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: tasks.c,v 1.12 2012/08/08 08:25:39 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
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:
48:
49: #pragma GCC visibility push(hidden)
50:
51: inline sched_task_t *
52: _sched_useTask(sched_root_task_t * __restrict root)
53: {
54: sched_task_t *task, *tmp;
55:
56: TAILQ_FOREACH_SAFE(task, &root->root_unuse, task_node, tmp) {
57: if (!TASK_ISLOCKED(task)) {
58: #ifdef HAVE_LIBPTHREAD
59: pthread_mutex_lock(&root->root_mtx[taskUNUSE]);
60: #endif
61: TAILQ_REMOVE(&root->root_unuse, task, task_node);
62: #ifdef HAVE_LIBPTHREAD
63: pthread_mutex_unlock(&root->root_mtx[taskUNUSE]);
64: #endif
65: break;
66: }
67: }
68:
69: if (!task) {
70: task = malloc(sizeof(sched_task_t));
71: if (!task) {
72: LOGERR;
73: return NULL;
74: }
75: }
76:
77: memset(task, 0, sizeof(sched_task_t));
78: task->task_id = (uintptr_t) task;
79: return task;
80: }
81:
82: inline sched_task_t *
83: _sched_unuseTask(sched_task_t * __restrict task)
84: {
85: TASK_UNLOCK(task);
86: TASK_TYPE(task) = taskUNUSE;
87: #ifdef HAVE_LIBPTHREAD
88: pthread_mutex_lock(&TASK_ROOT(task)->root_mtx[taskUNUSE]);
89: #endif
90: TAILQ_INSERT_TAIL(&TASK_ROOT(task)->root_unuse, TASK_ID(task), task_node);
91: #ifdef HAVE_LIBPTHREAD
92: pthread_mutex_unlock(&TASK_ROOT(task)->root_mtx[taskUNUSE]);
93: #endif
94: task = NULL;
95:
96: return task;
97: }
98:
99: #pragma GCC visibility pop
100:
101:
102: /*
103: * schedRead() - Add READ I/O task to scheduler queue
104: *
105: * @root = root task
106: * @func = task execution function
107: * @arg = 1st func argument
108: * @fd = fd handle
109: * @opt_data = Optional data
110: * @opt_dlen = Optional data length
111: * return: NULL error or !=NULL new queued task
112: */
113: sched_task_t *
114: schedRead(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd,
115: void *opt_data, size_t opt_dlen)
116: {
117: sched_task_t *task;
118: void *ptr;
119:
120: if (!root || !func)
121: return NULL;
122:
123: /* get new task */
124: if (!(task = _sched_useTask(root)))
125: return NULL;
126:
127: task->task_func = func;
128: TASK_TYPE(task) = taskREAD;
129: TASK_ROOT(task) = root;
130:
131: TASK_ARG(task) = arg;
132: TASK_FD(task) = fd;
133:
134: TASK_DATA(task) = opt_data;
135: TASK_DATLEN(task) = opt_dlen;
136:
137: if (root->root_hooks.hook_add.read)
138: ptr = root->root_hooks.hook_add.read(task, NULL);
139: else
140: ptr = NULL;
141:
142: if (!ptr) {
143: #ifdef HAVE_LIBPTHREAD
144: pthread_mutex_lock(&root->root_mtx[taskREAD]);
145: #endif
146: TAILQ_INSERT_TAIL(&root->root_read, TASK_ID(task), task_node);
147: #ifdef HAVE_LIBPTHREAD
148: pthread_mutex_unlock(&root->root_mtx[taskREAD]);
149: #endif
150: } else
151: task = _sched_unuseTask(task);
152:
153: return task;
154: }
155:
156: /*
157: * schedWrite() - Add WRITE I/O task to scheduler queue
158: *
159: * @root = root task
160: * @func = task execution function
161: * @arg = 1st func argument
162: * @fd = fd handle
163: * @opt_data = Optional data
164: * @opt_dlen = Optional data length
165: * return: NULL error or !=NULL new queued task
166: */
167: sched_task_t *
168: schedWrite(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd,
169: void *opt_data, size_t opt_dlen)
170: {
171: sched_task_t *task;
172: void *ptr;
173:
