Annotation of libaitsched/src/aitsched.c, revision 1.14
1.1 misho 1: /*************************************************************************
2: * (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
1.14 ! misho 6: * $Id: aitsched.c,v 1.13.2.1 2012/08/08 23:00:05 misho Exp $
1.1 misho 7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
1.6 misho 15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
1.1 misho 16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #include "global.h"
47: #include "hooks.h"
48:
49:
50: #pragma GCC visibility push(hidden)
51:
52: int sched_Errno;
53: char sched_Error[STRSIZ];
54:
55: #pragma GCC visibility pop
56:
57:
58: // sched_GetErrno() Get error code of last operation
59: inline int
60: sched_GetErrno()
61: {
62: return sched_Errno;
63: }
64:
65: // sched_GetError() Get error text of last operation
66: inline const char *
67: sched_GetError()
68: {
69: return sched_Error;
70: }
71:
72: // sched_SetErr() Set error to variables for internal use!!!
73: inline void
74: sched_SetErr(int eno, char *estr, ...)
75: {
76: va_list lst;
77:
78: sched_Errno = eno;
79: memset(sched_Error, 0, sizeof sched_Error);
80: va_start(lst, estr);
81: vsnprintf(sched_Error, sizeof sched_Error, estr, lst);
82: va_end(lst);
83: }
84:
85: /* Init and prepare scheduler functions */
86:
87: /*
1.2 misho 88: * schedRegisterHooks() - Register IO handles and bind tasks to it
1.6 misho 89: *
1.2 misho 90: * @root = root task
91: * return: -1 error or 0 ok
92: */
93: int
94: schedRegisterHooks(sched_root_task_t * __restrict root)
95: {
1.7 misho 96: assert(root);
1.2 misho 97:
98: if (root->root_hooks.hook_root.fini)
99: root->root_hooks.hook_root.fini(root, NULL);
100: memset(&root->root_hooks, 0, sizeof root->root_hooks);
101:
102: root->root_hooks.hook_add.read = sched_hook_read;
103: root->root_hooks.hook_add.write = sched_hook_write;
1.9 misho 104: root->root_hooks.hook_add.alarm = sched_hook_alarm;
1.10 misho 105: root->root_hooks.hook_add.node = sched_hook_node;
106: root->root_hooks.hook_add.proc = sched_hook_proc;
107: root->root_hooks.hook_add.signal = sched_hook_signal;
108: #ifdef EVFILT_USER
109: root->root_hooks.hook_add.user = sched_hook_user;
110: #endif
1.2 misho 111:
112: root->root_hooks.hook_exec.cancel = sched_hook_cancel;
113: root->root_hooks.hook_exec.fetch = sched_hook_fetch;
1.3 misho 114: root->root_hooks.hook_exec.exception = sched_hook_exception;
1.2 misho 115:
116: root->root_hooks.hook_root.init = sched_hook_init;
117: root->root_hooks.hook_root.fini = sched_hook_fini;
118: return 0;
119: }
120:
121: /*
1.1 misho 122: * schedInit() - Init scheduler
1.6 misho 123: *
1.1 misho 124: * @data = optional data if !=NULL
125: * @datlen = data len if data is set
126: * return: allocated root task if ok or NULL error
127: */
128: sched_root_task_t *
129: schedInit(void ** __restrict data, size_t datlen)
130: {
131: sched_root_task_t *root = NULL;
132: int (*func)(sched_root_task_t *);
1.5 misho 133: #ifdef HAVE_LIBPTHREAD
134: register int i;
135: #endif
1.1 misho 136:
137: root = malloc(sizeof(sched_root_task_t));
