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1 /* Copyright (C) 2006, 2008, 2009 Free Software Foundation, Inc.
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2
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3 This file is part of the GNU OpenMP Library (libgomp).
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4
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5 Libgomp is free software; you can redistribute it and/or modify it
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6 under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3, or (at your option)
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8 any later version.
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9
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10 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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11 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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12 FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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13 more details.
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14
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15 Under Section 7 of GPL version 3, you are granted additional
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16 permissions described in the GCC Runtime Library Exception, version
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17 3.1, as published by the Free Software Foundation.
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18
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19 You should have received a copy of the GNU General Public License and
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20 a copy of the GCC Runtime Library Exception along with this program;
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21 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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22 <http://www.gnu.org/licenses/>. */
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23
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24 /* This is the POSIX95 implementation of the public OpenMP locking primitives.
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25
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26 Because OpenMP uses different entry points for normal and recursive
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27 locks, and pthreads uses only one entry point, a system may be able
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28 to do better and streamline the locking as well as reduce the size
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29 of the types exported. */
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30
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31 #include "libgomp.h"
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32
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33 #ifdef HAVE_BROKEN_POSIX_SEMAPHORES
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34 void
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35 gomp_init_lock_30 (omp_lock_t *lock)
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36 {
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37 pthread_mutex_init (lock, NULL);
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38 }
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39
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40 void
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41 gomp_destroy_lock_30 (omp_lock_t *lock)
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42 {
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43 pthread_mutex_destroy (lock);
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44 }
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45
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46 void
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47 gomp_set_lock_30 (omp_lock_t *lock)
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48 {
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49 pthread_mutex_lock (lock);
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50 }
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51
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52 void
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53 gomp_unset_lock_30 (omp_lock_t *lock)
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54 {
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55 pthread_mutex_unlock (lock);
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56 }
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57
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58 int
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59 gomp_test_lock_30 (omp_lock_t *lock)
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60 {
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61 return pthread_mutex_trylock (lock) == 0;
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62 }
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63
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64 void
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65 gomp_init_nest_lock_30 (omp_nest_lock_t *lock)
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66 {
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67 pthread_mutex_init (&lock->lock, NULL);
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68 lock->owner = NULL;
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69 lock->count = 0;
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70 }
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71
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72 void
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73 gomp_destroy_nest_lock_30 (omp_nest_lock_t *lock)
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74 {
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75 pthread_mutex_destroy (&lock->lock);
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76 }
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77
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78 void
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79 gomp_set_nest_lock_30 (omp_nest_lock_t *lock)
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80 {
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81 void *me = gomp_icv (true);
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82
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83 if (lock->owner != me)
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84 {
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85 pthread_mutex_lock (&lock->lock);
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86 lock->owner = me;
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87 }
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88
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89 lock->count++;
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90 }
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91
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92 void
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93 gomp_unset_nest_lock_30 (omp_nest_lock_t *lock)
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94 {
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95 lock->count--;
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96
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97 if (lock->count == 0)
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98 {
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99 lock->owner = NULL;
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100 pthread_mutex_unlock (&lock->lock);
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101 }
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102 }
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103
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104 int
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105 gomp_test_nest_lock_30 (omp_nest_lock_t *lock)
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106 {
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107 void *me = gomp_icv (true);
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108
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109 if (lock->owner != me)
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110 {
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111 if (pthread_mutex_trylock (&lock->lock) != 0)
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112 return 0;
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113 lock->owner = me;
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114 }
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115
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116 return ++lock->count;
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117 }
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118
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119 #else
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120
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121 void
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122 gomp_init_lock_30 (omp_lock_t *lock)
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123 {
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124 sem_init (lock, 0, 1);
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125 }
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126
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127 void
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128 gomp_destroy_lock_30 (omp_lock_t *lock)
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129 {
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130 sem_destroy (lock);
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131 }
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132
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133 void
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134 gomp_set_lock_30 (omp_lock_t *lock)
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135 {
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136 while (sem_wait (lock) != 0)
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137 ;
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138 }
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139
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140 void
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141 gomp_unset_lock_30 (omp_lock_t *lock)
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142 {
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143 sem_post (lock);
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144 }
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145
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146 int
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147 gomp_test_lock_30 (omp_lock_t *lock)
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148 {
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149 return sem_trywait (lock) == 0;
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150 }
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151
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152 void
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153 gomp_init_nest_lock_30 (omp_nest_lock_t *lock)
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154 {
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155 sem_init (&lock->lock, 0, 1);
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156 lock->count = 0;
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157 lock->owner = NULL;
