WebSVN – HelenOS – Diff – /branches/rcu/kernel/generic/src/time/timeout.c


/*
 * Copyright (C) 2001-2004 Jakub Jermar
 * Copyright (C) 2007 Vojtech Mencl
 * 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.
 */
 
/** @addtogroup time
 * @{
 */
 
/**
 * @file
 * @brief   Timeout management functions.
 */
 
#include <time/timeout.h>
#include <arch/types.h>
#include <config.h>
#include <panic.h>
#include <synch/spinlock.h>
#include <func.h>
#include <cpu.h>
#include <arch/asm.h>
#include <arch.h>
 
 
/** Initialize timeouts
 *
 * Initialize kernel timeouts.
 *
 */
void timeout_init(void)
{
    spinlock_initialize(&CPU->timeoutlock, "timeout_lock");
 
#if defined CONFIG_TIMEOUT_AVL_TREE
    avltree_create(&CPU->timeout_active_tree);
#elif defined CONFIG_TIMEOUT_FAVL_TREE
    favltree_create(&CPU->timeout_active_tree);
#elif defined CONFIG_TIMEOUT_EXTAVL_TREE
    extavltree_create(&CPU->timeout_active_tree);
#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE
    extavlreltree_create(&CPU->timeout_active_tree);
#else
    list_initialize(&CPU->timeout_active_head);
#endif
}
 
 
/** Reinitialize timeout
 *
 * Initialize all members except the lock.
 *
 * @param t Timeout to be initialized.
 *
 */
void timeout_reinitialize(timeout_t *t)
{
    t->cpu = NULL;
    t->handler = NULL;
    t->arg = NULL;
 
#if defined CONFIG_TIMEOUT_AVL_TREE
    avltree_node_initialize(&t->node);
#elif defined CONFIG_TIMEOUT_FAVL_TREE
    favltree_node_initialize(&t->node);
#elif defined CONFIG_TIMEOUT_EXTAVL_TREE
    extavltree_node_initialize(&t->node);
#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE
    extavlreltree_node_initialize(&t->node);
#else
    t->ticks = 0;
    link_initialize(&t->link);
#endif
}
 
 
/** Initialize timeout
 *
 * Initialize all members including the lock.
 *
 * @param t Timeout to be initialized.
 *
 */
void timeout_initialize(timeout_t *t)
{
    spinlock_initialize(&t->lock, "timeout_t_lock");
    timeout_reinitialize(t);
}
 
#if defined CONFIG_TIMEOUT_AVL_TREE || \
    defined CONFIG_TIMEOUT_FAVL_TREE || \
    defined CONFIG_TIMEOUT_EXTAVL_TREE || \
    defined CONFIG_TIMEOUT_EXTAVLREL_TREE
 
/** Register timeout
 *
 * Insert timeout handler f (with argument arg)
 * to timeout tree and make it execute in
 * time microseconds (or slightly more).
 *
 * @param t    Timeout structure.
 * @param time Number of usec in the future to execute
 *             the handler.
 * @param f    Timeout handler function.
 * @param arg  Timeout handler argument.
 *
 */
void timeout_register(timeout_t *t, uint64_t time, timeout_handler_t f, void *arg)
{
    ipl_t ipl;
 
    ipl = interrupts_disable();
    spinlock_lock(&CPU->timeoutlock);
    spinlock_lock(&t->lock);
 
    if (t->cpu)
        panic("t->cpu != 0");
   
    t->cpu = CPU;
    t->handler = f;
    t->arg = arg;
    t->node.key = us2ticks(time);
 
    /*
     * Insert timeout into tree structure.
     */
#if defined CONFIG_TIMEOUT_AVL_TREE
    avltree_insert(&CPU->timeout_active_tree,&t->node);
#elif defined CONFIG_TIMEOUT_FAVL_TREE
    favltree_insert(&CPU->timeout_active_tree,&t->node);
#elif defined CONFIG_TIMEOUT_EXTAVL_TREE
    extavltree_insert(&CPU->timeout_active_tree,&t->node);
#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE
    extavlreltree_insert(&CPU->timeout_active_tree,&t->node);
#endif
 
    spinlock_unlock(&t->lock);
    spinlock_unlock(&CPU->timeoutlock);
    interrupts_restore(ipl);
}
 