1.2 misho 138: if (!root) {
139: LOGERR;
140: } else {
1.1 misho 141: memset(root, 0, sizeof(sched_root_task_t));
1.5 misho 142:
1.13 misho 143: /* set default maximum regular task hit misses */
144: root->root_miss = MAX_TASK_MISS;
145:
1.5 misho 146: /* INFINIT polling period by default */
147: sched_timespecinf(&root->root_poll);
148:
149: #ifdef HAVE_LIBPTHREAD
150: for (i = 0; i < taskMAX; i++)
151: if (pthread_mutex_init(&root->root_mtx[i], NULL)) {
152: LOGERR;
153: while (i)
154: pthread_mutex_destroy(&root->root_mtx[--i]);
155: free(root);
156: return NULL;
157: }
158:
159: for (i = 0; i < taskMAX; i++)
160: pthread_mutex_lock(&root->root_mtx[i]);
161: #endif
162:
1.2 misho 163: TAILQ_INIT(&root->root_read);
164: TAILQ_INIT(&root->root_write);
1.10 misho 165: TAILQ_INIT(&root->root_timer);
1.9 misho 166: TAILQ_INIT(&root->root_alarm);
1.10 misho 167: TAILQ_INIT(&root->root_node);
168: TAILQ_INIT(&root->root_proc);
1.12 misho 169: TAILQ_INIT(&root->root_signal);
170: TAILQ_INIT(&root->root_aio);
171: TAILQ_INIT(&root->root_lio);
1.10 misho 172: TAILQ_INIT(&root->root_user);
1.2 misho 173: TAILQ_INIT(&root->root_event);
1.13 misho 174: TAILQ_INIT(&root->root_task);
1.11 misho 175: TAILQ_INIT(&root->root_suspend);
1.2 misho 176: TAILQ_INIT(&root->root_ready);
177: TAILQ_INIT(&root->root_unuse);
1.1 misho 178:
1.5 misho 179: #ifdef HAVE_LIBPTHREAD
180: for (i = 0; i < taskMAX; i++)
181: pthread_mutex_unlock(&root->root_mtx[i]);
182: #endif
183:
1.1 misho 184: if (data && *data) {
185: if (datlen) {
186: root->root_data.iov_base = *data;
187: root->root_data.iov_len = datlen;
1.3 misho 188: } else { /* if datlen == 0, switch to callbacks init mode */
189: /* little hack :) for correct initialization of scheduler */
1.2 misho 190: func = (int(*)(sched_root_task_t*)) data;
1.1 misho 191: func(root);
192: }
193: }
1.2 misho 194:
195: if (root->root_hooks.hook_root.init)
196: root->root_hooks.hook_root.init(root, NULL);
1.1 misho 197: }
198:
199: return root;
200: }
201:
202: /*
203: * schedEnd() - End scheduler & free all resources
1.6 misho 204: *
1.1 misho 205: * @root = root task
206: * return: -1 error or 0 ok
207: */
208: int
1.2 misho 209: schedEnd(sched_root_task_t ** __restrict root)
1.1 misho 210: {
1.7 misho 211: sched_task_t *task, *tmp;
1.5 misho 212: #ifdef HAVE_LIBPTHREAD
213: register int i;
214: #endif
1.1 misho 215:
1.2 misho 216: if (!root || !*root)
1.1 misho 217: return -1;
218:
1.10 misho 219: TAILQ_FOREACH_SAFE(task, &(*root)->root_read, task_node, tmp)
220: schedCancel(task);
221: TAILQ_FOREACH_SAFE(task, &(*root)->root_write, task_node, tmp)
1.1 misho 222: schedCancel(task);
1.10 misho 223: TAILQ_FOREACH_SAFE(task, &(*root)->root_timer, task_node, tmp)
224: schedCancel(task);
225: TAILQ_FOREACH_SAFE(task, &(*root)->root_alarm, task_node, tmp)
226: schedCancel(task);
227: TAILQ_FOREACH_SAFE(task, &(*root)->root_node, task_node, tmp)
228: schedCancel(task);
229: TAILQ_FOREACH_SAFE(task, &(*root)->root_proc, task_node, tmp)
1.1 misho 230: schedCancel(task);
