 199 | (pthread_in_use () ? pthread_rwlock_destroy (LOCK) : 0)
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| 200 |
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| 201 | # else
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| 202 |
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| 203 | typedef struct
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| 204 | {
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| 205 | int initialized;
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| 206 | pthread_mutex_t guard; /* protects the initialization */
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| 207 | pthread_rwlock_t rwlock; /* read-write lock */
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| 208 | }
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| 209 | gl_rwlock_t;
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| 210 | # define gl_rwlock_define(STORAGECLASS, NAME) \
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| 211 | STORAGECLASS gl_rwlock_t NAME;
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| 212 | # define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
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| 213 | STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
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| 214 | # define gl_rwlock_initializer \
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| 215 | { 0, PTHREAD_MUTEX_INITIALIZER }
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| 216 | # define glthread_rwlock_init(LOCK) \
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| 217 | (pthread_in_use () ? glthread_rwlock_init_multithreaded (LOCK) : 0)
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| 218 | # define glthread_rwlock_rdlock(LOCK) \
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| 219 | (pthread_in_use () ? glthread_rwlock_rdlock_multithreaded (LOCK) : 0)
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| 220 | # define glthread_rwlock_wrlock(LOCK) \
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| 221 | (pthread_in_use () ? glthread_rwlock_wrlock_multithreaded (LOCK) : 0)
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| 222 | # define glthread_rwlock_unlock(LOCK) \
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| 223 | (pthread_in_use () ? glthread_rwlock_unlock_multithreaded (LOCK) : 0)
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| 224 | # define glthread_rwlock_destroy(LOCK) \
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| 225 | (pthread_in_use () ? glthread_rwlock_destroy_multithreaded (LOCK) : 0)
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| 226 | extern int glthread_rwlock_init_multithreaded (gl_rwlock_t *lock);
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| 227 | extern int glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock);
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| 228 | extern int glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock);
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| 229 | extern int glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock);
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| 230 | extern int glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock);
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| 231 |
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| 232 | # endif
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| 233 |
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| 234 | # else
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| 235 |
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| 236 | typedef struct
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| 237 | {
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| 238 | pthread_mutex_t lock; /* protects the remaining fields */
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| 239 | pthread_cond_t waiting_readers; /* waiting readers */
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| 240 | pthread_cond_t waiting_writers; /* waiting writers */
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| 241 | unsigned int waiting_writers_count; /* number of waiting writers */
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| 242 | int runcount; /* number of readers running, or -1 when a writer runs */
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| 243 | }
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| 244 | gl_rwlock_t;
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| 245 | # define gl_rwlock_define(STORAGECLASS, NAME) \
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| 246 | STORAGECLASS gl_rwlock_t NAME;
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| 247 | # define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
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| 248 | STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
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| 249 | # define gl_rwlock_initializer \
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| 250 | { PTHREAD_MUTEX_INITIALIZER, PTHREAD_COND_INITIALIZER, PTHREAD_COND_INITIALIZER, 0, 0 }
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| 251 | # define glthread_rwlock_init(LOCK) \
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| 252 | (pthread_in_use () ? glthread_rwlock_init_multithreaded (LOCK) : 0)
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| 253 | # define glthread_rwlock_rdlock(LOCK) \
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| 254 | (pthread_in_use () ? glthread_rwlock_rdlock_multithreaded (LOCK) : 0)
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| 255 | # define glthread_rwlock_wrlock(LOCK) \
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| 256 | (pthread_in_use () ? glthread_rwlock_wrlock_multithreaded (LOCK) : 0)
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| 257 | # define glthread_rwlock_unlock(LOCK) \
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| 258 | (pthread_in_use () ? glthread_rwlock_unlock_multithreaded (LOCK) : 0)
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| 259 | # define glthread_rwlock_destroy(LOCK) \
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| 260 | (pthread_in_use () ? glthread_rwlock_destroy_multithreaded (LOCK) : 0)
