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1 /* Copyright (C) 2005, 2008, 2009 Free Software Foundation, Inc.
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2 Contributed by Richard Henderson <rth@redhat.com>.
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3
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4 This file is part of the GNU OpenMP Library (libgomp).
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5
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6 Libgomp is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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13 FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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14 more details.
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15
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16 Under Section 7 of GPL version 3, you are granted additional
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17 permissions described in the GCC Runtime Library Exception, version
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18 3.1, as published by the Free Software Foundation.
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19
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20 You should have received a copy of the GNU General Public License and
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21 a copy of the GCC Runtime Library Exception along with this program;
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22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 <http://www.gnu.org/licenses/>. */
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24
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25 /* This is the default PTHREADS implementation of the public OpenMP
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26 locking primitives.
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27
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28 Because OpenMP uses different entry points for normal and recursive
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29 locks, and pthreads uses only one entry point, a system may be able
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30 to do better and streamline the locking as well as reduce the size
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31 of the types exported. */
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32
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33 /* We need Unix98 extensions to get recursive locks. On Tru64 UNIX V4.0F,
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34 the declarations are available without _XOPEN_SOURCE, which actually
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35 breaks compilation. */
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36 #ifndef __osf__
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37 #define _XOPEN_SOURCE 500
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38 #endif
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39
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40 #include "libgomp.h"
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41
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42 #ifdef HAVE_BROKEN_POSIX_SEMAPHORES
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43 void
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44 gomp_init_lock_30 (omp_lock_t *lock)
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45 {
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46 pthread_mutex_init (lock, NULL);
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47 }
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48
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49 void
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50 gomp_destroy_lock_30 (omp_lock_t *lock)
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51 {
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52 pthread_mutex_destroy (lock);
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53 }
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54
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55 void
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56 gomp_set_lock_30 (omp_lock_t *lock)
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57 {
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58 pthread_mutex_lock (lock);
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59 }
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60
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61 void
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62 gomp_unset_lock_30 (omp_lock_t *lock)
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63 {
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64 pthread_mutex_unlock (lock);
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65 }
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66
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67 int
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68 gomp_test_lock_30 (omp_lock_t *lock)
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69 {
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70 return pthread_mutex_trylock (lock) == 0;
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71 }
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72
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73 void
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74 gomp_init_nest_lock_30 (omp_nest_lock_t *lock)
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75 {
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76 pthread_mutex_init (&lock->lock, NULL);
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77 lock->count = 0;
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78 lock->owner = NULL;
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79 }
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80
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81 void
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82 gomp_destroy_nest_lock_30 (omp_nest_lock_t *lock)
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83 {
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84 pthread_mutex_destroy (&lock->lock);
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85 }
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86
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87 void
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88 gomp_set_nest_lock_30 (omp_nest_lock_t *lock)
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89 {
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90 void *me = gomp_icv (true);
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91
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92 if (lock->owner != me)
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93 {
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94 pthread_mutex_lock (&lock->lock);
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95 lock->owner = me;
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96 }
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97 lock->count++;
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98 }
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99
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100 void
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101 gomp_unset_nest_lock_30 (omp_nest_lock_t *lock)
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102 {
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103 if (--lock->count == 0)
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104 {
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105 lock->owner = NULL;
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106 pthread_mutex_unlock (&lock->lock);
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107 }
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108 }
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109
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110 int
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111 gomp_test_nest_lock_30 (omp_nest_lock_t *lock)
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112 {
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113 void *me = gomp_icv (true);
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114
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115 if (lock->owner != me)
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116 {
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117 if (pthread_mutex_trylock (&lock->lock) != 0)
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118 return 0;
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119 lock->owner = me;
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120 }
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121
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122 return ++lock->count;
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123 }
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124
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125 #else
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126
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127 void
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128 gomp_init_lock_30 (omp_lock_t *lock)
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129 {
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130 sem_init (lock, 0, 1);
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131 }
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132
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133 void
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134 gomp_destroy_lock_30 (omp_lock_t *lock)
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135 {
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136 sem_destroy (lock);
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137 }
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138
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139 void
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140 gomp_set_lock_30 (omp_lock_t *lock)
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141 {
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142 while (sem_wait (lock) != 0)
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143 ;
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144 }
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145
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146 void
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147 gomp_unset_lock_30 (omp_lock_t *lock)
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148 {
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149 sem_post (lock);
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150 }
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151
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152 int
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153 gomp_test_lock_30 (omp_lock_t *lock)
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154 {
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155 return sem_trywait (lock) == 0;
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156 }