174: if (!root || !func)
175: return NULL;
176:
177: /* get new task */
178: if (!(task = _sched_useTask(root)))
179: return NULL;
180:
181: task->task_func = func;
182: TASK_TYPE(task) = taskWRITE;
183: TASK_ROOT(task) = root;
184:
185: TASK_ARG(task) = arg;
186: TASK_FD(task) = fd;
187:
188: TASK_DATA(task) = opt_data;
189: TASK_DATLEN(task) = opt_dlen;
190:
191: if (root->root_hooks.hook_add.write)
192: ptr = root->root_hooks.hook_add.write(task, NULL);
193: else
194: ptr = NULL;
195:
196: if (!ptr) {
197: #ifdef HAVE_LIBPTHREAD
198: pthread_mutex_lock(&root->root_mtx[taskWRITE]);
199: #endif
200: TAILQ_INSERT_TAIL(&root->root_write, TASK_ID(task), task_node);
201: #ifdef HAVE_LIBPTHREAD
202: pthread_mutex_unlock(&root->root_mtx[taskWRITE]);
203: #endif
204: } else
205: task = _sched_unuseTask(task);
206:
207: return task;
208: }
209:
210: /*
211: * schedNode() - Add NODE task to scheduler queue
212: *
213: * @root = root task
214: * @func = task execution function
215: * @arg = 1st func argument
216: * @fd = fd handle
217: * @opt_data = Optional data
218: * @opt_dlen = Optional data length
219: * return: NULL error or !=NULL new queued task
220: */
221: sched_task_t *
222: schedNode(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd,
223: void *opt_data, size_t opt_dlen)
224: {
225: sched_task_t *task;
226: void *ptr;
227:
228: if (!root || !func)
229: return NULL;
230:
231: /* get new task */
232: if (!(task = _sched_useTask(root)))
233: return NULL;
234:
235: task->task_func = func;
236: TASK_TYPE(task) = taskNODE;
237: TASK_ROOT(task) = root;
238:
239: TASK_ARG(task) = arg;
240: TASK_FD(task) = fd;
241:
242: TASK_DATA(task) = opt_data;
243: TASK_DATLEN(task) = opt_dlen;
244:
245: if (root->root_hooks.hook_add.node)
246: ptr = root->root_hooks.hook_add.node(task, NULL);
247: else
248: ptr = NULL;
249:
250: if (!ptr) {
251: #ifdef HAVE_LIBPTHREAD
252: pthread_mutex_lock(&root->root_mtx[taskNODE]);
253: #endif
254: TAILQ_INSERT_TAIL(&root->root_node, TASK_ID(task), task_node);
255: #ifdef HAVE_LIBPTHREAD
256: pthread_mutex_unlock(&root->root_mtx[taskNODE]);
257: #endif
258: } else
259: task = _sched_unuseTask(task);
260:
261: return task;
262: }
263:
264: /*
265: * schedProc() - Add PROC task to scheduler queue
266: *
267: * @root = root task
268: * @func = task execution function
269: * @arg = 1st func argument
270: * @pid = PID
271: * @opt_data = Optional data
272: * @opt_dlen = Optional data length
273: * return: NULL error or !=NULL new queued task
274: */
275: sched_task_t *
276: schedProc(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long pid,
277: void *opt_data, size_t opt_dlen)
278: {
279: sched_task_t *task;
280: void *ptr;
281:
282: if (!root || !func)
283: return NULL;
284:
285: /* get new task */
286: if (!(task = _sched_useTask(root)))
287: return NULL;
288:
289: task->task_func = func;
290: TASK_TYPE(task) = taskPROC;
291: TASK_ROOT(task) = root;
292:
293: TASK_ARG(task) = arg;
294: TASK_VAL(task) = pid;
295:
296: TASK_DATA(task) = opt_data;
297: TASK_DATLEN(task) = opt_dlen;
298:
299: if (root->root_hooks.hook_add.proc)
300: ptr = root->root_hooks.hook_add.proc(task, NULL);
301: else
302: ptr = NULL;
303:
304: if (!ptr) {
305: #ifdef HAVE_LIBPTHREAD
306: pthread_mutex_lock(&root->root_mtx[taskPROC]);
307: #endif
