1: /*************************************************************************
2: * (C) 2011 AITNET ltd - Sofia/Bulgaria - <misho@aitbg.com>
3: * by Michael Pounov <misho@openbsd-bg.org>
4: *
5: * $Author: misho $
6: * $Id: aitsched.c,v 1.22 2013/11/14 21:37:27 misho Exp $
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:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
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: int
60: sched_GetErrno()
61: {
62: return sched_Errno;
63: }
64:
65: // sched_GetError() Get error text of last operation
66: const char *
67: sched_GetError()
68: {
69: return sched_Error;
70: }
71:
72: // sched_SetErr() Set error to variables for internal use!!!
73: 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: /*
88: * schedRegisterHooks() - Register IO handles and bind tasks to it
89: *
90: * @root = root task
91: * return: -1 error or 0 ok
92: */
93: int
94: schedRegisterHooks(sched_root_task_t * __restrict root)
95: {
96: assert(root);
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;
104: root->root_hooks.hook_add.alarm = sched_hook_alarm;
105: #if defined(HAVE_TIMER_CREATE) && defined(HAVE_TIMER_SETTIME)
106: root->root_hooks.hook_add.rtc = sched_hook_rtc;
107: #endif
108: root->root_hooks.hook_add.node = sched_hook_node;
109: root->root_hooks.hook_add.proc = sched_hook_proc;
110: root->root_hooks.hook_add.signal = sched_hook_signal;
111: #ifdef EVFILT_USER
112: root->root_hooks.hook_add.user = sched_hook_user;
113: #endif
114: #ifdef HAVE_LIBPTHREAD
115: root->root_hooks.hook_add.thread = sched_hook_thread;
116: #endif
117:
118: root->root_hooks.hook_exec.cancel = sched_hook_cancel;
119: root->root_hooks.hook_exec.fetch = sched_hook_fetch;
120: root->root_hooks.hook_exec.exception = sched_hook_exception;
121:
122: root->root_hooks.hook_root.init = sched_hook_init;
123: root->root_hooks.hook_root.fini = sched_hook_fini;
124: return 0;
125: }
126:
127: /*
128: * schedInit() - Init scheduler
129: *
130: * @data = optional data if !=NULL
131: * @datlen = data len if data is set
132: * return: allocated root task if ok or NULL error
133: */
134: sched_root_task_t *
135: schedInit(void ** __restrict data, size_t datlen)
136: {
137: sched_root_task_t *root = NULL;
138: int (*func)(sched_root_task_t *);
139: #ifdef HAVE_LIBPTHREAD
140: register int i;
141: #endif
142:
143: root = malloc(sizeof(sched_root_task_t));
144: if (!root) {
145: LOGERR;
146: } else {
147: memset(root, 0, sizeof(sched_root_task_t));
148:
149: /* set default maximum regular task hit misses */
150: root->root_miss = MAX_TASK_MISS;
151:
152: /* INFINIT polling period by default */
153: sched_timespecinf(&root->root_poll);
154:
155: #ifdef HAVE_LIBPTHREAD
156: for (i = 0; i < taskMAX; i++)
157: if ((errno = pthread_mutex_init(&root->root_mtx[i], NULL))) {
158: LOGERR;
159: while (i)
160: pthread_mutex_destroy(&root->root_mtx[--i]);
161: free(root);
162: return NULL;
163: }
164:
165: for (i = 0; i < taskMAX; i++)
166: pthread_mutex_lock(&root->root_mtx[i]);
167: #endif
168:
169: TAILQ_INIT(&root->root_read);
170: TAILQ_INIT(&root->root_write);
171: TAILQ_INIT(&root->root_timer);
172: TAILQ_INIT(&root->root_alarm);
173: TAILQ_INIT(&root->root_rtc);