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| 261 | extern int glthread_rwlock_init_multithreaded (gl_rwlock_t *lock);
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| 262 | extern int glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock);
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| 263 | extern int glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock);
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| 264 | extern int glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock);
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| 265 | extern int glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock);
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| 266 |
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| 267 | # endif
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| 268 |
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| 269 | /* --------------------- gl_recursive_lock_t datatype --------------------- */
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| 270 |
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| 271 | # if HAVE_PTHREAD_MUTEX_RECURSIVE
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| 272 |
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| 273 | # if defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER || defined PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
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| 274 |
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| 275 | typedef pthread_mutex_t gl_recursive_lock_t;
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| 276 | # define gl_recursive_lock_define(STORAGECLASS, NAME) \
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| 277 | STORAGECLASS pthread_mutex_t NAME;
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| 278 | # define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
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| 279 | STORAGECLASS pthread_mutex_t NAME = gl_recursive_lock_initializer;
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| 280 | # ifdef PTHREAD_RECURSIVE_MUTEX_INITIALIZER
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| 281 | # define gl_recursive_lock_initializer \
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| 282 | PTHREAD_RECURSIVE_MUTEX_INITIALIZER
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| 283 | # else
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| 284 | # define gl_recursive_lock_initializer \
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| 285 | PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
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| 286 | # endif
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| 287 | # define glthread_recursive_lock_init(LOCK) \
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| 288 | (pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
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| 289 | # define glthread_recursive_lock_lock(LOCK) \
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| 290 | (pthread_in_use () ? pthread_mutex_lock (LOCK) : 0)
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| 291 | # define glthread_recursive_lock_unlock(LOCK) \
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| 292 | (pthread_in_use () ? pthread_mutex_unlock (LOCK) : 0)
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| 293 | # define glthread_recursive_lock_destroy(LOCK) \
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| 294 | (pthread_in_use () ? pthread_mutex_destroy (LOCK) : 0)
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| 295 | extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
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| 296 |
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| 297 | # else
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| 298 |
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| 299 | typedef struct
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| 300 | {
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| 301 | pthread_mutex_t recmutex; /* recursive mutex */
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| 302 | pthread_mutex_t guard; /* protects the initialization */
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| 303 | int initialized;
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| 304 | }
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| 305 | gl_recursive_lock_t;
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| 306 | # define gl_recursive_lock_define(STORAGECLASS, NAME) \
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| 307 | STORAGECLASS gl_recursive_lock_t NAME;
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| 308 | # define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
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| 309 | STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
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| 310 | # define gl_recursive_lock_initializer \
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| 311 | { PTHREAD_MUTEX_INITIALIZER, PTHREAD_MUTEX_INITIALIZER, 0 }
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| 312 | # define glthread_recursive_lock_init(LOCK) \
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| 313 | (pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
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| 314 | # define glthread_recursive_lock_lock(LOCK) \
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| 315 | (pthread_in_use () ? glthread_recursive_lock_lock_multithreaded (LOCK) : 0)
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| 316 | # define glthread_recursive_lock_unlock(LOCK) \
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| 317 | (pthread_in_use () ? glthread_recursive_lock_unlock_multithreaded (LOCK) : 0)
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| 318 | # define glthread_recursive_lock_destroy(LOCK) \
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| 319 | (pthread_in_use () ? glthread_recursive_lock_destroy_multithreaded (LOCK) : 0)
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| 320 | extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
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| 321 | extern int glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock);
