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80f046cc JJ |
1 | /* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 |
2 | Free Software Foundation, Inc. | |
953ff289 DN |
3 | Contributed by Richard Henderson <rth@redhat.com>. |
4 | ||
5 | This file is part of the GNU OpenMP Library (libgomp). | |
6 | ||
7 | Libgomp is free software; you can redistribute it and/or modify it | |
748086b7 JJ |
8 | under the terms of the GNU General Public License as published by |
9 | the Free Software Foundation; either version 3, or (at your option) | |
10 | any later version. | |
953ff289 DN |
11 | |
12 | Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
748086b7 | 14 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
953ff289 DN |
15 | more details. |
16 | ||
748086b7 JJ |
17 | Under Section 7 of GPL version 3, you are granted additional |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
953ff289 | 20 | |
748086b7 JJ |
21 | You should have received a copy of the GNU General Public License and |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
953ff289 DN |
25 | |
26 | /* This file defines the OpenMP internal control variables, and arranges | |
27 | for them to be initialized from environment variables at startup. */ | |
28 | ||
29 | #include "libgomp.h" | |
30 | #include "libgomp_f.h" | |
89b3e3cd | 31 | #include <ctype.h> |
953ff289 | 32 | #include <stdlib.h> |
a1b25e49 PG |
33 | #ifdef STRING_WITH_STRINGS |
34 | # include <string.h> | |
35 | # include <strings.h> | |
36 | #else | |
37 | # ifdef HAVE_STRING_H | |
38 | # include <string.h> | |
39 | # else | |
40 | # ifdef HAVE_STRINGS_H | |
41 | # include <strings.h> | |
42 | # endif | |
43 | # endif | |
44 | #endif | |
d0d1b24d RH |
45 | #include <limits.h> |
46 | #include <errno.h> | |
953ff289 | 47 | |
976e44e3 JJ |
48 | #ifndef HAVE_STRTOULL |
49 | # define strtoull(ptr, eptr, base) strtoul (ptr, eptr, base) | |
50 | #endif | |
953ff289 | 51 | |
a68ab351 JJ |
52 | struct gomp_task_icv gomp_global_icv = { |
53 | .nthreads_var = 1, | |
54 | .run_sched_var = GFS_DYNAMIC, | |
55 | .run_sched_modifier = 1, | |
56 | .dyn_var = false, | |
57 | .nest_var = false | |
58 | }; | |
59 | ||
a0884cf0 JJ |
60 | unsigned short *gomp_cpu_affinity; |
61 | size_t gomp_cpu_affinity_len; | |
a68ab351 JJ |
62 | unsigned long gomp_max_active_levels_var = INT_MAX; |
63 | unsigned long gomp_thread_limit_var = ULONG_MAX; | |
64 | unsigned long gomp_remaining_threads_count; | |
65 | #ifndef HAVE_SYNC_BUILTINS | |
66 | gomp_mutex_t gomp_remaining_threads_lock; | |
67 | #endif | |
68 | unsigned long gomp_available_cpus = 1, gomp_managed_threads = 1; | |
69 | unsigned long long gomp_spin_count_var, gomp_throttled_spin_count_var; | |
953ff289 DN |
70 | |
71 | /* Parse the OMP_SCHEDULE environment variable. */ | |
72 | ||
73 | static void | |
74 | parse_schedule (void) | |
75 | { | |
76 | char *env, *end; | |
6acf0b38 | 77 | unsigned long value; |
953ff289 DN |
78 | |
79 | env = getenv ("OMP_SCHEDULE"); | |
