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a68ab351 | 1 | /* Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
953ff289 DN |
2 | Contributed by Richard Henderson <rth@redhat.com>. |
3 | ||
4 | This file is part of the GNU OpenMP Library (libgomp). | |
5 | ||
6 | Libgomp is free software; you can redistribute it and/or modify it | |
7 | under the terms of the GNU Lesser General Public License as published by | |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS | |
13 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for | |
14 | more details. | |
15 | ||
a68ab351 | 16 | You should have received a copy of the GNU Lesser General Public License |
953ff289 DN |
17 | along with libgomp; see the file COPYING.LIB. If not, write to the |
18 | Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, | |
19 | MA 02110-1301, USA. */ | |
20 | ||
21 | /* As a special exception, if you link this library with other files, some | |
22 | of which are compiled with GCC, to produce an executable, this library | |
23 | does not by itself cause the resulting executable to be covered by the | |
24 | GNU General Public License. This exception does not however invalidate | |
25 | any other reasons why the executable file might be covered by the GNU | |
26 | General Public License. */ | |
27 | ||
28 | /* This file defines the OpenMP internal control variables, and arranges | |
29 | for them to be initialized from environment variables at startup. */ | |
30 | ||
31 | #include "libgomp.h" | |
32 | #include "libgomp_f.h" | |
89b3e3cd | 33 | #include <ctype.h> |
953ff289 | 34 | #include <stdlib.h> |
a1b25e49 PG |
35 | #ifdef STRING_WITH_STRINGS |
36 | # include <string.h> | |
37 | # include <strings.h> | |
38 | #else | |
39 | # ifdef HAVE_STRING_H | |
40 | # include <string.h> | |
41 | # else | |
42 | # ifdef HAVE_STRINGS_H | |
43 | # include <strings.h> | |
44 | # endif | |
45 | # endif | |
46 | #endif | |
d0d1b24d RH |
47 | #include <limits.h> |
48 | #include <errno.h> | |
953ff289 | 49 | |
976e44e3 JJ |
50 | #ifndef HAVE_STRTOULL |
51 | # define strtoull(ptr, eptr, base) strtoul (ptr, eptr, base) | |
52 | #endif | |
953ff289 | 53 | |
a68ab351 JJ |
54 | struct gomp_task_icv gomp_global_icv = { |
55 | .nthreads_var = 1, | |
56 | .run_sched_var = GFS_DYNAMIC, | |
57 | .run_sched_modifier = 1, | |
58 | .dyn_var = false, | |
59 | .nest_var = false | |
60 | }; | |
61 | ||
a0884cf0 JJ |
62 | unsigned short *gomp_cpu_affinity; |
63 | size_t gomp_cpu_affinity_len; | |
a68ab351 JJ |
64 | unsigned long gomp_max_active_levels_var = INT_MAX; |
65 | unsigned long gomp_thread_limit_var = ULONG_MAX; | |
66 | unsigned long gomp_remaining_threads_count; | |
67 | #ifndef HAVE_SYNC_BUILTINS | |
68 | gomp_mutex_t gomp_remaining_threads_lock; | |
69 | #endif | |
70 | unsigned long gomp_available_cpus = 1, gomp_managed_threads = 1; | |
71 | unsigned long long gomp_spin_count_var, gomp_throttled_spin_count_var; | |
953ff289 DN |
72 | |
73 | /* Parse the OMP_SCHEDULE environment variable. */ | |
74 | ||
75 | static void | |
76 | parse_schedule (void) | |
77 | { | |
78 | char *env, *end; | |
6acf0b38 | 79 | unsigned long value; |