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| 322 | extern int glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock);
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| 323 | extern int glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock);
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| 324 |
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| 325 | # endif
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| 326 |
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| 327 | # else
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| 328 |
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| 329 | /* Old versions of POSIX threads on Solaris did not have recursive locks.
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| 330 | We have to implement them ourselves. */
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| 331 |
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| 332 | typedef struct
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| 333 | {
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| 334 | pthread_mutex_t mutex;
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| 335 | pthread_t owner;
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| 336 | unsigned long depth;
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| 337 | }
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| 338 | gl_recursive_lock_t;
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| 339 | # define gl_recursive_lock_define(STORAGECLASS, NAME) \
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| 340 | STORAGECLASS gl_recursive_lock_t NAME;
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| 341 | # define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
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| 342 | STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
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| 343 | # define gl_recursive_lock_initializer \
|
|---|
| 344 | { PTHREAD_MUTEX_INITIALIZER, (pthread_t) 0, 0 }
|
|---|
| 345 | # define glthread_recursive_lock_init(LOCK) \
|
|---|
| 346 | (pthread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
|
|---|
| 347 | # define glthread_recursive_lock_lock(LOCK) \
|
|---|
| 348 | (pthread_in_use () ? glthread_recursive_lock_lock_multithreaded (LOCK) : 0)
|
|---|
| 349 | # define glthread_recursive_lock_unlock(LOCK) \
|
|---|
| 350 | (pthread_in_use () ? glthread_recursive_lock_unlock_multithreaded (LOCK) : 0)
|
|---|
| 351 | # define glthread_recursive_lock_destroy(LOCK) \
|
|---|
| 352 | (pthread_in_use () ? glthread_recursive_lock_destroy_multithreaded (LOCK) : 0)
|
|---|
| 353 | extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
|
|---|
| 354 | extern int glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock);
|
|---|
| 355 | extern int glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock);
|
|---|
| 356 | extern int glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock);
|
|---|
| 357 |
|
|---|
| 358 | # endif
|
|---|
| 359 |
|
|---|
| 360 | /* -------------------------- gl_once_t datatype -------------------------- */
|
|---|
| 361 |
|
|---|
| 362 | typedef pthread_once_t gl_once_t;
|
|---|
| 363 | # define gl_once_define(STORAGECLASS, NAME) \
|
|---|
| 364 | STORAGECLASS pthread_once_t NAME = PTHREAD_ONCE_INIT;
|
|---|
| 365 | # define glthread_once(ONCE_CONTROL, INITFUNCTION) \
|
|---|
| 366 | (pthread_in_use () \
|
|---|
| 367 | ? pthread_once (ONCE_CONTROL, INITFUNCTION) \
|
|---|
| 368 | : (glthread_once_singlethreaded (ONCE_CONTROL) ? (INITFUNCTION (), 0) : 0))
|
|---|
| 369 | extern int glthread_once_singlethreaded (pthread_once_t *once_control);
|
|---|
| 370 |
|
|---|
| 371 | # ifdef __cplusplus
|
|---|
| 372 | }
|
|---|
| 373 | # endif
|
|---|
| 374 |
|
|---|
| 375 | #endif
|
|---|
| 376 |
|
|---|
| 377 | /* ========================================================================= */
|
|---|
| 378 |
|
|---|
| 379 | #if USE_PTH_THREADS
|
|---|
| 380 |
|
|---|
| 381 | /* Use the GNU Pth threads library. */
|
|---|
| 382 |
|
|---|
| 383 | # include <pth.h>
|
|---|
| 384 |
|
|---|
| 385 | # ifdef __cplusplus
|
|---|
| 386 | extern "C" {
|
|---|
| 387 | # endif
|
|---|
| 388 |
|
|---|
| 389 | # if USE_PTH_THREADS_WEAK
|
|---|
| 390 |
|
|---|
| 391 | /* Use weak references to the GNU Pth threads library. */
|
|---|
| 392 |
|
|---|
| 393 | # pragma weak pth_mutex_init
|
|---|
| 394 | # pragma weak pth_mutex_acquire
|
|---|
| 395 | # pragma weak pth_mutex_release
|
|---|
| 396 | # pragma weak pth_rwlock_init
|
|---|
| 397 | # pragma weak pth_rwlock_acquire
|
|---|
| 398 | # pragma weak pth_rwlock_release
|
|---|
| 399 | # pragma weak pth_once
|
|---|
| 400 |
|
|---|
| 401 | # pragma weak pth_cancel
|
|---|
| 402 | # define pth_in_use() (pth_cancel != NULL)
|
|---|
| 403 |
|
|---|
| 404 | # else
|
|---|
| 405 |
|
|---|
| 406 | # define pth_in_use() 1
|
|---|
| 407 |
|
|---|
| 408 | # endif
|
|---|
| 409 |
|
|---|
| 410 | /* -------------------------- gl_lock_t datatype -------------------------- */
|
|---|
| 411 |
|
|---|
| 412 | typedef pth_mutex_t gl_lock_t;
|
|---|
| 413 | # define gl_lock_define(STORAGECLASS, NAME) \
|
|---|
| 414 | STORAGECLASS pth_mutex_t NAME;
|
|---|
| 415 | # define gl_lock_define_initialized(STORAGECLASS, NAME) \
|
|---|
| 416 | STORAGECLASS pth_mutex_t NAME = gl_lock_initializer;
|
|---|
| 417 | # define gl_lock_initializer \
|
|---|
| 418 | PTH_MUTEX_INIT
|
|---|
| 419 | # define glthread_lock_init(LOCK) \
|
|---|
| 420 | (pth_in_use () && !pth_mutex_init (LOCK) ? errno : 0)
|
|---|
| 421 | # define glthread_lock_lock(LOCK) \
|
|---|
| 422 | (pth_in_use () && !pth_mutex_acquire (LOCK, 0, NULL) ? errno : 0)
|
|---|
| 423 | # define glthread_lock_unlock(LOCK) \
|
|---|
| 424 | (pth_in_use () && !pth_mutex_release (LOCK) ? errno : 0)
|
|---|
| 425 | # define glthread_lock_destroy(LOCK) \
|
|---|
| 426 | ((void)(LOCK), 0)
|
|---|
| 427 |
|
|---|
| 428 | /* ------------------------- gl_rwlock_t datatype ------------------------- */
|
|---|
| 429 |
|
|---|
| 430 | typedef pth_rwlock_t gl_rwlock_t;
|
|---|
| 431 | # define gl_rwlock_define(STORAGECLASS, NAME) \
|
|---|
| 432 | STORAGECLASS pth_rwlock_t NAME;
|
|---|
| 433 | # define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
|
|---|