 
/** Unregister timeout
 *
 * Remove timeout from timeout tree structure.
 *
 * @param t Timeout to unregister.
 *
 * @return true on success, false on failure.
 */
bool timeout_unregister(timeout_t *t)
{
    ipl_t ipl;
 
grab_locks:
    ipl = interrupts_disable();
    spinlock_lock(&t->lock);
    if (!t->cpu) {
        spinlock_unlock(&t->lock);
        interrupts_restore(ipl);
        return false;
    }
    if (!spinlock_trylock(&t->cpu->timeoutlock)) {
        spinlock_unlock(&t->lock);
        interrupts_restore(ipl);       
        goto grab_locks;
    }
    /*
     * Now we know for sure that t hasn't been activated yet
     * and is lurking in t->cpu->timeout_active_head queue.
     */
 
    /*
     * Delete timeout from tree structure.
     */
#if defined CONFIG_TIMEOUT_AVL_TREE
    avltree_delete(&t->cpu->timeout_active_tree,&t->node);
#elif defined CONFIG_TIMEOUT_FAVL_TREE
    favltree_delete(&t->cpu->timeout_active_tree,&t->node);
#elif defined CONFIG_TIMEOUT_EXTAVL_TREE
    extavltree_delete(&t->cpu->timeout_active_tree,&t->node);
#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE
    extavlreltree_delete(&t->cpu->timeout_active_tree,&t->node);
#endif
 
    spinlock_unlock(&t->cpu->timeoutlock);
 
    timeout_reinitialize(t);
    spinlock_unlock(&t->lock);
 
    interrupts_restore(ipl);
    return true;
}
 
#else
 
/** Register timeout
 *
 * Insert timeout handler f (with argument arg)
 * to timeout list and make it execute in
 * time microseconds (or slightly more).
 *
 * @param t    Timeout structure.
 * @param time Number of usec in the future to execute
 *             the handler.
 * @param f    Timeout handler function.
 * @param arg  Timeout handler argument.
 *
 */
void timeout_register(timeout_t *t, uint64_t time, timeout_handler_t f, void *arg)
{
    timeout_t *hlp = NULL;
    link_t *l, *m;
    ipl_t ipl;
    uint64_t sum;
 
    ipl = interrupts_disable();
    spinlock_lock(&CPU->timeoutlock);
    spinlock_lock(&t->lock);
 
    if (t->cpu)
        panic("t->cpu != 0");
 
    t->cpu = CPU;
    t->ticks = us2ticks(time);
   
    t->handler = f;
    t->arg = arg;
 
    /*
     * Insert t into the active timeouts list according to t->ticks.
     */
    sum = 0;
    l = CPU->timeout_active_head.next;
    while (l != &CPU->timeout_active_head) {
        hlp = list_get_instance(l, timeout_t, link);
        spinlock_lock(&hlp->lock);
        if (t->ticks < sum + hlp->ticks) {
            spinlock_unlock(&hlp->lock);
            break;
        }
        sum += hlp->ticks;
        spinlock_unlock(&hlp->lock);
        l = l->next;
    }
 
    m = l->prev;
    list_prepend(&t->link, m); /* avoid using l->prev */
 
    /*
     * Adjust t->ticks according to ticks accumulated in h's predecessors.
     */
    t->ticks -= sum;
 
    /*
     * Decrease ticks of t's immediate succesor by t->ticks.
     */
    if (l != &CPU->timeout_active_head) {
        spinlock_lock(&hlp->lock);
        hlp->ticks -= t->ticks;
        spinlock_unlock(&hlp->lock);
    }
 
    spinlock_unlock(&t->lock);
    spinlock_unlock(&CPU->timeoutlock);
    interrupts_restore(ipl);
}
 
 
/** Unregister timeout
 *
 * Remove timeout from timeout list.
 *
 * @param t Timeout to unregister.
 *
 * @return true on success, false on failure.
 */
bool timeout_unregister(timeout_t *t)
{
    timeout_t *hlp;
    link_t *l;
    ipl_t ipl;
 
grab_locks:
    ipl = interrupts_disable();
    spinlock_lock(&t->lock);
    if (!t->cpu) {
        spinlock_unlock(&t->lock);
        interrupts_restore(ipl);
        return false;
    }
    if (!spinlock_trylock(&t->cpu->timeoutlock)) {
        spinlock_unlock(&t->lock);
        interrupts_restore(ipl);       
        goto grab_locks;
    }
   
