Annotation of libaitsched/src/hooks.c, revision 1.13.2.2
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 $
1.13.2.2! misho 6: * $Id: hooks.c,v 1.13.2.1 2012/08/21 11:07:16 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:
1.5 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: /*
51: * sched_hook_init() - Default INIT hook
1.5 misho 52: *
1.1 misho 53: * @root = root task
1.6 misho 54: * @arg = unused
1.1 misho 55: * return: <0 errors and 0 ok
56: */
57: void *
1.6 misho 58: sched_hook_init(void *root, void *arg __unused)
1.1 misho 59: {
60: sched_root_task_t *r = root;
61:
1.6 misho 62: if (!r)
1.1 misho 63: return (void*) -1;
64:
65: r->root_kq = kqueue();
66: if (r->root_kq == -1) {
67: LOGERR;
68: return (void*) -1;
69: }
70:
71: return NULL;
72: }
73:
74: /*
75: * sched_hook_fini() - Default FINI hook
1.5 misho 76: *
1.1 misho 77: * @root = root task
78: * @arg = unused
79: * return: <0 errors and 0 ok
80: */
81: void *
82: sched_hook_fini(void *root, void *arg __unused)
83: {
84: sched_root_task_t *r = root;
85:
86: if (!r)
87: return (void*) -1;
88:
89: if (r->root_kq > 2) {
90: close(r->root_kq);
91: r->root_kq = 0;
92: }
93:
94: return NULL;
95: }
96:
97: /*
98: * sched_hook_cancel() - Default CANCEL hook
1.5 misho 99: *
1.1 misho 100: * @task = current task
101: * @arg = unused
102: * return: <0 errors and 0 ok
103: */
104: void *
105: sched_hook_cancel(void *task, void *arg __unused)
106: {
107: sched_task_t *t = task;
108: struct kevent chg[1];
1.2 misho 109: struct timespec timeout = { 0, 0 };
1.11 misho 110: #ifdef AIO_SUPPORT
111: struct aiocb *acb;
112: #ifdef EVFILT_LIO
113: struct aiocb **acbs;
114: register int i;
115: #endif /* EVFILT_LIO */
116: #endif /* AIO_SUPPORT */
1.1 misho 117:
1.6 misho 118: if (!t || !TASK_ROOT(t))
1.1 misho 119: return (void*) -1;
120:
1.4 misho 121: switch (TASK_TYPE(t)) {
1.1 misho 122: case taskREAD:
1.2 misho 123: #ifdef __NetBSD__
124: EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_DELETE, 0, 0, (intptr_t) TASK_FD(t));
125: #else
126: EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_DELETE, 0, 0, (void*) TASK_FD(t));
127: #endif
1.1 misho 128: break;
129: case taskWRITE:
1.2 misho 130: #ifdef __NetBSD__
131: EV_SET(&chg[0], TASK_FD(t), EVFILT_WRITE, EV_DELETE, 0, 0, (intptr_t) TASK_FD(t));
132: #else
133: EV_SET(&chg[0], TASK_FD(t), EVFILT_WRITE, EV_DELETE, 0, 0, (void*) TASK_FD(t));
134: #endif
1.1 misho 135: break;
1.7 misho 136: case taskALARM:
137: #ifdef __NetBSD__
138: EV_SET(&chg[0], (uintptr_t) TASK_DATA(t), EVFILT_TIMER, EV_DELETE,
139: 0, 0, (intptr_t) TASK_DATA(t));
140: #else
141: EV_SET(&chg[0], (uintptr_t) TASK_DATA(t), EVFILT_TIMER, EV_DELETE,
142: 0, 0, (void*) TASK_DATA(t));
143: #endif
1.8 misho 144: break;
145: case taskNODE:
146: #ifdef __NetBSD__
147: EV_SET(&chg[0], TASK_FD(t), EVFILT_VNODE, EV_DELETE, 0, 0, (intptr_t) TASK_FD(t));
148: #else
149: EV_SET(&chg[0], TASK_FD(t), EVFILT_VNODE, EV_DELETE, 0, 0, (void*) TASK_FD(t));
150: #endif
151: break;
152: case taskPROC:
153: #ifdef __NetBSD__
154: EV_SET(&chg[0], TASK_VAL(t), EVFILT_PROC, EV_DELETE, 0, 0, (intptr_t) TASK_VAL(t));
155: #else
156: EV_SET(&chg[0], TASK_VAL(t), EVFILT_PROC, EV_DELETE, 0, 0, (void*) TASK_VAL(t));
157: #endif
158: break;
159: case taskSIGNAL:
160: #ifdef __NetBSD__
161: EV_SET(&chg[0], TASK_VAL(t), EVFILT_SIGNAL, EV_DELETE, 0, 0, (intptr_t) TASK_VAL(t));
162: #else
163: EV_SET(&chg[0], TASK_VAL(t), EVFILT_SIGNAL, EV_DELETE, 0, 0, (void*) TASK_VAL(t));
164: #endif
165: break;
1.11 misho 166: #ifdef AIO_SUPPORT
167: case taskAIO:
168: #ifdef __NetBSD__
169: EV_SET(&chg[0], TASK_VAL(t), EVFILT_AIO, EV_DELETE, 0, 0, (intptr_t) TASK_VAL(t));
170: #else
171: EV_SET(&chg[0], TASK_VAL(t), EVFILT_AIO, EV_DELETE, 0, 0, (void*) TASK_VAL(t));
172: #endif
173: acb = (struct aiocb*) TASK_VAL(t);
174: if (acb) {
175: if (aio_cancel(acb->aio_fildes, acb) == AIO_CANCELED)
176: aio_return(acb);
177: free(acb);
178: TASK_VAL(t) = 0;
179: }
180: break;
181: #ifdef EVFILT_LIO
182: case taskLIO:
183: #ifdef __NetBSD__
184: EV_SET(&chg[0], TASK_VAL(t), EVFILT_LIO, EV_DELETE, 0, 0, (intptr_t) TASK_VAL(t));