1.12 misho 231: TAILQ_FOREACH_SAFE(task, &(*root)->root_signal, task_node, tmp)
232: schedCancel(task);
233: TAILQ_FOREACH_SAFE(task, &(*root)->root_aio, task_node, tmp)
234: schedCancel(task);
235: TAILQ_FOREACH_SAFE(task, &(*root)->root_lio, task_node, tmp)
236: schedCancel(task);
1.10 misho 237: TAILQ_FOREACH_SAFE(task, &(*root)->root_user, task_node, tmp)
1.9 misho 238: schedCancel(task);
1.10 misho 239: TAILQ_FOREACH_SAFE(task, &(*root)->root_event, task_node, tmp)
1.1 misho 240: schedCancel(task);
1.13 misho 241: TAILQ_FOREACH_SAFE(task, &(*root)->root_task, task_node, tmp)
1.5 misho 242: schedCancel(task);
1.11 misho 243: TAILQ_FOREACH_SAFE(task, &(*root)->root_suspend, task_node, tmp)
244: schedCancel(task);
1.10 misho 245: TAILQ_FOREACH_SAFE(task, &(*root)->root_ready, task_node, tmp)
1.1 misho 246: schedCancel(task);
247:
1.5 misho 248: #ifdef HAVE_LIBPTHREAD
249: pthread_mutex_lock(&(*root)->root_mtx[taskUNUSE]);
250: #endif
1.10 misho 251: TAILQ_FOREACH_SAFE(task, &(*root)->root_unuse, task_node, tmp) {
1.2 misho 252: TAILQ_REMOVE(&(*root)->root_unuse, task, task_node);
1.1 misho 253: free(task);
254: }
1.5 misho 255: #ifdef HAVE_LIBPTHREAD
256: pthread_mutex_unlock(&(*root)->root_mtx[taskUNUSE]);
257: #endif
1.1 misho 258:
1.2 misho 259: if ((*root)->root_hooks.hook_root.fini)
260: (*root)->root_hooks.hook_root.fini(*root, NULL);
1.1 misho 261:
1.5 misho 262: #ifdef HAVE_LIBPTHREAD
263: for (i = 0; i < taskMAX; i++)
264: pthread_mutex_destroy(&(*root)->root_mtx[i]);
265: #endif
266:
1.2 misho 267: free(*root);
268: *root = NULL;
1.1 misho 269: return 0;
270: }
271:
272: /*
273: * schedCall() - Call task execution function
1.6 misho 274: *
1.1 misho 275: * @task = current task
276: * return: !=NULL error or =NULL ok
277: */
278: inline void *
279: schedCall(sched_task_t * __restrict task)
280: {
1.4 misho 281: void *ptr = (void*) -1;
282:
1.1 misho 283: if (!task)
1.4 misho 284: return ptr;
285:
286: if (!TASK_ISLOCKED(task))
287: TASK_LOCK(task);
1.1 misho 288:
1.4 misho 289: ptr = task->task_func(task);
290:
291: TASK_UNLOCK(task);
292: return ptr;
1.1 misho 293: }
294:
295: /*
296: * schedFetch() - Fetch ready task
1.6 misho 297: *
1.1 misho 298: * @root = root task
299: * return: =NULL error or !=NULL ready task
300: */
301: inline void *
302: schedFetch(sched_root_task_t * __restrict root)
303: {
304: void *ptr;
305:
306: if (!root)
307: return NULL;
308:
309: if (root->root_hooks.hook_exec.fetch)
310: ptr = root->root_hooks.hook_exec.fetch(root, NULL);
311: else
312: ptr = NULL;
313:
314: return ptr;
315: }
316:
317: /*
1.10 misho 318: * schedTrigger() - Triggering USER task
319: *
320: * @task = task
321: * return: -1 error or 0 ok
322: */
323: int
324: schedTrigger(sched_task_t * __restrict task)
325: {
326: #ifndef EVFILT_USER
327: sched_SetErr(ENOTSUP, "Not supported kevent() filter");
328: return -1;
329: #else
330: struct kevent chg[1];
331: struct timespec timeout = { 0, 0 };
332:
333: if (!task || !TASK_ROOT(task))
334: return -1;
335:
336: #ifdef __NetBSD__
337: EV_SET(chg, TASK_VAL(task), EVFILT_USER, 0, NOTE_TRIGGER, 0, (intptr_t) TASK_VAL(task));