80 | if (env == NULL) | |
81 | return; | |
82 | ||
89b3e3cd JJ |
83 | while (isspace ((unsigned char) *env)) |
84 | ++env; | |
85 | if (strncasecmp (env, "static", 6) == 0) | |
953ff289 | 86 | { |
a68ab351 | 87 | gomp_global_icv.run_sched_var = GFS_STATIC; |
953ff289 DN |
88 | env += 6; |
89 | } | |
89b3e3cd | 90 | else if (strncasecmp (env, "dynamic", 7) == 0) |
953ff289 | 91 | { |
a68ab351 | 92 | gomp_global_icv.run_sched_var = GFS_DYNAMIC; |
953ff289 DN |
93 | env += 7; |
94 | } | |
89b3e3cd | 95 | else if (strncasecmp (env, "guided", 6) == 0) |
953ff289 | 96 | { |
a68ab351 | 97 | gomp_global_icv.run_sched_var = GFS_GUIDED; |
953ff289 DN |
98 | env += 6; |
99 | } | |
a68ab351 JJ |
100 | else if (strncasecmp (env, "auto", 4) == 0) |
101 | { | |
102 | gomp_global_icv.run_sched_var = GFS_AUTO; | |
103 | env += 4; | |
104 | } | |
953ff289 DN |
105 | else |
106 | goto unknown; | |
107 | ||
89b3e3cd JJ |
108 | while (isspace ((unsigned char) *env)) |
109 | ++env; | |
953ff289 DN |
110 | if (*env == '\0') |
111 | return; | |
89b3e3cd | 112 | if (*env++ != ',') |
953ff289 | 113 | goto unknown; |
89b3e3cd JJ |
114 | while (isspace ((unsigned char) *env)) |
115 | ++env; | |
953ff289 | 116 | if (*env == '\0') |
953ff289 DN |
117 | goto invalid; |
118 | ||
6acf0b38 UB |
119 | errno = 0; |
120 | value = strtoul (env, &end, 10); | |
121 | if (errno) | |
122 | goto invalid; | |
123 | ||
89b3e3cd JJ |
124 | while (isspace ((unsigned char) *end)) |
125 | ++end; | |
953ff289 DN |
126 | if (*end != '\0') |
127 | goto invalid; | |
6acf0b38 | 128 | |
a68ab351 JJ |
129 | if ((int)value != value) |
130 | goto invalid; | |
131 | ||
132 | gomp_global_icv.run_sched_modifier = value; | |
953ff289 DN |
133 | return; |
134 | ||
135 | unknown: | |
136 | gomp_error ("Unknown value for environment variable OMP_SCHEDULE"); | |
137 | return; | |
138 | ||
139 | invalid: | |
140 | gomp_error ("Invalid value for chunk size in " | |
141 | "environment variable OMP_SCHEDULE"); | |
953ff289 DN |
142 | return; |
143 | } | |
144 | ||
a68ab351 | 145 | /* Parse an unsigned long environment variable. Return true if one was |
953ff289 DN |
146 | present and it was successfully parsed. */ |
147 | ||
148 | static bool | |
80f046cc | 149 | parse_unsigned_long (const char *name, unsigned long *pvalue, bool allow_zero) |
953ff289 DN |
150 | { |
151 | char *env, *end; | |
d0d1b24d | 152 | unsigned long value; |
953ff289 | 153 | |
d0d1b24d | 154 | env = getenv (name); |
953ff289 DN |
155 | if (env == NULL) |
156 | return false; | |
157 | ||
89b3e3cd JJ |
158 | while (isspace ((unsigned char) *env)) |
159 | ++env; | |
953ff289 DN |
160 | if (*env == '\0') |
161 | goto invalid; | |
162 | ||
6acf0b38 | 163 | errno = 0; |
d0d1b24d | 164 | value = strtoul (env, &end, 10); |
80f046cc | 165 | if (errno || (long) value <= 0 - allow_zero) |
6acf0b38 UB |
166 | goto invalid; |
167 | ||
89b3e3cd JJ |
168 | while (isspace ((unsigned char) *end)) |
169 | ++end; | |
