WebSVN – HelenOS-historic – Diff – /uspace/trunk/libc/generic/psthread.c


/*
 * Copyright (C) 2006 Ondrej Palkovsky
 * 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 <libadt/list.h>
#include <psthread.h>
#include <malloc.h>
#include <unistd.h>
#include <thread.h>
#include <stdio.h>
#include <kernel/arch/faddr.h>
#include <futex.h>
#include <assert.h>
#include <async.h>
 
#ifndef PSTHREAD_INITIAL_STACK_PAGES_NO
#define PSTHREAD_INITIAL_STACK_PAGES_NO 1
#endif
 
static LIST_INITIALIZE(ready_list);
static LIST_INITIALIZE(manager_list);
 
static void psthread_exit(void) __attribute__ ((noinline));
static void psthread_main(void);
 
static atomic_t psthread_futex = FUTEX_INITIALIZER;
 
/** Setup PSthread information into TCB structure */
psthread_data_t * psthread_setup()
{
    psthread_data_t *pt;
    tcb_t *tcb;
 
    tcb = __make_tls();
    if (!tcb)
        return NULL;
 
    pt = malloc(sizeof(*pt));
    if (!pt) {
        __free_tls(tcb);
        return NULL;
    }
 
    tcb->pst_data = pt;
    pt->tcb = tcb;
 
    return pt;
}
 
void psthread_teardown(psthread_data_t *pt)
{
    __free_tls(pt->tcb);
    free(pt);
}
 
/** Function to preempt to other pseudo thread without adding
 * currently running pseudo thread to ready_list.
 */
void psthread_exit(void)
{
    psthread_data_t *pt;
 
    futex_down(&psthread_futex);
 
    if (!list_empty(&ready_list))
        pt = list_get_instance(ready_list.next, psthread_data_t, link);
    else if (!list_empty(&manager_list))
        pt = list_get_instance(manager_list.next, psthread_data_t, link);
    else {
        printf("Cannot find suitable psthread to run.\n");
        _exit(0);
    }
    list_remove(&pt->link);
    futex_up(&psthread_futex);
 
    context_restore(&pt->ctx);
    /* Never reached */
}
 
/** Function that is called on entry to new uspace thread */
void psthread_main(void)
{
    psthread_data_t *pt = __tcb_get()->pst_data;
 
    pt->retval = pt->func(pt->arg);
 
    pt->finished = 1;
    if (pt->waiter)
        list_append(&pt->waiter->link, &ready_list);
 
    psthread_exit();
}
 
/** Schedule next userspace pseudo thread.
 *
 * @param tomanager If true, we are switching to next ready manager thread
 *                  (if none is found, thread is exited)
 * @param frommanager If true, we are switching from manager thread
 * @return 0 if there is no ready pseudo thread, 1 otherwise.
 */
int psthread_schedule_next_adv(pschange_type ctype)
{
    psthread_data_t *pt;
    int retval = 0;
   
    futex_down(&psthread_futex);
 
    if (ctype == PS_PREEMPT && list_empty(&ready_list))
        goto ret_0;
 
    if (ctype == PS_FROM_MANAGER && list_empty(&ready_list)) {
        goto ret_0;
    }
    /* If we are going to manager and none exists, create it */
    if (ctype == PS_TO_MANAGER && list_empty(&manager_list))
        async_create_manager();
 
    pt = __tcb_get()->pst_data;
    if (!context_save(&pt->ctx))
        return 1; // futex_up already done here
 
    if (ctype == PS_PREEMPT)
        list_append(&pt->link, &ready_list);
    else if (ctype == PS_FROM_MANAGER)
        list_append(&pt->link, &manager_list);
   
    if (ctype == PS_TO_MANAGER)
        pt = list_get_instance(manager_list.next,psthread_data_t, link);
    else
        pt = list_get_instance(ready_list.next, psthread_data_t, link);
    list_remove(&pt->link);
 
    futex_up(&psthread_futex);
    context_restore(&pt->ctx);
 
ret_0:
    futex_up(&psthread_futex);
    return retval;
}
 
/** Wait for uspace pseudo thread to finish.
 *
 * @param psthrid Pseudo thread to wait for.
 *
 * @return Value returned by the finished thread.
 */
int psthread_join(pstid_t psthrid)
{
    volatile psthread_data_t *pt, *mypt;
    volatile int retval;
 