308: TAILQ_INSERT_TAIL(&root->root_proc, TASK_ID(task), task_node);
309: #ifdef HAVE_LIBPTHREAD
310: pthread_mutex_unlock(&root->root_mtx[taskPROC]);
311: #endif
312: } else
313: task = _sched_unuseTask(task);
314:
315: return task;
316: }
317:
318: /*
319: * schedUser() - Add trigger USER task to scheduler queue
320: *
321: * @root = root task
322: * @func = task execution function
323: * @arg = 1st func argument
324: * @id = Trigger ID
325: * @opt_data = Optional data
326: * @opt_dlen = Optional user's trigger flags
327: * return: NULL error or !=NULL new queued task
328: */
329: sched_task_t *
330: schedUser(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long id,
331: void *opt_data, size_t opt_dlen)
332: {
333: #ifndef EVFILT_USER
334: sched_SetErr(ENOTSUP, "Not supported kevent() filter");
335: return NULL;
336: #else
337: sched_task_t *task;
338: void *ptr;
339:
340: if (!root || !func)
341: return NULL;
342:
343: /* get new task */
344: if (!(task = _sched_useTask(root)))
345: return NULL;
346:
347: task->task_func = func;
348: TASK_TYPE(task) = taskUSER;
349: TASK_ROOT(task) = root;
350:
351: TASK_ARG(task) = arg;
352: TASK_VAL(task) = id;
353:
354: TASK_DATA(task) = opt_data;
355: TASK_DATLEN(task) = opt_dlen;
356:
357: if (root->root_hooks.hook_add.user)
358: ptr = root->root_hooks.hook_add.user(task, NULL);
359: else
360: ptr = NULL;
361:
362: if (!ptr) {
363: #ifdef HAVE_LIBPTHREAD
364: pthread_mutex_lock(&root->root_mtx[taskUSER]);
365: #endif
366: TAILQ_INSERT_TAIL(&root->root_user, TASK_ID(task), task_node);
367: #ifdef HAVE_LIBPTHREAD
368: pthread_mutex_unlock(&root->root_mtx[taskUSER]);
369: #endif
370: } else
371: task = _sched_unuseTask(task);
372:
373: return task;
374: #endif
375: }
376:
377: /*
378: * schedSignal() - Add SIGNAL task to scheduler queue
379: *
380: * @root = root task
381: * @func = task execution function
382: * @arg = 1st func argument
383: * @sig = Signal
384: * @opt_data = Optional data
385: * @opt_dlen = Optional data length
386: * return: NULL error or !=NULL new queued task
387: */
388: sched_task_t *
389: schedSignal(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long sig,
390: void *opt_data, size_t opt_dlen)
391: {
392: sched_task_t *task;
393: void *ptr;
394:
395: if (!root || !func)
396: return NULL;
397:
398: /* get new task */
399: if (!(task = _sched_useTask(root)))
400: return NULL;
401:
402: task->task_func = func;
403: TASK_TYPE(task) = taskSIGNAL;
404: TASK_ROOT(task) = root;
405:
406: TASK_ARG(task) = arg;
407: TASK_VAL(task) = sig;
408:
409: TASK_DATA(task) = opt_data;
410: TASK_DATLEN(task) = opt_dlen;
411:
412: if (root->root_hooks.hook_add.signal)
413: ptr = root->root_hooks.hook_add.signal(task, NULL);
414: else
415: ptr = NULL;
416:
417: if (!ptr) {
418: #ifdef HAVE_LIBPTHREAD
419: pthread_mutex_lock(&root->root_mtx[taskSIGNAL]);
420: #endif
421: TAILQ_INSERT_TAIL(&root->root_signal, TASK_ID(task), task_node);
422: #ifdef HAVE_LIBPTHREAD
423: pthread_mutex_unlock(&root->root_mtx[taskSIGNAL]);
424: #endif
425: } else
426: task = _sched_unuseTask(task);
427:
428: return task;
429: }
430:
431: /*
432: * schedAlarm() - Add ALARM task to scheduler queue
433: *
434: * @root = root task
435: * @func = task execution function
436: * @arg = 1st func argument
437: * @ts = timeout argument structure, minimum alarm timer resolution is 1msec!