953ff289 DN |
170 | if (*end != '\0') |
171 | goto invalid; | |
d0d1b24d RH |
172 | |
173 | *pvalue = value; | |
953ff289 DN |
174 | return true; |
175 | ||
176 | invalid: | |
d0d1b24d | 177 | gomp_error ("Invalid value for environment variable %s", name); |
953ff289 DN |
178 | return false; |
179 | } | |
180 | ||
a68ab351 JJ |
181 | /* Parse the OMP_STACKSIZE environment varible. Return true if one was |
182 | present and it was successfully parsed. */ | |
183 | ||
184 | static bool | |
185 | parse_stacksize (const char *name, unsigned long *pvalue) | |
186 | { | |
187 | char *env, *end; | |
188 | unsigned long value, shift = 10; | |
189 | ||
190 | env = getenv (name); | |
191 | if (env == NULL) | |
192 | return false; | |
193 | ||
194 | while (isspace ((unsigned char) *env)) | |
195 | ++env; | |
196 | if (*env == '\0') | |
197 | goto invalid; | |
198 | ||
199 | errno = 0; | |
200 | value = strtoul (env, &end, 10); | |
201 | if (errno) | |
202 | goto invalid; | |
203 | ||
204 | while (isspace ((unsigned char) *end)) | |
205 | ++end; | |
206 | if (*end != '\0') | |
207 | { | |
323ff903 | 208 | switch (tolower ((unsigned char) *end)) |
a68ab351 JJ |
209 | { |
210 | case 'b': | |
211 | shift = 0; | |
212 | break; | |
213 | case 'k': | |
214 | break; | |
215 | case 'm': | |
216 | shift = 20; | |
217 | break; | |
218 | case 'g': | |
219 | shift = 30; | |
220 | break; | |
221 | default: | |
222 | goto invalid; | |
223 | } | |
224 | ++end; | |
225 | while (isspace ((unsigned char) *end)) | |
226 | ++end; | |
227 | if (*end != '\0') | |
228 | goto invalid; | |
229 | } | |
230 | ||
231 | if (((value << shift) >> shift) != value) | |
232 | goto invalid; | |
233 | ||
234 | *pvalue = value << shift; | |
235 | return true; | |
236 | ||
237 | invalid: | |
238 | gomp_error ("Invalid value for environment variable %s", name); | |
239 | return false; | |
240 | } | |
241 | ||
242 | /* Parse the GOMP_SPINCOUNT environment varible. Return true if one was | |
243 | present and it was successfully parsed. */ | |
244 | ||
245 | static bool | |
246 | parse_spincount (const char *name, unsigned long long *pvalue) | |
247 | { | |
248 | char *env, *end; | |
249 | unsigned long long value, mult = 1; | |
250 | ||
251 | env = getenv (name); | |
252 | if (env == NULL) | |
253 | return false; | |
254 | ||
255 | while (isspace ((unsigned char) *env)) | |
256 | ++env; | |
257 | if (*env == '\0') | |
258 | goto invalid; | |
259 | ||
260 | if (strncasecmp (env, "infinite", 8) == 0 | |
261 | || strncasecmp (env, "infinity", 8) == 0) | |
262 | { | |
263 | value = ~0ULL; | |
264 | end = env + 8; | |
265 | goto check_tail; | |
266 | } | |
267 | ||
268 | errno = 0; | |
269 | value = strtoull (env, &end, 10); | |
270 | if (errno) | |
271 | goto invalid; | |
272 | ||
273 | while (isspace ((unsigned char) *end)) | |
274 | ++end; | |
275 | if (*end != '\0') | |
276 | { | |
323ff903 | 277 | switch (tolower ((unsigned char) *end)) |
a68ab351 JJ |
278 | { |
279 | case 'k': | |