953ff289 DN |
80 | |
81 | env = getenv ("OMP_SCHEDULE"); | |
82 | if (env == NULL) | |
83 | return; | |
84 | ||
89b3e3cd JJ |
85 | while (isspace ((unsigned char) *env)) |
86 | ++env; | |
87 | if (strncasecmp (env, "static", 6) == 0) | |
953ff289 | 88 | { |
a68ab351 | 89 | gomp_global_icv.run_sched_var = GFS_STATIC; |
953ff289 DN |
90 | env += 6; |
91 | } | |
89b3e3cd | 92 | else if (strncasecmp (env, "dynamic", 7) == 0) |
953ff289 | 93 | { |
a68ab351 | 94 | gomp_global_icv.run_sched_var = GFS_DYNAMIC; |
953ff289 DN |
95 | env += 7; |
96 | } | |
89b3e3cd | 97 | else if (strncasecmp (env, "guided", 6) == 0) |
953ff289 | 98 | { |
a68ab351 | 99 | gomp_global_icv.run_sched_var = GFS_GUIDED; |
953ff289 DN |
100 | env += 6; |
101 | } | |
a68ab351 JJ |
102 | else if (strncasecmp (env, "auto", 4) == 0) |
103 | { | |
104 | gomp_global_icv.run_sched_var = GFS_AUTO; | |
105 | env += 4; | |
106 | } | |
953ff289 DN |
107 | else |
108 | goto unknown; | |
109 | ||
89b3e3cd JJ |
110 | while (isspace ((unsigned char) *env)) |
111 | ++env; | |
953ff289 DN |
112 | if (*env == '\0') |
113 | return; | |
89b3e3cd | 114 | if (*env++ != ',') |
953ff289 | 115 | goto unknown; |
89b3e3cd JJ |
116 | while (isspace ((unsigned char) *env)) |
117 | ++env; | |
953ff289 | 118 | if (*env == '\0') |
953ff289 DN |
119 | goto invalid; |
120 | ||
6acf0b38 UB |
121 | errno = 0; |
122 | value = strtoul (env, &end, 10); | |
123 | if (errno) | |
124 | goto invalid; | |
125 | ||
89b3e3cd JJ |
126 | while (isspace ((unsigned char) *end)) |
127 | ++end; | |
953ff289 DN |
128 | if (*end != '\0') |
129 | goto invalid; | |
6acf0b38 | 130 | |
a68ab351 JJ |
131 | if ((int)value != value) |
132 | goto invalid; | |
133 | ||
134 | gomp_global_icv.run_sched_modifier = value; | |
953ff289 DN |
135 | return; |
136 | ||
137 | unknown: | |
138 | gomp_error ("Unknown value for environment variable OMP_SCHEDULE"); | |
139 | return; | |
140 | ||
141 | invalid: | |
142 | gomp_error ("Invalid value for chunk size in " | |
143 | "environment variable OMP_SCHEDULE"); | |
953ff289 DN |
144 | return; |
145 | } | |
146 | ||
a68ab351 | 147 | /* Parse an unsigned long environment variable. Return true if one was |
953ff289 DN |
148 | present and it was successfully parsed. */ |
149 | ||
150 | static bool | |
d0d1b24d | 151 | parse_unsigned_long (const char *name, unsigned long *pvalue) |
953ff289 DN |
152 | { |
153 | char *env, *end; | |
d0d1b24d | 154 | unsigned long value; |
953ff289 | 155 | |
d0d1b24d | 156 | env = getenv (name); |
953ff289 DN |
157 | if (env == NULL) |
158 | return false; | |
159 | ||
89b3e3cd JJ |
160 | while (isspace ((unsigned char) *env)) |
161 | ++env; | |
953ff289 DN |
162 | if (*env == '\0') |
163 | goto invalid; | |
164 | ||
6acf0b38 | 165 | errno = 0; |
d0d1b24d | 166 | value = strtoul (env, &end, 10); |
6acf0b38 UB |
167 | if (errno || (long) value <= 0) |
168 | goto invalid; | |
169 | ||
89b3e3cd JJ |
170 | while (isspace ((unsigned char) *end)) |
171 | ++end; | |
953ff289 DN |
172 | if (*end != '\0') |
173 | goto invalid; | |
d0d1b24d RH |
174 | |
175 | *pvalue = value; | |
953ff289 DN |
176 | return true; |
177 | ||
178 | invalid: | |