174: TAILQ_INIT(&root->root_node);
175: TAILQ_INIT(&root->root_proc);
176: TAILQ_INIT(&root->root_signal);
177: TAILQ_INIT(&root->root_aio);
178: TAILQ_INIT(&root->root_lio);
179: TAILQ_INIT(&root->root_user);
180: TAILQ_INIT(&root->root_event);
181: TAILQ_INIT(&root->root_task);
182: TAILQ_INIT(&root->root_suspend);
183: TAILQ_INIT(&root->root_ready);
184: TAILQ_INIT(&root->root_unuse);
185: TAILQ_INIT(&root->root_thread);
186:
187: #ifdef HAVE_LIBPTHREAD
188: for (i = 0; i < taskMAX; i++)
189: pthread_mutex_unlock(&root->root_mtx[i]);
190: #endif
191:
192: if (data && *data) {
193: if (datlen) {
194: root->root_data.iov_base = *data;
195: root->root_data.iov_len = datlen;
196: } else { /* if datlen == 0, switch to callbacks init mode */
197: /* little hack :) for correct initialization of scheduler */
198: func = (int(*)(sched_root_task_t*)) data;
199: func(root);
200: }
201: }
202:
203: if (root->root_hooks.hook_root.init)
204: root->root_hooks.hook_root.init(root, NULL);
205: }
206:
207: return root;
208: }
209:
210: /*
211: * schedEnd() - End scheduler & free all resources
212: *
213: * @root = root task
214: * return: -1 error or 0 ok
215: */
216: int
217: schedEnd(sched_root_task_t ** __restrict root)
218: {
219: sched_task_t *task, *tmp;
220: #ifdef HAVE_LIBPTHREAD
221: register int i;
222: #endif
223:
224: if (!root || !*root)
225: return -1;
226:
227: TAILQ_FOREACH_SAFE(task, &(*root)->root_read, task_node, tmp)
228: schedCancel(task);
229: TAILQ_FOREACH_SAFE(task, &(*root)->root_write, task_node, tmp)
230: schedCancel(task);
231: TAILQ_FOREACH_SAFE(task, &(*root)->root_timer, task_node, tmp)
232: schedCancel(task);
233: TAILQ_FOREACH_SAFE(task, &(*root)->root_alarm, task_node, tmp)
234: schedCancel(task);
235: TAILQ_FOREACH_SAFE(task, &(*root)->root_rtc, task_node, tmp)
236: schedCancel(task);
237: TAILQ_FOREACH_SAFE(task, &(*root)->root_node, task_node, tmp)
238: schedCancel(task);
239: TAILQ_FOREACH_SAFE(task, &(*root)->root_proc, task_node, tmp)
240: schedCancel(task);
241: TAILQ_FOREACH_SAFE(task, &(*root)->root_signal, task_node, tmp)
242: schedCancel(task);
243: TAILQ_FOREACH_SAFE(task, &(*root)->root_aio, task_node, tmp)
244: schedCancel(task);
245: TAILQ_FOREACH_SAFE(task, &(*root)->root_lio, task_node, tmp)
246: schedCancel(task);
247: TAILQ_FOREACH_SAFE(task, &(*root)->root_user, task_node, tmp)
248: schedCancel(task);
249: TAILQ_FOREACH_SAFE(task, &(*root)->root_event, task_node, tmp)
250: schedCancel(task);
251: TAILQ_FOREACH_SAFE(task, &(*root)->root_suspend, task_node, tmp)
252: schedCancel(task);
253: TAILQ_FOREACH_SAFE(task, &(*root)->root_ready, task_node, tmp)
254: schedCancel(task);
255: TAILQ_FOREACH_SAFE(task, &(*root)->root_thread, task_node, tmp)
256: schedCancel(task);
257: TAILQ_FOREACH_SAFE(task, &(*root)->root_task, task_node, tmp)
258: schedCancel(task);
259:
260: #ifdef HAVE_LIBPTHREAD
261: pthread_mutex_lock(&(*root)->root_mtx[taskUNUSE]);
262: #endif
263: TAILQ_FOREACH_SAFE(task, &(*root)->root_unuse, task_node, tmp) {
264: TAILQ_REMOVE(&(*root)->root_unuse, task, task_node);
265: free(task);
266: }
267: #ifdef HAVE_LIBPTHREAD
268: pthread_mutex_unlock(&(*root)->root_mtx[taskUNUSE]);
269: #endif
270:
271: if ((*root)->root_hooks.hook_root.fini)
272: (*root)->root_hooks.hook_root.fini(*root, NULL);
273:
274: #ifdef HAVE_LIBPTHREAD
275: for (i = 0; i < taskMAX; i++)
276: pthread_mutex_destroy(&(*root)->root_mtx[i]);
277: #endif
278:
279: free(*root);
280: *root = NULL;
281: return 0;
282: }
283:
284: /*
285: * schedCall() - Call task execution function
286: *
287: * @task = current task
288: * return: !=NULL error or =NULL ok
289: */
290: void *
291: schedCall(sched_task_t * __restrict task)
292: {
293: void *ptr = (void*) -1;
294:
295: if (!task)
296: return ptr;
297:
298: if (!TASK_ISLOCKED(task))
299: TASK_LOCK(task);
300:
301: ptr = task->task_func(task);
302:
303: TASK_UNLOCK(task);
304: return ptr;
305: }
306:
307: /*
308: * schedFetch() - Fetch ready task
309: *
310: * @root = root task
311: * return: =NULL error or !=NULL ready task
312: */
313: void *
314: schedFetch(sched_root_task_t * __restrict root)
315: {
316: void *ptr;
317:
318: if (!root)
319: return NULL;
320:
321: if (root->root_hooks.hook_exec.fetch)
322: ptr = root->root_hooks.hook_exec.fetch(root, NULL);
323: else
324: ptr = NULL;
325:
326: return ptr;
327: }
328:
329: /*
330: * schedTrigger() - Triggering USER task
331: *
332: * @task = task
333: * return: -1 error or 0 ok
334: */
335: int
336: schedTrigger(sched_task_t * __restrict task)
337: {
338: #ifndef EVFILT_USER
339: sched_SetErr(ENOTSUP, "Not supported kevent() filter");
340: return -1;
341: #else
342: struct kevent chg[1];
343: struct timespec timeout = { 0, 0 };
344:
345: if (!task || !TASK_ROOT(task))
346: return -1;
347:
348: #ifdef __NetBSD__
349: EV_SET(chg, TASK_VAL(task), EVFILT_USER, 0, NOTE_TRIGGER, 0, (intptr_t) TASK_VAL(task));
350: #else
351: EV_SET(chg, TASK_VAL(task), EVFILT_USER, 0, NOTE_TRIGGER, 0, (void*) TASK_VAL(task));
352: #endif
353: if (kevent(TASK_ROOT(task)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
354: LOGERR;
355: return -1;
356: }
357:
358: return 0;
359: #endif
360: }
361:
362: /*
363: * schedQuery() - Query task in scheduler
364: *
365: * @task = task
366: * return: -1 error, 0 found and 1 not found
367: */
368: int
369: schedQuery(sched_task_t * __restrict task)
370: {
371: sched_queue_t *queue;
372: sched_task_t *t;
373:
374: if (!task || !TASK_ROOT(task))
375: return -1; /* error */
376:
377: switch (TASK_TYPE(task)) {
378: case taskREAD:
379: queue = &TASK_ROOT(task)->root_read;
380: break;
381: case taskWRITE:
382: queue = &TASK_ROOT(task)->root_write;
383: break;
384: case taskTIMER:
385: queue = &TASK_ROOT(task)->root_timer;
386: break;
387: case taskALARM:
388: queue = &TASK_ROOT(task)->root_alarm;
389: break;
390: case taskRTC:
391: queue = &TASK_ROOT(task)->root_rtc;
392: break;
393: case taskNODE:
394: queue = &TASK_ROOT(task)->root_node;
395: break;
396: case taskPROC:
397: queue = &TASK_ROOT(task)->root_proc;
398: break;
399: case taskSIGNAL:
400: queue = &TASK_ROOT(task)->root_signal;
401: break;
402: case taskAIO:
403: queue = &TASK_ROOT(task)->root_aio;
404: break;
405: case taskLIO:
406: queue = &TASK_ROOT(task)->root_lio;
407: break;
408: case taskUSER:
409: queue = &TASK_ROOT(task)->root_user;
410: break;
411: case taskEVENT:
412: queue = &TASK_ROOT(task)->root_event;
413: break;