| 434 | STORAGECLASS pth_rwlock_t NAME = gl_rwlock_initializer;
|
|---|
| 435 | # define gl_rwlock_initializer \
|
|---|
| 436 | PTH_RWLOCK_INIT
|
|---|
| 437 | # define glthread_rwlock_init(LOCK) \
|
|---|
| 438 | (pth_in_use () && !pth_rwlock_init (LOCK) ? errno : 0)
|
|---|
| 439 | # define glthread_rwlock_rdlock(LOCK) \
|
|---|
| 440 | (pth_in_use () && !pth_rwlock_acquire (LOCK, PTH_RWLOCK_RD, 0, NULL) ? errno : 0)
|
|---|
| 441 | # define glthread_rwlock_wrlock(LOCK) \
|
|---|
| 442 | (pth_in_use () && !pth_rwlock_acquire (LOCK, PTH_RWLOCK_RW, 0, NULL) ? errno : 0)
|
|---|
| 443 | # define glthread_rwlock_unlock(LOCK) \
|
|---|
| 444 | (pth_in_use () && !pth_rwlock_release (LOCK) ? errno : 0)
|
|---|
| 445 | # define glthread_rwlock_destroy(LOCK) \
|
|---|
| 446 | ((void)(LOCK), 0)
|
|---|
| 447 |
|
|---|
| 448 | /* --------------------- gl_recursive_lock_t datatype --------------------- */
|
|---|
| 449 |
|
|---|
| 450 | /* In Pth, mutexes are recursive by default. */
|
|---|
| 451 | typedef pth_mutex_t gl_recursive_lock_t;
|
|---|
| 452 | # define gl_recursive_lock_define(STORAGECLASS, NAME) \
|
|---|
| 453 | STORAGECLASS pth_mutex_t NAME;
|
|---|
| 454 | # define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
|
|---|
| 455 | STORAGECLASS pth_mutex_t NAME = gl_recursive_lock_initializer;
|
|---|
| 456 | # define gl_recursive_lock_initializer \
|
|---|
| 457 | PTH_MUTEX_INIT
|
|---|
| 458 | # define glthread_recursive_lock_init(LOCK) \
|
|---|
| 459 | (pth_in_use () && !pth_mutex_init (LOCK) ? errno : 0)
|
|---|
| 460 | # define glthread_recursive_lock_lock(LOCK) \
|
|---|
| 461 | (pth_in_use () && !pth_mutex_acquire (LOCK, 0, NULL) ? errno : 0)
|
|---|
| 462 | # define glthread_recursive_lock_unlock(LOCK) \
|
|---|
| 463 | (pth_in_use () && !pth_mutex_release (LOCK) ? errno : 0)
|
|---|
| 464 | # define glthread_recursive_lock_destroy(LOCK) \
|
|---|
| 465 | ((void)(LOCK), 0)
|
|---|
| 466 |
|
|---|
| 467 | /* -------------------------- gl_once_t datatype -------------------------- */
|
|---|
| 468 |
|
|---|
| 469 | typedef pth_once_t gl_once_t;
|
|---|
| 470 | # define gl_once_define(STORAGECLASS, NAME) \
|
|---|
| 471 | STORAGECLASS pth_once_t NAME = PTH_ONCE_INIT;
|
|---|
| 472 | # define glthread_once(ONCE_CONTROL, INITFUNCTION) \
|
|---|
| 473 | (pth_in_use () \
|
|---|
| 474 | ? glthread_once_multithreaded (ONCE_CONTROL, INITFUNCTION) \
|
|---|
| 475 | : (glthread_once_singlethreaded (ONCE_CONTROL) ? (INITFUNCTION (), 0) : 0))
|
|---|
| 476 | extern int glthread_once_multithreaded (pth_once_t *once_control, void (*initfunction) (void));
|
|---|
| 477 | extern int glthread_once_singlethreaded (pth_once_t *once_control);
|
|---|
| 478 |
|
|---|
| 479 | # ifdef __cplusplus
|
|---|
| 480 | }
|
|---|
| 481 | # endif
|
|---|
| 482 |
|
|---|
| 483 | #endif
|
|---|
| 484 |
|
|---|
| 485 | /* ========================================================================= */
|
|---|
| 486 |
|
|---|
| 487 | #if USE_SOLARIS_THREADS
|
|---|
| 488 |
|
|---|
| 489 | /* Use the old Solaris threads library. */
|
|---|
| 490 |
|
|---|
| 491 | # include <thread.h>
|
|---|
| 492 | # include <synch.h>
|
|---|
| 493 |
|
|---|
| 494 | # ifdef __cplusplus
|
|---|
| 495 | extern "C" {
|
|---|
| 496 | # endif
|
|---|
| 497 |
|
|---|
| 498 | # if USE_SOLARIS_THREADS_WEAK
|
|---|
| 499 |
|
|---|
| 500 | /* Use weak references to the old Solaris threads library. */
|
|---|
| 501 |
|
|---|
| 502 | # pragma weak mutex_init
|
|---|
| 503 | # pragma weak mutex_lock
|
|---|
| 504 | # pragma weak mutex_unlock
|
|---|
| 505 | # pragma weak mutex_destroy
|
|---|
| 506 | # pragma weak rwlock_init
|
|---|
| 507 | # pragma weak rw_rdlock
|
|---|
| 508 | # pragma weak rw_wrlock
|
|---|
| 509 | # pragma weak rw_unlock
|
|---|
| 510 | # pragma weak rwlock_destroy
|
|---|
| 511 | # pragma weak thr_self
|
|---|
| 512 |
|
|---|
| 513 | # pragma weak thr_suspend
|
|---|
| 514 | # define thread_in_use() (thr_suspend != NULL)
|
|---|
| 515 |
|
|---|
| 516 | # else
|
|---|
| 517 |
|
|---|
| 518 | # define thread_in_use() 1
|
|---|
| 519 |
|
|---|
| 520 | # endif
|
|---|
| 521 |
|
|---|
| 522 | /* -------------------------- gl_lock_t datatype -------------------------- */
|
|---|
| 523 |
|
|---|
| 524 | typedef mutex_t gl_lock_t;
|
|---|
| 525 | # define gl_lock_define(STORAGECLASS, NAME) \
|
|---|
| 526 | STORAGECLASS mutex_t NAME;
|
|---|
| 527 | # define gl_lock_define_initialized(STORAGECLASS, NAME) \
|
|---|
| 528 | STORAGECLASS mutex_t NAME = gl_lock_initializer;
|
|---|
| 529 | # define gl_lock_initializer \
|
|---|
| 530 | DEFAULTMUTEX
|
|---|
| 531 | # define glthread_lock_init(LOCK) \
|
|---|
| 532 | (thread_in_use () ? mutex_init (LOCK, USYNC_THREAD, NULL) : 0)
|
|---|
| 533 | # define glthread_lock_lock(LOCK) \
|
|---|
| 534 | (thread_in_use () ? mutex_lock (LOCK) : 0)
|
|---|
| 535 | # define glthread_lock_unlock(LOCK) \
|
|---|
| 536 | (thread_in_use () ? mutex_unlock (LOCK) : 0)
|
|---|
| 537 | # define glthread_lock_destroy(LOCK) \
|
|---|
| 538 | (thread_in_use () ? mutex_destroy (LOCK) : 0)
|
|---|
| 539 |
|
|---|
| 540 | /* ------------------------- gl_rwlock_t datatype ------------------------- */
|
|---|
| 541 |
|
|---|
| 542 | typedef rwlock_t gl_rwlock_t;
|
|---|
| 543 | # define gl_rwlock_define(STORAGECLASS, NAME) \
|
|---|
| 544 | STORAGECLASS rwlock_t NAME;
|
|---|
| 545 | # define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
|
|---|
| 546 | STORAGECLASS rwlock_t NAME = gl_rwlock_initializer;
|
|---|
| 547 | # define gl_rwlock_initializer \
|
|---|
| 548 | DEFAULTRWLOCK
|
|---|
| 549 | # define glthread_rwlock_init(LOCK) \
|
|---|
| 550 | (thread_in_use () ? rwlock_init (LOCK, USYNC_THREAD, NULL) : 0)
|
|---|
| 551 | # define glthread_rwlock_rdlock(LOCK) \
|
|---|
| 552 | (thread_in_use () ? rw_rdlock (LOCK) : 0)
|
|---|
| 553 | # define glthread_rwlock_wrlock(LOCK) \
|
|---|
| 554 | (thread_in_use () ? rw_wrlock (LOCK) : 0)
|
|---|
| 555 | # define glthread_rwlock_unlock(LOCK) \
|
|---|
| 556 | (thread_in_use () ? rw_unlock (LOCK) : 0)
|
|---|
| 557 | # define glthread_rwlock_destroy(LOCK) \
|
|---|
| 558 | (thread_in_use () ? rwlock_destroy (LOCK) : 0)
|
|---|
| 559 |
|
|---|
| 560 | /* --------------------- gl_recursive_lock_t datatype --------------------- */
|
|---|
| 561 |
|
|---|
| 562 | /* Old Solaris threads did not have recursive locks.