d0d1b24d | 179 | gomp_error ("Invalid value for environment variable %s", name); |
953ff289 DN |
180 | return false; |
181 | } | |
182 | ||
a68ab351 JJ |
183 | /* Parse the OMP_STACKSIZE environment varible. Return true if one was |
184 | present and it was successfully parsed. */ | |
185 | ||
186 | static bool | |
187 | parse_stacksize (const char *name, unsigned long *pvalue) | |
188 | { | |
189 | char *env, *end; | |
190 | unsigned long value, shift = 10; | |
191 | ||
192 | env = getenv (name); | |
193 | if (env == NULL) | |
194 | return false; | |
195 | ||
196 | while (isspace ((unsigned char) *env)) | |
197 | ++env; | |
198 | if (*env == '\0') | |
199 | goto invalid; | |
200 | ||
201 | errno = 0; | |
202 | value = strtoul (env, &end, 10); | |
203 | if (errno) | |
204 | goto invalid; | |
205 | ||
206 | while (isspace ((unsigned char) *end)) | |
207 | ++end; | |
208 | if (*end != '\0') | |
209 | { | |
323ff903 | 210 | switch (tolower ((unsigned char) *end)) |
a68ab351 JJ |
211 | { |
212 | case 'b': | |
213 | shift = 0; | |
214 | break; | |
215 | case 'k': | |
216 | break; | |
217 | case 'm': | |
218 | shift = 20; | |
219 | break; | |
220 | case 'g': | |
221 | shift = 30; | |
222 | break; | |
223 | default: | |
224 | goto invalid; | |
225 | } | |
226 | ++end; | |
227 | while (isspace ((unsigned char) *end)) | |
228 | ++end; | |
229 | if (*end != '\0') | |
230 | goto invalid; | |
231 | } | |
232 | ||
233 | if (((value << shift) >> shift) != value) | |
234 | goto invalid; | |
235 | ||
236 | *pvalue = value << shift; | |
237 | return true; | |
238 | ||
239 | invalid: | |
240 | gomp_error ("Invalid value for environment variable %s", name); | |
241 | return false; | |
242 | } | |
243 | ||
244 | /* Parse the GOMP_SPINCOUNT environment varible. Return true if one was | |
245 | present and it was successfully parsed. */ | |
246 | ||
247 | static bool | |
248 | parse_spincount (const char *name, unsigned long long *pvalue) | |
249 | { | |
250 | char *env, *end; | |
251 | unsigned long long value, mult = 1; | |
252 | ||
253 | env = getenv (name); | |
254 | if (env == NULL) | |
255 | return false; | |
256 | ||
257 | while (isspace ((unsigned char) *env)) | |
258 | ++env; | |
259 | if (*env == '\0') | |
260 | goto invalid; | |
261 | ||
262 | if (strncasecmp (env, "infinite", 8) == 0 | |
263 | || strncasecmp (env, "infinity", 8) == 0) | |
264 | { | |
265 | value = ~0ULL; | |
266 | end = env + 8; | |
267 | goto check_tail; | |
268 | } | |
269 | ||
270 | errno = 0; | |
271 | value = strtoull (env, &end, 10); | |
272 | if (errno) | |
273 | goto invalid; | |
274 | ||
275 | while (isspace ((unsigned char) *end)) | |
276 | ++end; | |
277 | if (*end != '\0') | |
278 | { | |
323ff903 | 279 | switch (tolower ((unsigned char) *end)) |
a68ab351 JJ |
280 | { |
281 | case 'k': | |
282 | mult = 1000LL; | |
283 | break; | |
284 | case 'm': | |
285 | mult = 1000LL * 1000LL; | |
286 | break; | |
287 | case 'g': | |
288 | mult = 1000LL * 1000LL * 1000LL; | |
289 | break; | |
290 | case 't': | |
291 | mult = 1000LL * 1000LL * 1000LL * 1000LL; | |
292 | break; | |
293 | default: | |
294 | goto invalid; | |
295 | } | |
296 | ++end; | |
