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fb79f500 | 1 | /* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
80f046cc | 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 | 110 | if (*env == '\0') |
fb79f500 JJ |
111 | { |
112 | gomp_global_icv.run_sched_modifier | |
113 | = gomp_global_icv.run_sched_var != GFS_STATIC; | |
114 | return; | |
115 | } | |
89b3e3cd | 116 | if (*env++ != ',') |
953ff289 | 117 | goto unknown; |
89b3e3cd JJ |
118 | while (isspace ((unsigned char) *env)) |
119 | ++env; | |
953ff289 | 120 | if (*env == '\0') |
953ff289 DN |
121 | goto invalid; |
122 | ||
6acf0b38 UB |
123 | errno = 0; |
124 | value = strtoul (env, &end, 10); | |
125 | if (errno) | |
126 | goto invalid; | |
127 | ||
89b3e3cd JJ |
128 | while (isspace ((unsigned char) *end)) |
129 | ++end; | |
953ff289 DN |
130 | if (*end != '\0') |
131 | goto invalid; | |
6acf0b38 | 132 | |
a68ab351 JJ |
133 | if ((int)value != value) |
134 | goto invalid; | |
135 | ||
fb79f500 JJ |
136 | if (value == 0 && gomp_global_icv.run_sched_var != GFS_STATIC) |
137 | value = 1; | |
a68ab351 | 138 | gomp_global_icv.run_sched_modifier = value; |
953ff289 DN |
139 | return; |
140 | ||
141 | unknown: | |
142 | gomp_error ("Unknown value for environment variable OMP_SCHEDULE"); | |
143 | return; | |
144 | ||
145 | invalid: | |
146 | gomp_error ("Invalid value for chunk size in " | |
147 | "environment variable OMP_SCHEDULE"); | |
953ff289 DN |
148 | return; |
149 | } | |
150 | ||
a68ab351 | 151 | /* Parse an unsigned long environment variable. Return true if one was |
953ff289 DN |
152 | present and it was successfully parsed. */ |
153 | ||
154 | static bool | |
80f046cc | 155 | parse_unsigned_long (const char *name, unsigned long *pvalue, bool allow_zero) |
953ff289 DN |
156 | { |
157 | char *env, *end; | |
d0d1b24d | 158 | unsigned long value; |
953ff289 | 159 | |
d0d1b24d | 160 | env = getenv (name); |
953ff289 DN |
161 | if (env == NULL) |
162 | return false; | |
163 | ||
89b3e3cd JJ |
164 | while (isspace ((unsigned char) *env)) |
165 | ++env; | |
953ff289 DN |
166 | if (*env == '\0') |
167 | goto invalid; | |
168 | ||
6acf0b38 | 169 | errno = 0; |
d0d1b24d | 170 | value = strtoul (env, &end, 10); |
80f046cc | 171 | if (errno || (long) value <= 0 - allow_zero) |
6acf0b38 UB |
172 | goto invalid; |
173 | ||
89b3e3cd JJ |
174 | while (isspace ((unsigned char) *end)) |
175 | ++end; | |
953ff289 DN |
176 | if (*end != '\0') |
177 | goto invalid; | |
d0d1b24d RH |
178 | |
179 | *pvalue = value; | |
953ff289 DN |
180 | return true; |
181 | ||
182 | invalid: | |
d0d1b24d | 183 | gomp_error ("Invalid value for environment variable %s", name); |
953ff289 DN |
184 | return false; |
185 | } | |
186 | ||
a68ab351 JJ |
187 | /* Parse the OMP_STACKSIZE environment varible. Return true if one was |
188 | present and it was successfully parsed. */ | |
189 | ||
190 | static bool | |
191 | parse_stacksize (const char *name, unsigned long *pvalue) | |
192 | { | |
193 | char *env, *end; | |
194 | unsigned long value, shift = 10; | |
195 | ||
196 | env = getenv (name); | |
197 | if (env == NULL) | |
198 | return false; | |
199 | ||
200 | while (isspace ((unsigned char) *env)) | |
201 | ++env; | |
202 | if (*env == '\0') | |
203 | goto invalid; | |
204 | ||
205 | errno = 0; | |
206 | value = strtoul (env, &end, 10); | |
207 | if (errno) | |
208 | goto invalid; | |
209 | ||
210 | while (isspace ((unsigned char) *end)) | |
211 | ++end; | |