414: case taskTASK:
415: queue = &TASK_ROOT(task)->root_task;
416: break;
417: case taskSUSPEND:
418: queue = &TASK_ROOT(task)->root_suspend;
419: break;
420: case taskREADY:
421: queue = &TASK_ROOT(task)->root_ready;
422: break;
423: case taskTHREAD:
424: queue = &TASK_ROOT(task)->root_thread;
425: break;
426: default:
427: return 1; /* not in queue */
428: }
429: if (queue)
430: TAILQ_FOREACH(t, queue, task_node)
431: if (TASK_ID(t) == TASK_ID(task))
432: return 0; /* found */
433:
434: return 1; /* not in queue */
435: }
436:
437: /*
438: * schedQueryby() - Query task in scheduler by criteria
439: *
440: * @root = root task
441: * @type = query from queue type, if =taskMAX query same task from all queues
442: * @criteria = find task by criteria
443: * [ CRITERIA_ANY|CRITERIA_CALL|CRITERIA_ARG|CRITERIA_FD|CRITERIA_VAL|
444: * CRITERIA_ID|CRITERIA_TS|CRITERIA_DATA ]
445: * @param = search parameter
446: * return: -1 error, 0 found or 1 not found
447: */
448: int
449: schedQueryby(sched_root_task_t * __restrict root, sched_task_type_t type,
450: u_char criteria, void *param)
451: {
452: sched_task_t *task;
453: sched_queue_t *queue;
454: register int flg = 0;
455:
456: if (!root)
457: return -1;
458: /* if type == taskMAX check in all queues */
459: if (type == taskMAX) {
460: if ((flg = schedQueryby(root, taskREAD, criteria, param)) < 1)
461: return flg;
462: if ((flg = schedQueryby(root, taskWRITE, criteria, param)) < 1)
463: return flg;
464: if ((flg = schedQueryby(root, taskTIMER, criteria, param)) < 1)
465: return flg;
466: if ((flg = schedQueryby(root, taskALARM, criteria, param)) < 1)
467: return flg;
468: if ((flg = schedQueryby(root, taskRTC, criteria, param)) < 1)
469: return flg;
470: if ((flg = schedQueryby(root, taskNODE, criteria, param)) < 1)
471: return flg;
472: if ((flg = schedQueryby(root, taskPROC, criteria, param)) < 1)
473: return flg;
474: if ((flg = schedQueryby(root, taskSIGNAL, criteria, param)) < 1)
475: return flg;
476: if ((flg = schedQueryby(root, taskAIO, criteria, param)) < 1)
477: return flg;
478: if ((flg = schedQueryby(root, taskLIO, criteria, param)) < 1)
479: return flg;
480: if ((flg = schedQueryby(root, taskUSER, criteria, param)) < 1)
481: return flg;
482: if ((flg = schedQueryby(root, taskEVENT, criteria, param)) < 1)
483: return flg;
484: if ((flg = schedQueryby(root, taskTASK, criteria, param)) < 1)
485: return flg;
486: if ((flg = schedQueryby(root, taskSUSPEND, criteria, param)) < 1)
487: return flg;
488: if ((flg = schedQueryby(root, taskREADY, criteria, param)) < 1)
489: return flg;
490: if ((flg = schedQueryby(root, taskTHREAD, criteria, param)) < 1)
491: return flg;
492: return 1; /* not found */
493: }
494: /* choosen queue */
495: switch (type) {
496: case taskREAD:
497: queue = &root->root_read;
498: break;
499: case taskWRITE:
500: queue = &root->root_write;
501: break;
502: case taskTIMER:
503: queue = &root->root_timer;
504: break;
505: case taskALARM:
506: queue = &root->root_alarm;
507: break;
508: case taskRTC:
509: queue = &root->root_rtc;
510: break;
511: case taskNODE:
512: queue = &root->root_node;
513: break;
514: case taskPROC:
515: queue = &root->root_proc;
516: break;
517: case taskSIGNAL:
