Annotation of libaitsched/src/tasks.c, revision 1.7
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 $
1.7 ! misho 6: * $Id: tasks.c,v 1.6.2.1 2012/05/10 15:30:18 misho Exp $
1.1 misho 7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
1.6 misho 15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012
1.1 misho 16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #include "global.h"
47:
48:
1.4 misho 49: #pragma GCC visibility push(hidden)
50:
51: inline sched_task_t *
52: _sched_useTask(sched_root_task_t * __restrict root)
53: {
1.7 ! misho 54: sched_task_t *task, *tmp;
1.4 misho 55:
1.7 ! misho 56: TAILQ_FOREACH_SAFE(task, &root->root_unuse, task_node, tmp) {
1.4 misho 57: if (!TASK_ISLOCKED(task)) {
1.5 misho 58: #ifdef HAVE_LIBPTHREAD
59: pthread_mutex_lock(&root->root_mtx[taskUNUSE]);
60: #endif
1.4 misho 61: TAILQ_REMOVE(&root->root_unuse, task, task_node);
1.5 misho 62: #ifdef HAVE_LIBPTHREAD
63: pthread_mutex_unlock(&root->root_mtx[taskUNUSE]);
64: #endif
1.4 misho 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: return task;
78: }
79:
80: inline sched_task_t *
81: _sched_unuseTask(sched_task_t * __restrict task)
82: {
83: TASK_UNLOCK(task);
1.5 misho 84: TASK_TYPE(task) = taskUNUSE;
85: #ifdef HAVE_LIBPTHREAD
86: pthread_mutex_lock(&TASK_ROOT(task)->root_mtx[taskUNUSE]);
87: #endif
88: TAILQ_INSERT_TAIL(&TASK_ROOT(task)->root_unuse, task, task_node);
89: #ifdef HAVE_LIBPTHREAD
90: pthread_mutex_unlock(&TASK_ROOT(task)->root_mtx[taskUNUSE]);
91: #endif
1.4 misho 92: task = NULL;
93:
94: return task;
95: }
96:
97: #pragma GCC visibility pop
98:
99:
1.1 misho 100: /*
1.2 misho 101: * schedRead() - Add READ I/O task to scheduler queue
1.6 misho 102: *
1.1 misho 103: * @root = root task
104: * @func = task execution function
105: * @arg = 1st func argument
1.2 misho 106: * @fd = fd handle
1.5 misho 107: * @opt_data = Optional data
108: * @opt_dlen = Optional data length
1.1 misho 109: * return: NULL error or !=NULL new queued task
110: */
111: sched_task_t *
1.5 misho 112: schedRead(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd,
113: void *opt_data, size_t opt_dlen)
1.1 misho 114: {
115: sched_task_t *task;
116: void *ptr;
117:
118: if (!root || !func)
119: return NULL;
120:
121: /* get new task */
1.4 misho 122: if (!(task = _sched_useTask(root)))
123: return NULL;
1.1 misho 124:
125: memset(task, 0, sizeof(sched_task_t));
126: task->task_id = 0;
1.4 misho 127: task->task_lock = 0;
1.1 misho 128: task->task_func = func;
1.5 misho 129: TASK_TYPE(task) = taskREAD;
130: TASK_ROOT(task) = root;
1.1 misho 131:
132: TASK_ARG(task) = arg;
1.2 misho 133: TASK_FD(task) = fd;
1.1 misho 134:
1.5 misho 135: TASK_DATA(task) = opt_data;
136: TASK_DATLEN(task) = opt_dlen;
137:
1.1 misho 138: if (root->root_hooks.hook_add.read)
139: ptr = root->root_hooks.hook_add.read(task, NULL);
140: else
141: ptr = NULL;
142:
1.5 misho 143: if (!ptr) {
144: #ifdef HAVE_LIBPTHREAD
145: pthread_mutex_lock(&root->root_mtx[taskREAD]);
146: #endif
1.1 misho 147: TAILQ_INSERT_TAIL(&root->root_read, task, task_node);