|
|---|
| 563 | We have to implement them ourselves. */
|
|---|
| 564 |
|
|---|
| 565 | typedef struct
|
|---|
| 566 | {
|
|---|
| 567 | mutex_t mutex;
|
|---|
| 568 | thread_t owner;
|
|---|
| 569 | unsigned long depth;
|
|---|
| 570 | }
|
|---|
| 571 | gl_recursive_lock_t;
|
|---|
| 572 | # define gl_recursive_lock_define(STORAGECLASS, NAME) \
|
|---|
| 573 | STORAGECLASS gl_recursive_lock_t NAME;
|
|---|
| 574 | # define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
|
|---|
| 575 | STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
|
|---|
| 576 | # define gl_recursive_lock_initializer \
|
|---|
| 577 | { DEFAULTMUTEX, (thread_t) 0, 0 }
|
|---|
| 578 | # define glthread_recursive_lock_init(LOCK) \
|
|---|
| 579 | (thread_in_use () ? glthread_recursive_lock_init_multithreaded (LOCK) : 0)
|
|---|
| 580 | # define glthread_recursive_lock_lock(LOCK) \
|
|---|
| 581 | (thread_in_use () ? glthread_recursive_lock_lock_multithreaded (LOCK) : 0)
|
|---|
| 582 | # define glthread_recursive_lock_unlock(LOCK) \
|
|---|
| 583 | (thread_in_use () ? glthread_recursive_lock_unlock_multithreaded (LOCK) : 0)
|
|---|
| 584 | # define glthread_recursive_lock_destroy(LOCK) \
|
|---|
| 585 | (thread_in_use () ? glthread_recursive_lock_destroy_multithreaded (LOCK) : 0)
|
|---|
| 586 | extern int glthread_recursive_lock_init_multithreaded (gl_recursive_lock_t *lock);
|
|---|
| 587 | extern int glthread_recursive_lock_lock_multithreaded (gl_recursive_lock_t *lock);
|
|---|
| 588 | extern int glthread_recursive_lock_unlock_multithreaded (gl_recursive_lock_t *lock);
|
|---|
| 589 | extern int glthread_recursive_lock_destroy_multithreaded (gl_recursive_lock_t *lock);
|
|---|
| 590 |
|
|---|
| 591 | /* -------------------------- gl_once_t datatype -------------------------- */
|
|---|
| 592 |
|
|---|
| 593 | typedef struct
|
|---|
| 594 | {
|
|---|
| 595 | volatile int inited;
|
|---|
| 596 | mutex_t mutex;
|
|---|
| 597 | }
|
|---|
| 598 | gl_once_t;
|
|---|
| 599 | # define gl_once_define(STORAGECLASS, NAME) \
|
|---|
| 600 | STORAGECLASS gl_once_t NAME = { 0, DEFAULTMUTEX };
|
|---|
| 601 | # define glthread_once(ONCE_CONTROL, INITFUNCTION) \
|
|---|
| 602 | (thread_in_use () \
|
|---|
| 603 | ? glthread_once_multithreaded (ONCE_CONTROL, INITFUNCTION) \
|
|---|
| 604 | : (glthread_once_singlethreaded (ONCE_CONTROL) ? (INITFUNCTION (), 0) : 0))
|
|---|
| 605 | extern int glthread_once_multithreaded (gl_once_t *once_control, void (*initfunction) (void));
|
|---|
| 606 | extern int glthread_once_singlethreaded (gl_once_t *once_control);
|
|---|
| 607 |
|
|---|
| 608 | # ifdef __cplusplus
|
|---|
| 609 | }
|
|---|
| 610 | # endif
|
|---|
| 611 |
|
|---|
| 612 | #endif
|
|---|
| 613 |
|
|---|
| 614 | /* ========================================================================= */
|
|---|
| 615 |
|
|---|
| 616 | #if USE_WINDOWS_THREADS
|
|---|
| 617 |
|
|---|
| 618 | # define WIN32_LEAN_AND_MEAN /* avoid including junk */
|
|---|
| 619 | # include <windows.h>
|
|---|
| 620 |
|
|---|
| 621 | # ifdef __cplusplus
|
|---|
| 622 | extern "C" {
|
|---|
| 623 | # endif
|
|---|
| 624 |
|
|---|
| 625 | /* We can use CRITICAL_SECTION directly, rather than the native Windows Event,
|
|---|
| 626 | Mutex, Semaphore types, because
|
|---|
| 627 | - we need only to synchronize inside a single process (address space),
|
|---|
| 628 | not inter-process locking,
|
|---|
| 629 | - we don't need to support trylock operations. (TryEnterCriticalSection
|
|---|
| 630 | does not work on Windows 95/98/ME. Packages that need trylock usually
|
|---|
| 631 | define their own mutex type.) */
|
|---|
| 632 |
|
|---|
| 633 | /* There is no way to statically initialize a CRITICAL_SECTION. It needs
|
|---|
| 634 | to be done lazily, once only. For this we need spinlocks. */
|
|---|
| 635 |
|
|---|
| 636 | typedef struct { volatile int done; volatile long started; } gl_spinlock_t;
|
|---|
| 637 |
|
|---|
| 638 | /* -------------------------- gl_lock_t datatype -------------------------- */
|
|---|
| 639 |
|
|---|
| 640 | typedef struct
|
|---|
| 641 | {
|
|---|
| 642 | gl_spinlock_t guard; /* protects the initialization */
|
|---|
| 643 | CRITICAL_SECTION lock;
|
|---|
| 644 | }
|
|---|
| 645 | gl_lock_t;
|
|---|
| 646 | # define gl_lock_define(STORAGECLASS, NAME) \
|
|---|
| 647 | STORAGECLASS gl_lock_t NAME;
|
|---|
| 648 | # define gl_lock_define_initialized(STORAGECLASS, NAME) \
|
|---|
| 649 | STORAGECLASS gl_lock_t NAME = gl_lock_initializer;
|
|---|
| 650 | # define gl_lock_initializer \
|
|---|
| 651 | { { 0, -1 } }
|
|---|
| 652 | # define glthread_lock_init(LOCK) \
|
|---|
| 653 | (glthread_lock_init_func (LOCK), 0)
|
|---|
| 654 | # define glthread_lock_lock(LOCK) \
|
|---|
| 655 | glthread_lock_lock_func (LOCK)
|
|---|
| 656 | # define glthread_lock_unlock(LOCK) \
|
|---|
| 657 | glthread_lock_unlock_func (LOCK)
|
|---|
| 658 | # define glthread_lock_destroy(LOCK) \
|
|---|
| 659 | glthread_lock_destroy_func (LOCK)
|
|---|
| 660 | extern void glthread_lock_init_func (gl_lock_t *lock);
|
|---|
| 661 | extern int glthread_lock_lock_func (gl_lock_t *lock);
|
|---|
| 662 | extern int glthread_lock_unlock_func (gl_lock_t *lock);
|
|---|
| 663 | extern int glthread_lock_destroy_func (gl_lock_t *lock);
|
|---|
| 664 |
|
|---|
| 665 | /* ------------------------- gl_rwlock_t datatype ------------------------- */
|
|---|
| 666 |
|
|---|
| 667 | /* It is impossible to implement read-write locks using plain locks, without
|
|---|
| 668 | introducing an extra thread dedicated to managing read-write locks.