518: queue = &root->root_signal;
519: break;
520: case taskAIO:
521: queue = &root->root_aio;
522: break;
523: case taskLIO:
524: queue = &root->root_lio;
525: break;
526: case taskUSER:
527: queue = &root->root_user;
528: break;
529: case taskEVENT:
530: queue = &root->root_event;
531: break;
532: case taskTASK:
533: queue = &root->root_task;
534: break;
535: case taskSUSPEND:
536: queue = &root->root_suspend;
537: break;
538: case taskREADY:
539: queue = &root->root_ready;
540: break;
541: case taskTHREAD:
542: queue = &root->root_thread;
543: break;
544: default:
545: return 1; /* not found */
546: }
547:
548: TAILQ_FOREACH(task, queue, task_node) {
549: switch (criteria) {
550: case CRITERIA_ANY:
551: return 0; /* found */
552: case CRITERIA_CALL:
553: if (TASK_FUNC(task) == (sched_task_func_t) param)
554: return 0; /* found */
555: break;
556: case CRITERIA_ARG:
557: if (TASK_ARG(task) == param)
558: return 0; /* found */
559: break;
560: case CRITERIA_FD:
561: if (TASK_FD(task) == (intptr_t) param)
562: return 0; /* found */
563: break;
564: case CRITERIA_ID:
565: case CRITERIA_VAL:
566: if (TASK_VAL(task) == (u_long) param)
567: return 0; /* found */
568: break;
569: case CRITERIA_TS:
570: if (!sched_timespeccmp(&TASK_TS(task),
571: (struct timespec*) param, -))
572: return 0; /* found */
573: break;
574: case CRITERIA_DATA:
575: if (TASK_DATA(task) == param)
576: return 0; /* found */
577: break;
578: default:
579: sched_SetErr(EINVAL, "Invalid parameter criteria %d",
580: criteria);
581: return 1; /* not found */
582: }
583: }
584:
585: return 1; /* not found */
586: }
587:
588: /*
589: * schedCancel() - Cancel task from scheduler
590: *
591: * @task = task
592: * return: -1 error or 0 ok
593: */
594: int
595: schedCancel(sched_task_t * __restrict task)
596: {
597: sched_queue_t *queue;
598:
599: if (!task || !TASK_ROOT(task))
600: return -1;
601:
602: if (TASK_ROOT(task)->root_hooks.hook_exec.cancel)
603: if (TASK_ROOT(task)->root_hooks.hook_exec.cancel(task, NULL))
604: return -1;
605:
606: switch (TASK_TYPE(task)) {
607: case taskREAD:
608: queue = &TASK_ROOT(task)->root_read;
609: break;
610: case taskWRITE:
611: queue = &TASK_ROOT(task)->root_write;
612: break;
613: case taskTIMER:
614: queue = &TASK_ROOT(task)->root_timer;
615: break;
616: case taskALARM:
617: queue = &TASK_ROOT(task)->root_alarm;
618: break;
619: case taskRTC:
620: queue = &TASK_ROOT(task)->root_rtc;
621: break;
622: case taskNODE:
623: queue = &TASK_ROOT(task)->root_node;
624: break;
625: case taskPROC:
626: queue = &TASK_ROOT(task)->root_proc;
627: break;
628: case taskSIGNAL:
629: queue = &TASK_ROOT(task)->root_signal;
630: break;
631: case taskAIO:
632: queue = &TASK_ROOT(task)->root_aio;
633: break;
634: case taskLIO:
635: queue = &TASK_ROOT(task)->root_lio;
636: break;
637: case taskUSER:
638: queue = &TASK_ROOT(task)->root_user;
639: break;
640: case taskEVENT:
641: queue = &TASK_ROOT(task)->root_event;
642: break;
643: case taskTASK:
644: queue = &TASK_ROOT(task)->root_task;
645: break;
646: case taskSUSPEND:
647: queue = &TASK_ROOT(task)->root_suspend;
648: break;
649: case taskREADY:
650: queue = &TASK_ROOT(task)->root_ready;
651: break;
652: case taskTHREAD:
653: queue = &TASK_ROOT(task)->root_thread;
654: break;
655: default:
656: queue = NULL;
657: }
658: if (queue) {
659: #ifdef HAVE_LIBPTHREAD
660: pthread_mutex_lock(&TASK_ROOT(task)->root_mtx[TASK_TYPE(task)]);
661: #endif
662: TAILQ_REMOVE(queue, TASK_ID(task), task_node);
663: #ifdef HAVE_LIBPTHREAD
664: pthread_mutex_unlock(&TASK_ROOT(task)->root_mtx[TASK_TYPE(task)]);
665: #endif
666: }
667: if (TASK_TYPE(task) != taskUNUSE)
668: sched_unuseTask(task);
669:
670: return 0;
671: }
672:
673: /*
674: * schedCancelby() - Cancel task from scheduler by criteria
675: *
676: * @root = root task
677: * @type = cancel from queue type, if =taskMAX cancel same task from all queues
678: * @criteria = find task by criteria
679: * [ CRITERIA_ANY|CRITERIA_CALL|CRITERIA_ARG|CRITERIA_FD|CRITERIA_VAL|
680: * CRITERIA_ID|CRITERIA_TS|CRITERIA_DATA ]
681: * @param = search parameter
682: * @hook = custom cleanup hook function, may be NULL
683: * return: -1 error, -2 error in sub-stage cancel execution, -3 error from custom hook or 0 ok
684: */
685: int
686: schedCancelby(sched_root_task_t * __restrict root, sched_task_type_t type,
687: u_char criteria, void *param, sched_hook_func_t hook)
688: {
689: sched_task_t *task, *tmp;
690: sched_queue_t *queue;
691: register int flg = 0;
692:
693: if (!root)
694: return -1;
695: /* if type == taskMAX check in all queues */
696: if (type == taskMAX) {
697: if (schedCancelby(root, taskREAD, criteria, param, hook))
698: return -2;
699: if (schedCancelby(root, taskWRITE, criteria, param, hook))
700: return -2;
701: if (schedCancelby(root, taskTIMER, criteria, param, hook))
702: return -2;
703: if (schedCancelby(root, taskALARM, criteria, param, hook))
704: return -2;
705: if (schedCancelby(root, taskRTC, criteria, param, hook))
706: return -2;
707: if (schedCancelby(root, taskNODE, criteria, param, hook))
708: return -2;
709: if (schedCancelby(root, taskPROC, criteria, param, hook))
710: return -2;
711: if (schedCancelby(root, taskSIGNAL, criteria, param, hook))
712: return -2;
713: if (schedCancelby(root, taskAIO, criteria, param, hook))
714: return -2;
715: if (schedCancelby(root, taskLIO, criteria, param, hook))
716: return -2;
717: if (schedCancelby(root, taskUSER, criteria, param, hook))
718: return -2;
719: if (schedCancelby(root, taskEVENT, criteria, param, hook))
720: return -2;
721: if (schedCancelby(root, taskTASK, criteria, param, hook))
722: return -2;
723: if (schedCancelby(root, taskSUSPEND, criteria, param, hook))
724: return -2;
725: if (schedCancelby(root, taskREADY, criteria, param, hook))
726: return -2;
727: if (schedCancelby(root, taskTHREAD, criteria, param, hook))
728: return -2;
729: return 0;
730: }
731: /* choosen queue */
732: switch (type) {
733: case taskREAD:
734: queue = &root->root_read;
735: break;
736: case taskWRITE:
737: queue = &root->root_write;
738: break;
739: case taskTIMER:
740: queue = &root->root_timer;
741: break;
742: case taskALARM:
743: queue = &root->root_alarm;
744: break;
745: case taskRTC:
746: queue = &root->root_rtc;
747: break;
748: case taskNODE:
749: queue = &root->root_node;
750: break;
751: case taskPROC:
752: queue = &root->root_proc;
753: break;
754: case taskSIGNAL:
755: queue = &root->root_signal;
