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annotate lib/pthread.in.h @ 13706:b236a91e37b9

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pthread: add pthread_spin_destroy * lib/pthread.in.h (pthread_spin_destroy): New function.
author Paul Eggert <eggert@cs.ucla.edu>
date Mon, 20 Sep 2010 16:14:49 -0700
parents 8a0b8adde2be
children b747a553a8bb
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1 /* Implement a trivial subset of POSIX 1003.1-2008 pthread.h.
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2
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3 Copyright (C) 2009, 2010 Free Software Foundation, Inc.
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4
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5 This program is free software; you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 2, or (at your option)
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8 any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software Foundation,
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17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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19 /* Written by Paul Eggert and Glen Lenker. */
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20
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21 #ifndef _GL_PTHREAD_H_
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22 #define _GL_PTHREAD_H_
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23
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24 #include <errno.h>
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25 #include <stdlib.h>
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26 #include <sched.h>
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27 #include <sys/types.h>
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28 #include <time.h>
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30 #ifndef HAVE_PTHREAD_T
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31 typedef int pthread_t;
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32 typedef int pthread_attr_t;
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33 typedef int pthread_barrier_t;
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34 typedef int pthread_barrierattr_t;
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35 typedef int pthread_cond_t;
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36 typedef int pthread_condattr_t;
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37 typedef int pthread_key_t;
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38 typedef int pthread_mutex_t;
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39 typedef int pthread_mutexattr_t;
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40 typedef int pthread_once_t;
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41 typedef int pthread_rwlock_t;
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42 typedef int pthread_rwlockattr_t;
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43 typedef int pthread_spinlock_t;
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44 #endif
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46 #define PTHREAD_COND_INITIALIZER { 0 }
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47 #define PTHREAD_MUTEX_INITIALIZER { 0 }
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48 #define PTHREAD_ONCE_INIT { 0 }
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49 #define PTHREAD_RWLOCK_INITIALIZER { 0 }
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50
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51 #define PTHREAD_BARRIER_SERIAL_THREAD (-1)
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52
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53 #define PTHREAD_CANCEL_DEFERRED 0
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54 #define PTHREAD_CANCEL_ASYNCHRONOUS 1
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55
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56 #define PTHREAD_CANCEL_ENABLE 0
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57 #define PTHREAD_CANCEL_DISABLE 1
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58
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59 #define PTHREAD_CANCELED ((void *) -1)
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60
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61 #define PTHREAD_CREATE_JOINABLE 0
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62 #define PTHREAD_CREATE_DETACHED 1
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63
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64 #define PTHREAD_INHERIT_SCHED 0
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65 #define PTHREAD_EXPLICIT_SCHED 1
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66
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67 #define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL
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68 #define PTHREAD_MUTEX_NORMAL 0
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69 #define PTHREAD_MUTEX_ERRORCHECK 1
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70 #define PTHREAD_MUTEX_RECURSIVE 2
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71
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72 #define PTHREAD_MUTEX_STALLED 0
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73 #define PTHREAD_MUTEX_ROBUST 1
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74
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75 #define PTHREAD_PRIO_NONE 0
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76 #define PTHREAD_PRIO_INHERIT 1
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77 #define PTHREAD_PRIO_PROTECT 2
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78
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79 #define PTHREAD_PROCESS_PRIVATE 0
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80 #define PTHREAD_PROCESS_SHARED 1
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81
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82 #define PTHREAD_SCOPE_SYSTEM 0
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83 #define PTHREAD_SCOPE_PROCESS 1
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84
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85 /* Provide substitutes for the thread functions that should work
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86 adequately on a single-threaded implementation, where
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87 pthread_create always fails. The goal is to let programs compile
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88 on non-pthread hosts with minimal runtime overhead.
