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/as.h>
#include <mm/slab.h>
 
#include <synch/spinlock.h>
#include <arch.h>
#include <panic.h>
#include <adt/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 as Task's address space.
 *
 * @return New task's structure on success, NULL on failure.
 *
 */
task_t *task_create(as_t *as)
{
    ipl_t ipl;
    task_t *ta;
   
    ta = (task_t *) malloc(sizeof(task_t), 0);
 
    spinlock_initialize(&ta->lock, "task_ta_lock");
    list_initialize(&ta->th_head);
    list_initialize(&ta->tasks_link);
    ta->as = as;
   
    ipl = interrupts_disable();
    spinlock_lock(&tasks_lock);
    list_append(&ta->tasks_link, &tasks_head);
    spinlock_unlock(&tasks_lock);
    interrupts_restore(ipl);
 
    return ta;
}
 
 

Rev 814	Rev 822
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/as.h>	31	#include <mm/as.h>
32	#include <mm/slab.h>	32	#include <mm/slab.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 <adt/list.h>	37	#include <adt/list.h>
38		38
39	SPINLOCK_INITIALIZE(tasks_lock);	39	SPINLOCK_INITIALIZE(tasks_lock);
40	LIST_INITIALIZE(tasks_head);	40	LIST_INITIALIZE(tasks_head);
41		41
42	/** Initialize tasks	42	/** Initialize tasks
43	*	43	*
44	* Initialize kernel tasks support.	44	* Initialize kernel tasks support.
45	*	45	*
46	*/	46	*/
47	void task_init(void)	47	void task_init(void)
48	{	48	{
49	TASK = NULL;	49	TASK = NULL;
50	}	50	}
51		51
52		52
53	/** Create new task	53	/** Create new task
54	*	54	*
55	* Create new task with no threads.	55	* Create new task with no threads.
56	*	56	*
57	* @param as Task's address space.	57	* @param as Task's address space.
58	*	58	*
59	* @return New task's structure on success, NULL on failure.	59	* @return New task's structure on success, NULL on failure.
60	*	60	*
61	*/	61	*/
62	task_t task_create(as_t as)	62	task_t task_create(as_t as)
63	{	63	{
64	ipl_t ipl;	64	ipl_t ipl;
65	task_t *ta;	65	task_t *ta;
66		66
67	ta = (task_t *) malloc(sizeof(task_t));	67	ta = (task_t *) malloc(sizeof(task_t), 0);
68	if (ta) {	68
69	spinlock_initialize(&ta->lock, "task_ta_lock");	69	spinlock_initialize(&ta->lock, "task_ta_lock");
70	list_initialize(&ta->th_head);	70	list_initialize(&ta->th_head);
71	list_initialize(&ta->tasks_link);	71	list_initialize(&ta->tasks_link);
72	ta->as = as;	72	ta->as = as;
73		73
74	ipl = interrupts_disable();	74	ipl = interrupts_disable();
75	spinlock_lock(&tasks_lock);	75	spinlock_lock(&tasks_lock);
76	list_append(&ta->tasks_link, &tasks_head);	76	list_append(&ta->tasks_link, &tasks_head);
77	spinlock_unlock(&tasks_lock);	77	spinlock_unlock(&tasks_lock);
78	interrupts_restore(ipl);	78	interrupts_restore(ipl);
79	}	79
80	return ta;	80	return ta;
81	}	81	}
82		82
83		83

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/proc/task.c – Rev 814 → 822