438: * @opt_data = Optional data
439: * @opt_dlen = Optional data length
440: * return: NULL error or !=NULL new queued task
441: */
442: sched_task_t *
443: schedAlarm(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, struct timespec ts,
444: void *opt_data, size_t opt_dlen)
445: {
446: sched_task_t *task;
447: void *ptr;
448:
449: if (!root || !func)
450: return NULL;
451:
452: /* get new task */
453: if (!(task = _sched_useTask(root)))
454: return NULL;
455:
456: task->task_func = func;
457: TASK_TYPE(task) = taskALARM;
458: TASK_ROOT(task) = root;
459:
460: TASK_ARG(task) = arg;
461: TASK_TS(task) = ts;
462:
463: TASK_DATA(task) = opt_data;
464: TASK_DATLEN(task) = opt_dlen;
465:
466: if (root->root_hooks.hook_add.alarm)
467: ptr = root->root_hooks.hook_add.alarm(task, NULL);
468: else
469: ptr = NULL;
470:
471: if (!ptr) {
472: #ifdef HAVE_LIBPTHREAD
473: pthread_mutex_lock(&root->root_mtx[taskALARM]);
474: #endif
475: TAILQ_INSERT_TAIL(&root->root_alarm, TASK_ID(task), task_node);
476: #ifdef HAVE_LIBPTHREAD
477: pthread_mutex_unlock(&root->root_mtx[taskALARM]);
478: #endif
479: } else
480: task = _sched_unuseTask(task);
481:
482: return task;
483: }
484:
485: #ifdef AIO_SUPPORT
486: /*
487: * schedAIO() - Add AIO task to scheduler queue
488: *
489: * @root = root task
490: * @func = task execution function
491: * @arg = 1st func argument
492: * @acb = AIO cb structure address
493: * @opt_data = Optional data
494: * @opt_dlen = Optional data length
495: * return: NULL error or !=NULL new queued task
496: */
497: sched_task_t *
498: schedAIO(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg,
499: struct aiocb * __restrict acb, void *opt_data, size_t opt_dlen)
500: {
501: sched_task_t *task;
502: void *ptr;
503:
504: if (!root || !func || !acb || !opt_dlen)
505: return NULL;
506:
507: /* get new task */
508: if (!(task = _sched_useTask(root)))
509: return NULL;
510:
511: task->task_func = func;
512: TASK_TYPE(task) = taskAIO;
513: TASK_ROOT(task) = root;
514:
515: TASK_ARG(task) = arg;
516: TASK_VAL(task) = (u_long) acb;
517:
518: TASK_DATA(task) = opt_data;
519: TASK_DATLEN(task) = opt_dlen;
520:
521: if (root->root_hooks.hook_add.aio)
522: ptr = root->root_hooks.hook_add.aio(task, NULL);
523: else
524: ptr = NULL;
525:
526: if (!ptr) {
527: #ifdef HAVE_LIBPTHREAD
528: pthread_mutex_lock(&root->root_mtx[taskAIO]);
529: #endif
530: TAILQ_INSERT_TAIL(&root->root_aio, TASK_ID(task), task_node);
531: #ifdef HAVE_LIBPTHREAD
532: pthread_mutex_unlock(&root->root_mtx[taskAIO]);
533: #endif
534: } else
535: task = _sched_unuseTask(task);
536:
537: return task;
538: }
539:
540: /*
541: * schedAIORead() - Add AIO read task to scheduler queue
542: *
543: * @root = root task
544: * @func = task execution function
545: * @arg = 1st func argument
546: * @fd = file descriptor
547: * @buffer = Buffer
548: * @buflen = Buffer length
549: * @offset = Offset from start of file, if =-1 from current position
550: * return: NULL error or !=NULL new queued task
551: */
552: inline sched_task_t *
553: schedAIORead(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd,
554: void *buffer, size_t buflen, off_t offset)
555: {
556: struct aiocb *acb;
557: off_t off;
558:
559: if (!root || !func || !buffer || !buflen)
560: return NULL;
561:
562: if (offset == (off_t) -1) {
563: off = lseek(fd, 0, SEEK_CUR);
564: if (off == -1) {
565: LOGERR;
566: return NULL;
567: }
568: } else
569: off = offset;
570:
571: if (!(acb = malloc(sizeof(struct aiocb)))) {
572: LOGERR;
573: return NULL;
574: } else
575: memset(acb, 0, sizeof(struct aiocb));
576:
577: acb->aio_fildes = fd;
578: acb->aio_nbytes = buflen;
579: acb->aio_buf = buffer;
580: acb->aio_offset = off;