212 | if (*end != '\0') | |
213 | { | |
323ff903 | 214 | switch (tolower ((unsigned char) *end)) |
a68ab351 JJ |
215 | { |
216 | case 'b': | |
217 | shift = 0; | |
218 | break; | |
219 | case 'k': | |
220 | break; | |
221 | case 'm': | |
222 | shift = 20; | |
223 | break; | |
224 | case 'g': | |
225 | shift = 30; | |
226 | break; | |
227 | default: | |
228 | goto invalid; | |
229 | } | |
230 | ++end; | |
231 | while (isspace ((unsigned char) *end)) | |
232 | ++end; | |
233 | if (*end != '\0') | |
234 | goto invalid; | |
235 | } | |
236 | ||
237 | if (((value << shift) >> shift) != value) | |
238 | goto invalid; | |
239 | ||
240 | *pvalue = value << shift; | |
241 | return true; | |
242 | ||
243 | invalid: | |
244 | gomp_error ("Invalid value for environment variable %s", name); | |
245 | return false; | |
246 | } | |
247 | ||
248 | /* Parse the GOMP_SPINCOUNT environment varible. Return true if one was | |
249 | present and it was successfully parsed. */ | |
250 | ||
251 | static bool | |
252 | parse_spincount (const char *name, unsigned long long *pvalue) | |
253 | { | |
254 | char *env, *end; | |
255 | unsigned long long value, mult = 1; | |
256 | ||
257 | env = getenv (name); | |
258 | if (env == NULL) | |
259 | return false; | |
260 | ||
261 | while (isspace ((unsigned char) *env)) | |
262 | ++env; | |
263 | if (*env == '\0') | |
264 | goto invalid; | |
265 | ||
266 | if (strncasecmp (env, "infinite", 8) == 0 | |
267 | || strncasecmp (env, "infinity", 8) == 0) | |
268 | { | |
269 | value = ~0ULL; | |
270 | end = env + 8; | |
271 | goto check_tail; | |
272 | } | |
273 | ||
274 | errno = 0; | |
275 | value = strtoull (env, &end, 10); | |
276 | if (errno) | |
277 | goto invalid; | |
278 | ||
279 | while (isspace ((unsigned char) *end)) | |
280 | ++end; | |
281 | if (*end != '\0') | |
282 | { | |
323ff903 | 283 | switch (tolower ((unsigned char) *end)) |
a68ab351 JJ |
284 | { |
285 | case 'k': | |
286 | mult = 1000LL; | |
287 | break; | |
288 | case 'm': | |
289 | mult = 1000LL * 1000LL; | |
290 | break; | |
291 | case 'g': | |
292 | mult = 1000LL * 1000LL * 1000LL; | |
293 | break; | |
294 | case 't': | |
295 | mult = 1000LL * 1000LL * 1000LL * 1000LL; | |
296 | break; | |
297 | default: | |
298 | goto invalid; | |
299 | } | |
300 | ++end; | |
301 | check_tail: | |
302 | while (isspace ((unsigned char) *end)) | |
303 | ++end; | |
304 | if (*end != '\0') | |
305 | goto invalid; | |
306 | } | |
307 | ||
308 | if (value > ~0ULL / mult) | |
309 | value = ~0ULL; | |
310 | else | |
311 | value *= mult; | |
312 | ||
313 | *pvalue = value; | |
314 | return true; | |
315 | ||
316 | invalid: | |
317 | gomp_error ("Invalid value for environment variable %s", name); | |
318 | return false; | |
319 | } | |
320 | ||
321 | /* Parse a boolean value for environment variable NAME and store the | |
953ff289 DN |
322 | result in VALUE. */ |
323 | ||
324 | static void | |
325 | parse_boolean (const char *name, bool *value) | |
326 | { | |
327 | const char *env; | |
328 | ||
329 | env = getenv (name); | |
330 | if (env == NULL) | |
331 | return; | |
332 | ||
89b3e3cd JJ |
333 | while (isspace ((unsigned char) *env)) |
334 | ++env; | |
335 | if (strncasecmp (env, "true", 4) == 0) | |
336 | { | |
337 | *value = true; | |
338 | env += 4; | |
339 | } | |
340 | else if (strncasecmp (env, "false", 5) == 0) | |
341 | { | |
342 | *value = false; | |
343 | env += 5; | |
344 | } | |
953ff289 | 345 | else |
89b3e3cd JJ |