756: break;
757: case taskAIO:
758: queue = &root->root_aio;
759: break;
760: case taskLIO:
761: queue = &root->root_lio;
762: break;
763: case taskUSER:
764: queue = &root->root_user;
765: break;
766: case taskEVENT:
767: queue = &root->root_event;
768: break;
769: case taskTASK:
770: queue = &root->root_task;
771: break;
772: case taskSUSPEND:
773: queue = &root->root_suspend;
774: break;
775: case taskREADY:
776: queue = &root->root_ready;
777: break;
778: case taskTHREAD:
779: queue = &root->root_thread;
780: break;
781: default:
782: return 0;
783: }
784:
785: #ifdef HAVE_LIBPTHREAD
786: pthread_mutex_lock(&root->root_mtx[type]);
787: #endif
788: TAILQ_FOREACH_SAFE(task, queue, task_node, tmp) {
789: flg ^= flg;
790: switch (criteria) {
791: case CRITERIA_ANY:
792: flg = 1;
793: break;
794: case CRITERIA_CALL:
795: if (TASK_FUNC(task) == (sched_task_func_t) param)
796: flg = 1;
797: break;
798: case CRITERIA_ARG:
799: if (TASK_ARG(task) == param)
800: flg = 1;
801: break;
802: case CRITERIA_FD:
803: if (TASK_FD(task) == (intptr_t) param)
804: flg = 1;
805: break;
806: case CRITERIA_ID:
807: case CRITERIA_VAL:
808: if (TASK_VAL(task) == (u_long) param)
809: flg = 1;
810: break;
811: case CRITERIA_TS:
812: if (!sched_timespeccmp(&TASK_TS(task), (struct timespec*) param, -))
813: flg = 1;
814: break;
815: case CRITERIA_DATA:
816: if (TASK_DATA(task) == param)
817: flg = 1;
818: break;
819: default:
820: sched_SetErr(EINVAL, "Invalid parameter criteria %d", criteria);
821: flg = -1;
822: }
823: if (flg < 0) /* error */
824: break;
825: /* cancel choosen task */
826: if (flg > 0) {
827: if (TASK_ROOT(task)->root_hooks.hook_exec.cancel)
828: if (TASK_ROOT(task)->root_hooks.hook_exec.cancel(task, NULL)) {
829: flg = -1;
830: break;
831: }
832: /* custom hook */
833: if (hook)
834: if (hook(task, NULL)) {
835: flg = -3;
836: break;
837: }
838:
839: TAILQ_REMOVE(queue, task, task_node);
840: if (TASK_TYPE(task) != taskUNUSE)
841: sched_unuseTask(task);
842:
843: flg ^= flg; /* ok */
844: }
845: }
846: #ifdef HAVE_LIBPTHREAD
847: pthread_mutex_unlock(&root->root_mtx[type]);
848: #endif
849: return flg;
850: }
851:
852: /*
853: * schedRun() - Scheduler *run loop*
854: *
855: * @root = root task
856: * @killState = kill condition variable, if !=0 stop scheduler loop
857: * return: -1 error or 0 ok
858: */
859: int
860: schedRun(sched_root_task_t *root, volatile intptr_t * __restrict killState)
861: {
862: sched_task_t *task;
863:
864: if (!root)
865: return -1;
866:
867: if (root->root_hooks.hook_exec.run)
868: if (root->root_hooks.hook_exec.run(root, NULL))
869: return -1;
870:
871: if (killState) {
872: if (root->root_hooks.hook_exec.condition)
873: /* condition scheduler loop */
874: while (root && root->root_hooks.hook_exec.fetch &&
875: root->root_hooks.hook_exec.condition &&
876: root->root_hooks.hook_exec.condition(root, (void*) killState)) {
877: if ((task = root->root_hooks.hook_exec.fetch(root, NULL)))
878: root->root_ret = schedCall(task);
879: }
880: else
881: /* trigger scheduler loop */
882: while (!*killState && root && root->root_hooks.hook_exec.fetch) {
883: if ((task = root->root_hooks.hook_exec.fetch(root, NULL)))
884: root->root_ret = schedCall(task);