581: acb->aio_sigevent.sigev_notify = SIGEV_KEVENT;
582: acb->aio_sigevent.sigev_notify_kqueue = root->root_kq;
583: acb->aio_sigevent.sigev_value.sival_ptr = acb;
584:
585: if (aio_read(acb)) {
586: LOGERR;
587: free(acb);
588: return NULL;
589: }
590:
591: return schedAIO(root, func, arg, acb, buffer, buflen);
592: }
593:
594: /*
595: * schedAIOWrite() - Add AIO write task to scheduler queue
596: *
597: * @root = root task
598: * @func = task execution function
599: * @arg = 1st func argument
600: * @fd = file descriptor
601: * @buffer = Buffer
602: * @buflen = Buffer length
603: * @offset = Offset from start of file, if =-1 from current position
604: * return: NULL error or !=NULL new queued task
605: */
606: inline sched_task_t *
607: schedAIOWrite(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd,
608: void *buffer, size_t buflen, off_t offset)
609: {
610: struct aiocb *acb;
611: off_t off;
612:
613: if (!root || !func || !buffer || !buflen)
614: return NULL;
615:
616: if (offset == (off_t) -1) {
617: off = lseek(fd, 0, SEEK_CUR);
618: if (off == -1) {
619: LOGERR;
620: return NULL;
621: }
622: } else
623: off = offset;
624:
625: if (!(acb = malloc(sizeof(struct aiocb)))) {
626: LOGERR;
627: return NULL;
628: } else
629: memset(acb, 0, sizeof(struct aiocb));
630:
631: acb->aio_fildes = fd;
632: acb->aio_nbytes = buflen;
633: acb->aio_buf = buffer;
634: acb->aio_offset = off;
635: acb->aio_sigevent.sigev_notify = SIGEV_KEVENT;
636: acb->aio_sigevent.sigev_notify_kqueue = root->root_kq;
637: acb->aio_sigevent.sigev_value.sival_ptr = acb;
638:
639: if (aio_write(acb)) {
640: LOGERR;
641: free(acb);
642: return NULL;
643: }
644:
645: return schedAIO(root, func, arg, acb, buffer, buflen);
646: }
647:
648: #ifdef EVFILT_LIO
649: /*
650: * schedLIO() - Add AIO bulk tasks to scheduler queue
651: *
652: * @root = root task
653: * @func = task execution function
654: * @arg = 1st func argument
655: * @acbs = AIO cb structure addresses
656: * @opt_data = Optional data
657: * @opt_dlen = Optional data length
658: * return: NULL error or !=NULL new queued task
659: */
660: sched_task_t *
661: schedLIO(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg,
662: struct aiocb ** __restrict acbs, void *opt_data, size_t opt_dlen)
663: {
664: sched_task_t *task;
665: void *ptr;
666:
667: if (!root || !func || !acbs || !opt_dlen)
668: return NULL;
669:
670: /* get new task */
671: if (!(task = _sched_useTask(root)))
672: return NULL;
673:
674: task->task_func = func;
675: TASK_TYPE(task) = taskLIO;
676: TASK_ROOT(task) = root;
677:
678: TASK_ARG(task) = arg;
679: TASK_VAL(task) = (u_long) acbs;
680:
681: TASK_DATA(task) = opt_data;
682: TASK_DATLEN(task) = opt_dlen;
683:
684: if (root->root_hooks.hook_add.lio)
685: ptr = root->root_hooks.hook_add.lio(task, NULL);
686: else
687: ptr = NULL;
688:
689: if (!ptr) {
690: #ifdef HAVE_LIBPTHREAD
691: pthread_mutex_lock(&root->root_mtx[taskLIO]);
692: #endif
693: TAILQ_INSERT_TAIL(&root->root_lio, TASK_ID(task), task_node);
694: #ifdef HAVE_LIBPTHREAD
695: pthread_mutex_unlock(&root->root_mtx[taskLIO]);
696: #endif
697: } else
698: task = _sched_unuseTask(task);
699:
700: return task;
701: }
702:
703: /*
704: * schedLIORead() - Add list of AIO read tasks to scheduler queue
705: *
706: * @root = root task
707: * @func = task execution function
708: * @arg = 1st func argument
709: * @fd = file descriptor
710: * @bufs = Buffer's list
711: * @nbufs = Number of Buffers
712: * @offset = Offset from start of file, if =-1 from current position
713: * return: NULL error or !=NULL new queued task
714: */
715: sched_task_t *
716: schedLIORead(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd,