338: #else
339: EV_SET(chg, TASK_VAL(task), EVFILT_USER, 0, NOTE_TRIGGER, 0, (void*) TASK_VAL(task));
340: #endif
341: if (kevent(TASK_ROOT(task)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
342: LOGERR;
343: return -1;
344: }
345:
346: return 0;
347: #endif
348: }
349:
350: /*
1.1 misho 351: * schedCancel() - Cancel task from scheduler
1.6 misho 352: *
1.1 misho 353: * @task = task
354: * return: -1 error or 0 ok
355: */
356: int
357: schedCancel(sched_task_t * __restrict task)
358: {
359: sched_queue_t *queue;
360:
1.5 misho 361: if (!task || !TASK_ROOT(task))
1.1 misho 362: return -1;
363:
1.5 misho 364: if (TASK_ROOT(task)->root_hooks.hook_exec.cancel)
365: if (TASK_ROOT(task)->root_hooks.hook_exec.cancel(task, NULL))
1.1 misho 366: return -1;
367:
1.5 misho 368: switch (TASK_TYPE(task)) {
1.1 misho 369: case taskREAD:
1.5 misho 370: queue = &TASK_ROOT(task)->root_read;
1.1 misho 371: break;
372: case taskWRITE:
1.5 misho 373: queue = &TASK_ROOT(task)->root_write;
1.1 misho 374: break;
1.10 misho 375: case taskTIMER:
376: queue = &TASK_ROOT(task)->root_timer;
377: break;
1.9 misho 378: case taskALARM:
379: queue = &TASK_ROOT(task)->root_alarm;
380: break;
1.10 misho 381: case taskNODE:
382: queue = &TASK_ROOT(task)->root_node;
383: break;
384: case taskPROC:
385: queue = &TASK_ROOT(task)->root_proc;
386: break;
1.12 misho 387: case taskSIGNAL:
388: queue = &TASK_ROOT(task)->root_signal;
389: break;
390: case taskAIO:
391: queue = &TASK_ROOT(task)->root_aio;
392: break;
393: case taskLIO:
394: queue = &TASK_ROOT(task)->root_lio;
395: break;
1.10 misho 396: case taskUSER:
397: queue = &TASK_ROOT(task)->root_user;
398: break;
1.1 misho 399: case taskEVENT:
1.5 misho 400: queue = &TASK_ROOT(task)->root_event;
401: break;
1.13 misho 402: case taskTASK:
403: queue = &TASK_ROOT(task)->root_task;
1.1 misho 404: break;
1.11 misho 405: case taskSUSPEND:
406: queue = &TASK_ROOT(task)->root_suspend;
407: break;
1.1 misho 408: case taskREADY:
1.5 misho 409: queue = &TASK_ROOT(task)->root_ready;
1.1 misho 410: break;
411: default:
412: queue = NULL;
413: }
1.5 misho 414: if (queue) {
415: #ifdef HAVE_LIBPTHREAD
416: pthread_mutex_lock(&TASK_ROOT(task)->root_mtx[TASK_TYPE(task)]);
417: #endif
1.10 misho 418: TAILQ_REMOVE(queue, TASK_ID(task), task_node);
1.5 misho 419: #ifdef HAVE_LIBPTHREAD
420: pthread_mutex_unlock(&TASK_ROOT(task)->root_mtx[TASK_TYPE(task)]);
421: #endif
422: }
423: if (TASK_TYPE(task) != taskUNUSE)
1.4 misho 424: _sched_unuseTask(task);
1.1 misho 425:
426: return 0;
427: }
428:
429: /*
430: * schedCancelby() - Cancel task from scheduler by criteria
1.6 misho 431: *
1.1 misho 432: * @root = root task
1.5 misho 433: * @type = cancel from queue type, if =taskMAX cancel same task from all queues
1.10 misho 434: * @criteria = find task by criteria
1.11 misho 435: * [CRITERIA_ANY|CRITERIA_CALL|CRITERIA_ARG|CRITERIA_FD|CRITERIA_VAL|CRITERIA_ID|CRITERIA_TS|CRITERIA_DATA]
1.1 misho 436: * @param = search parameter
437: * @hook = custom cleanup hook function, may be NULL