    /*
     * Now we know for sure that t hasn't been activated yet
     * and is lurking in t->cpu->timeout_active_head queue.
     */
 
    l = t->link.next;
    if (l != &t->cpu->timeout_active_head) {
        hlp = list_get_instance(l, timeout_t, link);
        spinlock_lock(&hlp->lock);
        hlp->ticks += t->ticks;
        spinlock_unlock(&hlp->lock);
    }
   
    list_remove(&t->link);
    spinlock_unlock(&t->cpu->timeoutlock);
 
    timeout_reinitialize(t);
    spinlock_unlock(&t->lock);
 
    interrupts_restore(ipl);
    return true;
}
 
#endif
/** @}
 */
 

Rev 2450	Rev 2461
1	/*	1	/*
2	* Copyright (C) 2001-2004 Jakub Jermar	2	* Copyright (C) 2001-2004 Jakub Jermar
3	* Copyright (C) 2007 Vojtech Mencl	3	* Copyright (C) 2007 Vojtech Mencl
4	* All rights reserved.	4	* All rights reserved.
5	*	5	*
6	* Redistribution and use in source and binary forms, with or without	6	* Redistribution and use in source and binary forms, with or without
7	* modification, are permitted provided that the following conditions	7	* modification, are permitted provided that the following conditions
8	* are met:	8	* are met:
9	*	9	*
10	* - Redistributions of source code must retain the above copyright	10	* - Redistributions of source code must retain the above copyright
11	* notice, this list of conditions and the following disclaimer.	11	* notice, this list of conditions and the following disclaimer.
12	* - Redistributions in binary form must reproduce the above copyright	12	* - Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the	13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the distribution.	14	* documentation and/or other materials provided with the distribution.
15	* - The name of the author may not be used to endorse or promote products	15	* - The name of the author may not be used to endorse or promote products
16	* derived from this software without specific prior written permission.	16	* derived from this software without specific prior written permission.
17	*	17	*
18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	18	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	19	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	20	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	21	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	22	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	23	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	27	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	28	*/
29		29
30	/** @addtogroup time	30	/** @addtogroup time
31	* @{	31	* @{
32	*/	32	*/
33		33
34	/**	34	/**
35	* @file	35	* @file
36	* @brief Timeout management functions.	36	* @brief Timeout management functions.
37	*/	37	*/
38		38
39	#include <time/timeout.h>	39	#include <time/timeout.h>
40	#include <arch/types.h>	40	#include <arch/types.h>
41	#include <config.h>	41	#include <config.h>
42	#include <panic.h>	42	#include <panic.h>
43	#include <synch/spinlock.h>	43	#include <synch/spinlock.h>
44	#include <func.h>	44	#include <func.h>
45	#include <cpu.h>	45	#include <cpu.h>
46	#include <arch/asm.h>	46	#include <arch/asm.h>
47	#include <arch.h>	47	#include <arch.h>
48		48
49		49
50	/** Initialize timeouts	50	/** Initialize timeouts
51	*	51	*
52	* Initialize kernel timeouts.	52	* Initialize kernel timeouts.
53	*	53	*
54	*/	54	*/
55	void timeout_init(void)	55	void timeout_init(void)
56	{	56	{
57	spinlock_initialize(&CPU->timeoutlock, "timeout_lock");	57	spinlock_initialize(&CPU->timeoutlock, "timeout_lock");
58		58
59	#if defined CONFIG_TIMEOUT_AVL_TREE	59	#if defined CONFIG_TIMEOUT_AVL_TREE
