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_t tasks_lock;
link_t tasks_head;
 
 
/** Initialize tasks
 *
 * Initialize kernel tasks support.
 *
 */
void task_init(void)
{
    TASK = NULL;
    spinlock_initialize(&tasks_lock);
    list_initialize(&tasks_head);
}
 
 
/** 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);
        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 107	Rev 413
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_t tasks_lock;	39	spinlock_t tasks_lock;
40	link_t tasks_head;	40	link_t tasks_head;
41		41
42		42
43	/** Initialize tasks	43	/** Initialize tasks
44	*	44	*
45	* Initialize kernel tasks support.	45	* Initialize kernel tasks support.
46	*	46	*
47	*/	47	*/
48	void task_init(void)	48	void task_init(void)
49	{	49	{
50	TASK = NULL;	50	TASK = NULL;
51	spinlock_initialize(&tasks_lock);	51	spinlock_initialize(&tasks_lock);
52	list_initialize(&tasks_head);	52	list_initialize(&tasks_head);
53	}	53	}
54		54
55		55
56	/** Create new task	56	/** Create new task
57	*	57	*
58	* Create new task with no threads.	58	* Create new task with no threads.
59	*	59	*
60	* @param m Task's virtual memory structure.	60	* @param m Task's virtual memory structure.
61	*	61	*
62	* @return New task's structure on success, NULL on failure.	62	* @return New task's structure on success, NULL on failure.
63	*	63	*
64	*/	64	*/
65	task_t task_create(vm_t m)	65	task_t task_create(vm_t m)
66	{	66	{
67	pri_t pri;	67	ipl_t ipl;
68	task_t *ta;	68	task_t *ta;
69		69
70	ta = (task_t *) malloc(sizeof(task_t));	70	ta = (task_t *) malloc(sizeof(task_t));
71	if (ta) {	71	if (ta) {
72	spinlock_initialize(&ta->lock);	72	spinlock_initialize(&ta->lock);
73	list_initialize(&ta->th_head);	73	list_initialize(&ta->th_head);
74	list_initialize(&ta->tasks_link);	74	list_initialize(&ta->tasks_link);
75	ta->vm = m;	75	ta->vm = m;
76		76
77	pri = cpu_priority_high();	77	ipl = interrupts_disable();
78	spinlock_lock(&tasks_lock);	78	spinlock_lock(&tasks_lock);
79	list_append(&ta->tasks_link, &tasks_head);	79	list_append(&ta->tasks_link, &tasks_head);
80	spinlock_unlock(&tasks_lock);	80	spinlock_unlock(&tasks_lock);
81	cpu_priority_restore(pri);	81	interrupts_restore(ipl);
82	}	82	}
83	return ta;	83	return ta;
84	}	84	}
85		85
86		86

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/proc/task.c @ 1688 – Rev 107 → 413