717: struct iovec *bufs, size_t nbufs, off_t offset)
718: {
719: struct sigevent sig;
720: struct aiocb **acb;
721: off_t off;
722: register int i;
723:
724: if (!root || !func || !bufs || !nbufs)
725: return NULL;
726:
727: if (offset == (off_t) -1) {
728: off = lseek(fd, 0, SEEK_CUR);
729: if (off == -1) {
730: LOGERR;
731: return NULL;
732: }
733: } else
734: off = offset;
735:
736: if (!(acb = calloc(sizeof(void*), nbufs))) {
737: LOGERR;
738: return NULL;
739: } else
740: memset(acb, 0, sizeof(void*) * nbufs);
741: for (i = 0; i < nbufs; off += bufs[i++].iov_len) {
742: acb[i] = malloc(sizeof(struct aiocb));
743: if (!acb[i]) {
744: LOGERR;
745: for (i = 0; i < nbufs; i++)
746: if (acb[i])
747: free(acb[i]);
748: free(acb);
749: return NULL;
750: } else
751: memset(acb[i], 0, sizeof(struct aiocb));
752: acb[i]->aio_fildes = fd;
753: acb[i]->aio_nbytes = bufs[i].iov_len;
754: acb[i]->aio_buf = bufs[i].iov_base;
755: acb[i]->aio_offset = off;
756: acb[i]->aio_lio_opcode = LIO_READ;
757: }
758: memset(&sig, 0, sizeof sig);
759: sig.sigev_notify = SIGEV_KEVENT;
760: sig.sigev_notify_kqueue = root->root_kq;
761: sig.sigev_value.sival_ptr = acb;
762:
763: if (lio_listio(LIO_NOWAIT, acb, nbufs, &sig)) {
764: LOGERR;
765: for (i = 0; i < nbufs; i++)
766: if (acb[i])
767: free(acb[i]);
768: free(acb);
769: return NULL;
770: }
771:
772: return schedLIO(root, func, arg, (void*) acb, bufs, nbufs);
773: }
774:
775: /*
776: * schedLIOWrite() - Add list of AIO write tasks to scheduler queue
777: *
778: * @root = root task
779: * @func = task execution function
780: * @arg = 1st func argument
781: * @fd = file descriptor
782: * @bufs = Buffer's list
783: * @nbufs = Number of Buffers
784: * @offset = Offset from start of file, if =-1 from current position
785: * return: NULL error or !=NULL new queued task
786: */
787: inline sched_task_t *
788: schedLIOWrite(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd,
789: struct iovec *bufs, size_t nbufs, off_t offset)
790: {
791: struct sigevent sig;
792: struct aiocb **acb;
793: off_t off;
794: register int i;
795:
796: if (!root || !func || !bufs || !nbufs)
797: return NULL;
798:
799: if (offset == (off_t) -1) {
800: off = lseek(fd, 0, SEEK_CUR);
801: if (off == -1) {
802: LOGERR;
803: return NULL;
804: }
805: } else
806: off = offset;
807:
808: if (!(acb = calloc(sizeof(void*), nbufs))) {
809: LOGERR;
810: return NULL;
811: } else
812: memset(acb, 0, sizeof(void*) * nbufs);
813: for (i = 0; i < nbufs; off += bufs[i++].iov_len) {
814: acb[i] = malloc(sizeof(struct aiocb));
815: if (!acb[i]) {
816: LOGERR;
817: for (i = 0; i < nbufs; i++)
818: if (acb[i])
819: free(acb[i]);
820: free(acb);
821: return NULL;
822: } else
823: memset(acb[i], 0, sizeof(struct aiocb));
824: acb[i]->aio_fildes = fd;
825: acb[i]->aio_nbytes = bufs[i].iov_len;
826: acb[i]->aio_buf = bufs[i].iov_base;
827: acb[i]->aio_offset = off;
828: acb[i]->aio_lio_opcode = LIO_WRITE;
829: }
830: memset(&sig, 0, sizeof sig);
831: sig.sigev_notify = SIGEV_KEVENT;
832: sig.sigev_notify_kqueue = root->root_kq;
833: sig.sigev_value.sival_ptr = acb;
834:
835: if (lio_listio(LIO_NOWAIT, acb, nbufs, &sig)) {
836: LOGERR;
837: for (i = 0; i < nbufs; i++)
838: if (acb[i])
839: free(acb[i]);
840: free(acb);
841: return NULL;
842: }
843:
844: return schedLIO(root, func, arg, (void*) acb, bufs, nbufs);
845: }
846: #endif /* EVFILT_LIO */
847: #endif /* AIO_SUPPORT */
848:
849: /*
850: * schedTimer() - Add TIMER task to scheduler queue
851: *
852: * @root = root task
853: * @func = task execution function
854: * @arg = 1st func argument
855: * @ts = timeout argument structure
856: * @opt_data = Optional data
857: * @opt_dlen = Optional data length