1.3 misho 438: * return: -1 error, -2 error in sub-stage cancel execution, -3 error from custom hook or 0 ok
1.1 misho 439: */
440: int
1.5 misho 441: schedCancelby(sched_root_task_t * __restrict root, sched_task_type_t type,
1.1 misho 442: u_char criteria, void *param, sched_hook_func_t hook)
443: {
1.8 misho 444: sched_task_t *task, *tmp;
1.5 misho 445: sched_queue_t *queue;
1.8 misho 446: register int flg = 0;
1.1 misho 447:
448: if (!root)
449: return -1;
1.10 misho 450: /* if type == taskMAX check in all queues */
1.5 misho 451: if (type == taskMAX) {
452: if (schedCancelby(root, taskREAD, criteria, param, hook))
1.1 misho 453: return -2;
1.5 misho 454: if (schedCancelby(root, taskWRITE, criteria, param, hook))
1.1 misho 455: return -2;
1.10 misho 456: if (schedCancelby(root, taskTIMER, criteria, param, hook))
457: return -2;
1.9 misho 458: if (schedCancelby(root, taskALARM, criteria, param, hook))
459: return -2;
1.10 misho 460: if (schedCancelby(root, taskNODE, criteria, param, hook))
461: return -2;
462: if (schedCancelby(root, taskPROC, criteria, param, hook))
463: return -2;
1.12 misho 464: if (schedCancelby(root, taskSIGNAL, criteria, param, hook))
465: return -2;
466: if (schedCancelby(root, taskAIO, criteria, param, hook))
467: return -2;
468: if (schedCancelby(root, taskLIO, criteria, param, hook))
469: return -2;
1.10 misho 470: if (schedCancelby(root, taskUSER, criteria, param, hook))
471: return -2;
1.5 misho 472: if (schedCancelby(root, taskEVENT, criteria, param, hook))
1.1 misho 473: return -2;
1.13 misho 474: if (schedCancelby(root, taskTASK, criteria, param, hook))
1.1 misho 475: return -2;
1.11 misho 476: if (schedCancelby(root, taskSUSPEND, criteria, param, hook))
477: return -2;
1.5 misho 478: if (schedCancelby(root, taskREADY, criteria, param, hook))
1.1 misho 479: return -2;
480: return 0;
481: }
1.10 misho 482: /* choosen queue */
1.5 misho 483: switch (type) {
484: case taskREAD:
485: queue = &root->root_read;
486: break;
487: case taskWRITE:
488: queue = &root->root_write;
489: break;
1.10 misho 490: case taskTIMER:
491: queue = &root->root_timer;
492: break;
1.9 misho 493: case taskALARM:
494: queue = &root->root_alarm;
495: break;
1.10 misho 496: case taskNODE:
497: queue = &root->root_node;
498: break;
499: case taskPROC:
500: queue = &root->root_proc;
501: break;
1.12 misho 502: case taskSIGNAL:
503: queue = &root->root_signal;
504: break;
505: case taskAIO:
506: queue = &root->root_aio;
507: break;
508: case taskLIO:
509: queue = &root->root_lio;
510: break;
1.10 misho 511: case taskUSER:
512: queue = &root->root_user;
513: break;
1.5 misho 514: case taskEVENT:
515: queue = &root->root_event;
516: break;
1.13 misho 517: case taskTASK:
518: queue = &root->root_task;
1.5 misho 519: break;
1.11 misho 520: case taskSUSPEND:
521: queue = &root->root_suspend;
522: break;
1.5 misho 523: case taskREADY:
524: queue = &root->root_ready;
525: break;
526: default:
527: return 0;
528: }
1.1 misho 529:
1.5 misho 530: #ifdef HAVE_LIBPTHREAD
531: pthread_mutex_lock(&root->root_mtx[type]);
532: #endif
1.8 misho 533: TAILQ_FOREACH_SAFE(task, queue, task_node, tmp) {