885: }
886: } else
887: /* infinite scheduler loop */
888: while (root && root->root_hooks.hook_exec.fetch)
889: if ((task = root->root_hooks.hook_exec.fetch(root, NULL)))
890: root->root_ret = schedCall(task);
891:
892: return 0;
893: }
894:
895: /*
896: * schedPolling() - Polling timeout period if no timer task is present
897: *
898: * @root = root task
899: * @ts = timeout polling period, if ==NULL INFINIT timeout
900: * @tsold = old timeout polling if !=NULL
901: * return: -1 error or 0 ok
902: */
903: int
904: schedPolling(sched_root_task_t * __restrict root, struct timespec * __restrict ts,
905: struct timespec * __restrict tsold)
906: {
907: if (!root)
908: return -1;
909:
910: if (tsold)
911: *tsold = root->root_poll;
912:
913: if (!ts)
914: sched_timespecinf(&root->root_poll);
915: else
916: root->root_poll = *ts;
917:
918: return 0;
919: }
920:
921: /*
922: * schedTermCondition() - Activate hook for scheduler condition kill
923: *
924: * @root = root task
925: * @condValue = condition value, kill schedRun() if condValue == killState
926: * return: -1 error or 0 ok
927: */
928: int
929: schedTermCondition(sched_root_task_t * __restrict root, intptr_t condValue)
930: {
931: if (!root)
932: return -1;
933:
934: root->root_cond = condValue;
935: root->root_hooks.hook_exec.condition = sched_hook_condition;
936: return 0;
937: }
938:
939: /*
940: * schedResumeby() - Resume suspended task
941: *
942: * @root = root task
943: * @criteria = find task by criteria
944: * [CRITERIA_ANY|CRITERIA_ID|CRITERIA_DATA]
945: * @param = search parameter (sched_task_t *task| unsigned long id)
946: * return: -1 error or 0 resumed ok
947: */
948: int
949: schedResumeby(sched_root_task_t * __restrict root, u_char criteria, void *param)
950: {
951: sched_task_t *task, *tmp;
952: register int flg = 0;
953:
954: if (!root)
955: return -1;
956:
957: #ifdef HAVE_LIBPTHREAD
958: pthread_mutex_lock(&root->root_mtx[taskSUSPEND]);
959: #endif
960: TAILQ_FOREACH_SAFE(task, &root->root_suspend, task_node, tmp) {
961: flg ^= flg;
962: switch (criteria) {
963: case CRITERIA_ANY:
964: flg = 1;
965: break;
966: case CRITERIA_ID:
967: if (TASK_VAL(task) == (u_long) param)
968: flg = 1;
969: break;
970: case CRITERIA_DATA:
971: if (TASK_ID(task) == (sched_task_t*) param)
972: flg = 1;
973: break;
974: default:
975: sched_SetErr(EINVAL, "Invalid parameter criteria %d", criteria);
976: flg = -1;
977: }
978: if (flg < 0)
979: break;
980: /* resume choosen task */
981: if (flg > 0) {
982: if (root->root_hooks.hook_exec.resume)
983: if (root->root_hooks.hook_exec.resume(task, NULL)) {
984: flg = -1;
985: break;
986: }
987:
988: TAILQ_REMOVE(&root->root_suspend, task, task_node);
989:
990: task->task_type = taskREADY;
991: #ifdef HAVE_LIBPTHREAD
992: pthread_mutex_lock(&root->root_mtx[taskREADY]);
993: #endif
994: TAILQ_INSERT_TAIL(&root->root_ready, task, task_node);
995: #ifdef HAVE_LIBPTHREAD
996: pthread_mutex_unlock(&root->root_mtx[taskREADY]);
997: #endif
998:
999: flg ^= flg; /* ok */
1000: }
1001: }
1002: #ifdef HAVE_LIBPTHREAD
1003: pthread_mutex_unlock(&root->root_mtx[taskSUSPEND]);
1004: #endif
1005:
1006: return flg;
1007: }
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