185: #else
186: EV_SET(&chg[0], TASK_VAL(t), EVFILT_LIO, EV_DELETE, 0, 0, (void*) TASK_VAL(t));
187: #endif
188: acbs = (struct aiocb**) TASK_VAL(t);
189: if (acbs) {
190: for (i = 0; i < TASK_DATLEN(t); i++) {
191: if (aio_cancel(acbs[i]->aio_fildes, acbs[i]) == AIO_CANCELED)
192: aio_return(acbs[i]);
193: free(acbs[i]);
194: }
195: free(acbs);
196: TASK_VAL(t) = 0;
197: }
198: break;
199: #endif /* EVFILT_LIO */
200: #endif /* AIO_SUPPORT */
1.8 misho 201: #ifdef EVFILT_USER
202: case taskUSER:
203: #ifdef __NetBSD__
204: EV_SET(&chg[0], TASK_VAL(t), EVFILT_USER, EV_DELETE, 0, 0, (intptr_t) TASK_VAL(t));
205: #else
206: EV_SET(&chg[0], TASK_VAL(t), EVFILT_USER, EV_DELETE, 0, 0, (void*) TASK_VAL(t));
207: #endif
1.10 misho 208: break;
1.8 misho 209: #endif
1.13.2.1 misho 210: case taskTHREAD:
211: #ifdef HAVE_LIBPTHREAD
212: pthread_cancel((pthread_t) TASK_VAL(t));
213: #endif
1.1 misho 214: default:
1.8 misho 215: return NULL;
1.1 misho 216: }
217:
1.8 misho 218: kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout);
1.1 misho 219: return NULL;
220: }
221:
222: /*
223: * sched_hook_read() - Default READ hook
1.5 misho 224: *
1.1 misho 225: * @task = current task
226: * @arg = unused
227: * return: <0 errors and 0 ok
228: */
229: void *
230: sched_hook_read(void *task, void *arg __unused)
231: {
232: sched_task_t *t = task;
233: struct kevent chg[1];
1.2 misho 234: struct timespec timeout = { 0, 0 };
1.1 misho 235:
1.6 misho 236: if (!t || !TASK_ROOT(t))
1.1 misho 237: return (void*) -1;
238:
1.2 misho 239: #ifdef __NetBSD__
1.8 misho 240: EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, (intptr_t) TASK_FD(t));
1.2 misho 241: #else
1.8 misho 242: EV_SET(&chg[0], TASK_FD(t), EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, (void*) TASK_FD(t));
1.2 misho 243: #endif
1.4 misho 244: if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
245: if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
246: TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
1.3 misho 247: else
248: LOGERR;
1.1 misho 249: return (void*) -1;
250: }
251:
252: return NULL;
253: }
254:
255: /*
256: * sched_hook_write() - Default WRITE hook
1.5 misho 257: *
1.1 misho 258: * @task = current task
259: * @arg = unused
260: * return: <0 errors and 0 ok
261: */
262: void *
263: sched_hook_write(void *task, void *arg __unused)
264: {
265: sched_task_t *t = task;
266: struct kevent chg[1];
1.2 misho 267: struct timespec timeout = { 0, 0 };
1.1 misho 268:
1.6 misho 269: if (!t || !TASK_ROOT(t))
1.1 misho 270: return (void*) -1;
271:
1.2 misho 272: #ifdef __NetBSD__
1.8 misho 273: EV_SET(&chg[0], TASK_FD(t), EVFILT_WRITE, EV_ADD | EV_CLEAR, 0, 0, (intptr_t) TASK_FD(t));
1.2 misho 274: #else
1.8 misho 275: EV_SET(&chg[0], TASK_FD(t), EVFILT_WRITE, EV_ADD | EV_CLEAR, 0, 0, (void*) TASK_FD(t));
1.2 misho 276: #endif
1.4 misho 277: if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
278: if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
279: TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
1.3 misho 280: else
281: LOGERR;
1.1 misho 282: return (void*) -1;
283: }
284:
285: return NULL;
286: }
287:
288: /*
1.7 misho 289: * sched_hook_alarm() - Default ALARM hook
290: *
291: * @task = current task
292: * @arg = unused
293: * return: <0 errors and 0 ok
294: */
295: void *
296: sched_hook_alarm(void *task, void *arg __unused)
297: {
298: sched_task_t *t = task;
299: struct kevent chg[1];
300: struct timespec timeout = { 0, 0 };
301:
302: if (!t || !TASK_ROOT(t))
303: return (void*) -1;
304:
305: #ifdef __NetBSD__
306: EV_SET(&chg[0], (uintptr_t) TASK_DATA(t), EVFILT_TIMER, EV_ADD | EV_ONESHOT, 0,
307: t->task_val.ts.tv_sec * 1000 + t->task_val.ts.tv_nsec / 1000000,
308: (intptr_t) TASK_DATA(t));
309: #else
310: EV_SET(&chg[0], (uintptr_t) TASK_DATA(t), EVFILT_TIMER, EV_ADD | EV_ONESHOT, 0,
311: t->task_val.ts.tv_sec * 1000 + t->task_val.ts.tv_nsec / 1000000,
312: (void*) TASK_DATA(t));
313: #endif
314: if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
315: if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
316: TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
