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1 /* Copyright (C) 2005-2017 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 Offloading and Multi Processing Library
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5 (libgomp).
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6
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7 Libgomp is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3, or (at your option)
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10 any later version.
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11
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12 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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14 FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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15 more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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20
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21 You should have received a copy of the GNU General Public License and
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22 a copy of the GCC Runtime Library Exception along with this program;
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23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 <http://www.gnu.org/licenses/>. */
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25
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26 /* This file defines the OpenMP API entry points that operate on internal
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27 control variables. */
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28
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29 #include "libgomp.h"
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30 #include "gomp-constants.h"
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31 #include <limits.h>
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32
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33 void
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34 omp_set_num_threads (int n)
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35 {
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36 struct gomp_task_icv *icv = gomp_icv (true);
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37 icv->nthreads_var = (n > 0 ? n : 1);
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38 }
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39
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40 void
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41 omp_set_dynamic (int val)
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42 {
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43 struct gomp_task_icv *icv = gomp_icv (true);
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44 icv->dyn_var = val;
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45 }
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46
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47 int
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48 omp_get_dynamic (void)
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49 {
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50 struct gomp_task_icv *icv = gomp_icv (false);
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51 return icv->dyn_var;
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52 }
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53
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54 void
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55 omp_set_nested (int val)
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56 {
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57 struct gomp_task_icv *icv = gomp_icv (true);
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58 icv->nest_var = val;
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59 }
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60
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61 int
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62 omp_get_nested (void)
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63 {
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64 struct gomp_task_icv *icv = gomp_icv (false);
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65 return icv->nest_var;
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66 }
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67
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68 void
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69 omp_set_schedule (omp_sched_t kind, int chunk_size)
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70 {
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71 struct gomp_task_icv *icv = gomp_icv (true);
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72 switch (kind)
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73 {
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74 case omp_sched_static:
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75 if (chunk_size < 1)
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76 chunk_size = 0;
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77 icv->run_sched_chunk_size = chunk_size;
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78 break;
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79 case omp_sched_dynamic:
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80 case omp_sched_guided:
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81 if (chunk_size < 1)
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82 chunk_size = 1;
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83 icv->run_sched_chunk_size = chunk_size;
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84 break;
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85 case omp_sched_auto:
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86 break;
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87 default:
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88 return;
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89 }
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90 icv->run_sched_var = kind;
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91 }
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92
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93 void
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94 omp_get_schedule (omp_sched_t *kind, int *chunk_size)
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95 {
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96 struct gomp_task_icv *icv = gomp_icv (false);
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97 *kind = icv->run_sched_var;
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98 *chunk_size = icv->run_sched_chunk_size;
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99 }
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100
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101 int
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102 omp_get_max_threads (void)
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103 {
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104 struct gomp_task_icv *icv = gomp_icv (false);
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105 return icv->nthreads_var;
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106 }
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107
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108 int
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109 omp_get_thread_limit (void)
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110 {
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111 struct gomp_task_icv *icv = gomp_icv (false);
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112 return icv->thread_limit_var > INT_MAX ? INT_MAX : icv->thread_limit_var;
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113 }
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114
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115 void
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116 omp_set_max_active_levels (int max_levels)
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117 {
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118 if (max_levels >= 0)
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119 gomp_max_active_levels_var = max_levels;
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120 }
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121
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122 int
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123 omp_get_max_active_levels (void)
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124 {
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125 return gomp_max_active_levels_var;
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126 }
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127
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128 int
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129 omp_get_cancellation (void)
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130 {
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131 return gomp_cancel_var;
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132 }
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133
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134 int
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135 omp_get_max_task_priority (void)
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136 {
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137 return gomp_max_task_priority_var;
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138 }
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139
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140 omp_proc_bind_t
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141 omp_get_proc_bind (void)
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142 {
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143 struct gomp_task_icv *icv = gomp_icv (false);
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144 return icv->bind_var;
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145 }
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146
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147 int
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148 omp_get_initial_device (void)
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149 {
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150 return GOMP_DEVICE_HOST_FALLBACK;
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151 }
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152
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153 int
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154 omp_get_num_places (void)
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155 {
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156 return gomp_places_list_len;
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157 }
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158
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159 int
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160 omp_get_place_num (void)
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161 {
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162 if (gomp_places_list == NULL)
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163 return -1;
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164
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165 struct gomp_thread *thr = gomp_thread ();
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166 if (thr->place == 0)
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167 gomp_init_affinity ();
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168
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169 return (int) thr->place - 1;
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170 }
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171
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172 int
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173 omp_get_partition_num_places (void)
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174 {
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175 if (gomp_places_list == NULL)
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176 return 0;
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177
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178 struct gomp_thread *thr = gomp_thread ();
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179 if (thr->place == 0)
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180 gomp_init_affinity ();
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181
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182 return thr->ts.place_partition_len;
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183 }
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184
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185 void
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186 omp_get_partition_place_nums (int *place_nums)
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187 {
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188 if (gomp_places_list == NULL)
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189 return;
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190
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191 struct gomp_thread *thr = gomp_thread ();
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192 if (thr->place == 0)
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193 gomp_init_affinity ();
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194
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195 unsigned int i;
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196 for (i = 0; i < thr->ts.place_partition_len; i++)
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197 *place_nums++ = thr->ts.place_partition_off + i;
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198 }
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199
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200 ialias (omp_set_dynamic)
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201 ialias (omp_set_nested)
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202 ialias (omp_set_num_threads)
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203 ialias (omp_get_dynamic)
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204 ialias (omp_get_nested)
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205 ialias (omp_set_schedule)
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206 ialias (omp_get_schedule)
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207 ialias (omp_get_max_threads)
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208 ialias (omp_get_thread_limit)
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209 ialias (omp_set_max_active_levels)
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210 ialias (omp_get_max_active_levels)
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211 ialias (omp_get_cancellation)
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212 ialias (omp_get_proc_bind)
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213 ialias (omp_get_initial_device)
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214 ialias (omp_get_max_task_priority)
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215 ialias (omp_get_num_places)
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216 ialias (omp_get_place_num)
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217 ialias (omp_get_partition_num_places)
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218 ialias (omp_get_partition_place_nums)
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