346 | env = "X"; |
347 | while (isspace ((unsigned char) *env)) | |
348 | ++env; | |
349 | if (*env != '\0') | |
d0d1b24d | 350 | gomp_error ("Invalid value for environment variable %s", name); |
953ff289 DN |
351 | } |
352 | ||
a68ab351 JJ |
353 | /* Parse the OMP_WAIT_POLICY environment variable and store the |
354 | result in gomp_active_wait_policy. */ | |
355 | ||
356 | static int | |
357 | parse_wait_policy (void) | |
358 | { | |
359 | const char *env; | |
360 | int ret = -1; | |
361 | ||
362 | env = getenv ("OMP_WAIT_POLICY"); | |
363 | if (env == NULL) | |
364 | return -1; | |
365 | ||
366 | while (isspace ((unsigned char) *env)) | |
367 | ++env; | |
368 | if (strncasecmp (env, "active", 6) == 0) | |
369 | { | |
370 | ret = 1; | |
371 | env += 6; | |
372 | } | |
373 | else if (strncasecmp (env, "passive", 7) == 0) | |
374 | { | |
375 | ret = 0; | |
376 | env += 7; | |
377 | } | |
378 | else | |
379 | env = "X"; | |
380 | while (isspace ((unsigned char) *env)) | |
381 | ++env; | |
382 | if (*env == '\0') | |
383 | return ret; | |
384 | gomp_error ("Invalid value for environment variable OMP_WAIT_POLICY"); | |
385 | return -1; | |
386 | } | |
387 | ||
a0884cf0 JJ |
388 | /* Parse the GOMP_CPU_AFFINITY environment varible. Return true if one was |
389 | present and it was successfully parsed. */ | |
390 | ||
391 | static bool | |
392 | parse_affinity (void) | |
393 | { | |
394 | char *env, *end; | |
395 | unsigned long cpu_beg, cpu_end, cpu_stride; | |
396 | unsigned short *cpus = NULL; | |
397 | size_t allocated = 0, used = 0, needed; | |
398 | ||
399 | env = getenv ("GOMP_CPU_AFFINITY"); | |
400 | if (env == NULL) | |
401 | return false; | |
402 | ||
403 | do | |
404 | { | |
405 | while (*env == ' ' || *env == '\t') | |
406 | env++; | |
407 | ||
408 | cpu_beg = strtoul (env, &end, 0); | |
409 | cpu_end = cpu_beg; | |
410 | cpu_stride = 1; | |
411 | if (env == end || cpu_beg >= 65536) | |
412 | goto invalid; | |
413 | ||
414 | env = end; | |
415 | if (*env == '-') | |
416 | { | |
417 | cpu_end = strtoul (++env, &end, 0); | |
418 | if (env == end || cpu_end >= 65536 || cpu_end < cpu_beg) | |
419 | goto invalid; | |
420 | ||
421 | env = end; | |
422 | if (*env == ':') | |
423 | { | |
424 | cpu_stride = strtoul (++env, &end, 0); | |
425 | if (env == end || cpu_stride == 0 || cpu_stride >= 65536) | |
426 | goto invalid; | |
427 | ||
428 | env = end; | |
429 | } | |
430 | } | |
431 | ||
432 | needed = (cpu_end - cpu_beg) / cpu_stride + 1; | |
433 | if (used + needed >= allocated) | |
434 | { | |
435 | unsigned short *new_cpus; | |
436 | ||
437 | if (allocated < 64) | |
438 | allocated = 64; | |
439 | if (allocated > needed) | |
440 | allocated <<= 1; | |
441 | else | |
442 | allocated += 2 * needed; | |
443 | new_cpus = realloc (cpus, allocated * sizeof (unsigned short)); | |
444 | if (new_cpus == NULL) | |
445 | { | |
446 | free (cpus); | |
447 | gomp_error ("not enough memory to store GOMP_CPU_AFFINITY list"); | |
448 | return false; | |
449 | } | |
450 | ||
451 | cpus = new_cpus; | |
452 | } | |
453 | ||
454 | while (needed--) | |
455 | { | |
456 | cpus[used++] = cpu_beg; | |
457 | cpu_beg += cpu_stride; | |
458 | } | |
459 | ||
460 | while (*env == ' ' || *env == '\t') | |
461 | env++; | |
462 | ||
463 | if (*env == ',') | |
464 | env++; | |
465 | else if (*env == '\0') | |
466 | break; | |
467 | } | |
468 | while (1); | |
469 | ||
470 | gomp_cpu_affinity = cpus; | |
471 | gomp_cpu_affinity_len = used; | |