|
|---|
| 669 | Therefore here we need to use the low-level Event type. */
|
|---|
| 670 |
|
|---|
| 671 | typedef struct
|
|---|
| 672 | {
|
|---|
| 673 | HANDLE *array; /* array of waiting threads, each represented by an event */
|
|---|
| 674 | unsigned int count; /* number of waiting threads */
|
|---|
| 675 | unsigned int alloc; /* length of allocated array */
|
|---|
| 676 | unsigned int offset; /* index of first waiting thread in array */
|
|---|
| 677 | }
|
|---|
| 678 | gl_carray_waitqueue_t;
|
|---|
| 679 | typedef struct
|
|---|
| 680 | {
|
|---|
| 681 | gl_spinlock_t guard; /* protects the initialization */
|
|---|
| 682 | CRITICAL_SECTION lock; /* protects the remaining fields */
|
|---|
| 683 | gl_carray_waitqueue_t waiting_readers; /* waiting readers */
|
|---|
| 684 | gl_carray_waitqueue_t waiting_writers; /* waiting writers */
|
|---|
| 685 | int runcount; /* number of readers running, or -1 when a writer runs */
|
|---|
| 686 | }
|
|---|
| 687 | gl_rwlock_t;
|
|---|
| 688 | # define gl_rwlock_define(STORAGECLASS, NAME) \
|
|---|
| 689 | STORAGECLASS gl_rwlock_t NAME;
|
|---|
| 690 | # define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
|
|---|
| 691 | STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
|
|---|
| 692 | # define gl_rwlock_initializer \
|
|---|
| 693 | { { 0, -1 } }
|
|---|
| 694 | # define glthread_rwlock_init(LOCK) \
|
|---|
| 695 | (glthread_rwlock_init_func (LOCK), 0)
|
|---|
| 696 | # define glthread_rwlock_rdlock(LOCK) \
|
|---|
| 697 | glthread_rwlock_rdlock_func (LOCK)
|
|---|
| 698 | # define glthread_rwlock_wrlock(LOCK) \
|
|---|
| 699 | glthread_rwlock_wrlock_func (LOCK)
|
|---|
| 700 | # define glthread_rwlock_unlock(LOCK) \
|
|---|
| 701 | glthread_rwlock_unlock_func (LOCK)
|
|---|
| 702 | # define glthread_rwlock_destroy(LOCK) \
|
|---|
| 703 | glthread_rwlock_destroy_func (LOCK)
|
|---|
| 704 | extern void glthread_rwlock_init_func (gl_rwlock_t *lock);
|
|---|
| 705 | extern int glthread_rwlock_rdlock_func (gl_rwlock_t *lock);
|
|---|
| 706 | extern int glthread_rwlock_wrlock_func (gl_rwlock_t *lock);
|
|---|
| 707 | extern int glthread_rwlock_unlock_func (gl_rwlock_t *lock);
|
|---|
| 708 | extern int glthread_rwlock_destroy_func (gl_rwlock_t *lock);
|
|---|
| 709 |
|
|---|
| 710 | /* --------------------- gl_recursive_lock_t datatype --------------------- */
|
|---|
| 711 |
|
|---|
| 712 | /* The native Windows documentation says that CRITICAL_SECTION already
|
|---|
| 713 | implements a recursive lock. But we need not rely on it: It's easy to
|
|---|
| 714 | implement a recursive lock without this assumption. */
|
|---|
| 715 |
|
|---|
| 716 | typedef struct
|
|---|
| 717 | {
|
|---|
| 718 | gl_spinlock_t guard; /* protects the initialization */
|
|---|
| 719 | DWORD owner;
|
|---|
| 720 | unsigned long depth;
|
|---|
| 721 | CRITICAL_SECTION lock;
|
|---|
| 722 | }
|
|---|
| 723 | gl_recursive_lock_t;
|
|---|
| 724 | # define gl_recursive_lock_define(STORAGECLASS, NAME) \
|
|---|
| 725 | STORAGECLASS gl_recursive_lock_t NAME;
|
|---|
| 726 | # define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
|
|---|
| 727 | STORAGECLASS gl_recursive_lock_t NAME = gl_recursive_lock_initializer;
|
|---|
| 728 | # define gl_recursive_lock_initializer \
|
|---|
| 729 | { { 0, -1 }, 0, 0 }
|
|---|
| 730 | # define glthread_recursive_lock_init(LOCK) \
|
|---|
| 731 | (glthread_recursive_lock_init_func (LOCK), 0)
|
|---|
| 732 | # define glthread_recursive_lock_lock(LOCK) \
|
|---|
| 733 | glthread_recursive_lock_lock_func (LOCK)
|
|---|
| 734 | # define glthread_recursive_lock_unlock(LOCK) \
|
|---|
| 735 | glthread_recursive_lock_unlock_func (LOCK)
|
|---|
| 736 | # define glthread_recursive_lock_destroy(LOCK) \
|
|---|
| 737 | glthread_recursive_lock_destroy_func (LOCK)
|
|---|
