WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/proc/task.c


/*
 * Copyright (C) 2001-2004 Jakub Jermar
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <proc/thread.h>
#include <proc/task.h>
#include <mm/vm.h>
#include <mm/heap.h>
 
#include <synch/spinlock.h>
#include <arch.h>
#include <panic.h>
#include <list.h>
 
SPINLOCK_INITIALIZE(tasks_lock);
LIST_INITIALIZE(tasks_head);
 
 
/** Initialize tasks
 *
 * Initialize kernel tasks support.
 *
 */
void task_init(void)
{
    TASK = NULL;
 
}
 
 
/** Create new task
 *
 * Create new task with no threads.
 *
 * @param m Task's virtual memory structure.
 *
 * @return New task's structure on success, NULL on failure.
 *
 */
task_t *task_create(vm_t *m)
{
    ipl_t ipl;
    task_t *ta;
   
    ta = (task_t *) malloc(sizeof(task_t));
    if (ta) {
        spinlock_initialize(&ta->lock, "task_ta_lock");
        list_initialize(&ta->th_head);
        list_initialize(&ta->tasks_link);
        ta->vm = m;
       
        ipl = interrupts_disable();
        spinlock_lock(&tasks_lock);
        list_append(&ta->tasks_link, &tasks_head);
        spinlock_unlock(&tasks_lock);
        interrupts_restore(ipl);
    }
    return ta;
}
 
 

Rev 623	Rev 624
1	/*	1	/*
2	* Copyright (C) 2001-2004 Jakub Jermar	2	* Copyright (C) 2001-2004 Jakub Jermar
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	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	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.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	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	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	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	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	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	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.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <proc/thread.h>	29	#include <proc/thread.h>
30	#include <proc/task.h>	30	#include <proc/task.h>
31	#include <mm/vm.h>	31	#include <mm/vm.h>
32	#include <mm/heap.h>	32	#include <mm/heap.h>
33		33
34	#include <synch/spinlock.h>	34	#include <synch/spinlock.h>
35	#include <arch.h>	35	#include <arch.h>
36	#include <panic.h>	36	#include <panic.h>
37	#include <list.h>	37	#include <list.h>
38		38
39	SPINLOCK_INITIALIZE(tasks_lock);	39	SPINLOCK_INITIALIZE(tasks_lock);
40	link_t tasks_head;	40	LIST_INITIALIZE(tasks_head);
41		-
42		41
43	/** Initialize tasks	42	/** Initialize tasks
44	*	43	*
45	* Initialize kernel tasks support.	44	* Initialize kernel tasks support.
46	*	45	*
47	*/	46	*/
48	void task_init(void)	47	void task_init(void)
49	{	48	{
50	TASK = NULL;	49	TASK = NULL;
51	list_initialize(&tasks_head);	-
52	}	50	}
53		51
54		52
55	/** Create new task	53	/** Create new task
56	*	54	*
57	* Create new task with no threads.	55	* Create new task with no threads.
58	*	56	*
59	* @param m Task's virtual memory structure.	57	* @param m Task's virtual memory structure.
60	*	58	*
61	* @return New task's structure on success, NULL on failure.	59	* @return New task's structure on success, NULL on failure.
62	*	60	*
63	*/	61	*/
64	task_t task_create(vm_t m)	62	task_t task_create(vm_t m)
65	{	63	{
66	ipl_t ipl;	64	ipl_t ipl;
67	task_t *ta;	65	task_t *ta;
68		66
69	ta = (task_t *) malloc(sizeof(task_t));	67	ta = (task_t *) malloc(sizeof(task_t));
70	if (ta) {	68	if (ta) {
71	spinlock_initialize(&ta->lock, "task_ta_lock");	69	spinlock_initialize(&ta->lock, "task_ta_lock");
72	list_initialize(&ta->th_head);	70	list_initialize(&ta->th_head);
73	list_initialize(&ta->tasks_link);	71	list_initialize(&ta->tasks_link);
74	ta->vm = m;	72	ta->vm = m;
75		73
76	ipl = interrupts_disable();	74	ipl = interrupts_disable();
77	spinlock_lock(&tasks_lock);	75	spinlock_lock(&tasks_lock);
78	list_append(&ta->tasks_link, &tasks_head);	76	list_append(&ta->tasks_link, &tasks_head);
79	spinlock_unlock(&tasks_lock);	77	spinlock_unlock(&tasks_lock);
80	interrupts_restore(ipl);	78	interrupts_restore(ipl);
81	}	79	}
82	return ta;	80	return ta;
83	}	81	}
84		82
85		83

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/proc/task.c – Rev 623 → 624