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158 }
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159
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160 void
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161 gomp_destroy_nest_lock_30 (omp_nest_lock_t *lock)
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162 {
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163 sem_destroy (&lock->lock);
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164 }
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165
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166 void
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167 gomp_set_nest_lock_30 (omp_nest_lock_t *lock)
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168 {
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169 void *me = gomp_icv (true);
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170
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171 if (lock->owner != me)
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172 {
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173 while (sem_wait (&lock->lock) != 0)
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174 ;
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175 lock->owner = me;
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176 }
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177 lock->count++;
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178 }
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179
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180 void
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181 gomp_unset_nest_lock_30 (omp_nest_lock_t *lock)
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182 {
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183 if (--lock->count == 0)
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184 {
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185 lock->owner = NULL;
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186 sem_post (&lock->lock);
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187 }
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188 }
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189
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190 int
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191 gomp_test_nest_lock_30 (omp_nest_lock_t *lock)
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192 {
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193 void *me = gomp_icv (true);
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194
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195 if (lock->owner != me)
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196 {
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197 if (sem_trywait (&lock->lock) != 0)
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198 return 0;
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199 lock->owner = me;
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200 }
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201
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202 return ++lock->count;
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203 }
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204 #endif
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205
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206 #ifdef LIBGOMP_GNU_SYMBOL_VERSIONING
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207 void
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208 gomp_init_lock_25 (omp_lock_25_t *lock)
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209 {
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210 pthread_mutex_init (lock, NULL);
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211 }
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212
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213 void
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214 gomp_destroy_lock_25 (omp_lock_25_t *lock)
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215 {
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216 pthread_mutex_destroy (lock);
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217 }
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218
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219 void
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220 gomp_set_lock_25 (omp_lock_25_t *lock)
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221 {
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222 pthread_mutex_lock (lock);
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223 }
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224
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225 void
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226 gomp_unset_lock_25 (omp_lock_25_t *lock)
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227 {
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228 pthread_mutex_unlock (lock);
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229 }
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230
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231 int
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232 gomp_test_lock_25 (omp_lock_25_t *lock)
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233 {
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234 return pthread_mutex_trylock (lock) == 0;
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235 }
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236
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237 void
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238 gomp_init_nest_lock_25 (omp_nest_lock_25_t *lock)
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239 {
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240 pthread_mutex_init (&lock->lock, NULL);
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241 lock->owner = (pthread_t) 0;
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242 lock->count = 0;
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243 }
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244
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245 void
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246 gomp_destroy_nest_lock_25 (omp_nest_lock_25_t *lock)
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247 {
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248 pthread_mutex_destroy (&lock->lock);
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249 }
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250
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251 void
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252 gomp_set_nest_lock_25 (omp_nest_lock_25_t *lock)
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253 {
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254 pthread_t me = pthread_self ();
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255
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256 if (lock->owner != me)
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257 {
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258 pthread_mutex_lock (&lock->lock);
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259 lock->owner = me;
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260 }
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261
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262 lock->count++;
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263 }
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264
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265 void
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266 gomp_unset_nest_lock_25 (omp_nest_lock_25_t *lock)
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267 {
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268 lock->count--;
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269
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270 if (lock->count == 0)
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271 {
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272 lock->owner = (pthread_t) 0;
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273 pthread_mutex_unlock (&lock->lock);
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274 }
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275 }
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276
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277 int
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278 gomp_test_nest_lock_25 (omp_nest_lock_25_t *lock)
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279 {
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280 pthread_t me = pthread_self ();
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281
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282 if (lock->owner != me)
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283 {
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284 if (pthread_mutex_trylock (&lock->lock) != 0)
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285 return 0;
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286 lock->owner = me;
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287 }
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288
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289 return ++lock->count;
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290 }
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291
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292 omp_lock_symver (omp_init_lock)
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293 omp_lock_symver (omp_destroy_lock)
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294 omp_lock_symver (omp_set_lock)
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295 omp_lock_symver (omp_unset_lock)
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296 omp_lock_symver (omp_test_lock)
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297 omp_lock_symver (omp_init_nest_lock)
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298 omp_lock_symver (omp_destroy_nest_lock)
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299 omp_lock_symver (omp_set_nest_lock)
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300 omp_lock_symver (omp_unset_nest_lock)
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301 omp_lock_symver (omp_test_nest_lock)
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302
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303 #else
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304
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305 ialias (omp_init_lock)
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306 ialias (omp_init_nest_lock)
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307 ialias (omp_destroy_lock)
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308 ialias (omp_destroy_nest_lock)
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309 ialias (omp_set_lock)
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310 ialias (omp_set_nest_lock)
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311 ialias (omp_unset_lock)
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312 ialias (omp_unset_nest_lock)
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313 ialias (omp_test_lock)
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314 ialias (omp_test_nest_lock)
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315
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316 #endif
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