317: else
318: LOGERR;
319: return (void*) -1;
320: }
321:
322: return NULL;
323: }
324:
325: /*
1.8 misho 326: * sched_hook_node() - Default NODE hook
327: *
328: * @task = current task
329: * @arg = unused
330: * return: <0 errors and 0 ok
331: */
332: void *
333: sched_hook_node(void *task, void *arg __unused)
334: {
335: sched_task_t *t = task;
336: struct kevent chg[1];
337: struct timespec timeout = { 0, 0 };
338:
339: if (!t || !TASK_ROOT(t))
340: return (void*) -1;
341:
342: #ifdef __NetBSD__
343: EV_SET(&chg[0], TASK_FD(t), EVFILT_VNODE, EV_ADD | EV_CLEAR,
344: NOTE_DELETE | NOTE_WRITE | NOTE_EXTEND | NOTE_ATTRIB |
345: NOTE_LINK | NOTE_RENAME | NOTE_REVOKE, 0, (intptr_t) TASK_FD(t));
346: #else
347: EV_SET(&chg[0], TASK_FD(t), EVFILT_VNODE, EV_ADD | EV_CLEAR,
348: NOTE_DELETE | NOTE_WRITE | NOTE_EXTEND | NOTE_ATTRIB |
349: NOTE_LINK | NOTE_RENAME | NOTE_REVOKE, 0, (void*) TASK_FD(t));
350: #endif
351: if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
352: if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
353: TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
354: else
355: LOGERR;
356: return (void*) -1;
357: }
358:
359: return NULL;
360: }
361:
362: /*
363: * sched_hook_proc() - Default PROC hook
364: *
365: * @task = current task
366: * @arg = unused
367: * return: <0 errors and 0 ok
368: */
369: void *
370: sched_hook_proc(void *task, void *arg __unused)
371: {
372: sched_task_t *t = task;
373: struct kevent chg[1];
374: struct timespec timeout = { 0, 0 };
375:
376: if (!t || !TASK_ROOT(t))
377: return (void*) -1;
378:
379: #ifdef __NetBSD__
380: EV_SET(&chg[0], TASK_VAL(t), EVFILT_PROC, EV_ADD | EV_CLEAR,
381: NOTE_EXIT | NOTE_FORK | NOTE_EXEC | NOTE_TRACK, 0, (intptr_t) TASK_VAL(t));
382: #else
383: EV_SET(&chg[0], TASK_VAL(t), EVFILT_PROC, EV_ADD | EV_CLEAR,
384: NOTE_EXIT | NOTE_FORK | NOTE_EXEC | NOTE_TRACK, 0, (void*) TASK_VAL(t));
385: #endif
386: if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
387: if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
388: TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
389: else
390: LOGERR;
391: return (void*) -1;
392: }
393:
394: return NULL;
395: }
396:
397: /*
398: * sched_hook_signal() - Default SIGNAL hook
399: *
400: * @task = current task
401: * @arg = unused
402: * return: <0 errors and 0 ok
403: */
404: void *
405: sched_hook_signal(void *task, void *arg __unused)
406: {
407: sched_task_t *t = task;
408: struct kevent chg[1];
409: struct timespec timeout = { 0, 0 };
410:
411: if (!t || !TASK_ROOT(t))
412: return (void*) -1;
413:
414: #ifdef __NetBSD__
415: EV_SET(&chg[0], TASK_VAL(t), EVFILT_SIGNAL, EV_ADD, 0, 0, (intptr_t) TASK_VAL(t));
416: #else
417: EV_SET(&chg[0], TASK_VAL(t), EVFILT_SIGNAL, EV_ADD, 0, 0, (void*) TASK_VAL(t));
418: #endif
419: if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
420: if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
421: TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
422: else
423: LOGERR;
424: return (void*) -1;
425: }
426:
427: return NULL;
428: }
429:
430: /*
431: * sched_hook_user() - Default USER hook
432: *
433: * @task = current task
434: * @arg = unused
435: * return: <0 errors and 0 ok
436: */
437: #ifdef EVFILT_USER
438: void *
439: sched_hook_user(void *task, void *arg __unused)
440: {
441: sched_task_t *t = task;
442: struct kevent chg[1];
443: struct timespec timeout = { 0, 0 };
444:
445: if (!t || !TASK_ROOT(t))
446: return (void*) -1;
447:
448: #ifdef __NetBSD__
449: EV_SET(&chg[0], TASK_VAL(t), EVFILT_USER, EV_ADD | EV_CLEAR, TASK_DATLEN(t),
450: 0, (intptr_t) TASK_VAL(t));
451: #else
452: EV_SET(&chg[0], TASK_VAL(t), EVFILT_USER, EV_ADD | EV_CLEAR, TASK_DATLEN(t),
453: 0, (void*) TASK_VAL(t));
454: #endif
455: if (kevent(TASK_ROOT(t)->root_kq, chg, 1, NULL, 0, &timeout) == -1) {
456: if (TASK_ROOT(t)->root_hooks.hook_exec.exception)
457: TASK_ROOT(t)->root_hooks.hook_exec.exception(TASK_ROOT(t), NULL);
458: else
459: LOGERR;
460: return (void*) -1;
461: }
462:
463: return NULL;
464: }
465: #endif
466:
467: /*
1.1 misho 468: * sched_hook_fetch() - Default FETCH hook
1.5 misho 469: *