60	avltree_create(&CPU->timeout_active_tree);	60	avltree_create(&CPU->timeout_active_tree);
-		61	#elif defined CONFIG_TIMEOUT_FAVL_TREE
-		62	favltree_create(&CPU->timeout_active_tree);
61	#elif defined CONFIG_TIMEOUT_EXTAVL_TREE	63	#elif defined CONFIG_TIMEOUT_EXTAVL_TREE
62	extavltree_create(&CPU->timeout_active_tree);	64	extavltree_create(&CPU->timeout_active_tree);
63	#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE	65	#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE
64	extavlreltree_create(&CPU->timeout_active_tree);	66	extavlreltree_create(&CPU->timeout_active_tree);
65	#else	67	#else
66	list_initialize(&CPU->timeout_active_head);	68	list_initialize(&CPU->timeout_active_head);
67	#endif	69	#endif
68	}	70	}
69		71
70		72
71	/** Reinitialize timeout	73	/** Reinitialize timeout
72	*	74	*
73	* Initialize all members except the lock.	75	* Initialize all members except the lock.
74	*	76	*
75	* @param t Timeout to be initialized.	77	* @param t Timeout to be initialized.
76	*	78	*
77	*/	79	*/
78	void timeout_reinitialize(timeout_t *t)	80	void timeout_reinitialize(timeout_t *t)
79	{	81	{
80	t->cpu = NULL;	82	t->cpu = NULL;
81	t->handler = NULL;	83	t->handler = NULL;
82	t->arg = NULL;	84	t->arg = NULL;
83		85
84	#if defined CONFIG_TIMEOUT_AVL_TREE	86	#if defined CONFIG_TIMEOUT_AVL_TREE
85	avltree_node_initialize(&t->node);	87	avltree_node_initialize(&t->node);
-		88	#elif defined CONFIG_TIMEOUT_FAVL_TREE
-		89	favltree_node_initialize(&t->node);
86	#elif defined CONFIG_TIMEOUT_EXTAVL_TREE	90	#elif defined CONFIG_TIMEOUT_EXTAVL_TREE
87	extavltree_node_initialize(&t->node);	91	extavltree_node_initialize(&t->node);
88	#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE	92	#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE
89	extavlreltree_node_initialize(&t->node);	93	extavlreltree_node_initialize(&t->node);
90	#else	94	#else
91	t->ticks = 0;	95	t->ticks = 0;
92	link_initialize(&t->link);	96	link_initialize(&t->link);
93	#endif	97	#endif
94	}	98	}
95		99
96		100
97	/** Initialize timeout	101	/** Initialize timeout
98	*	102	*
99	* Initialize all members including the lock.	103	* Initialize all members including the lock.
100	*	104	*
101	* @param t Timeout to be initialized.	105	* @param t Timeout to be initialized.
102	*	106	*
103	*/	107	*/
104	void timeout_initialize(timeout_t *t)	108	void timeout_initialize(timeout_t *t)
105	{	109	{
106	spinlock_initialize(&t->lock, "timeout_t_lock");	110	spinlock_initialize(&t->lock, "timeout_t_lock");
107	timeout_reinitialize(t);	111	timeout_reinitialize(t);
108	}	112	}
109		113
110	#if defined CONFIG_TIMEOUT_AVL_TREE \|\| \	114	#if defined CONFIG_TIMEOUT_AVL_TREE \|\| \
-		115	defined CONFIG_TIMEOUT_FAVL_TREE \|\| \
111	defined CONFIG_TIMEOUT_EXTAVL_TREE \|\| \	116	defined CONFIG_TIMEOUT_EXTAVL_TREE \|\| \
112	defined CONFIG_TIMEOUT_EXTAVLREL_TREE	117	defined CONFIG_TIMEOUT_EXTAVLREL_TREE
113		118
114	/** Register timeout	119	/** Register timeout
115	*	120	*
116	* Insert timeout handler f (with argument arg)	121	* Insert timeout handler f (with argument arg)
117	* to timeout ExtAVL tree and make it execute in	122	* to timeout tree and make it execute in
118	* time microseconds (or slightly more).	123	* time microseconds (or slightly more).
119	*	124	*
120	* @param t Timeout structure.	125	* @param t Timeout structure.
121	* @param time Number of usec in the future to execute	126	* @param time Number of usec in the future to execute
122	* the handler.	127	* the handler.
123	* @param f Timeout handler function.	128	* @param f Timeout handler function.
