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 1.2 2011/10/04 12:34:33 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: #include <sys/types.h>
51: #include <sys/queue.h>
52: #include <sys/uio.h>
53:
54:
55: /* criteria type */
56: #define CRITERIA_CALL 0
57: #define CRITERIA_ARG 1
58: #define CRITERIA_FD 2
59: #define CRITERIA_VAL 3
60: #define CRITERIA_TV 4
61:
62:
63: /* early declaration for root & task */
64: typedef struct sched_Task sched_task_t;
65: typedef struct sched_RootTask sched_root_task_t;
66:
67: typedef enum {
68: taskREAD = 0,
69: taskWRITE,
70: taskTIMER,
71: taskEVENT,
72: taskREADY,
73: taskUNUSE,
74: taskMAX
75: } sched_task_type_t;
76:
77: /* hooks */
78: typedef void *(*sched_hook_func_t)(void *, void *);
79: struct sched_HooksTask {
80: struct {
81: /* read(sched_task_t *task, NULL) -> int */
82: sched_hook_func_t read;
83: /* write(sched_task_t *task, NULL) -> int */
84: sched_hook_func_t write;
85: /* event(sched_task_t *task, NULL) -> int */
86: sched_hook_func_t event;
87: /* eventlo(sched_task_t *task, NULL) -> int */
88: sched_hook_func_t eventlo;
89: /* timer(sched_task_t *task, struct timeval *tv) -> int */
90: sched_hook_func_t timer;
91: } hook_add;
92: struct {
93: /* cancel(sched_task_t *task, NULL) -> int */
94: sched_hook_func_t cancel;
95: /* run(sched_root_task_t *root, NULL) -> int */
96: sched_hook_func_t run;
97: /* fetch(sched_root_task_t *root, NULL) -> sched_task_t* */
98: sched_hook_func_t fetch;
99: } hook_exec;
100: struct {
101: /* init(sched_root_task_t *root, void *data) -> int */
102: sched_hook_func_t init;
103: /* fini(sched_root_task_t *root, NULL) -> int */
104: sched_hook_func_t fini;
105: } hook_root;
106: };
107: typedef struct sched_HooksTask hooks_task_t;
108:
109: /* task callback, like pthread callback! */
110: typedef void *(*sched_task_func_t)(sched_task_t * /* current task data*/);
111:
112: /* task & queue */
113: struct sched_Task {
114: unsigned int task_id;
115: sched_task_type_t task_type;
116:
117: sched_root_task_t *task_root;
118: #define TASK_ROOT(x) (x)->task_root
119: sched_task_func_t task_func;
120:
121: void *task_arg;
122: union {
123: unsigned long v;
124: int fd;
125: struct timeval tv;
126: } task_val;
127: #define TASK_ARG(x) (x)->task_arg
128: #define TASK_VAL(x) (x)->task_val.v
129: #define TASK_FD(x) (x)->task_val.fd
130: #define TASK_TV(x) (x)->task_val.tv
131:
132: struct iovec task_data;
133: #define TASK_DATA(x) (x)->task_data.iov_base
134: #define TASK_DATLEN(x) (x)->task_data.iov_len
135:
136: TAILQ_ENTRY(sched_Task) task_node;
137: };
138: typedef TAILQ_HEAD(, sched_Task) sched_queue_t;
139:
140: /* root task */
141: struct sched_RootTask {
142: int root_kq;
143: struct timeval root_wait;
144:
145: sched_queue_t root_read;
146: sched_queue_t root_write;
147: sched_queue_t root_timer;
148: sched_queue_t root_event;
149: sched_queue_t root_ready;
150: sched_queue_t root_unuse;
151: sched_queue_t root_eventlo;
152: int root_eventlo_miss;
153:
154: hooks_task_t root_hooks;
155: struct iovec root_data;
156: #define ROOT_DATA(x) (x)->root_data.iov_base
157: #define ROOT_DATLEN(x) (x)->root_data.iov_len
158: };
159:
160:
161: inline int sched_GetErrno();
162: inline const char *sched_GetError();
163: inline void sched_SetErr(int, char *, ...);
164:
165:
166: /*
167: * schedInit() - Init scheduler
168: * @data = optional data if !=NULL
169: * @datlen = data len if data is set
170: * return: allocated root task if ok or NULL error
171: */
172: sched_root_task_t *schedInit(void ** __restrict data, size_t datlen);
173: #define schedBegin() schedInit((void**) &schedRegisterHooks, 0)
174: /*
175: * schedEnd() - End scheduler & free all resources
176: * @root = root task
177: * return: -1 error or 0 ok
178: */
179: int schedEnd(sched_root_task_t ** __restrict root);
180: /*