280 | mult = 1000LL; | |
281 | break; | |
282 | case 'm': | |
283 | mult = 1000LL * 1000LL; | |
284 | break; | |
285 | case 'g': | |
286 | mult = 1000LL * 1000LL * 1000LL; | |
287 | break; | |
288 | case 't': | |
289 | mult = 1000LL * 1000LL * 1000LL * 1000LL; | |
290 | break; | |
291 | default: | |
292 | goto invalid; | |
293 | } | |
294 | ++end; | |
295 | check_tail: | |
296 | while (isspace ((unsigned char) *end)) | |
297 | ++end; | |
298 | if (*end != '\0') | |
299 | goto invalid; | |
300 | } | |
301 | ||
302 | if (value > ~0ULL / mult) | |
303 | value = ~0ULL; | |
304 | else | |
305 | value *= mult; | |
306 | ||
307 | *pvalue = value; | |
308 | return true; | |
309 | ||
310 | invalid: | |
311 | gomp_error ("Invalid value for environment variable %s", name); | |
312 | return false; | |
313 | } | |
314 | ||
315 | /* Parse a boolean value for environment variable NAME and store the | |
953ff289 DN |
316 | result in VALUE. */ |
317 | ||
318 | static void | |
319 | parse_boolean (const char *name, bool *value) | |
320 | { | |
321 | const char *env; | |
322 | ||
323 | env = getenv (name); | |
324 | if (env == NULL) | |
325 | return; | |
326 | ||
89b3e3cd JJ |
327 | while (isspace ((unsigned char) *env)) |
328 | ++env; | |
329 | if (strncasecmp (env, "true", 4) == 0) | |
330 | { | |
331 | *value = true; | |
332 | env += 4; | |
333 | } | |
334 | else if (strncasecmp (env, "false", 5) == 0) | |
335 | { | |
336 | *value = false; | |
337 | env += 5; | |
338 | } | |
953ff289 | 339 | else |
89b3e3cd JJ |
340 | env = "X"; |
341 | while (isspace ((unsigned char) *env)) | |
342 | ++env; | |
343 | if (*env != '\0') | |
d0d1b24d | 344 | gomp_error ("Invalid value for environment variable %s", name); |
953ff289 DN |
345 | } |
346 | ||
a68ab351 JJ |
347 | /* Parse the OMP_WAIT_POLICY environment variable and store the |
348 | result in gomp_active_wait_policy. */ | |
349 | ||
350 | static int | |
351 | parse_wait_policy (void) | |
352 | { | |
353 | const char *env; | |
354 | int ret = -1; | |
355 | ||
356 | env = getenv ("OMP_WAIT_POLICY"); | |
357 | if (env == NULL) | |
358 | return -1; | |
359 | ||
360 | while (isspace ((unsigned char) *env)) | |
361 | ++env; | |
362 | if (strncasecmp (env, "active", 6) == 0) | |
363 | { | |
364 | ret = 1; | |
365 | env += 6; | |
366 | } | |
367 | else if (strncasecmp (env, "passive", 7) == 0) | |
368 | { | |
369 | ret = 0; | |
370 | env += 7; | |
371 | } | |
372 | else | |
373 | env = "X"; | |
374 | while (isspace ((unsigned char) *env)) | |
375 | ++env; | |
376 | if (*env == '\0') | |
377 | return ret; | |
378 | gomp_error ("Invalid value for environment variable OMP_WAIT_POLICY"); | |
379 | return -1; | |
380 | } | |
381 | ||
a0884cf0 JJ |
382 | /* Parse the GOMP_CPU_AFFINITY environment varible. Return true if one was |
383 | present and it was successfully parsed. */ | |
384 | ||
385 | static bool | |
386 | parse_affinity (void) | |
387 | { | |
388 | char *env, *end; | |