| 738 | extern void glthread_recursive_lock_init_func (gl_recursive_lock_t *lock);
|
|---|
| 739 | extern int glthread_recursive_lock_lock_func (gl_recursive_lock_t *lock);
|
|---|
| 740 | extern int glthread_recursive_lock_unlock_func (gl_recursive_lock_t *lock);
|
|---|
| 741 | extern int glthread_recursive_lock_destroy_func (gl_recursive_lock_t *lock);
|
|---|
| 742 |
|
|---|
| 743 | /* -------------------------- gl_once_t datatype -------------------------- */
|
|---|
| 744 |
|
|---|
| 745 | typedef struct
|
|---|
| 746 | {
|
|---|
| 747 | volatile int inited;
|
|---|
| 748 | volatile long started;
|
|---|
| 749 | CRITICAL_SECTION lock;
|
|---|
| 750 | }
|
|---|
| 751 | gl_once_t;
|
|---|
| 752 | # define gl_once_define(STORAGECLASS, NAME) \
|
|---|
| 753 | STORAGECLASS gl_once_t NAME = { -1, -1 };
|
|---|
| 754 | # define glthread_once(ONCE_CONTROL, INITFUNCTION) \
|
|---|
| 755 | (glthread_once_func (ONCE_CONTROL, INITFUNCTION), 0)
|
|---|
| 756 | extern void glthread_once_func (gl_once_t *once_control, void (*initfunction) (void));
|
|---|
| 757 |
|
|---|
| 758 | # ifdef __cplusplus
|
|---|
| 759 | }
|
|---|
| 760 | # endif
|
|---|
| 761 |
|
|---|
| 762 | #endif
|
|---|
| 763 |
|
|---|
| 764 | /* ========================================================================= */
|
|---|
| 765 |
|
|---|
| 766 | #if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_SOLARIS_THREADS || USE_WINDOWS_THREADS)
|
|---|
| 767 |
|
|---|
| 768 | /* Provide dummy implementation if threads are not supported. */
|
|---|
| 769 |
|
|---|
| 770 | /* -------------------------- gl_lock_t datatype -------------------------- */
|
|---|
| 771 |
|
|---|
| 772 | typedef int gl_lock_t;
|
|---|
| 773 | # define gl_lock_define(STORAGECLASS, NAME)
|
|---|
| 774 | # define gl_lock_define_initialized(STORAGECLASS, NAME)
|
|---|
| 775 | # define glthread_lock_init(NAME) 0
|
|---|
| 776 | # define glthread_lock_lock(NAME) 0
|
|---|
| 777 | # define glthread_lock_unlock(NAME) 0
|
|---|
| 778 | # define glthread_lock_destroy(NAME) 0
|
|---|
| 779 |
|
|---|
| 780 | /* ------------------------- gl_rwlock_t datatype ------------------------- */
|
|---|
| 781 |
|
|---|
| 782 | typedef int gl_rwlock_t;
|
|---|
| 783 | # define gl_rwlock_define(STORAGECLASS, NAME)
|
|---|
| 784 | # define gl_rwlock_define_initialized(STORAGECLASS, NAME)
|
|---|
| 785 | # define glthread_rwlock_init(NAME) 0
|
|---|
| 786 | # define glthread_rwlock_rdlock(NAME) 0
|
|---|
| 787 | # define glthread_rwlock_wrlock(NAME) 0
|
|---|
| 788 | # define glthread_rwlock_unlock(NAME) 0
|
|---|
| 789 | # define glthread_rwlock_destroy(NAME) 0
|
|---|
| 790 |
|
|---|
| 791 | /* --------------------- gl_recursive_lock_t datatype --------------------- */
|
|---|
| 792 |
|
|---|
| 793 | typedef int gl_recursive_lock_t;
|
|---|
| 794 | # define gl_recursive_lock_define(STORAGECLASS, NAME)
|
|---|
| 795 | # define gl_recursive_lock_define_initialized(STORAGECLASS, NAME)
|
|---|
| 796 | # define glthread_recursive_lock_init(NAME) 0
|
|---|
| 797 | # define glthread_recursive_lock_lock(NAME) 0
|
|---|
| 798 | # define glthread_recursive_lock_unlock(NAME) 0
|
|---|
| 799 | # define glthread_recursive_lock_destroy(NAME) 0
|
|---|
| 800 |
|
|---|
| 801 | /* -------------------------- gl_once_t datatype -------------------------- */
|
|---|
| 802 |
|
|---|
| 803 | typedef int gl_once_t;
|
|---|
| 804 | # define gl_once_define(STORAGECLASS, NAME) \
|
|---|
| 805 | STORAGECLASS gl_once_t NAME = 0;
|
|---|
| 806 | # define glthread_once(ONCE_CONTROL, INITFUNCTION) \
|
|---|
| 807 | (*(ONCE_CONTROL) == 0 ? (*(ONCE_CONTROL) = ~ 0, INITFUNCTION (), 0) : 0)
|
|---|
| 808 |
|
|---|
| 809 | #endif
|
|---|
| 810 |
|
|---|
| 811 | /* ========================================================================= */
|
|---|
| 812 |
|
|---|