1.1 misho 470: * @root = root task
471: * @arg = unused
472: * return: NULL error or !=NULL fetched task
473: */
474: void *
475: sched_hook_fetch(void *root, void *arg __unused)
476: {
477: sched_root_task_t *r = root;
1.6 misho 478: sched_task_t *task, *tmp;
1.4 misho 479: struct timespec now, m, mtmp;
480: struct timespec *timeout;
1.1 misho 481: struct kevent evt[1], res[KQ_EVENTS];
1.9 misho 482: register int i, flg;
1.1 misho 483: int en;
1.11 misho 484: #ifdef AIO_SUPPORT
485: int len, fd;
486: struct aiocb *acb;
487: #ifdef EVFILT_LIO
488: int l;
489: register int j;
490: off_t off;
491: struct aiocb **acbs;
492: struct iovec *iv;
493: #endif /* EVFILT_LIO */
494: #endif /* AIO_SUPPORT */
1.1 misho 495:
1.6 misho 496: if (!r)
1.1 misho 497: return NULL;
498:
499: /* get new task by queue priority */
500: while ((task = TAILQ_FIRST(&r->root_event))) {
1.4 misho 501: #ifdef HAVE_LIBPTHREAD
502: pthread_mutex_lock(&r->root_mtx[taskEVENT]);
503: #endif
1.1 misho 504: TAILQ_REMOVE(&r->root_event, task, task_node);
1.4 misho 505: #ifdef HAVE_LIBPTHREAD
506: pthread_mutex_unlock(&r->root_mtx[taskEVENT]);
507: #endif
1.1 misho 508: task->task_type = taskUNUSE;
1.4 misho 509: #ifdef HAVE_LIBPTHREAD
510: pthread_mutex_lock(&r->root_mtx[taskUNUSE]);
511: #endif
1.1 misho 512: TAILQ_INSERT_TAIL(&r->root_unuse, task, task_node);
1.4 misho 513: #ifdef HAVE_LIBPTHREAD
514: pthread_mutex_unlock(&r->root_mtx[taskUNUSE]);
515: #endif
1.1 misho 516: return task;
517: }
518: while ((task = TAILQ_FIRST(&r->root_ready))) {
1.4 misho 519: #ifdef HAVE_LIBPTHREAD
520: pthread_mutex_lock(&r->root_mtx[taskREADY]);
521: #endif
1.1 misho 522: TAILQ_REMOVE(&r->root_ready, task, task_node);
1.4 misho 523: #ifdef HAVE_LIBPTHREAD
524: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
525: #endif
1.1 misho 526: task->task_type = taskUNUSE;
1.4 misho 527: #ifdef HAVE_LIBPTHREAD
528: pthread_mutex_lock(&r->root_mtx[taskUNUSE]);
529: #endif
1.1 misho 530: TAILQ_INSERT_TAIL(&r->root_unuse, task, task_node);
1.4 misho 531: #ifdef HAVE_LIBPTHREAD
532: pthread_mutex_unlock(&r->root_mtx[taskUNUSE]);
533: #endif
1.1 misho 534: return task;
535: }
536:
537: #ifdef TIMER_WITHOUT_SORT
1.4 misho 538: clock_gettime(CLOCK_MONOTONIC, &now);
1.1 misho 539:
1.4 misho 540: sched_timespecclear(&r->root_wait);
1.1 misho 541: TAILQ_FOREACH(task, &r->root_timer, task_node) {
1.4 misho 542: if (!sched_timespecisset(&r->root_wait))
543: r->root_wait = TASK_TS(task);
544: else if (sched_timespeccmp(&TASK_TS(task), &r->root_wait, -) < 0)
545: r->root_wait = TASK_TS(task);
1.1 misho 546: }
547:
548: if (TAILQ_FIRST(&r->root_timer)) {
549: m = r->root_wait;
1.4 misho 550: sched_timespecsub(&m, &now, &mtmp);
1.1 misho 551: r->root_wait = mtmp;
552: } else {
553: /* set wait INFTIM */
1.4 misho 554: sched_timespecinf(&r->root_wait);
1.1 misho 555: }
556: #else
1.12 misho 557: if (!TAILQ_FIRST(&r->root_task) && (task = TAILQ_FIRST(&r->root_timer))) {
1.4 misho 558: clock_gettime(CLOCK_MONOTONIC, &now);
1.1 misho 559:
1.4 misho 560: m = TASK_TS(task);
561: sched_timespecsub(&m, &now, &mtmp);
1.1 misho 562: r->root_wait = mtmp;
563: } else {
564: /* set wait INFTIM */
1.4 misho 565: sched_timespecinf(&r->root_wait);
1.1 misho 566: }
567: #endif
1.12 misho 568: /* if present member of task, set NOWAIT */
569: if (TAILQ_FIRST(&r->root_task))
1.4 misho 570: sched_timespecclear(&r->root_wait);
1.1 misho 571:
1.4 misho 572: if (r->root_wait.tv_sec != -1 && r->root_wait.tv_nsec != -1)
573: timeout = &r->root_wait;
574: else if (sched_timespecisinf(&r->root_poll))
1.1 misho 575: timeout = NULL;
1.4 misho 576: else
577: timeout = &r->root_poll;
1.1 misho 578: if ((en = kevent(r->root_kq, NULL, 0, res, KQ_EVENTS, timeout)) == -1) {
1.3 misho 579: if (r->root_hooks.hook_exec.exception) {
580: if (r->root_hooks.hook_exec.exception(r, NULL))
581: return NULL;
1.6 misho 582: } else if (errno != EINTR)
1.3 misho 583: LOGERR;
1.2 misho 584: return NULL;
1.1 misho 585: }
586:
1.4 misho 587: now.tv_sec = now.tv_nsec = 0;
1.1 misho 588: /* Go and catch the cat into pipes ... */
589: for (i = 0; i < en; i++) {
590: memcpy(evt, &res[i], sizeof evt);