534: flg ^= flg;
535: switch (criteria) {
1.10 misho 536: case CRITERIA_ANY:
537: flg = 1;
538: break;
1.8 misho 539: case CRITERIA_CALL:
540: if (TASK_FUNC(task) == (sched_task_func_t) param)
541: flg = 1;
1.1 misho 542: break;
1.8 misho 543: case CRITERIA_ARG:
544: if (TASK_ARG(task) == param)
545: flg = 1;
1.1 misho 546: break;
1.8 misho 547: case CRITERIA_FD:
548: if (TASK_FD(task) == (intptr_t) param)
549: flg = 1;
1.1 misho 550: break;
1.11 misho 551: case CRITERIA_ID:
1.8 misho 552: case CRITERIA_VAL:
553: if (TASK_VAL(task) == (u_long) param)
554: flg = 1;
1.1 misho 555: break;
1.8 misho 556: case CRITERIA_TS:
557: if (!sched_timespeccmp(&TASK_TS(task), (struct timespec*) param, -))
558: flg = 1;
1.1 misho 559: break;
1.10 misho 560: case CRITERIA_DATA:
561: if (TASK_DATA(task) == param)
562: flg = 1;
563: break;
1.8 misho 564: default:
565: sched_SetErr(EINVAL, "Invalid parameter criteria %d", criteria);
566: flg = -1;
567: }
1.10 misho 568: if (flg < 0) /* error */
1.8 misho 569: break;
570: /* cancel choosen task */
571: if (flg > 0) {
572: if (TASK_ROOT(task)->root_hooks.hook_exec.cancel)
573: if (TASK_ROOT(task)->root_hooks.hook_exec.cancel(task, NULL)) {
574: flg = -1;
575: break;
576: }
577: /* custom hook */
578: if (hook)
579: if (hook(task, NULL)) {
580: flg = -3;
581: break;
582: }
583:
584: TAILQ_REMOVE(queue, task, task_node);
585: if (TASK_TYPE(task) != taskUNUSE)
586: _sched_unuseTask(task);
587:
588: flg ^= flg; /* ok */
1.1 misho 589: }
1.8 misho 590: }
1.5 misho 591: #ifdef HAVE_LIBPTHREAD
592: pthread_mutex_unlock(&root->root_mtx[type]);
593: #endif
1.8 misho 594: return flg;
1.1 misho 595: }
596:
597: /*
598: * schedRun() - Scheduler *run loop*
1.6 misho 599: *
1.1 misho 600: * @root = root task
1.2 misho 601: * @killState = kill condition variable, if !=0 stop scheduler loop
1.1 misho 602: * return: -1 error or 0 ok
603: */
604: int
1.7 misho 605: schedRun(sched_root_task_t *root, volatile intptr_t * __restrict killState)
1.1 misho 606: {
607: sched_task_t *task;
608:
609: if (!root)
610: return -1;
611:
612: if (root->root_hooks.hook_exec.run)
613: if (root->root_hooks.hook_exec.run(root, NULL))
614: return -1;
1.7 misho 615:
616: if (killState) {
617: if (root->root_hooks.hook_exec.condition)
618: /* condition scheduler loop */
619: while (root && root->root_hooks.hook_exec.fetch &&
620: root->root_hooks.hook_exec.condition &&
621: root->root_hooks.hook_exec.condition(root, (void*) killState)) {
622: if ((task = root->root_hooks.hook_exec.fetch(root, NULL)))
1.12 misho 623: root->root_ret = schedCall(task);
1.7 misho 624: }
625: else
626: /* trigger scheduler loop */
627: while (!*killState && root && root->root_hooks.hook_exec.fetch) {
628: if ((task = root->root_hooks.hook_exec.fetch(root, NULL)))
1.12 misho 629: root->root_ret = schedCall(task);
1.7 misho 630: }
631: } else
632: /* infinite scheduler loop */
633: while (root && root->root_hooks.hook_exec.fetch)
634: if ((task = root->root_hooks.hook_exec.fetch(root, NULL)))
1.12 misho 635: root->root_ret = schedCall(task);