858: * return: NULL error or !=NULL new queued task
859: */
860: sched_task_t *
861: schedTimer(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, struct timespec ts,
862: void *opt_data, size_t opt_dlen)
863: {
864: sched_task_t *task, *tmp, *t = NULL;
865: void *ptr;
866: struct timespec now;
867:
868: if (!root || !func)
869: return NULL;
870:
871: /* get new task */
872: if (!(task = _sched_useTask(root)))
873: return NULL;
874:
875: task->task_func = func;
876: TASK_TYPE(task) = taskTIMER;
877: TASK_ROOT(task) = root;
878:
879: TASK_ARG(task) = arg;
880:
881: TASK_DATA(task) = opt_data;
882: TASK_DATLEN(task) = opt_dlen;
883:
884: /* calculate timeval structure */
885: clock_gettime(CLOCK_MONOTONIC, &now);
886: now.tv_sec += ts.tv_sec;
887: now.tv_nsec += ts.tv_nsec;
888: if (now.tv_nsec >= 1000000000L) {
889: now.tv_sec++;
890: now.tv_nsec -= 1000000000L;
891: } else if (now.tv_nsec < 0) {
892: now.tv_sec--;
893: now.tv_nsec += 1000000000L;
894: }
895: TASK_TS(task) = now;
896:
897: if (root->root_hooks.hook_add.timer)
898: ptr = root->root_hooks.hook_add.timer(task, NULL);
899: else
900: ptr = NULL;
901:
902: if (!ptr) {
903: #ifdef HAVE_LIBPTHREAD
904: pthread_mutex_lock(&root->root_mtx[taskTIMER]);
905: #endif
906: #ifdef TIMER_WITHOUT_SORT
907: TAILQ_INSERT_TAIL(&root->root_timer, TASK_ID(task), task_node);
908: #else
909: TAILQ_FOREACH_SAFE(t, &root->root_timer, task_node, tmp)
910: if (sched_timespeccmp(&TASK_TS(task), &TASK_TS(t), -) < 1)
911: break;
912: if (!t)
913: TAILQ_INSERT_TAIL(&root->root_timer, TASK_ID(task), task_node);
914: else
915: TAILQ_INSERT_BEFORE(t, TASK_ID(task), task_node);
916: #endif
917: #ifdef HAVE_LIBPTHREAD
918: pthread_mutex_unlock(&root->root_mtx[taskTIMER]);
919: #endif
920: } else
921: task = _sched_unuseTask(task);
922:
923: return task;
924: }
925:
926: /*
927: * schedEvent() - Add EVENT task to scheduler queue
928: *
929: * @root = root task
930: * @func = task execution function
931: * @arg = 1st func argument
932: * @val = additional func argument
933: * @opt_data = Optional data
934: * @opt_dlen = Optional data length
935: * return: NULL error or !=NULL new queued task
936: */
937: sched_task_t *
938: schedEvent(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long val,
939: void *opt_data, size_t opt_dlen)
940: {
941: sched_task_t *task;
942: void *ptr;
943:
944: if (!root || !func)
945: return NULL;
946:
947: /* get new task */
948: if (!(task = _sched_useTask(root)))
949: return NULL;
950:
951: task->task_func = func;
952: TASK_TYPE(task) = taskEVENT;
953: TASK_ROOT(task) = root;
954:
955: TASK_ARG(task) = arg;
956: TASK_VAL(task) = val;
957:
958: TASK_DATA(task) = opt_data;
959: TASK_DATLEN(task) = opt_dlen;
960:
961: if (root->root_hooks.hook_add.event)
962: ptr = root->root_hooks.hook_add.event(task, NULL);
963: else
964: ptr = NULL;
965:
966: if (!ptr) {
967: #ifdef HAVE_LIBPTHREAD
968: pthread_mutex_lock(&root->root_mtx[taskEVENT]);
969: #endif
970: TAILQ_INSERT_TAIL(&root->root_event, TASK_ID(task), task_node);
971: #ifdef HAVE_LIBPTHREAD
972: pthread_mutex_unlock(&root->root_mtx[taskEVENT]);
973: #endif
974: } else
975: task = _sched_unuseTask(task);
976:
977: return task;
978: }
979:
980:
981: /*
982: * schedTask() - Add regular task to scheduler queue
983: *
984: * @root = root task
985: * @func = task execution function
986: * @arg = 1st func argument
987: * @prio = regular task priority, 0 is hi priority for regular tasks
988: * @opt_data = Optional data
989: * @opt_dlen = Optional data length
990: * return: NULL error or !=NULL new queued task
991: */
992: sched_task_t *
993: schedTask(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long prio,