181: * schedRegisterHooks() - Register IO handles and bind tasks to it
182: * @root = root task
183: * return: -1 error or 0 ok
184: */
185: int schedRegisterHooks(sched_root_task_t * __restrict root);
186: /*
187: * schedCall() - Call task execution function
188: * @task = current task
189: * return: !=NULL error or =NULL ok
190: */
191: inline void *schedCall(sched_task_t * __restrict task);
192: /*
193: * schedFetch() - Fetch ready task
194: * @root = root task
195: * return: =NULL error or !=NULL ready task
196: */
197: inline void *schedFetch(sched_root_task_t * __restrict root);
198: /*
199: * schedRun() - Scheduler *run loop*
200: * @root = root task
201: * @killState = kill condition variable, if !=0 stop scheduler loop
202: * return: -1 error or 0 ok
203: */
204: int schedRun(sched_root_task_t * __restrict root, volatile intptr_t * __restrict killState);
205: /*
206: * schedCancel() - Cancel task from scheduler
207: * @task = task
208: * return: -1 error or 0 ok
209: */
210: int schedCancel(sched_task_t * __restrict task);
211: /*
212: * schedCancelby() - Cancel task from scheduler by criteria
213: * @root = root task
214: * @queue = cancel from queue, if =NULL cancel same task from all queues
215: * @criteria = find task by criteria [CRITERIA_CALL|CRITERIA_ARG|CRITERIA_FD|CRITERIA_VAL|CRITERIA_TV]
216: * @param = search parameter
217: * @hook = custom cleanup hook function, may be NULL
218: * return: -1 error or 0 ok
219: */
220: int schedCancelby(sched_root_task_t * __restrict root, sched_queue_t * __restrict queue,
221: u_char criteria, void *param, sched_hook_func_t hook);
222:
223:
224: /*
225: * schedRead() - Add READ I/O task to scheduler queue
226: * @root = root task
227: * @func = task execution function
228: * @arg = 1st func argument
229: * @fd = fd handle
230: * return: NULL error or !=NULL new queued task
231: */
232: sched_task_t *schedRead(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd);
233: /*
234: * schedWrite() - Add WRITE I/O task to scheduler queue
235: * @root = root task
236: * @func = task execution function
237: * @arg = 1st func argument
238: * @fd = fd handle
239: * return: NULL error or !=NULL new queued task
240: */
241: sched_task_t *schedWrite(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd);
242: /*
243: * schedTimer() - Add TIMER task to scheduler queue
244: * @root = root task
245: * @func = task execution function
246: * @arg = 1st func argument
247: * @ms = arguments in microSecs, define period 1sec == 1000000
248: * return: NULL error or !=NULL new queued task
249: */
250: sched_task_t *schedTimer(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, unsigned int ms);
251: /*
252: * schedEvent() - Add EVENT task to scheduler queue
253: * @root = root task
254: * @func = task execution function
255: * @arg = 1st func argument
256: * @val = additional func argument
257: * return: NULL error or !=NULL new queued task
258: */
259: sched_task_t *schedEvent(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, unsigned long val);
260: /*
261: * schedEventLo() - Add EVENT_Lo task to scheduler queue
262: * @root = root task
263: * @func = task execution function
264: * @arg = 1st func argument
265: * @val = additional func argument
266: * return: NULL error or !=NULL new queued task
267: */
268: sched_task_t *schedEventLo(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, unsigned long val);
269: /*
270: * schedCallOnce() - Call once from scheduler
271: * @root = root task
272: * @func = task execution function
273: * @arg = 1st func argument
274: * @val = additional func argument
275: * return: return value from called func
276: */
277: sched_task_t *schedCallOnce(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, unsigned long val);
278:
279:
280: #endif
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