591: evt->flags = EV_DELETE;
592: /* Put read/write task to ready queue */
593: switch (res[i].filter) {
594: case EVFILT_READ:
1.9 misho 595: flg = 0;
1.6 misho 596: TAILQ_FOREACH_SAFE(task, &r->root_read, task_node, tmp) {
1.3 misho 597: if (TASK_FD(task) != ((intptr_t) res[i].udata))
1.1 misho 598: continue;
1.13.2.2! misho 599: else {
1.9 misho 600: flg++;
1.13.2.2! misho 601: TASK_RET(task) = res[i].data;
! 602: TASK_FLAG(task) = res[i].fflags;
! 603: }
1.1 misho 604: /* remove read handle */
1.4 misho 605: #ifdef HAVE_LIBPTHREAD
606: pthread_mutex_lock(&r->root_mtx[taskREAD]);
607: #endif
1.1 misho 608: TAILQ_REMOVE(&r->root_read, task, task_node);
1.4 misho 609: #ifdef HAVE_LIBPTHREAD
610: pthread_mutex_unlock(&r->root_mtx[taskREAD]);
611: #endif
1.3 misho 612: if (r->root_hooks.hook_exec.exception && res[i].flags & EV_EOF) {
613: if (r->root_hooks.hook_exec.exception(r, (void*) EV_EOF)) {
614: task->task_type = taskUNUSE;
1.4 misho 615: #ifdef HAVE_LIBPTHREAD
616: pthread_mutex_lock(&r->root_mtx[taskUNUSE]);
617: #endif
1.3 misho 618: TAILQ_INSERT_TAIL(&r->root_unuse, task, task_node);
1.4 misho 619: #ifdef HAVE_LIBPTHREAD
620: pthread_mutex_unlock(&r->root_mtx[taskUNUSE]);
621: #endif
1.3 misho 622: } else {
623: task->task_type = taskREADY;
1.4 misho 624: #ifdef HAVE_LIBPTHREAD
625: pthread_mutex_lock(&r->root_mtx[taskREADY]);
626: #endif
1.3 misho 627: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
1.4 misho 628: #ifdef HAVE_LIBPTHREAD
629: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
630: #endif
1.3 misho 631: }
632: } else {
1.2 misho 633: task->task_type = taskREADY;
1.4 misho 634: #ifdef HAVE_LIBPTHREAD
635: pthread_mutex_lock(&r->root_mtx[taskREADY]);
636: #endif
1.2 misho 637: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
1.4 misho 638: #ifdef HAVE_LIBPTHREAD
639: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
640: #endif
1.3 misho 641: }
1.1 misho 642: }
1.9 misho 643: /* if match at least 2, don't remove resouce of event */
644: if (flg > 1)
645: evt->flags ^= evt->flags;
1.1 misho 646: break;
647: case EVFILT_WRITE:
1.9 misho 648: flg = 0;
1.6 misho 649: TAILQ_FOREACH_SAFE(task, &r->root_write, task_node, tmp) {
1.3 misho 650: if (TASK_FD(task) != ((intptr_t) res[i].udata))
1.1 misho 651: continue;
1.13.2.2! misho 652: else {
1.9 misho 653: flg++;
1.13.2.2! misho 654: TASK_RET(task) = res[i].data;
! 655: TASK_FLAG(task) = res[i].fflags;
! 656: }
1.1 misho 657: /* remove write handle */
1.4 misho 658: #ifdef HAVE_LIBPTHREAD
659: pthread_mutex_lock(&r->root_mtx[taskWRITE]);
660: #endif
1.1 misho 661: TAILQ_REMOVE(&r->root_write, task, task_node);
1.4 misho 662: #ifdef HAVE_LIBPTHREAD
663: pthread_mutex_unlock(&r->root_mtx[taskWRITE]);
664: #endif
1.3 misho 665: if (r->root_hooks.hook_exec.exception && res[i].flags & EV_EOF) {
666: if (r->root_hooks.hook_exec.exception(r, (void*) EV_EOF)) {
667: task->task_type = taskUNUSE;
1.4 misho 668: #ifdef HAVE_LIBPTHREAD
669: pthread_mutex_lock(&r->root_mtx[taskUNUSE]);
670: #endif
1.3 misho 671: TAILQ_INSERT_TAIL(&r->root_unuse, task, task_node);
1.4 misho 672: #ifdef HAVE_LIBPTHREAD
673: pthread_mutex_unlock(&r->root_mtx[taskUNUSE]);
674: #endif
1.3 misho 675: } else {
676: task->task_type = taskREADY;
1.4 misho 677: #ifdef HAVE_LIBPTHREAD
678: pthread_mutex_lock(&r->root_mtx[taskREADY]);
679: #endif
1.3 misho 680: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
1.4 misho 681: #ifdef HAVE_LIBPTHREAD
682: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
683: #endif
1.3 misho 684: }
685: } else {
1.2 misho 686: task->task_type = taskREADY;
1.4 misho 687: #ifdef HAVE_LIBPTHREAD
688: pthread_mutex_lock(&r->root_mtx[taskREADY]);
689: #endif
1.2 misho 690: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
1.4 misho 691: #ifdef HAVE_LIBPTHREAD
692: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
693: #endif
1.3 misho 694: }
1.1 misho 695: }
1.9 misho 696: /* if match at least 2, don't remove resouce of event */
697: if (flg > 1)
698: evt->flags ^= evt->flags;
1.1 misho 699: break;
1.7 misho 700: case EVFILT_TIMER:
1.9 misho 701: flg = 0;
1.7 misho 702: TAILQ_FOREACH_SAFE(task, &r->root_alarm, task_node, tmp) {