389 | unsigned long cpu_beg, cpu_end, cpu_stride; | |
390 | unsigned short *cpus = NULL; | |
391 | size_t allocated = 0, used = 0, needed; | |
392 | ||
393 | env = getenv ("GOMP_CPU_AFFINITY"); | |
394 | if (env == NULL) | |
395 | return false; | |
396 | ||
397 | do | |
398 | { | |
399 | while (*env == ' ' || *env == '\t') | |
400 | env++; | |
401 | ||
402 | cpu_beg = strtoul (env, &end, 0); | |
403 | cpu_end = cpu_beg; | |
404 | cpu_stride = 1; | |
405 | if (env == end || cpu_beg >= 65536) | |
406 | goto invalid; | |
407 | ||
408 | env = end; | |
409 | if (*env == '-') | |
410 | { | |
411 | cpu_end = strtoul (++env, &end, 0); | |
412 | if (env == end || cpu_end >= 65536 || cpu_end < cpu_beg) | |
413 | goto invalid; | |
414 | ||
415 | env = end; | |
416 | if (*env == ':') | |
417 | { | |
418 | cpu_stride = strtoul (++env, &end, 0); | |
419 | if (env == end || cpu_stride == 0 || cpu_stride >= 65536) | |
420 | goto invalid; | |
421 | ||
422 | env = end; | |
423 | } | |
424 | } | |
425 | ||
426 | needed = (cpu_end - cpu_beg) / cpu_stride + 1; | |
427 | if (used + needed >= allocated) | |
428 | { | |
429 | unsigned short *new_cpus; | |
430 | ||
431 | if (allocated < 64) | |
432 | allocated = 64; | |
433 | if (allocated > needed) | |
434 | allocated <<= 1; | |
435 | else | |
436 | allocated += 2 * needed; | |
437 | new_cpus = realloc (cpus, allocated * sizeof (unsigned short)); | |
438 | if (new_cpus == NULL) | |
439 | { | |
440 | free (cpus); | |
441 | gomp_error ("not enough memory to store GOMP_CPU_AFFINITY list"); | |
442 | return false; | |
443 | } | |
444 | ||
445 | cpus = new_cpus; | |
446 | } | |
447 | ||
448 | while (needed--) | |
449 | { | |
450 | cpus[used++] = cpu_beg; | |
451 | cpu_beg += cpu_stride; | |
452 | } | |
453 | ||
454 | while (*env == ' ' || *env == '\t') | |
455 | env++; | |
456 | ||
457 | if (*env == ',') | |
458 | env++; | |
459 | else if (*env == '\0') | |
460 | break; | |
461 | } | |
462 | while (1); | |
463 | ||
464 | gomp_cpu_affinity = cpus; | |
465 | gomp_cpu_affinity_len = used; | |
466 | return true; | |
467 | ||
468 | invalid: | |
469 | gomp_error ("Invalid value for enviroment variable GOMP_CPU_AFFINITY"); | |
470 | return false; | |
471 | } | |
472 | ||
953ff289 DN |
473 | static void __attribute__((constructor)) |
474 | initialize_env (void) | |
475 | { | |
d0d1b24d | 476 | unsigned long stacksize; |
a68ab351 | 477 | int wait_policy; |
d0d1b24d | 478 | |
953ff289 DN |
479 | /* Do a compile time check that mkomp_h.pl did good job. */ |
480 | omp_check_defines (); | |
481 | ||
482 | parse_schedule (); | |
a68ab351 JJ |
483 | parse_boolean ("OMP_DYNAMIC", &gomp_global_icv.dyn_var); |
484 | parse_boolean ("OMP_NESTED", &gomp_global_icv.nest_var); | |
80f046cc JJ |
485 | parse_unsigned_long ("OMP_MAX_ACTIVE_LEVELS", &gomp_max_active_levels_var, |
486 | true); | |
487 | parse_unsigned_long ("OMP_THREAD_LIMIT", &gomp_thread_limit_var, false); | |
a68ab351 | 488 | if (gomp_thread_limit_var != ULONG_MAX) |