297 | check_tail: | |
298 | while (isspace ((unsigned char) *end)) | |
299 | ++end; | |
300 | if (*end != '\0') | |
301 | goto invalid; | |
302 | } | |
303 | ||
304 | if (value > ~0ULL / mult) | |
305 | value = ~0ULL; | |
306 | else | |
307 | value *= mult; | |
308 | ||
309 | *pvalue = value; | |
310 | return true; | |
311 | ||
312 | invalid: | |
313 | gomp_error ("Invalid value for environment variable %s", name); | |
314 | return false; | |
315 | } | |
316 | ||
317 | /* Parse a boolean value for environment variable NAME and store the | |
953ff289 DN |
318 | result in VALUE. */ |
319 | ||
320 | static void | |
321 | parse_boolean (const char *name, bool *value) | |
322 | { | |
323 | const char *env; | |
324 | ||
325 | env = getenv (name); | |
326 | if (env == NULL) | |
327 | return; | |
328 | ||
89b3e3cd JJ |
329 | while (isspace ((unsigned char) *env)) |
330 | ++env; | |
331 | if (strncasecmp (env, "true", 4) == 0) | |
332 | { | |
333 | *value = true; | |
334 | env += 4; | |
335 | } | |
336 | else if (strncasecmp (env, "false", 5) == 0) | |
337 | { | |
338 | *value = false; | |
339 | env += 5; | |
340 | } | |
953ff289 | 341 | else |
89b3e3cd JJ |
342 | env = "X"; |
343 | while (isspace ((unsigned char) *env)) | |
344 | ++env; | |
345 | if (*env != '\0') | |
d0d1b24d | 346 | gomp_error ("Invalid value for environment variable %s", name); |
953ff289 DN |
347 | } |
348 | ||
a68ab351 JJ |
349 | /* Parse the OMP_WAIT_POLICY environment variable and store the |
350 | result in gomp_active_wait_policy. */ | |
351 | ||
352 | static int | |
353 | parse_wait_policy (void) | |
354 | { | |
355 | const char *env; | |
356 | int ret = -1; | |
357 | ||
358 | env = getenv ("OMP_WAIT_POLICY"); | |
359 | if (env == NULL) | |
360 | return -1; | |
361 | ||
362 | while (isspace ((unsigned char) *env)) | |
363 | ++env; | |
364 | if (strncasecmp (env, "active", 6) == 0) | |
365 | { | |
366 | ret = 1; | |
367 | env += 6; | |
368 | } | |
369 | else if (strncasecmp (env, "passive", 7) == 0) | |
370 | { | |
371 | ret = 0; | |
372 | env += 7; | |
373 | } | |
374 | else | |
375 | env = "X"; | |
376 | while (isspace ((unsigned char) *env)) | |
377 | ++env; | |
378 | if (*env == '\0') | |
379 | return ret; | |
380 | gomp_error ("Invalid value for environment variable OMP_WAIT_POLICY"); | |
381 | return -1; | |
382 | } | |
383 | ||
a0884cf0 JJ |
384 | /* Parse the GOMP_CPU_AFFINITY environment varible. Return true if one was |
385 | present and it was successfully parsed. */ | |
386 | ||
387 | static bool | |
388 | parse_affinity (void) | |
389 | { | |
390 | char *env, *end; | |
391 | unsigned long cpu_beg, cpu_end, cpu_stride; | |
392 | unsigned short *cpus = NULL; | |
393 | size_t allocated = 0, used = 0, needed; | |
394 | ||
395 | env = getenv ("GOMP_CPU_AFFINITY"); | |
396 | if (env == NULL) | |
397 | return false; | |
398 | ||
399 | do | |
400 | { | |
401 | while (*env == ' ' || *env == '\t') | |
402 | env++; | |
403 | ||
404 | cpu_beg = strtoul (env, &end, 0); | |
405 | cpu_end = cpu_beg; | |
406 | cpu_stride = 1; | |
407 | if (env == end || cpu_beg >= 65536) | |
408 | goto invalid; | |
409 | ||
410 | env = end; | |
411 | if (*env == '-') | |