703: if ((uintptr_t) TASK_DATA(task) != ((uintptr_t) res[i].udata))
704: continue;
1.13.2.2! misho 705: else {
1.9 misho 706: flg++;
1.13.2.2! misho 707: TASK_RET(task) = res[i].data;
! 708: TASK_FLAG(task) = res[i].fflags;
! 709: }
1.7 misho 710: /* remove alarm handle */
711: #ifdef HAVE_LIBPTHREAD
712: pthread_mutex_lock(&r->root_mtx[taskALARM]);
713: #endif
714: TAILQ_REMOVE(&r->root_alarm, task, task_node);
715: #ifdef HAVE_LIBPTHREAD
716: pthread_mutex_unlock(&r->root_mtx[taskALARM]);
717: #endif
718: task->task_type = taskREADY;
719: #ifdef HAVE_LIBPTHREAD
720: pthread_mutex_lock(&r->root_mtx[taskREADY]);
721: #endif
722: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
723: #ifdef HAVE_LIBPTHREAD
724: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
725: #endif
726: }
1.9 misho 727: /* if match at least 2, don't remove resouce of event */
728: if (flg > 1)
729: evt->flags ^= evt->flags;
1.7 misho 730: break;
1.8 misho 731: case EVFILT_VNODE:
1.9 misho 732: flg = 0;
1.8 misho 733: TAILQ_FOREACH_SAFE(task, &r->root_node, task_node, tmp) {
734: if (TASK_FD(task) != ((intptr_t) res[i].udata))
735: continue;
736: else {
1.9 misho 737: flg++;
1.13.2.2! misho 738: TASK_RET(task) = res[i].data;
! 739: TASK_FLAG(task) = res[i].fflags;
1.8 misho 740: }
741: /* remove node handle */
742: #ifdef HAVE_LIBPTHREAD
743: pthread_mutex_lock(&r->root_mtx[taskNODE]);
744: #endif
745: TAILQ_REMOVE(&r->root_node, task, task_node);
746: #ifdef HAVE_LIBPTHREAD
747: pthread_mutex_unlock(&r->root_mtx[taskNODE]);
748: #endif
749: task->task_type = taskREADY;
750: #ifdef HAVE_LIBPTHREAD
751: pthread_mutex_lock(&r->root_mtx[taskREADY]);
752: #endif
753: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
754: #ifdef HAVE_LIBPTHREAD
755: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
756: #endif
757: }
1.9 misho 758: /* if match at least 2, don't remove resouce of event */
759: if (flg > 1)
760: evt->flags ^= evt->flags;
1.8 misho 761: break;
762: case EVFILT_PROC:
1.9 misho 763: flg = 0;
1.8 misho 764: TAILQ_FOREACH_SAFE(task, &r->root_proc, task_node, tmp) {
765: if (TASK_VAL(task) != ((uintptr_t) res[i].udata))
766: continue;
767: else {
1.9 misho 768: flg++;
1.13.2.2! misho 769: TASK_RET(task) = res[i].data;
! 770: TASK_FLAG(task) = res[i].fflags;
1.8 misho 771: }
772: /* remove proc handle */
773: #ifdef HAVE_LIBPTHREAD
774: pthread_mutex_lock(&r->root_mtx[taskPROC]);
775: #endif
776: TAILQ_REMOVE(&r->root_proc, task, task_node);
777: #ifdef HAVE_LIBPTHREAD
778: pthread_mutex_unlock(&r->root_mtx[taskPROC]);
779: #endif
780: task->task_type = taskREADY;
781: #ifdef HAVE_LIBPTHREAD
782: pthread_mutex_lock(&r->root_mtx[taskREADY]);
783: #endif
784: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
785: #ifdef HAVE_LIBPTHREAD
786: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
787: #endif
788: }
1.9 misho 789: /* if match at least 2, don't remove resouce of event */
790: if (flg > 1)
791: evt->flags ^= evt->flags;
1.8 misho 792: break;
793: case EVFILT_SIGNAL:
1.9 misho 794: flg = 0;
1.8 misho 795: TAILQ_FOREACH_SAFE(task, &r->root_signal, task_node, tmp) {
796: if (TASK_VAL(task) != ((uintptr_t) res[i].udata))
797: continue;
1.13.2.2! misho 798: else {
1.9 misho 799: flg++;
1.13.2.2! misho 800: TASK_RET(task) = res[i].data;
! 801: TASK_FLAG(task) = res[i].fflags;
! 802: }
1.8 misho 803: /* remove signal handle */
804: #ifdef HAVE_LIBPTHREAD
805: pthread_mutex_lock(&r->root_mtx[taskSIGNAL]);
806: #endif
807: TAILQ_REMOVE(&r->root_signal, task, task_node);
808: #ifdef HAVE_LIBPTHREAD
809: pthread_mutex_unlock(&r->root_mtx[taskSIGNAL]);
810: #endif
811: task->task_type = taskREADY;
812: #ifdef HAVE_LIBPTHREAD
813: pthread_mutex_lock(&r->root_mtx[taskREADY]);
814: #endif
815: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
816: #ifdef HAVE_LIBPTHREAD
817: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
818: #endif
819: }
1.9 misho 820: /* if match at least 2, don't remove resouce of event */
821: if (flg > 1)
822: evt->flags ^= evt->flags;
1.8 misho 823: break;
1.11 misho 824: #ifdef AIO_SUPPORT
825: case EVFILT_AIO:
826: flg = 0;
827: TAILQ_FOREACH_SAFE(task, &r->root_aio, task_node, tmp) {
828: acb = (struct aiocb*) TASK_VAL(task);
829: if (acb != ((struct aiocb*) res[i].udata))
830: continue;
1.13.2.2! misho 831: else {
1.11 misho 832: flg++;
1.13.2.2! misho 833: TASK_RET(task) = res[i].data;
! 834: TASK_FLAG(task) = res[i].fflags;
! 835: }
1.11 misho 836: /* remove user handle */
837: #ifdef HAVE_LIBPTHREAD
838: pthread_mutex_lock(&r->root_mtx[taskAIO]);
839: #endif
840: TAILQ_REMOVE(&r->root_aio, task, task_node);
841: #ifdef HAVE_LIBPTHREAD
842: pthread_mutex_unlock(&r->root_mtx[taskAIO]);
843: #endif
844: task->task_type = taskREADY;
845: #ifdef HAVE_LIBPTHREAD
846: pthread_mutex_lock(&r->root_mtx[taskREADY]);
847: #endif
848: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
849: #ifdef HAVE_LIBPTHREAD
850: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
851: #endif
852: fd = acb->aio_fildes;
853: if ((len = aio_return(acb)) != -1) {
854: if (lseek(fd, acb->aio_offset + len, SEEK_CUR) == -1)
855: LOGERR;
856: } else
857: LOGERR;
858: free(acb);
859: TASK_DATLEN(task) = (u_long) len;
860: TASK_FD(task) = fd;
861: }
862: /* if match at least 2, don't remove resouce of event */
863: if (flg > 1)
864: evt->flags ^= evt->flags;
865: break;
866: #ifdef EVFILT_LIO
867: case EVFILT_LIO:
868: flg = 0;
869: TAILQ_FOREACH_SAFE(task, &r->root_lio, task_node, tmp) {
870: acbs = (struct aiocb**) TASK_VAL(task);
871: if (acbs != ((struct aiocb**) res[i].udata))
872: continue;
1.13.2.2! misho 873: else {
1.11 misho 874: flg++;
1.13.2.2! misho 875: TASK_RET(task) = res[i].data;
! 876: TASK_FLAG(task) = res[i].fflags;
! 877: }
1.11 misho 878: /* remove user handle */
879: #ifdef HAVE_LIBPTHREAD
880: pthread_mutex_lock(&r->root_mtx[taskLIO]);
881: #endif
882: TAILQ_REMOVE(&r->root_lio, task, task_node);
883: #ifdef HAVE_LIBPTHREAD
884: pthread_mutex_unlock(&r->root_mtx[taskLIO]);
885: #endif
886: task->task_type = taskREADY;
887: #ifdef HAVE_LIBPTHREAD
888: pthread_mutex_lock(&r->root_mtx[taskREADY]);
889: #endif
890: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
891: #ifdef HAVE_LIBPTHREAD
892: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
893: #endif
894: iv = (struct iovec*) TASK_DATA(task);
895: fd = acbs[0]->aio_fildes;
896: off = acbs[0]->aio_offset;
897: for (j = len = 0; i < TASK_DATLEN(task); len += l, i++) {
898: if ((iv[i].iov_len = aio_return(acbs[i])) == -1)
899: l = 0;
900: else
901: l = iv[i].iov_len;
902: free(acbs[i]);
903: }
904: free(acbs);
905: TASK_DATLEN(task) = (u_long) len;
906: TASK_FD(task) = fd;
907:
908: if (lseek(fd, off + len, SEEK_CUR) == -1)
909: LOGERR;
910: }
911: /* if match at least 2, don't remove resouce of event */
912: if (flg > 1)
913: evt->flags ^= evt->flags;
914: break;
915: #endif /* EVFILT_LIO */
916: #endif /* AIO_SUPPORT */
1.8 misho 917: #ifdef EVFILT_USER
918: case EVFILT_USER:
1.9 misho 919: flg = 0;
1.8 misho 920: TAILQ_FOREACH_SAFE(task, &r->root_user, task_node, tmp) {
921: if (TASK_VAL(task) != ((uintptr_t) res[i].udata))
922: continue;
923: else {
1.9 misho 924: flg++;
1.13.2.2! misho 925: TASK_RET(task) = res[i].data;
! 926: TASK_FLAG(task) = res[i].fflags;
1.8 misho 927: }
928: /* remove user handle */
929: #ifdef HAVE_LIBPTHREAD
930: pthread_mutex_lock(&r->root_mtx[taskUSER]);
931: #endif
932: TAILQ_REMOVE(&r->root_user, task, task_node);
933: #ifdef HAVE_LIBPTHREAD
934: pthread_mutex_unlock(&r->root_mtx[taskUSER]);
935: #endif
936: task->task_type = taskREADY;
937: #ifdef HAVE_LIBPTHREAD
938: pthread_mutex_lock(&r->root_mtx[taskREADY]);
939: #endif
940: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
941: #ifdef HAVE_LIBPTHREAD
942: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
943: #endif
944: }
1.9 misho 945: /* if match at least 2, don't remove resouce of event */
946: if (flg > 1)
947: evt->flags ^= evt->flags;
1.8 misho 948: break;
1.11 misho 949: #endif /* EVFILT_USER */
1.1 misho 950: }
1.4 misho 951: if (kevent(r->root_kq, evt, 1, NULL, 0, &now) == -1) {
1.3 misho 952: if (r->root_hooks.hook_exec.exception) {
953: if (r->root_hooks.hook_exec.exception(r, NULL))
954: return NULL;
955: } else
