Subversion Repositories HelenOS

Rev

Rev 788 | Rev 822 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1
/*
2
 * Copyright (C) 2001-2004 Jakub Jermar
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
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
29
#include <proc/thread.h>
30
#include <proc/task.h>
703 jermar 31
#include <mm/as.h>
814 palkovsky 32
#include <mm/slab.h>
1 jermar 33
 
34
#include <synch/spinlock.h>
35
#include <arch.h>
36
#include <panic.h>
788 jermar 37
#include <adt/list.h>
1 jermar 38
 
623 jermar 39
SPINLOCK_INITIALIZE(tasks_lock);
624 jermar 40
LIST_INITIALIZE(tasks_head);
1 jermar 41
 
107 decky 42
/** Initialize tasks
43
 *
44
 * Initialize kernel tasks support.
45
 *
46
 */
1 jermar 47
void task_init(void)
48
{
15 jermar 49
    TASK = NULL;
1 jermar 50
}
51
 
107 decky 52
 
53
/** Create new task
54
 *
55
 * Create new task with no threads.
56
 *
703 jermar 57
 * @param as Task's address space.
107 decky 58
 *
59
 * @return New task's structure on success, NULL on failure.
60
 *
61
 */
703 jermar 62
task_t *task_create(as_t *as)
1 jermar 63
{
413 jermar 64
    ipl_t ipl;
1 jermar 65
    task_t *ta;
66
 
67
    ta = (task_t *) malloc(sizeof(task_t));
68
    if (ta) {
552 palkovsky 69
        spinlock_initialize(&ta->lock, "task_ta_lock");
1 jermar 70
        list_initialize(&ta->th_head);
71
        list_initialize(&ta->tasks_link);
703 jermar 72
        ta->as = as;
1 jermar 73
 
413 jermar 74
        ipl = interrupts_disable();
1 jermar 75
        spinlock_lock(&tasks_lock);
76
        list_append(&ta->tasks_link, &tasks_head);
77
        spinlock_unlock(&tasks_lock);
413 jermar 78
        interrupts_restore(ipl);
1 jermar 79
    }
80
    return ta;
81
}
82