1.5 misho 148: #ifdef HAVE_LIBPTHREAD
149: pthread_mutex_unlock(&root->root_mtx[taskREAD]);
150: #endif
151: } else
1.4 misho 152: task = _sched_unuseTask(task);
1.1 misho 153:
154: return task;
155: }
156:
157: /*
1.2 misho 158: * schedWrite() - Add WRITE I/O task to scheduler queue
1.6 misho 159: *
1.1 misho 160: * @root = root task
161: * @func = task execution function
162: * @arg = 1st func argument
1.2 misho 163: * @fd = fd handle
1.5 misho 164: * @opt_data = Optional data
165: * @opt_dlen = Optional data length
1.1 misho 166: * return: NULL error or !=NULL new queued task
167: */
168: sched_task_t *
1.5 misho 169: schedWrite(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd,
170: void *opt_data, size_t opt_dlen)
1.1 misho 171: {
172: sched_task_t *task;
173: void *ptr;
174:
175: if (!root || !func)
176: return NULL;
177:
178: /* get new task */
1.4 misho 179: if (!(task = _sched_useTask(root)))
180: return NULL;
1.1 misho 181:
182: memset(task, 0, sizeof(sched_task_t));
183: task->task_id = 0;
1.4 misho 184: task->task_lock = 0;
1.1 misho 185: task->task_func = func;
1.5 misho 186: TASK_TYPE(task) = taskWRITE;
187: TASK_ROOT(task) = root;
1.1 misho 188:
189: TASK_ARG(task) = arg;
1.2 misho 190: TASK_FD(task) = fd;
1.1 misho 191:
1.5 misho 192: TASK_DATA(task) = opt_data;
193: TASK_DATLEN(task) = opt_dlen;
194:
1.1 misho 195: if (root->root_hooks.hook_add.write)
196: ptr = root->root_hooks.hook_add.write(task, NULL);
197: else
198: ptr = NULL;
199:
1.5 misho 200: if (!ptr) {
201: #ifdef HAVE_LIBPTHREAD
202: pthread_mutex_lock(&root->root_mtx[taskWRITE]);
203: #endif
1.1 misho 204: TAILQ_INSERT_TAIL(&root->root_write, task, task_node);
1.5 misho 205: #ifdef HAVE_LIBPTHREAD
206: pthread_mutex_unlock(&root->root_mtx[taskWRITE]);
207: #endif
208: } else
1.4 misho 209: task = _sched_unuseTask(task);
1.1 misho 210:
211: return task;
212: }
213:
214: /*
215: * schedTimer() - Add TIMER task to scheduler queue
1.6 misho 216: *
1.1 misho 217: * @root = root task
218: * @func = task execution function
219: * @arg = 1st func argument
1.5 misho 220: * @ts = timeout argument structure
221: * @opt_data = Optional data
222: * @opt_dlen = Optional data length
1.1 misho 223: * return: NULL error or !=NULL new queued task
224: */
225: sched_task_t *
1.5 misho 226: schedTimer(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, struct timespec ts,
227: void *opt_data, size_t opt_dlen)
1.1 misho 228: {
229: sched_task_t *task, *t = NULL;
230: void *ptr;
1.5 misho 231: struct timespec now;
1.1 misho 232:
233: if (!root || !func)
234: return NULL;
235:
236: /* get new task */
1.4 misho 237: if (!(task = _sched_useTask(root)))
238: return NULL;
1.1 misho 239:
240: memset(task, 0, sizeof(sched_task_t));
241: task->task_id = 0;
1.4 misho 242: task->task_lock = 0;
1.1 misho 243: task->task_func = func;
1.5 misho 244: TASK_TYPE(task) = taskTIMER;
245: TASK_ROOT(task) = root;
1.1 misho 246:
247: TASK_ARG(task) = arg;
248:
1.5 misho 249: TASK_DATA(task) = opt_data;