994: void *opt_data, size_t opt_dlen)
995: {
996: sched_task_t *task, *tmp, *t = NULL;
997: void *ptr;
998:
999: if (!root || !func)
1000: return NULL;
1001:
1002: /* get new task */
1003: if (!(task = _sched_useTask(root)))
1004: return NULL;
1005:
1006: task->task_func = func;
1007: TASK_TYPE(task) = taskTASK;
1008: TASK_ROOT(task) = root;
1009:
1010: TASK_ARG(task) = arg;
1011: TASK_VAL(task) = prio;
1012:
1013: TASK_DATA(task) = opt_data;
1014: TASK_DATLEN(task) = opt_dlen;
1015:
1016: if (root->root_hooks.hook_add.task)
1017: ptr = root->root_hooks.hook_add.task(task, NULL);
1018: else
1019: ptr = NULL;
1020:
1021: if (!ptr) {
1022: #ifdef HAVE_LIBPTHREAD
1023: pthread_mutex_lock(&root->root_mtx[taskTASK]);
1024: #endif
1025: TAILQ_FOREACH_SAFE(t, &root->root_task, task_node, tmp)
1026: if (TASK_VAL(task) < TASK_VAL(t))
1027: break;
1028: if (!t)
1029: TAILQ_INSERT_TAIL(&root->root_task, TASK_ID(task), task_node);
1030: else
1031: TAILQ_INSERT_BEFORE(t, TASK_ID(task), task_node);
1032: #ifdef HAVE_LIBPTHREAD
1033: pthread_mutex_unlock(&root->root_mtx[taskTASK]);
1034: #endif
1035: } else
1036: task = _sched_unuseTask(task);
1037:
1038: return task;
1039: }
1040:
1041: /*
1042: * schedSuspend() - Add Suspended task to scheduler queue
1043: *
1044: * @root = root task
1045: * @func = task execution function
1046: * @arg = 1st func argument
1047: * @id = Trigger ID
1048: * @opt_data = Optional data
1049: * @opt_dlen = Optional data length
1050: * return: NULL error or !=NULL new queued task
1051: */
1052: sched_task_t *
1053: schedSuspend(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long id,
1054: void *opt_data, size_t opt_dlen)
1055: {
1056: sched_task_t *task;
1057: void *ptr;
1058:
1059: if (!root || !func)
1060: return NULL;
1061:
1062: /* get new task */
1063: if (!(task = _sched_useTask(root)))
1064: return NULL;
1065:
1066: task->task_func = func;
1067: TASK_TYPE(task) = taskSUSPEND;
1068: TASK_ROOT(task) = root;
1069:
1070: TASK_ARG(task) = arg;
1071: TASK_VAL(task) = id;
1072:
1073: TASK_DATA(task) = opt_data;
1074: TASK_DATLEN(task) = opt_dlen;
1075:
1076: if (root->root_hooks.hook_add.suspend)
1077: ptr = root->root_hooks.hook_add.suspend(task, NULL);
1078: else
1079: ptr = NULL;
1080:
1081: if (!ptr) {
1082: #ifdef HAVE_LIBPTHREAD
1083: pthread_mutex_lock(&root->root_mtx[taskSUSPEND]);
1084: #endif
1085: TAILQ_INSERT_TAIL(&root->root_suspend, TASK_ID(task), task_node);
1086: #ifdef HAVE_LIBPTHREAD
1087: pthread_mutex_unlock(&root->root_mtx[taskSUSPEND]);
1088: #endif
1089: } else
1090: task = _sched_unuseTask(task);
1091:
1092: return task;
1093: }
1094:
1095: /*
1096: * schedCallOnce() - Call once from scheduler
1097: *
1098: * @root = root task
1099: * @func = task execution function
1100: * @arg = 1st func argument
1101: * @val = additional func argument
1102: * @opt_data = Optional data
1103: * @opt_dlen = Optional data length
1104: * return: return value from called func
1105: */
1106: sched_task_t *
1107: schedCallOnce(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long val,
1108: void *opt_data, size_t opt_dlen)
1109: {
1110: sched_task_t *task;
1111: void *ret;
1112:
1113: if (!root || !func)
1114: return NULL;
1115:
1116: /* get new task */
1117: if (!(task = _sched_useTask(root)))
1118: return NULL;
1119:
1120: task->task_func = func;
1121: TASK_TYPE(task) = taskEVENT;
1122: TASK_ROOT(task) = root;
1123:
1124: TASK_ARG(task) = arg;
1125: TASK_VAL(task) = val;
1126:
1127: TASK_DATA(task) = opt_data;
1128: TASK_DATLEN(task) = opt_dlen;
1129:
1130: ret = schedCall(task);
1131:
1132: _sched_unuseTask(task);
1133: return ret;
1134: }
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