124	* @param arg Timeout handler argument.	129	* @param arg Timeout handler argument.
125	*	130	*
126	*/	131	*/
127	void timeout_register(timeout_t t, uint64_t time, timeout_handler_t f, void arg)	132	void timeout_register(timeout_t t, uint64_t time, timeout_handler_t f, void arg)
128	{	133	{
129	ipl_t ipl;	134	ipl_t ipl;
130		135
131	ipl = interrupts_disable();	136	ipl = interrupts_disable();
132	spinlock_lock(&CPU->timeoutlock);	137	spinlock_lock(&CPU->timeoutlock);
133	spinlock_lock(&t->lock);	138	spinlock_lock(&t->lock);
134		139
135	if (t->cpu)	140	if (t->cpu)
136	panic("t->cpu != 0");	141	panic("t->cpu != 0");
137		142
138	t->cpu = CPU;	143	t->cpu = CPU;
139	t->handler = f;	144	t->handler = f;
140	t->arg = arg;	145	t->arg = arg;
141	t->node.key = us2ticks(time);	146	t->node.key = us2ticks(time);
142		147
143	/*	148	/*
144	* Put timeout into tree structure.	149	* Insert timeout into tree structure.
145	*/	150	*/
146	#if defined CONFIG_TIMEOUT_AVL_TREE	151	#if defined CONFIG_TIMEOUT_AVL_TREE
147	avltree_insert(&CPU->timeout_active_tree,&t->node);	152	avltree_insert(&CPU->timeout_active_tree,&t->node);
-		153	#elif defined CONFIG_TIMEOUT_FAVL_TREE
-		154	favltree_insert(&CPU->timeout_active_tree,&t->node);
148	#elif defined CONFIG_TIMEOUT_EXTAVL_TREE	155	#elif defined CONFIG_TIMEOUT_EXTAVL_TREE
149	extavltree_insert(&CPU->timeout_active_tree,&t->node);	156	extavltree_insert(&CPU->timeout_active_tree,&t->node);
150	#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE	157	#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE
151	extavlreltree_insert(&CPU->timeout_active_tree,&t->node);	158	extavlreltree_insert(&CPU->timeout_active_tree,&t->node);
152	#endif	159	#endif
153		160
154	spinlock_unlock(&t->lock);	161	spinlock_unlock(&t->lock);
155	spinlock_unlock(&CPU->timeoutlock);	162	spinlock_unlock(&CPU->timeoutlock);
156	interrupts_restore(ipl);	163	interrupts_restore(ipl);
157	}	164	}
158		165
159		166
160	/** Unregister timeout	167	/** Unregister timeout
161	*	168	*
162	* Remove timeout from timeout ExtAVL tree structure.	169	* Remove timeout from timeout tree structure.
163	*	170	*
164	* @param t Timeout to unregister.	171	* @param t Timeout to unregister.
165	*	172	*
166	* @return true on success, false on failure.	173	* @return true on success, false on failure.
167	*/	174	*/
168	bool timeout_unregister(timeout_t *t)	175	bool timeout_unregister(timeout_t *t)
169	{	176	{
170	ipl_t ipl;	177	ipl_t ipl;
171		178
172	grab_locks:	179	grab_locks:
173	ipl = interrupts_disable();	180	ipl = interrupts_disable();
174	spinlock_lock(&t->lock);	181	spinlock_lock(&t->lock);
175	if (!t->cpu) {	182	if (!t->cpu) {
176	spinlock_unlock(&t->lock);	183	spinlock_unlock(&t->lock);
177	interrupts_restore(ipl);	184	interrupts_restore(ipl);
178	return false;	185	return false;
179	}	186	}
180	if (!spinlock_trylock(&t->cpu->timeoutlock)) {	187	if (!spinlock_trylock(&t->cpu->timeoutlock)) {
181	spinlock_unlock(&t->lock);	188	spinlock_unlock(&t->lock);
182	interrupts_restore(ipl);	189	interrupts_restore(ipl);
183	goto grab_locks;	190	goto grab_locks;
184	}	191	}
185	/*	192	/*
186	* Now we know for sure that t hasn't been activated yet	193	* Now we know for sure that t hasn't been activated yet
187	* and is lurking in t->cpu->timeout_active_head queue.	194	* and is lurking in t->cpu->timeout_active_head queue.
188	*/	195	*/
189		196
190	/*	197	/*
191	* Delete timeout from tree structure.	198	* Delete timeout from tree structure.
192	*/	199	*/
193	#if defined CONFIG_TIMEOUT_AVL_TREE	200	#if defined CONFIG_TIMEOUT_AVL_TREE