250: TASK_DATLEN(task) = opt_dlen;
251:
1.1 misho 252: /* calculate timeval structure */
1.5 misho 253: clock_gettime(CLOCK_MONOTONIC, &now);
254: now.tv_sec += ts.tv_sec;
255: now.tv_nsec += ts.tv_nsec;
256: if (now.tv_nsec >= 1000000000L) {
1.1 misho 257: now.tv_sec++;
1.5 misho 258: now.tv_nsec -= 1000000000L;
259: } else if (now.tv_nsec < 0) {
1.1 misho 260: now.tv_sec--;
1.5 misho 261: now.tv_nsec += 1000000000L;
1.1 misho 262: }
1.5 misho 263: TASK_TS(task) = now;
1.1 misho 264:
265: if (root->root_hooks.hook_add.timer)
266: ptr = root->root_hooks.hook_add.timer(task, NULL);
267: else
268: ptr = NULL;
269:
270: if (!ptr) {
1.5 misho 271: #ifdef HAVE_LIBPTHREAD
272: pthread_mutex_lock(&root->root_mtx[taskTIMER]);
273: #endif
1.1 misho 274: #ifdef TIMER_WITHOUT_SORT
275: TAILQ_INSERT_TAIL(&root->root_timer, task, task_node);
276: #else
277: TAILQ_FOREACH(t, &root->root_timer, task_node)
1.5 misho 278: if (sched_timespeccmp(&TASK_TS(task), &TASK_TS(t), -) < 1)
1.1 misho 279: break;
280: if (!t)
281: TAILQ_INSERT_TAIL(&root->root_timer, task, task_node);
282: else
283: TAILQ_INSERT_BEFORE(t, task, task_node);
284: #endif
1.5 misho 285: #ifdef HAVE_LIBPTHREAD
286: pthread_mutex_unlock(&root->root_mtx[taskTIMER]);
287: #endif
1.4 misho 288: } else
289: task = _sched_unuseTask(task);
1.1 misho 290:
291: return task;
292: }
293:
294: /*
295: * schedEvent() - Add EVENT task to scheduler queue
1.6 misho 296: *
1.1 misho 297: * @root = root task
298: * @func = task execution function
299: * @arg = 1st func argument
1.2 misho 300: * @val = additional func argument
1.5 misho 301: * @opt_data = Optional data
302: * @opt_dlen = Optional data length
1.1 misho 303: * return: NULL error or !=NULL new queued task
304: */
305: sched_task_t *
1.5 misho 306: schedEvent(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long val,
307: void *opt_data, size_t opt_dlen)
1.1 misho 308: {
309: sched_task_t *task;
310: void *ptr;
311:
312: if (!root || !func)
313: return NULL;
314:
315: /* get new task */
1.4 misho 316: if (!(task = _sched_useTask(root)))
317: return NULL;
1.1 misho 318:
319: memset(task, 0, sizeof(sched_task_t));
320: task->task_id = 0;
1.4 misho 321: task->task_lock = 0;
1.1 misho 322: task->task_func = func;
1.5 misho 323: TASK_TYPE(task) = taskEVENT;
324: TASK_ROOT(task) = root;
1.1 misho 325:
326: TASK_ARG(task) = arg;
1.2 misho 327: TASK_VAL(task) = val;
1.1 misho 328:
1.5 misho 329: TASK_DATA(task) = opt_data;
330: TASK_DATLEN(task) = opt_dlen;
331:
1.1 misho 332: if (root->root_hooks.hook_add.event)
333: ptr = root->root_hooks.hook_add.event(task, NULL);
334: else
335: ptr = NULL;
336:
1.5 misho 337: if (!ptr) {
338: #ifdef HAVE_LIBPTHREAD
339: pthread_mutex_lock(&root->root_mtx[taskEVENT]);
340: #endif
1.1 misho 341: TAILQ_INSERT_TAIL(&root->root_event, task, task_node);
1.5 misho 342: #ifdef HAVE_LIBPTHREAD
343: pthread_mutex_unlock(&root->root_mtx[taskEVENT]);
344: #endif
345: } else
1.4 misho 346: task = _sched_unuseTask(task);
1.1 misho 347:
348: return task;
349: }
350:
351:
352: /*
