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 1.2.2.4 2011/10/04 23:03:31 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: /* exception(sched_root_task_t *root, NULL) -> int */
100: sched_hook_func_t exception;
101: } hook_exec;
102: struct {
103: /* init(sched_root_task_t *root, void *data) -> int */
104: sched_hook_func_t init;
105: /* fini(sched_root_task_t *root, NULL) -> int */
106: sched_hook_func_t fini;
107: /* error(sched_root_task_t *root, int errno) -> int */
108: sched_hook_func_t error;
109: } hook_root;
110: };
111: typedef struct sched_HooksTask hooks_task_t;
112:
113: /* task callback, like pthread callback! */
114: typedef void *(*sched_task_func_t)(sched_task_t * /* current task data*/);
115:
116: /* task & queue */
117: struct sched_Task {
118: unsigned int task_id;
119: sched_task_type_t task_type;
120:
121: sched_root_task_t *task_root;
122: #define TASK_ROOT(x) (x)->task_root
123: sched_task_func_t task_func;
124:
125: void *task_arg;
126: union {
127: unsigned long v;
128: intptr_t fd;
129: struct timeval tv;
130: } task_val;
131: #define TASK_ARG(x) (x)->task_arg
132: #define TASK_VAL(x) (x)->task_val.v
133: #define TASK_FD(x) (x)->task_val.fd
134: #define TASK_TV(x) (x)->task_val.tv
135:
136: struct iovec task_data;
137: #define TASK_DATA(x) (x)->task_data.iov_base
138: #define TASK_DATLEN(x) (x)->task_data.iov_len
139:
140: TAILQ_ENTRY(sched_Task) task_node;
141: };
142: typedef TAILQ_HEAD(, sched_Task) sched_queue_t;
143:
144: /* root task */
145: struct sched_RootTask {
146: int root_kq;
147: struct timeval root_wait;
148:
149: sched_queue_t root_read;
150: sched_queue_t root_write;
151: sched_queue_t root_timer;
152: sched_queue_t root_event;
153: sched_queue_t root_ready;
154: sched_queue_t root_unuse;
155: sched_queue_t root_eventlo;
156: int root_eventlo_miss;
157:
158: hooks_task_t root_hooks;
159: struct iovec root_data;
160: #define ROOT_DATA(x) (x)->root_data.iov_base
161: #define ROOT_DATLEN(x) (x)->root_data.iov_len
162: };
163:
164:
165: inline int sched_GetErrno();
166: inline const char *sched_GetError();
167: inline void sched_SetErr(int, char *, ...);
168:
169:
170: /*
171: * schedInit() - Init scheduler
172: * @data = optional data if !=NULL
173: * @datlen = data len if data is set
174: * return: allocated root task if ok or NULL error
175: */
176: sched_root_task_t *schedInit(void ** __restrict data, size_t datlen);
177: #define schedBegin() schedInit((void**) &schedRegisterHooks, 0)
178: /*
179: * schedEnd() - End scheduler & free all resources
180: * @root = root task
181: * return: -1 error or 0 ok
182: */
183: int schedEnd(sched_root_task_t ** __restrict root);
184: /*
185: * schedRegisterHooks() - Register IO handles and bind tasks to it
186: * @root = root task
187: * return: -1 error or 0 ok
188: */
189: int schedRegisterHooks(sched_root_task_t * __restrict root);
190: /*
191: * schedCall() - Call task execution function
192: * @task = current task
193: * return: !=NULL error or =NULL ok
194: */
195: inline void *schedCall(sched_task_t * __restrict task);
196: /*
197: * schedFetch() - Fetch ready task
198: * @root = root task
199: * return: =NULL error or !=NULL ready task
200: */
201: inline void *schedFetch(sched_root_task_t * __restrict root);
202: /*
203: * schedRun() - Scheduler *run loop*
204: * @root = root task
205: * @killState = kill condition variable, if !=0 stop scheduler loop
206: * return: -1 error or 0 ok
207: */
208: int schedRun(sched_root_task_t * __restrict root, volatile intptr_t * __restrict killState);
209: /*
210: * schedCancel() - Cancel task from scheduler
211: * @task = task
212: * return: -1 error or 0 ok
213: */
214: int schedCancel(sched_task_t * __restrict task);
215: /*
216: * schedCancelby() - Cancel task from scheduler by criteria
217: * @root = root task
218: * @queue = cancel from queue, if =NULL cancel same task from all queues
219: * @criteria = find task by criteria [CRITERIA_CALL|CRITERIA_ARG|CRITERIA_FD|CRITERIA_VAL|CRITERIA_TV]
220: * @param = search parameter
221: * @hook = custom cleanup hook function, may be NULL
222: * return: -1 error or 0 ok
223: */
224: int schedCancelby(sched_root_task_t * __restrict root, sched_queue_t * __restrict queue,
225: u_char criteria, void *param, sched_hook_func_t hook);
226:
227:
228: /*
229: * schedRead() - Add READ I/O task to scheduler queue
230: * @root = root task
231: * @func = task execution function
232: * @arg = 1st func argument
233: * @fd = fd handle
234: * return: NULL error or !=NULL new queued task
235: */
236: sched_task_t *schedRead(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd);
237: /*
238: * schedWrite() - Add WRITE I/O task to scheduler queue
239: * @root = root task
240: * @func = task execution function
241: * @arg = 1st func argument
242: * @fd = fd handle
243: * return: NULL error or !=NULL new queued task
244: */
245: sched_task_t *schedWrite(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, int fd);
246: /*
247: * schedTimer() - Add TIMER task to scheduler queue
248: * @root = root task
249: * @func = task execution function
250: * @arg = 1st func argument
251: * @tv = timeout argument structure
252: * return: NULL error or !=NULL new queued task
253: */
254: sched_task_t *schedTimer(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, struct timeval tv);
255: /*
256: * schedEvent() - Add EVENT task to scheduler queue
257: * @root = root task
258: * @func = task execution function
259: * @arg = 1st func argument
260: * @val = additional func argument
261: * return: NULL error or !=NULL new queued task
262: */
263: sched_task_t *schedEvent(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, unsigned long val);
264: /*
265: * schedEventLo() - Add EVENT_Lo task to scheduler queue
266: * @root = root task
267: * @func = task execution function
268: * @arg = 1st func argument
269: * @val = additional func argument
270: * return: NULL error or !=NULL new queued task
271: */
272: sched_task_t *schedEventLo(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, unsigned long val);
273: /*
274: * schedCallOnce() - Call once from scheduler
275: * @root = root task
276: * @func = task execution function
277: * @arg = 1st func argument
278: * @val = additional func argument
279: * return: return value from called func
280: */
281: sched_task_t *schedCallOnce(sched_root_task_t * __restrict root, sched_task_func_t func, void *arg, unsigned long val);
282:
283:
284: #endif
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