9c4e59e0 | 489 | gomp_remaining_threads_count = gomp_thread_limit_var - 1; |
a68ab351 | 490 | #ifndef HAVE_SYNC_BUILTINS |
9c4e59e0 | 491 | gomp_mutex_init (&gomp_remaining_threads_lock); |
a68ab351 | 492 | #endif |
a68ab351 JJ |
493 | gomp_init_num_threads (); |
494 | gomp_available_cpus = gomp_global_icv.nthreads_var; | |
80f046cc JJ |
495 | if (!parse_unsigned_long ("OMP_NUM_THREADS", &gomp_global_icv.nthreads_var, |
496 | false)) | |
a68ab351 | 497 | gomp_global_icv.nthreads_var = gomp_available_cpus; |
a0884cf0 JJ |
498 | if (parse_affinity ()) |
499 | gomp_init_affinity (); | |
a68ab351 JJ |
500 | wait_policy = parse_wait_policy (); |
501 | if (!parse_spincount ("GOMP_SPINCOUNT", &gomp_spin_count_var)) | |
502 | { | |
503 | /* Using a rough estimation of 100000 spins per msec, | |
504 | use 5 min blocking for OMP_WAIT_POLICY=active, | |
4c698cf8 | 505 | 3 msec blocking when OMP_WAIT_POLICY is not specificed |
a68ab351 JJ |
506 | and 0 when OMP_WAIT_POLICY=passive. |
507 | Depending on the CPU speed, this can be e.g. 5 times longer | |
508 | or 5 times shorter. */ | |
509 | if (wait_policy > 0) | |
510 | gomp_spin_count_var = 30000000000LL; | |
511 | else if (wait_policy < 0) | |
4c698cf8 | 512 | gomp_spin_count_var = 300000LL; |
a68ab351 JJ |
513 | } |
514 | /* gomp_throttled_spin_count_var is used when there are more libgomp | |
515 | managed threads than available CPUs. Use very short spinning. */ | |
516 | if (wait_policy > 0) | |
517 | gomp_throttled_spin_count_var = 1000LL; | |
518 | else if (wait_policy < 0) | |
519 | gomp_throttled_spin_count_var = 100LL; | |
520 | if (gomp_throttled_spin_count_var > gomp_spin_count_var) | |
521 | gomp_throttled_spin_count_var = gomp_spin_count_var; | |
d0d1b24d RH |
522 | |
523 | /* Not strictly environment related, but ordering constructors is tricky. */ | |
524 | pthread_attr_init (&gomp_thread_attr); | |
525 | pthread_attr_setdetachstate (&gomp_thread_attr, PTHREAD_CREATE_DETACHED); | |
526 | ||
a68ab351 JJ |
527 | if (parse_stacksize ("OMP_STACKSIZE", &stacksize) |
528 | || parse_stacksize ("GOMP_STACKSIZE", &stacksize)) | |
d0d1b24d | 529 | { |
c3b11a40 RH |
530 | int err; |
531 | ||
c3b11a40 RH |
532 | err = pthread_attr_setstacksize (&gomp_thread_attr, stacksize); |
533 | ||
534 | #ifdef PTHREAD_STACK_MIN | |
535 | if (err == EINVAL) | |
d0d1b24d | 536 | { |
c3b11a40 RH |
537 | if (stacksize < PTHREAD_STACK_MIN) |
538 | gomp_error ("Stack size less than minimum of %luk", | |
539 | PTHREAD_STACK_MIN / 1024ul | |
540 | + (PTHREAD_STACK_MIN % 1024 != 0)); | |
541 | else | |
d0d1b24d | 542 | gomp_error ("Stack size larger than system limit"); |
d0d1b24d | 543 | } |
c3b11a40 RH |
544 | else |
545 | #endif | |
546 | if (err != 0) | |
547 | gomp_error ("Stack size change failed: %s", strerror (err)); | |
d0d1b24d | 548 | } |
953ff289 DN |
549 | } |
550 | ||
551 | \f | |
552 | /* The public OpenMP API routines that access these variables. */ | |
553 | ||
554 | void | |