194	avltree_delete(&t->cpu->timeout_active_tree,&t->node);	201	avltree_delete(&t->cpu->timeout_active_tree,&t->node);
-		202	#elif defined CONFIG_TIMEOUT_FAVL_TREE
-		203	favltree_delete(&t->cpu->timeout_active_tree,&t->node);
195	#elif defined CONFIG_TIMEOUT_EXTAVL_TREE	204	#elif defined CONFIG_TIMEOUT_EXTAVL_TREE
196	extavltree_delete(&t->cpu->timeout_active_tree,&t->node);	205	extavltree_delete(&t->cpu->timeout_active_tree,&t->node);
197	#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE	206	#elif defined CONFIG_TIMEOUT_EXTAVLREL_TREE
198	extavlreltree_delete(&t->cpu->timeout_active_tree,&t->node);	207	extavlreltree_delete(&t->cpu->timeout_active_tree,&t->node);
199	#endif	208	#endif
200		209
201	spinlock_unlock(&t->cpu->timeoutlock);	210	spinlock_unlock(&t->cpu->timeoutlock);
202		211
203	timeout_reinitialize(t);	212	timeout_reinitialize(t);
204	spinlock_unlock(&t->lock);	213	spinlock_unlock(&t->lock);
205		214
206	interrupts_restore(ipl);	215	interrupts_restore(ipl);
207	return true;	216	return true;
208	}	217	}
209		218
210	#else	219	#else
211		220
212	/** Register timeout	221	/** Register timeout
213	*	222	*
214	* Insert timeout handler f (with argument arg)	223	* Insert timeout handler f (with argument arg)
215	* to timeout list and make it execute in	224	* to timeout list and make it execute in
216	* time microseconds (or slightly more).	225	* time microseconds (or slightly more).
217	*	226	*
218	* @param t Timeout structure.	227	* @param t Timeout structure.
219	* @param time Number of usec in the future to execute	228	* @param time Number of usec in the future to execute
220	* the handler.	229	* the handler.
221	* @param f Timeout handler function.	230	* @param f Timeout handler function.
222	* @param arg Timeout handler argument.	231	* @param arg Timeout handler argument.
223	*	232	*
224	*/	233	*/
225	void timeout_register(timeout_t t, uint64_t time, timeout_handler_t f, void arg)	234	void timeout_register(timeout_t t, uint64_t time, timeout_handler_t f, void arg)
226	{	235	{
227	timeout_t *hlp = NULL;	236	timeout_t *hlp = NULL;
228	link_t l, m;	237	link_t l, m;
229	ipl_t ipl;	238	ipl_t ipl;
230	uint64_t sum;	239	uint64_t sum;
231		240
232	ipl = interrupts_disable();	241	ipl = interrupts_disable();
233	spinlock_lock(&CPU->timeoutlock);	242	spinlock_lock(&CPU->timeoutlock);
234	spinlock_lock(&t->lock);	243	spinlock_lock(&t->lock);
235		244
236	if (t->cpu)	245	if (t->cpu)
237	panic("t->cpu != 0");	246	panic("t->cpu != 0");
238		247
239	t->cpu = CPU;	248	t->cpu = CPU;
240	t->ticks = us2ticks(time);	249	t->ticks = us2ticks(time);
241		250
242	t->handler = f;	251	t->handler = f;
243	t->arg = arg;	252	t->arg = arg;
244		253
245	/*	254	/*
246	* Insert t into the active timeouts list according to t->ticks.	255	* Insert t into the active timeouts list according to t->ticks.
247	*/	256	*/
248	sum = 0;	257	sum = 0;
249	l = CPU->timeout_active_head.next;	258	l = CPU->timeout_active_head.next;
250	while (l != &CPU->timeout_active_head) {	259	while (l != &CPU->timeout_active_head) {
251	hlp = list_get_instance(l, timeout_t, link);	260	hlp = list_get_instance(l, timeout_t, link);
252	spinlock_lock(&hlp->lock);	261	spinlock_lock(&hlp->lock);
253	if (t->ticks < sum + hlp->ticks) {	262	if (t->ticks < sum + hlp->ticks) {
254	spinlock_unlock(&hlp->lock);	263	spinlock_unlock(&hlp->lock);
255	break;	264	break;
256	}	265	}
257	sum += hlp->ticks;	266	sum += hlp->ticks;
258	spinlock_unlock(&hlp->lock);	267	spinlock_unlock(&hlp->lock);
259	l = l->next;	268	l = l->next;