472 | return true; | |
473 | ||
474 | invalid: | |
475 | gomp_error ("Invalid value for enviroment variable GOMP_CPU_AFFINITY"); | |
476 | return false; | |
477 | } | |
478 | ||
953ff289 DN |
479 | static void __attribute__((constructor)) |
480 | initialize_env (void) | |
481 | { | |
d0d1b24d | 482 | unsigned long stacksize; |
a68ab351 | 483 | int wait_policy; |
d0d1b24d | 484 | |
953ff289 DN |
485 | /* Do a compile time check that mkomp_h.pl did good job. */ |
486 | omp_check_defines (); | |
487 | ||
488 | parse_schedule (); | |
a68ab351 JJ |
489 | parse_boolean ("OMP_DYNAMIC", &gomp_global_icv.dyn_var); |
490 | parse_boolean ("OMP_NESTED", &gomp_global_icv.nest_var); | |
80f046cc JJ |
491 | parse_unsigned_long ("OMP_MAX_ACTIVE_LEVELS", &gomp_max_active_levels_var, |
492 | true); | |
493 | parse_unsigned_long ("OMP_THREAD_LIMIT", &gomp_thread_limit_var, false); | |
a68ab351 | 494 | if (gomp_thread_limit_var != ULONG_MAX) |
9c4e59e0 | 495 | gomp_remaining_threads_count = gomp_thread_limit_var - 1; |
a68ab351 | 496 | #ifndef HAVE_SYNC_BUILTINS |
9c4e59e0 | 497 | gomp_mutex_init (&gomp_remaining_threads_lock); |
a68ab351 | 498 | #endif |
a68ab351 JJ |
499 | gomp_init_num_threads (); |
500 | gomp_available_cpus = gomp_global_icv.nthreads_var; | |
80f046cc JJ |
501 | if (!parse_unsigned_long ("OMP_NUM_THREADS", &gomp_global_icv.nthreads_var, |
502 | false)) | |
a68ab351 | 503 | gomp_global_icv.nthreads_var = gomp_available_cpus; |
a0884cf0 JJ |
504 | if (parse_affinity ()) |
505 | gomp_init_affinity (); | |
a68ab351 JJ |
506 | wait_policy = parse_wait_policy (); |
507 | if (!parse_spincount ("GOMP_SPINCOUNT", &gomp_spin_count_var)) | |
508 | { | |
509 | /* Using a rough estimation of 100000 spins per msec, | |
510 | use 5 min blocking for OMP_WAIT_POLICY=active, | |
4c698cf8 | 511 | 3 msec blocking when OMP_WAIT_POLICY is not specificed |
a68ab351 JJ |
512 | and 0 when OMP_WAIT_POLICY=passive. |
513 | Depending on the CPU speed, this can be e.g. 5 times longer | |
514 | or 5 times shorter. */ | |
515 | if (wait_policy > 0) | |
516 | gomp_spin_count_var = 30000000000LL; | |
517 | else if (wait_policy < 0) | |
4c698cf8 | 518 | gomp_spin_count_var = 300000LL; |
a68ab351 JJ |
519 | } |
520 | /* gomp_throttled_spin_count_var is used when there are more libgomp | |
521 | managed threads than available CPUs. Use very short spinning. */ | |
522 | if (wait_policy > 0) | |
523 | gomp_throttled_spin_count_var = 1000LL; | |
524 | else if (wait_policy < 0) | |
525 | gomp_throttled_spin_count_var = 100LL; | |
526 | if (gomp_throttled_spin_count_var > gomp_spin_count_var) | |
527 | gomp_throttled_spin_count_var = gomp_spin_count_var; | |
d0d1b24d RH |
528 | |
529 | /* Not strictly environment related, but ordering constructors is tricky. */ | |
530 | pthread_attr_init (&gomp_thread_attr); | |
531 | pthread_attr_setdetachstate (&gomp_thread_attr, PTHREAD_CREATE_DETACHED); | |
532 | ||
a68ab351 JJ |
533 | if (parse_stacksize ("OMP_STACKSIZE", &stacksize) |
534 | || parse_stacksize ("GOMP_STACKSIZE", &stacksize)) | |
d0d1b24d | 535 | { |
c3b11a40 RH |
536 | int err; |
537 | ||
c3b11a40 RH |
538 | err = pthread_attr_setstacksize (&gomp_thread_attr, stacksize); |
539 | ||
540 | #ifdef PTHREAD_STACK_MIN | |
541 | if (err == EINVAL) | |
d0d1b24d | 542 | { |
c3b11a40 RH |
543 | if (stacksize < PTHREAD_STACK_MIN) |
544 | gomp_error ("Stack size less than minimum of %luk", | |
545 | PTHREAD_STACK_MIN / 1024ul | |