| 813 | /* Macros with built-in error handling. */
|
|---|
| 814 |
|
|---|
| 815 | /* -------------------------- gl_lock_t datatype -------------------------- */
|
|---|
| 816 |
|
|---|
| 817 | #define gl_lock_init(NAME) \
|
|---|
| 818 | do \
|
|---|
| 819 | { \
|
|---|
| 820 | if (glthread_lock_init (&NAME)) \
|
|---|
| 821 | abort (); \
|
|---|
| 822 | } \
|
|---|
| 823 | while (0)
|
|---|
| 824 | #define gl_lock_lock(NAME) \
|
|---|
| 825 | do \
|
|---|
| 826 | { \
|
|---|
| 827 | if (glthread_lock_lock (&NAME)) \
|
|---|
| 828 | abort (); \
|
|---|
| 829 | } \
|
|---|
| 830 | while (0)
|
|---|
| 831 | #define gl_lock_unlock(NAME) \
|
|---|
| 832 | do \
|
|---|
| 833 | { \
|
|---|
| 834 | if (glthread_lock_unlock (&NAME)) \
|
|---|
| 835 | abort (); \
|
|---|
| 836 | } \
|
|---|
| 837 | while (0)
|
|---|
| 838 | #define gl_lock_destroy(NAME) \
|
|---|
| 839 | do \
|
|---|
| 840 | { \
|
|---|
| 841 | if (glthread_lock_destroy (&NAME)) \
|
|---|
| 842 | abort (); \
|
|---|
| 843 | } \
|
|---|
| 844 | while (0)
|
|---|
| 845 |
|
|---|
| 846 | /* ------------------------- gl_rwlock_t datatype ------------------------- */
|
|---|
| 847 |
|
|---|
| 848 | #define gl_rwlock_init(NAME) \
|
|---|
| 849 | do \
|
|---|
| 850 | { \
|
|---|
| 851 | if (glthread_rwlock_init (&NAME)) \
|
|---|
| 852 | abort (); \
|
|---|
| 853 | } \
|
|---|
| 854 | while (0)
|
|---|
| 855 | #define gl_rwlock_rdlock(NAME) \
|
|---|
| 856 | do \
|
|---|
| 857 | { \
|
|---|
| 858 | if (glthread_rwlock_rdlock (&NAME)) \
|
|---|
| 859 | abort (); \
|
|---|
| 860 | } \
|
|---|
| 861 | while (0)
|
|---|
| 862 | #define gl_rwlock_wrlock(NAME) \
|
|---|
| 863 | do \
|
|---|
| 864 | { \
|
|---|
| 865 | if (glthread_rwlock_wrlock (&NAME)) \
|
|---|
| 866 | abort (); \
|
|---|
| 867 | } \
|
|---|
| 868 | while (0)
|
|---|
| 869 | #define gl_rwlock_unlock(NAME) \
|
|---|
| 870 | do \
|
|---|
| 871 | { \
|
|---|
| 872 | if (glthread_rwlock_unlock (&NAME)) \
|
|---|
| 873 | abort (); \
|
|---|
| 874 | } \
|
|---|
| 875 | while (0)
|
|---|
| 876 | #define gl_rwlock_destroy(NAME) \
|
|---|
| 877 | do \
|
|---|
| 878 | { \
|
|---|
| 879 | if (glthread_rwlock_destroy (&NAME)) \
|
|---|
| 880 | abort (); \
|
|---|
| 881 | } \
|
|---|
| 882 | while (0)
|
|---|
| 883 |
|
|---|
| 884 | /* --------------------- gl_recursive_lock_t datatype --------------------- */
|
|---|
| 885 |
|
|---|
| 886 | #define gl_recursive_lock_init(NAME) \
|
|---|
| 887 | do \
|
|---|
| 888 | { \
|
|---|
| 889 | if (glthread_recursive_lock_init (&NAME)) \
|
|---|
| 890 | abort (); \
|
|---|
| 891 | } \
|
|---|
| 892 | while (0)
|
|---|
| 893 | #define gl_recursive_lock_lock(NAME) \
|
|---|
| 894 | do \
|
|---|
| 895 | { \
|
|---|
| 896 | if (glthread_recursive_lock_lock (&NAME)) \
|
|---|
| 897 | abort (); \
|
|---|
| 898 | } \
|
|---|
| 899 | while (0)
|
|---|
| 900 | #define gl_recursive_lock_unlock(NAME) \
|
|---|
| 901 | do \
|
|---|
| 902 | { \
|
|---|
| 903 | if (glthread_recursive_lock_unlock (&NAME)) \
|
|---|
| 904 | abort (); \
|
|---|
| 905 | } \
|
|---|
| 906 | while (0)
|
|---|
| 907 | #define gl_recursive_lock_destroy(NAME) \
|
|---|
| 908 | do \
|
|---|
| 909 | { \
|
|---|
| 910 | if (glthread_recursive_lock_destroy (&NAME)) \
|
|---|
| 911 | abort (); \
|
|---|
| 912 | } \
|
|---|
| 913 | while (0)
|
|---|
| 914 |
|
|---|
| 915 | /* -------------------------- gl_once_t datatype -------------------------- */
|
|---|
| 916 |
|
|---|
| 917 | #define gl_once(NAME, INITFUNCTION) \
|
|---|
| 918 | do \
|
|---|
| 919 | { \
|
|---|
| 920 | if (glthread_once (&NAME, INITFUNCTION)) \
|
|---|
| 921 | abort (); \
|
|---|
| 922 | } \
|
|---|
| 923 | while (0)
|
|---|
| 924 |
|
|---|
| 925 | /* ========================================================================= */
|
|---|
| 926 |
|
|---|
| 927 | #endif /* _LOCK_H */
|
|---|