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.h,v 1.1 2011/08/05 15:52:00 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
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: #ifndef __AITSCHED_H
47: #define __AITSCHED_H
48:
49:
50: /* criteria type */
51: #define CRITERIA_CALL 0
52: #define CRITERIA_ARG 1
53: #define CRITERIA_FD 2
54: #define CRITERIA_VAL 3
55: #define CRITERIA_TV 4
56:
57:
58: /* early declaration for root & task */
59: typedef struct sched_Task sched_task_t;
60: typedef struct sched_RootTask sched_root_task_t;
61:
62: typedef enum {
63: taskREAD = 0,
64: taskWRITE,
65: taskTIMER,
66: taskEVENT,
67: taskREADY,
68: taskUNUSE,
69: taskMAX
70: } sched_task_type_t;
71:
72: /* hooks */
73: typedef void *(*sched_hook_func_t)(void *, void *);
74: struct sched_HooksTask {
75: struct {
76: /* read(sched_task_t *task, NULL) -> int */
77: sched_hook_func_t read;
78: /* write(sched_task_t *task, NULL) -> int */
79: sched_hook_func_t write;
80: /* event(sched_task_t *task, NULL) -> int */
81: sched_hook_func_t event;
82: /* eventlo(sched_task_t *task, NULL) -> int */
83: sched_hook_func_t eventlo;
84: /* timer(sched_task_t *task, struct timeval *tv) -> int */
85: sched_hook_func_t timer;
86: } hook_add;
87: struct {
88: /* cancel(sched_task_t *task, NULL) -> int */
89: sched_hook_func_t cancel;
90: /* run(sched_root_task_t *root, NULL) -> int */
91: sched_hook_func_t run;
92: /* fetch(sched_root_task_t *root, NULL) -> sched_task_t* */
93: sched_hook_func_t fetch;
94: } hook_exec;
95: struct {
96: /* init(sched_root_task_t *root, void *data) -> int */
97: sched_hook_func_t init;
98: /* fini(sched_root_task_t *root, NULL) -> int */
99: sched_hook_func_t fini;
100: } hook_root;
101: };
102: typedef struct sched_HooksTask hooks_task_t;
103:
104: /* task callback, like pthread callback! */
105: typedef void *(*sched_task_func_t)(void *);
106:
107: /* task & queue */
108: struct sched_Task {
109: unsigned int task_id;
110: sched_task_type_t task_type;
111:
112: sched_root_task_t *task_root;
113: sched_task_func_t task_func;
114:
115: void *task_arg;
116: union {
117: unsigned long v;
118: int fd;
119: struct timeval tv;
120: } task_val;
121: #define TASK_ARG(x) (x)->task_arg
122: #define TASK_VAL(x) (x)->task_val.v
123: #define TASK_FD(x) (x)->task_val.fd
124: #define TASK_TV(x) (x)->task_val.tv
125:
126: struct iovec task_data;
127: #define TASK_DATA(x) (x)->task_data.iov_base
128: #define TASK_DATLEN(x) (x)->task_data.iov_len
129:
130: TAILQ_ENTRY(sched_Task) task_node;
131: };
132: typedef TAILQ_HEAD(, sched_Task) sched_queue_t;
133:
134: /* root task */
135: struct sched_RootTask {
136: int root_kq;
137: struct timeval root_wait;
138:
139: sched_queue_t root_read;
140: sched_queue_t root_write;
141: sched_queue_t root_timer;
142: sched_queue_t root_event;
143: sched_queue_t root_ready;
144: sched_queue_t root_unuse;
145: sched_queue_t root_eventlo;
146: int root_eventlo_miss;
147:
148: hooks_task_t root_hooks;
149: struct iovec root_data;
150: #define ROOT_DATA(x) (x)->root_data.iov_base
151: #define ROOT_DATLEN(x) (x)->root_data.iov_len
152: };
153:
154:
155: /*
156: * schedInit() - Init scheduler
157: * @data = optional data if !=NULL
158: * @datlen = data len if data is set
159: * return: allocated root task if ok or NULL error
160: */
161: sched_root_task_t *schedInit(void ** __restrict data, size_t datlen);
162: #define schedInitIO() schedInit(&schedRegisterIO, 0)
163: /*
164: * schedEnd() - End scheduler & free all resources
165: * @root = root task
166: * return: -1 error or 0 ok
167: */
168: int schedEnd(sched_root_task_t * __restrict root);
169: /*
170: * schedRegisterIO() - Register IO handles and bind tasks to it