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89
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90 Omit interfaces that have not been analyzed and for which we do not
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91 know what to do, so that they elicit a compile-time error for
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92 now. */
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93
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94 static inline int
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95 pthread_cond_destroy (pthread_cond_t *cond)
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96 {
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97 /* COND is never seriously used. */
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98 return 0;
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99 }
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100
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101 static inline int
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102 pthread_cond_init (pthread_cond_t *restrict cond,
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103 pthread_condattr_t const *restrict attr)
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104 {
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105 /* COND is never seriously used. */
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106 return 0;
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107 }
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108
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109 static inline int
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110 pthread_cond_signal (pthread_cond_t *cond)
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111 {
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112 /* No threads can currently be blocked on COND. */
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113 return 0;
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114 }
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115
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116 static inline int
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117 pthread_cond_wait (pthread_cond_t *restrict cond,
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118 pthread_mutex_t *restrict mutex)
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119 {
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120 /* Properly-written applications never come here. */
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121 abort ();
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122 return 0;
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123 }
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124
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125 static inline int
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126 pthread_create (pthread_t *restrict thread,
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127 pthread_attr_t const *restrict attr,
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128 void * (*start_routine) (void*), void *restrict arg)
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129 {
13467
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130 /* Do not create a thread. */
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131 return EAGAIN;
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132 }
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133
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134 static inline void
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135 pthread_exit (void *value)
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136 {
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137 /* There is just one thread, so the process exits. */
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138 exit (0);
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139 }
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140
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141 static inline int
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142 pthread_join (pthread_t thread, void **pvalue)
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143 {
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144 /* Properly-written applications never come here. */
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145 abort ();
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146 return 0;
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147 }
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148
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149 static inline int
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150 pthread_mutex_destroy (pthread_mutex_t *mutex)
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151 {
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152 /* MUTEX is never seriously used. */
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153 return 0;
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154 }
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155
13467
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156 static inline int
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157 pthread_mutex_init (pthread_mutex_t *restrict mutex,
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Bruno Haible <bruno@clisp.org>
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158 pthread_mutexattr_t const *restrict attr)
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159 {
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160 /* MUTEX is never seriously used. */
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161 return 0;
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162 }
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163
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164 static inline int
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165 pthread_mutex_lock (pthread_mutex_t *mutex)
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166 {
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167 /* There is only one thread, so it always gets the lock. This
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168 implementation does not support PTHREAD_MUTEX_ERRORCHECK. */
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169 return 0;
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170 }
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171
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172 static inline int
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173 pthread_mutex_unlock (pthread_mutex_t *mutex)
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174 {
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175 /* There is only one thread, so it always unlocks successfully.
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176 This implementation does not support robust mutexes or
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177 PTHREAD_MUTEX_ERRORCHECK. */
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178 return 0;
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179 }
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180
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181 static inline int
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182 pthread_spin_init (pthread_spinlock_t *lock, int pshared)
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183 {
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184 /* LOCK is never seriously used. */
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185 return 0;
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186 }
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187
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188 static inline int
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189 pthread_spin_destroy (pthread_spinlock_t *lock)
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190 {
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191 /* LOCK is never seriously used. */
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192 return 0;
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Paul Eggert <eggert@cs.ucla.edu>
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193 }
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parents: 13479
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194
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195 static inline int
13467
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196 pthread_spin_lock (pthread_spinlock_t *lock)
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197 {
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198 /* Only one thread, so it always gets the lock. */
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199 return 0;
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200 }
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diff changeset
201
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Paul R. Eggert <eggert@cs.ucla.edu>
parents: 12559
diff changeset
202 static inline int
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Paul R. Eggert <eggert@cs.ucla.edu>
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diff changeset
203 pthread_spin_trylock (pthread_spinlock_t *lock)
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Paul R. Eggert <eggert@cs.ucla.edu>
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204 {
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Paul R. Eggert <eggert@cs.ucla.edu>
parents: 12559
diff changeset
205 /* Only one thread, so it always gets the lock. Assume that a
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diff changeset
206 thread never tries a lock that it already holds. */
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diff changeset
207 return 0;
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Paul R. Eggert <eggert@cs.ucla.edu>
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diff changeset
208 }
b3e78c51aab6 pthread: Add enough so that coreutils/src/sort.c compiles.
Paul R. Eggert <eggert@cs.ucla.edu>
parents: 12559
diff changeset
209
b3e78c51aab6 pthread: Add enough so that coreutils/src/sort.c compiles.
Paul R. Eggert <eggert@cs.ucla.edu>
parents: 12559
diff changeset
210 static inline int
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Paul R. Eggert <eggert@cs.ucla.edu>
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diff changeset
211 pthread_spin_unlock (pthread_spinlock_t *lock)
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Paul R. Eggert <eggert@cs.ucla.edu>
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diff changeset
212 {
b3e78c51aab6 pthread: Add enough so that coreutils/src/sort.c compiles.
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diff changeset
213 /* Only one thread, so spin locks are no-ops. */
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diff changeset
214 return 0;
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Paul R. Eggert <eggert@cs.ucla.edu>
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diff changeset
215 }
b3e78c51aab6 pthread: Add enough so that coreutils/src/sort.c compiles.
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216
b3e78c51aab6 pthread: Add enough so that coreutils/src/sort.c compiles.
Paul R. Eggert <eggert@cs.ucla.edu>
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diff changeset
217 #endif /* _GL_PTHREAD_H_ */