1.1 misho 636:
637: return 0;
638: }
1.5 misho 639:
640: /*
641: * schedPolling() - Polling timeout period if no timer task is present
1.6 misho 642: *
1.5 misho 643: * @root = root task
644: * @ts = timeout polling period, if ==NULL INFINIT timeout
645: * @tsold = old timeout polling if !=NULL
646: * return: -1 error or 0 ok
647: */
648: inline int
649: schedPolling(sched_root_task_t * __restrict root, struct timespec * __restrict ts,
650: struct timespec * __restrict tsold)
651: {
652: if (!root)
653: return -1;
654:
655: if (tsold)
656: *tsold = root->root_poll;
657:
658: if (!ts)
659: sched_timespecinf(&root->root_poll);
660: else
661: root->root_poll = *ts;
662:
663: return 0;
664: }
1.6 misho 665:
666: /*
667: * schedTermCondition() - Activate hook for scheduler condition kill
668: *
669: * @root = root task
670: * @condValue = condition value, kill schedRun() if condValue == killState
1.13 misho 671: * return: -1 error or 0 ok
1.6 misho 672: */
673: inline int
674: schedTermCondition(sched_root_task_t * __restrict root, intptr_t condValue)
675: {
676: if (!root)
677: return -1;
678:
679: root->root_cond = condValue;
680: root->root_hooks.hook_exec.condition = sched_hook_condition;
681: return 0;
682: }
1.11 misho 683:
684: /*
685: * schedResumeby() - Resume suspended task
686: *
687: * @root = root task
688: * @criteria = find task by criteria
689: * [CRITERIA_ANY|CRITERIA_ID|CRITERIA_DATA]
690: * @param = search parameter (sched_task_t *task| u_long id)
691: * return: -1 error or 0 resumed ok
692: */
693: int
694: schedResumeby(sched_root_task_t * __restrict root, u_char criteria, void *param)
695: {
696: sched_task_t *task, *tmp;
697: register int flg = 0;
698:
699: if (!root)
700: return -1;
701:
702: #ifdef HAVE_LIBPTHREAD
703: pthread_mutex_lock(&root->root_mtx[taskSUSPEND]);
704: #endif
705: TAILQ_FOREACH_SAFE(task, &root->root_suspend, task_node, tmp) {
706: flg ^= flg;
707: switch (criteria) {
708: case CRITERIA_ANY:
709: flg = 1;
710: break;
711: case CRITERIA_ID:
712: if (TASK_VAL(task) == (u_long) param)
713: flg = 1;
714: break;
715: case CRITERIA_DATA:
716: if (TASK_ID(task) == (sched_task_t*) param)
717: flg = 1;
718: break;
719: default:
720: sched_SetErr(EINVAL, "Invalid parameter criteria %d", criteria);
721: flg = -1;
722: }
723: if (flg < 0)
724: break;
725: /* resume choosen task */
726: if (flg > 0) {
727: if (root->root_hooks.hook_exec.resume)
728: if (root->root_hooks.hook_exec.resume(task, NULL)) {
729: flg = -1;
730: break;
731: }
732:
733: TAILQ_REMOVE(&root->root_suspend, task, task_node);
734:
735: task->task_type = taskREADY;
736: #ifdef HAVE_LIBPTHREAD
737: pthread_mutex_lock(&root->root_mtx[taskREADY]);
738: #endif
739: TAILQ_INSERT_TAIL(&root->root_ready, task, task_node);
740: #ifdef HAVE_LIBPTHREAD
741: pthread_mutex_unlock(&root->root_mtx[taskREADY]);
742: #endif
743:
744: flg ^= flg; /* ok */
745: }
746: }
747: #ifdef HAVE_LIBPTHREAD
748: pthread_mutex_unlock(&root->root_mtx[taskSUSPEND]);
749: #endif
750:
751: return flg;
752: }
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