412 | { | |
413 | cpu_end = strtoul (++env, &end, 0); | |
414 | if (env == end || cpu_end >= 65536 || cpu_end < cpu_beg) | |
415 | goto invalid; | |
416 | ||
417 | env = end; | |
418 | if (*env == ':') | |
419 | { | |
420 | cpu_stride = strtoul (++env, &end, 0); | |
421 | if (env == end || cpu_stride == 0 || cpu_stride >= 65536) | |
422 | goto invalid; | |
423 | ||
424 | env = end; | |
425 | } | |
426 | } | |
427 | ||
428 | needed = (cpu_end - cpu_beg) / cpu_stride + 1; | |
429 | if (used + needed >= allocated) | |
430 | { | |
431 | unsigned short *new_cpus; | |
432 | ||
433 | if (allocated < 64) | |
434 | allocated = 64; | |
435 | if (allocated > needed) | |
436 | allocated <<= 1; | |
437 | else | |
438 | allocated += 2 * needed; | |
439 | new_cpus = realloc (cpus, allocated * sizeof (unsigned short)); | |
440 | if (new_cpus == NULL) | |
441 | { | |
442 | free (cpus); | |
443 | gomp_error ("not enough memory to store GOMP_CPU_AFFINITY list"); | |
444 | return false; | |
445 | } | |
446 | ||
447 | cpus = new_cpus; | |
448 | } | |
449 | ||
450 | while (needed--) | |
451 | { | |
452 | cpus[used++] = cpu_beg; | |
453 | cpu_beg += cpu_stride; | |
454 | } | |
455 | ||
456 | while (*env == ' ' || *env == '\t') | |
457 | env++; | |
458 | ||
459 | if (*env == ',') | |
460 | env++; | |
461 | else if (*env == '\0') | |
462 | break; | |
463 | } | |
464 | while (1); | |
465 | ||
466 | gomp_cpu_affinity = cpus; | |
467 | gomp_cpu_affinity_len = used; | |
468 | return true; | |
469 | ||
470 | invalid: | |
471 | gomp_error ("Invalid value for enviroment variable GOMP_CPU_AFFINITY"); | |
472 | return false; | |
473 | } | |
474 | ||
953ff289 DN |
475 | static void __attribute__((constructor)) |
476 | initialize_env (void) | |
477 | { | |
d0d1b24d | 478 | unsigned long stacksize; |
a68ab351 | 479 | int wait_policy; |
d0d1b24d | 480 | |
953ff289 DN |
481 | /* Do a compile time check that mkomp_h.pl did good job. */ |
482 | omp_check_defines (); | |
483 | ||
484 | parse_schedule (); | |
a68ab351 JJ |
485 | parse_boolean ("OMP_DYNAMIC", &gomp_global_icv.dyn_var); |
486 | parse_boolean ("OMP_NESTED", &gomp_global_icv.nest_var); | |
487 | parse_unsigned_long ("OMP_MAX_ACTIVE_LEVELS", &gomp_max_active_levels_var); | |
488 | parse_unsigned_long ("OMP_THREAD_LIMIT", &gomp_thread_limit_var); | |
489 | if (gomp_thread_limit_var != ULONG_MAX) | |
9c4e59e0 | 490 | gomp_remaining_threads_count = gomp_thread_limit_var - 1; |
a68ab351 | 491 | #ifndef HAVE_SYNC_BUILTINS |
9c4e59e0 | 492 | gomp_mutex_init (&gomp_remaining_threads_lock); |
a68ab351 | 493 | #endif |
a68ab351 JJ |
494 | gomp_init_num_threads (); |
495 | gomp_available_cpus = gomp_global_icv.nthreads_var; | |
496 | if (!parse_unsigned_long ("OMP_NUM_THREADS", &gomp_global_icv.nthreads_var)) | |
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, | |
505 | 200 msec blocking when OMP_WAIT_POLICY is not specificed | |
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) | |
512 | gomp_spin_count_var = 20000000LL; | |
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 | { | |
638 | if (max_levels > 0) | |
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) |