171: * @root = root task
172: * return: -1 error or 0 ok
173: */
174: int schedRegisterIO(sched_root_task_t * __restrict root);
175: /*
176: * schedCall() - Call task execution function
177: * @task = current task
178: * return: !=NULL error or =NULL ok
179: */
180: inline void *schedCall(sched_task_t * __restrict task);
181: /*
182: * schedFetch() - Fetch ready task
183: * @root = root task
184: * return: =NULL error or !=NULL ready task
185: */
186: inline void *schedFetch(sched_root_task_t * __restrict root);
187: /*
188: * schedRun() - Scheduler *run loop*
189: * @root = root task
190: * return: -1 error or 0 ok
191: */
192: int schedRun(sched_root_task_t * __restrict root);
193: /*
194: * schedCancel() - Cancel task from scheduler
195: * @task = task
196: * return: -1 error or 0 ok
197: */
198: int schedCancel(sched_task_t * __restrict task);
199: /*
200: * schedCancelby() - Cancel task from scheduler by criteria
201: * @root = root task
202: * @queue = cancel from queue, if =NULL cancel same task from all queues
203: * @criteria = find task by criteria [CRITERIA_CALL|CRITERIA_ARG|CRITERIA_FD|CRITERIA_VAL|CRITERIA_TV]
204: * @param = search parameter
205: * @hook = custom cleanup hook function, may be NULL
206: * return: -1 error or 0 ok
207: */
208: int schedCancelby(sched_root_task_t * __restrict root, sched_queue_t * __restrict queue,
209: u_char criteria, void *param, sched_hook_func_t hook);
210:
211:
212: /*
213: * schedRead() - Add READ task to scheduler queue
214: * @root = root task
215: * @func = task execution function
216: * @arg = 1st func argument
217: * @... = next func arguments, like fd handle
218: * return: NULL error or !=NULL new queued task
219: */
220: sched_task_t *schedRead(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, ...);
221: /*
222: * schedWrite() - Add WRITE task to scheduler queue
223: * @root = root task
224: * @func = task execution function
225: * @arg = 1st func argument
226: * @... = next func arguments, like fd handle
227: * return: NULL error or !=NULL new queued task
228: */
229: sched_task_t *schedWrite(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, ...);
230: /*
231: * schedTimer() - Add TIMER task to scheduler queue
232: * @root = root task
233: * @func = task execution function
234: * @arg = 1st func argument
235: * @... = next func arguments in microSecs, define period 1sec == 1000000
236: * return: NULL error or !=NULL new queued task
237: */
238: sched_task_t *schedTimer(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, ...);
239: /*
240: * schedEvent() - Add EVENT task to scheduler queue
241: * @root = root task
242: * @func = task execution function
243: * @arg = 1st func argument
244: * @... = next func arguments, like u_long
245: * return: NULL error or !=NULL new queued task
246: */
247: sched_task_t *schedEvent(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, ...);
248: /*
249: * schedEventLo() - Add EVENT_Lo task to scheduler queue
250: * @root = root task
251: * @func = task execution function
252: * @arg = 1st func argument
253: * @... = next func arguments, like u_long
254: * return: NULL error or !=NULL new queued task
255: */
256: sched_task_t *schedEventLo(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, ...);
257: /*
258: * schedCallOnce() - Call once from scheduler
259: * @root = root task
260: * @func = task execution function
261: * @arg = 1st func argument
262: * @... = next func arguments, like u_long
263: * return: NULL error or !=NULL new queued task
264: */
265: sched_task_t *schedCallOnce(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, ...);
266:
267:
268: #endif
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