260	}	269	}
261		270
262	m = l->prev;	271	m = l->prev;
263	list_prepend(&t->link, m); /* avoid using l->prev */	272	list_prepend(&t->link, m); /* avoid using l->prev */
264		273
265	/*	274	/*
266	* Adjust t->ticks according to ticks accumulated in h's predecessors.	275	* Adjust t->ticks according to ticks accumulated in h's predecessors.
267	*/	276	*/
268	t->ticks -= sum;	277	t->ticks -= sum;
269		278
270	/*	279	/*
271	* Decrease ticks of t's immediate succesor by t->ticks.	280	* Decrease ticks of t's immediate succesor by t->ticks.
272	*/	281	*/
273	if (l != &CPU->timeout_active_head) {	282	if (l != &CPU->timeout_active_head) {
274	spinlock_lock(&hlp->lock);	283	spinlock_lock(&hlp->lock);
275	hlp->ticks -= t->ticks;	284	hlp->ticks -= t->ticks;
276	spinlock_unlock(&hlp->lock);	285	spinlock_unlock(&hlp->lock);
277	}	286	}
278		287
279	spinlock_unlock(&t->lock);	288	spinlock_unlock(&t->lock);
280	spinlock_unlock(&CPU->timeoutlock);	289	spinlock_unlock(&CPU->timeoutlock);
281	interrupts_restore(ipl);	290	interrupts_restore(ipl);
282	}	291	}
283		292
284		293
285	/** Unregister timeout	294	/** Unregister timeout
286	*	295	*
287	* Remove timeout from timeout list.	296	* Remove timeout from timeout list.
288	*	297	*
289	* @param t Timeout to unregister.	298	* @param t Timeout to unregister.
290	*	299	*
291	* @return true on success, false on failure.	300	* @return true on success, false on failure.
292	*/	301	*/
293	bool timeout_unregister(timeout_t *t)	302	bool timeout_unregister(timeout_t *t)
294	{	303	{
295	timeout_t *hlp;	304	timeout_t *hlp;
296	link_t *l;	305	link_t *l;
297	ipl_t ipl;	306	ipl_t ipl;
298		307
299	grab_locks:	308	grab_locks:
300	ipl = interrupts_disable();	309	ipl = interrupts_disable();
301	spinlock_lock(&t->lock);	310	spinlock_lock(&t->lock);
302	if (!t->cpu) {	311	if (!t->cpu) {
303	spinlock_unlock(&t->lock);	312	spinlock_unlock(&t->lock);
304	interrupts_restore(ipl);	313	interrupts_restore(ipl);
305	return false;	314	return false;
306	}	315	}
307	if (!spinlock_trylock(&t->cpu->timeoutlock)) {	316	if (!spinlock_trylock(&t->cpu->timeoutlock)) {
308	spinlock_unlock(&t->lock);	317	spinlock_unlock(&t->lock);
309	interrupts_restore(ipl);	318	interrupts_restore(ipl);
310	goto grab_locks;	319	goto grab_locks;
311	}	320	}
312		321
313	/*	322	/*
314	* Now we know for sure that t hasn't been activated yet	323	* Now we know for sure that t hasn't been activated yet
315	* and is lurking in t->cpu->timeout_active_head queue.	324	* and is lurking in t->cpu->timeout_active_head queue.
316	*/	325	*/
317		326
318	l = t->link.next;	327	l = t->link.next;
319	if (l != &t->cpu->timeout_active_head) {	328	if (l != &t->cpu->timeout_active_head) {
320	hlp = list_get_instance(l, timeout_t, link);	329	hlp = list_get_instance(l, timeout_t, link);
321	spinlock_lock(&hlp->lock);	330	spinlock_lock(&hlp->lock);
322	hlp->ticks += t->ticks;	331	hlp->ticks += t->ticks;
323	spinlock_unlock(&hlp->lock);	332	spinlock_unlock(&hlp->lock);
324	}	333	}
325		334
326	list_remove(&t->link);	335	list_remove(&t->link);
327	spinlock_unlock(&t->cpu->timeoutlock);	336	spinlock_unlock(&t->cpu->timeoutlock);
328		337
329	timeout_reinitialize(t);	338	timeout_reinitialize(t);
330	spinlock_unlock(&t->lock);	339	spinlock_unlock(&t->lock);
331		340
332	interrupts_restore(ipl);	341	interrupts_restore(ipl);
333	return true;	342	return true;
334	}	343	}
335		344
336	#endif	345	#endif
337	/** @}	346	/** @}
338	*/	347	*/
339		348

Subversion Repositories HelenOS

(root)/branches/rcu/kernel/generic/src/time/timeout.c @ 2336 – Rev 2450 → 2461