Annotation of prex/sys/include/task.h, Revision 1.1.1.1
1.1 nbrk 1: /*-
2: * Copyright (c) 2005-2006, Kohsuke Ohtani
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. Neither the name of the author nor the names of any co-contributors
14: * may be used to endorse or promote products derived from this software
15: * without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: #ifndef _TASK_H
31: #define _TASK_H
32:
33: #include <prex/capability.h> /* for cap_t */
34: #include <timer.h>
35:
36: /*
37: * Task struct
38: */
39: struct task {
40: int magic; /* magic number */
41: char name[MAXTASKNAME]; /* task name */
42: struct list link; /* link for all tasks in system */
43: struct list objects; /* objects owned by this task */
44: struct list threads; /* threads in this task */
45: vm_map_t map; /* address space description */
46: int suscnt; /* suspend counter */
47: cap_t capability; /* security permission flag */
48: struct timer alarm; /* alarm timer */
49: void (*handler)(int); /* pointer to excepion handler */
50: task_t parent; /* parent task */
51: };
52:
53: #define cur_task() (cur_thread->task)
54: #define task_valid(tsk) (kern_area(tsk) && ((tsk)->magic == TASK_MAGIC))
55: #define task_capable(cap) ((int)(cur_task()->capability & (cap)))
56:
57: /* vm option for task_create(). */
58: #define VM_NEW 0 /* Create new memory map */
59: #define VM_SHARE 1 /* Share parent's memory map */
60: #define VM_COPY 2 /* Duplicate parent's memory map */
61:
62: extern int task_create(task_t, int, task_t *);
63: extern int task_terminate(task_t);
64: extern task_t task_self(void);
65: extern int task_suspend(task_t);
66: extern int task_resume(task_t);
67: extern int task_name(task_t, const char *);
68: extern int task_getcap(task_t, cap_t *);
69: extern int task_setcap(task_t, cap_t *);
70: extern int task_access(task_t);
71: extern void task_bootstrap(void);
72: extern void task_dump(void);
73: extern void task_init(void);
74:
75: #endif /* !_TASK_H */
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