353: * schedEventLo() - Add EVENT_Lo task to scheduler queue
1.6 misho 354: *
1.1 misho 355: * @root = root task
356: * @func = task execution function
357: * @arg = 1st func argument
1.2 misho 358: * @val = additional func argument
1.5 misho 359: * @opt_data = Optional data
360: * @opt_dlen = Optional data length
1.1 misho 361: * return: NULL error or !=NULL new queued task
362: */
363: sched_task_t *
1.5 misho 364: schedEventLo(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long val,
365: void *opt_data, size_t opt_dlen)
1.1 misho 366: {
367: sched_task_t *task;
368: void *ptr;
369:
370: if (!root || !func)
371: return NULL;
372:
373: /* get new task */
1.4 misho 374: if (!(task = _sched_useTask(root)))
375: return NULL;
1.1 misho 376:
377: memset(task, 0, sizeof(sched_task_t));
378: task->task_id = 0;
1.4 misho 379: task->task_lock = 0;
1.1 misho 380: task->task_func = func;
1.5 misho 381: TASK_TYPE(task) = taskEVENT;
382: TASK_ROOT(task) = root;
1.1 misho 383:
384: TASK_ARG(task) = arg;
1.2 misho 385: TASK_VAL(task) = val;
1.1 misho 386:
1.5 misho 387: TASK_DATA(task) = opt_data;
388: TASK_DATLEN(task) = opt_dlen;
389:
1.1 misho 390: if (root->root_hooks.hook_add.eventlo)
391: ptr = root->root_hooks.hook_add.eventlo(task, NULL);
392: else
393: ptr = NULL;
394:
1.5 misho 395: if (!ptr) {
396: #ifdef HAVE_LIBPTHREAD
397: pthread_mutex_lock(&root->root_mtx[taskEVENTLO]);
398: #endif
1.1 misho 399: TAILQ_INSERT_TAIL(&root->root_eventlo, task, task_node);
1.5 misho 400: #ifdef HAVE_LIBPTHREAD
401: pthread_mutex_unlock(&root->root_mtx[taskEVENTLO]);
402: #endif
403: } else
1.4 misho 404: task = _sched_unuseTask(task);
1.1 misho 405:
406: return task;
407: }
408:
409: /*
410: * schedCallOnce() - Call once from scheduler
1.6 misho 411: *
1.1 misho 412: * @root = root task
413: * @func = task execution function
414: * @arg = 1st func argument
1.2 misho 415: * @val = additional func argument
1.5 misho 416: * @opt_data = Optional data
417: * @opt_dlen = Optional data length
1.2 misho 418: * return: return value from called func
1.1 misho 419: */
420: sched_task_t *
1.5 misho 421: schedCallOnce(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, u_long val,
422: void *opt_data, size_t opt_dlen)
1.1 misho 423: {
424: sched_task_t *task;
1.2 misho 425: void *ret;
1.1 misho 426:
427: if (!root || !func)
428: return NULL;
429:
430: /* get new task */
1.4 misho 431: if (!(task = _sched_useTask(root)))
432: return NULL;
1.1 misho 433:
434: memset(task, 0, sizeof(sched_task_t));
435: task->task_id = 0;
1.4 misho 436: task->task_lock = 0;
1.1 misho 437: task->task_func = func;
1.5 misho 438: TASK_TYPE(task) = taskEVENT;
439: TASK_ROOT(task) = root;
1.1 misho 440:
441: TASK_ARG(task) = arg;
1.2 misho 442: TASK_VAL(task) = val;
1.1 misho 443:
1.5 misho 444: TASK_DATA(task) = opt_data;
445: TASK_DATLEN(task) = opt_dlen;
446:
1.2 misho 447: ret = schedCall(task);
1.1 misho 448:
1.4 misho 449: _sched_unuseTask(task);
1.2 misho 450: return ret;
1.1 misho 451: }
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