555 | omp_set_num_threads (int n) | |
556 | { | |
a68ab351 JJ |
557 | struct gomp_task_icv *icv = gomp_icv (true); |
558 | icv->nthreads_var = (n > 0 ? n : 1); | |
953ff289 DN |
559 | } |
560 | ||
561 | void | |
562 | omp_set_dynamic (int val) | |
563 | { | |
a68ab351 JJ |
564 | struct gomp_task_icv *icv = gomp_icv (true); |
565 | icv->dyn_var = val; | |
953ff289 DN |
566 | } |
567 | ||
568 | int | |
569 | omp_get_dynamic (void) | |
570 | { | |
a68ab351 JJ |
571 | struct gomp_task_icv *icv = gomp_icv (false); |
572 | return icv->dyn_var; | |
953ff289 DN |
573 | } |
574 | ||
575 | void | |
576 | omp_set_nested (int val) | |
577 | { | |
a68ab351 JJ |
578 | struct gomp_task_icv *icv = gomp_icv (true); |
579 | icv->nest_var = val; | |
953ff289 DN |
580 | } |
581 | ||
582 | int | |
583 | omp_get_nested (void) | |
584 | { | |
a68ab351 JJ |
585 | struct gomp_task_icv *icv = gomp_icv (false); |
586 | return icv->nest_var; | |
587 | } | |
588 | ||
589 | void | |
590 | omp_set_schedule (omp_sched_t kind, int modifier) | |
591 | { | |
592 | struct gomp_task_icv *icv = gomp_icv (true); | |
593 | switch (kind) | |
594 | { | |
595 | case omp_sched_static: | |
596 | if (modifier < 1) | |
597 | modifier = 0; | |
598 | icv->run_sched_modifier = modifier; | |
599 | break; | |
600 | case omp_sched_dynamic: | |
601 | case omp_sched_guided: | |
602 | if (modifier < 1) | |
603 | modifier = 1; | |
604 | icv->run_sched_modifier = modifier; | |
605 | break; | |
606 | case omp_sched_auto: | |
607 | break; | |
608 | default: | |
609 | return; | |
610 | } | |
611 | icv->run_sched_var = kind; | |
612 | } | |
613 | ||
614 | void | |
615 | omp_get_schedule (omp_sched_t *kind, int *modifier) | |
616 | { | |
617 | struct gomp_task_icv *icv = gomp_icv (false); | |
618 | *kind = icv->run_sched_var; | |
619 | *modifier = icv->run_sched_modifier; | |
620 | } | |
621 | ||
622 | int | |
623 | omp_get_max_threads (void) | |
624 | { | |
625 | struct gomp_task_icv *icv = gomp_icv (false); | |
626 | return icv->nthreads_var; | |
627 | } | |
628 | ||
629 | int | |
630 | omp_get_thread_limit (void) | |
631 | { | |
632 | return gomp_thread_limit_var > INT_MAX ? INT_MAX : gomp_thread_limit_var; | |
633 | } | |
634 | ||
635 | void | |
636 | omp_set_max_active_levels (int max_levels) | |
637 | { | |
80f046cc | 638 | if (max_levels >= 0) |
a68ab351 JJ |
639 | gomp_max_active_levels_var = max_levels; |
640 | } | |
641 | ||
642 | int | |
643 | omp_get_max_active_levels (void) | |
644 | { | |
645 | return gomp_max_active_levels_var; | |
953ff289 DN |
646 | } |
647 | ||
648 | ialias (omp_set_dynamic) | |
649 | ialias (omp_set_nested) | |
650 | ialias (omp_set_num_threads) | |
651 | ialias (omp_get_dynamic) | |
652 | ialias (omp_get_nested) | |
a68ab351 JJ |
653 | ialias (omp_set_schedule) |
654 | ialias (omp_get_schedule) | |
655 | ialias (omp_get_max_threads) | |
656 | ialias (omp_get_thread_limit) | |
657 | ialias (omp_set_max_active_levels) | |
658 | ialias (omp_get_max_active_levels) |