546 | + (PTHREAD_STACK_MIN % 1024 != 0)); | |
547 | else | |
d0d1b24d | 548 | gomp_error ("Stack size larger than system limit"); |
d0d1b24d | 549 | } |
c3b11a40 RH |
550 | else |
551 | #endif | |
552 | if (err != 0) | |
553 | gomp_error ("Stack size change failed: %s", strerror (err)); | |
d0d1b24d | 554 | } |
953ff289 DN |
555 | } |
556 | ||
557 | \f | |
558 | /* The public OpenMP API routines that access these variables. */ | |
559 | ||
560 | void | |
561 | omp_set_num_threads (int n) | |
562 | { | |
a68ab351 JJ |
563 | struct gomp_task_icv *icv = gomp_icv (true); |
564 | icv->nthreads_var = (n > 0 ? n : 1); | |
953ff289 DN |
565 | } |
566 | ||
567 | void | |
568 | omp_set_dynamic (int val) | |
569 | { | |
a68ab351 JJ |
570 | struct gomp_task_icv *icv = gomp_icv (true); |
571 | icv->dyn_var = val; | |
953ff289 DN |
572 | } |
573 | ||
574 | int | |
575 | omp_get_dynamic (void) | |
576 | { | |
a68ab351 JJ |
577 | struct gomp_task_icv *icv = gomp_icv (false); |
578 | return icv->dyn_var; | |
953ff289 DN |
579 | } |
580 | ||
581 | void | |
582 | omp_set_nested (int val) | |
583 | { | |
a68ab351 JJ |
584 | struct gomp_task_icv *icv = gomp_icv (true); |
585 | icv->nest_var = val; | |
953ff289 DN |
586 | } |
587 | ||
588 | int | |
589 | omp_get_nested (void) | |
590 | { | |
a68ab351 JJ |
591 | struct gomp_task_icv *icv = gomp_icv (false); |
592 | return icv->nest_var; | |
593 | } | |
594 | ||
595 | void | |
596 | omp_set_schedule (omp_sched_t kind, int modifier) | |
597 | { | |
598 | struct gomp_task_icv *icv = gomp_icv (true); | |
599 | switch (kind) | |
600 | { | |
601 | case omp_sched_static: | |
602 | if (modifier < 1) | |
603 | modifier = 0; | |
604 | icv->run_sched_modifier = modifier; | |
605 | break; | |
606 | case omp_sched_dynamic: | |
607 | case omp_sched_guided: | |
608 | if (modifier < 1) | |
609 | modifier = 1; | |
610 | icv->run_sched_modifier = modifier; | |
611 | break; | |
612 | case omp_sched_auto: | |
613 | break; | |
614 | default: | |
615 | return; | |
616 | } | |
617 | icv->run_sched_var = kind; | |
618 | } | |
619 | ||
620 | void | |
621 | omp_get_schedule (omp_sched_t *kind, int *modifier) | |
622 | { | |
623 | struct gomp_task_icv *icv = gomp_icv (false); | |
624 | *kind = icv->run_sched_var; | |
625 | *modifier = icv->run_sched_modifier; | |
626 | } | |
627 | ||
628 | int | |
629 | omp_get_max_threads (void) | |
630 | { | |
631 | struct gomp_task_icv *icv = gomp_icv (false); | |
632 | return icv->nthreads_var; | |
633 | } | |
634 | ||
635 | int | |
636 | omp_get_thread_limit (void) | |
637 | { | |
638 | return gomp_thread_limit_var > INT_MAX ? INT_MAX : gomp_thread_limit_var; | |
639 | } | |
640 | ||
641 | void | |
642 | omp_set_max_active_levels (int max_levels) | |
643 | { | |
80f046cc | 644 | if (max_levels >= 0) |
a68ab351 JJ |
645 | gomp_max_active_levels_var = max_levels; |
646 | } | |
647 | ||
648 | int | |
649 | omp_get_max_active_levels (void) | |
650 | { | |
651 | return gomp_max_active_levels_var; | |
953ff289 DN |
652 | } |
653 | ||
654 | ialias (omp_set_dynamic) | |
655 | ialias (omp_set_nested) | |
656 | ialias (omp_set_num_threads) | |
657 | ialias (omp_get_dynamic) | |
658 | ialias (omp_get_nested) | |
a68ab351 JJ |
659 | ialias (omp_set_schedule) |
660 | ialias (omp_get_schedule) | |
661 | ialias (omp_get_max_threads) | |
662 | ialias (omp_get_thread_limit) | |
663 | ialias (omp_set_max_active_levels) | |
664 | ialias (omp_get_max_active_levels) |