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157
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158 void
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159 gomp_init_nest_lock_30 (omp_nest_lock_t *lock)
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160 {
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161 sem_init (&lock->lock, 0, 1);
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162 lock->count = 0;
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163 lock->owner = NULL;
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164 }
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165
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166 void
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167 gomp_destroy_nest_lock_30 (omp_nest_lock_t *lock)
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168 {
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169 sem_destroy (&lock->lock);
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170 }
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171
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172 void
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173 gomp_set_nest_lock_30 (omp_nest_lock_t *lock)
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174 {
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175 void *me = gomp_icv (true);
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176
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177 if (lock->owner != me)
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178 {
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179 while (sem_wait (&lock->lock) != 0)
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180 ;
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181 lock->owner = me;
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182 }
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183 lock->count++;
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184 }
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185
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186 void
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187 gomp_unset_nest_lock_30 (omp_nest_lock_t *lock)
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188 {
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189 if (--lock->count == 0)
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190 {
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191 lock->owner = NULL;
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192 sem_post (&lock->lock);
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193 }
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194 }
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195
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196 int
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197 gomp_test_nest_lock_30 (omp_nest_lock_t *lock)
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198 {
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199 void *me = gomp_icv (true);
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200
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201 if (lock->owner != me)
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202 {
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203 if (sem_trywait (&lock->lock) != 0)
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204 return 0;
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205 lock->owner = me;
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206 }
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207
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208 return ++lock->count;
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209 }
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210 #endif
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211
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212 #ifdef LIBGOMP_GNU_SYMBOL_VERSIONING
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213 void
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214 gomp_init_lock_25 (omp_lock_25_t *lock)
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215 {
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216 pthread_mutex_init (lock, NULL);
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217 }
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218
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219 void
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220 gomp_destroy_lock_25 (omp_lock_25_t *lock)
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221 {
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222 pthread_mutex_destroy (lock);
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223 }
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224
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225 void
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226 gomp_set_lock_25 (omp_lock_25_t *lock)
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227 {
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228 pthread_mutex_lock (lock);
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229 }
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230
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231 void
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232 gomp_unset_lock_25 (omp_lock_25_t *lock)
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233 {
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234 pthread_mutex_unlock (lock);
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235 }
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236
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237 int
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238 gomp_test_lock_25 (omp_lock_25_t *lock)
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239 {
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240 return pthread_mutex_trylock (lock) == 0;
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241 }
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242
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243 void
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244 gomp_init_nest_lock_25 (omp_nest_lock_25_t *lock)
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245 {
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246 pthread_mutexattr_t attr;
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247
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248 pthread_mutexattr_init (&attr);
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249 pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE);
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250 pthread_mutex_init (&lock->lock, &attr);
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251 lock->count = 0;
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252 pthread_mutexattr_destroy (&attr);
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253 }
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254
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255 void
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256 gomp_destroy_nest_lock_25 (omp_nest_lock_25_t *lock)
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257 {
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258 pthread_mutex_destroy (&lock->lock);
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259 }
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260
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261 void
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262 gomp_set_nest_lock_25 (omp_nest_lock_25_t *lock)
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263 {
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264 pthread_mutex_lock (&lock->lock);
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265 lock->count++;
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266 }
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267
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268 void
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269 gomp_unset_nest_lock_25 (omp_nest_lock_25_t *lock)
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270 {
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271 lock->count--;
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272 pthread_mutex_unlock (&lock->lock);
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273 }
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274
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275 int
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276 gomp_test_nest_lock_25 (omp_nest_lock_25_t *lock)
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277 {
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278 if (pthread_mutex_trylock (&lock->lock) == 0)
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279 return ++lock->count;
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280 return 0;
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281 }
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282
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283 omp_lock_symver (omp_init_lock)
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284 omp_lock_symver (omp_destroy_lock)
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285 omp_lock_symver (omp_set_lock)
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286 omp_lock_symver (omp_unset_lock)
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287 omp_lock_symver (omp_test_lock)
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288 omp_lock_symver (omp_init_nest_lock)
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289 omp_lock_symver (omp_destroy_nest_lock)
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290 omp_lock_symver (omp_set_nest_lock)
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291 omp_lock_symver (omp_unset_nest_lock)
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292 omp_lock_symver (omp_test_nest_lock)
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293
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294 #else
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295
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296 ialias (omp_init_lock)
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297 ialias (omp_init_nest_lock)
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298 ialias (omp_destroy_lock)
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299 ialias (omp_destroy_nest_lock)
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300 ialias (omp_set_lock)
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301 ialias (omp_set_nest_lock)
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302 ialias (omp_unset_lock)
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303 ialias (omp_unset_nest_lock)
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304 ialias (omp_test_lock)
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305 ialias (omp_test_nest_lock)
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306
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307 #endif
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