956: LOGERR;
957: }
1.1 misho 958: }
959:
1.2 misho 960: /* timer update & put in ready queue */
1.4 misho 961: clock_gettime(CLOCK_MONOTONIC, &now);
1.1 misho 962:
1.6 misho 963: TAILQ_FOREACH_SAFE(task, &r->root_timer, task_node, tmp)
1.4 misho 964: if (sched_timespeccmp(&now, &TASK_TS(task), -) >= 0) {
965: #ifdef HAVE_LIBPTHREAD
966: pthread_mutex_lock(&r->root_mtx[taskTIMER]);
967: #endif
1.1 misho 968: TAILQ_REMOVE(&r->root_timer, task, task_node);
1.4 misho 969: #ifdef HAVE_LIBPTHREAD
970: pthread_mutex_unlock(&r->root_mtx[taskTIMER]);
971: #endif
1.1 misho 972: task->task_type = taskREADY;
1.4 misho 973: #ifdef HAVE_LIBPTHREAD
974: pthread_mutex_lock(&r->root_mtx[taskREADY]);
975: #endif
1.1 misho 976: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
1.4 misho 977: #ifdef HAVE_LIBPTHREAD
978: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
979: #endif
1.1 misho 980: }
981:
1.12 misho 982: /* put regular task priority task to ready queue,
1.13 misho 983: if there is no ready task or reach max missing hit for regular task */
1.12 misho 984: if ((task = TAILQ_FIRST(&r->root_task))) {
1.13 misho 985: if (!TAILQ_FIRST(&r->root_ready) || r->root_miss >= TASK_VAL(task)) {
986: r->root_miss ^= r->root_miss;
1.1 misho 987:
1.4 misho 988: #ifdef HAVE_LIBPTHREAD
1.12 misho 989: pthread_mutex_lock(&r->root_mtx[taskTASK]);
1.4 misho 990: #endif
1.12 misho 991: TAILQ_REMOVE(&r->root_task, task, task_node);
1.4 misho 992: #ifdef HAVE_LIBPTHREAD
1.12 misho 993: pthread_mutex_unlock(&r->root_mtx[taskTASK]);
1.4 misho 994: #endif
1.1 misho 995: task->task_type = taskREADY;
1.4 misho 996: #ifdef HAVE_LIBPTHREAD
997: pthread_mutex_lock(&r->root_mtx[taskREADY]);
998: #endif
1.1 misho 999: TAILQ_INSERT_TAIL(&r->root_ready, task, task_node);
1.4 misho 1000: #ifdef HAVE_LIBPTHREAD
1001: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
1002: #endif
1.1 misho 1003: } else
1.13 misho 1004: r->root_miss++;
1.1 misho 1005: } else
1.13 misho 1006: r->root_miss ^= r->root_miss;
1.1 misho 1007:
1008: /* OK, lets get ready task !!! */
1.6 misho 1009: task = TAILQ_FIRST(&r->root_ready);
1010: if (!(task))
1011: return NULL;
1012:
1.4 misho 1013: #ifdef HAVE_LIBPTHREAD
1014: pthread_mutex_lock(&r->root_mtx[taskREADY]);
1015: #endif
1.1 misho 1016: TAILQ_REMOVE(&r->root_ready, task, task_node);
1.4 misho 1017: #ifdef HAVE_LIBPTHREAD
1018: pthread_mutex_unlock(&r->root_mtx[taskREADY]);
1019: #endif
1.1 misho 1020: task->task_type = taskUNUSE;
1.4 misho 1021: #ifdef HAVE_LIBPTHREAD
1022: pthread_mutex_lock(&r->root_mtx[taskUNUSE]);
1023: #endif
1.1 misho 1024: TAILQ_INSERT_TAIL(&r->root_unuse, task, task_node);
1.4 misho 1025: #ifdef HAVE_LIBPTHREAD
1026: pthread_mutex_unlock(&r->root_mtx[taskUNUSE]);
1027: #endif
1.1 misho 1028: return task;
1029: }
1.3 misho 1030:
1031: /*
1032: * sched_hook_exception() - Default EXCEPTION hook
1.5 misho 1033: *
1.3 misho 1034: * @root = root task
1035: * @arg = custom handling: if arg == EV_EOF or other value; default: arg == NULL log errno
1036: * return: <0 errors and 0 ok
1037: */
1038: void *
1039: sched_hook_exception(void *root, void *arg)
1040: {
1041: sched_root_task_t *r = root;
1042:
1.6 misho 1043: if (!r)
1.3 misho 1044: return NULL;
1045:
1046: /* custom exception handling ... */
1047: if (arg) {
1048: if (arg == (void*) EV_EOF)
1049: return NULL;
1050: return (void*) -1; /* raise scheduler error!!! */
1051: }
1052:
1053: /* if error hook exists */
1054: if (r->root_hooks.hook_root.error)
1055: return (r->root_hooks.hook_root.error(root, (void*) ((intptr_t) errno)));
1056:
1057: /* default case! */
1058: LOGERR;
1059: return NULL;
1060: }
1.5 misho 1061:
1062: /*
1063: * sched_hook_condition() - Default CONDITION hook
1064: *
1065: * @root = root task
1066: * @arg = killState from schedRun()
1067: * return: NULL kill scheduler loop or !=NULL ok
1068: */
1069: void *
1070: sched_hook_condition(void *root, void *arg)
1071: {
1072: sched_root_task_t *r = root;
1073:
1.6 misho 1074: if (!r)
1.5 misho 1075: return NULL;
1076:
1077: return (void*) (r->root_cond - *(intptr_t*) arg);
1078: }
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