    /* Handle psthrid = Kernel address -> it is wait for call */
    pt = (psthread_data_t *) psthrid;
 
    if (!pt->finished) {
        mypt = __tcb_get()->pst_data;
        if (context_save(&((psthread_data_t *) mypt)->ctx)) {
            pt->waiter = (psthread_data_t *) mypt;
            psthread_exit();
        }
    }
    retval = pt->retval;
 
    free(pt->stack);
    psthread_teardown((void *)pt);
 
    return retval;
}
 
/**
 * Create a userspace thread
 *
 * @param func Pseudo thread function.
 * @param arg Argument to pass to func.
 *
 * @return 0 on failure, TLS of the new pseudo thread.
 */
pstid_t psthread_create(int (*func)(void *), void *arg)
{
    psthread_data_t *pt;
 
    pt = psthread_setup();
    if (!pt)
        return 0;
    pt->stack = (char *) malloc(PSTHREAD_INITIAL_STACK_PAGES_NO*getpagesize());
 
    if (!pt->stack) {
        psthread_teardown(pt);
        return 0;
    }
 
    pt->arg= arg;
    pt->func = func;
    pt->finished = 0;
    pt->waiter = NULL;
 
    context_save(&pt->ctx);
    context_set(&pt->ctx, FADDR(psthread_main), pt->stack, PSTHREAD_INITIAL_STACK_PAGES_NO*getpagesize(),
            pt->tcb);
 
    return (pstid_t )pt;
}
 
/** Add a thread to ready list */
void psthread_add_ready(pstid_t psthrid)
{
    psthread_data_t *pt;
 
    pt = (psthread_data_t *) psthrid;
    futex_down(&psthread_futex);
    list_append(&pt->link, &ready_list);
    futex_up(&psthread_futex);
}
 
/** Add a thread to manager list */
void psthread_add_manager(pstid_t psthrid)
{
    psthread_data_t *pt;
 
    pt = (psthread_data_t *) psthrid;
 
    futex_down(&psthread_futex);
    list_append(&pt->link, &manager_list);
    futex_up(&psthread_futex);
}
 
/** Remove one manager from manager list */
void psthread_remove_manager()
{
    futex_down(&psthread_futex);
    if (list_empty(&manager_list)) {
 
        futex_up(&psthread_futex);
        return;
    }
    list_remove(manager_list.next);
    futex_up(&psthread_futex);
}
 

Rev 1392	Rev 1407
1	/*	1	/*
2	* Copyright (C) 2006 Ondrej Palkovsky	2	* Copyright (C) 2006 Ondrej Palkovsky
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 <libadt/list.h>	29	#include <libadt/list.h>
30	#include <psthread.h>	30	#include <psthread.h>
31	#include <malloc.h>	31	#include <malloc.h>
32	#include <unistd.h>	32	#include <unistd.h>
33	#include <thread.h>	33	#include <thread.h>
34	#include <stdio.h>	34	#include <stdio.h>
35	#include <kernel/arch/faddr.h>	35	#include <kernel/arch/faddr.h>
36	#include <futex.h>	36	#include <futex.h>
37	#include <assert.h>	37	#include <assert.h>
-		38	#include <async.h>
38		39
39	#ifndef PSTHREAD_INITIAL_STACK_PAGES_NO	40	#ifndef PSTHREAD_INITIAL_STACK_PAGES_NO
40	#define PSTHREAD_INITIAL_STACK_PAGES_NO 1	41	#define PSTHREAD_INITIAL_STACK_PAGES_NO 1
41	#endif	42	#endif
42		43
43	static LIST_INITIALIZE(ready_list);	44	static LIST_INITIALIZE(ready_list);
44	static LIST_INITIALIZE(manager_list);	45	static LIST_INITIALIZE(manager_list);
45		46
46	static void psthread_exit(void) __attribute__ ((noinline));	47	static void psthread_exit(void) __attribute__ ((noinline));
47	static void psthread_main(void);	48	static void psthread_main(void);
48		49
49	static atomic_t psthread_futex = FUTEX_INITIALIZER;	50	static atomic_t psthread_futex = FUTEX_INITIALIZER;
50		51
51	/** Setup PSthread information into TCB structure */	52	/** Setup PSthread information into TCB structure */
52	psthread_data_t * psthread_setup()	53	psthread_data_t * psthread_setup()
53	{	54	{
54	psthread_data_t *pt;	55	psthread_data_t *pt;
55	tcb_t *tcb;	56	tcb_t *tcb;
56		57
57	tcb = __make_tls();	58	tcb = __make_tls();
58	if (!tcb)	59	if (!tcb)
59	return NULL;	60	return NULL;
60		61
61	pt = malloc(sizeof(*pt));	62	pt = malloc(sizeof(*pt));
62	if (!pt) {	63	if (!pt) {
63	__free_tls(tcb);	64	__free_tls(tcb);
64	return NULL;	65	return NULL;
65	}	66	}
66		67
67	tcb->pst_data = pt;	68	tcb->pst_data = pt;
68	pt->tcb = tcb;	69	pt->tcb = tcb;
69		70
70	return pt;	71	return pt;
71	}	72	}
72		73
73	void psthread_teardown(psthread_data_t *pt)	74	void psthread_teardown(psthread_data_t *pt)
74	{	75	{
75	__free_tls(pt->tcb);	76	__free_tls(pt->tcb);
76	free(pt);	77	free(pt);
77	}	78	}
78		79
79	/** Function to preempt to other pseudo thread without adding	80	/** Function to preempt to other pseudo thread without adding
80	* currently running pseudo thread to ready_list.	81	* currently running pseudo thread to ready_list.
81	*/	82	*/
82	void psthread_exit(void)	83	void psthread_exit(void)
83	{	84	{
84	psthread_data_t *pt;	85	psthread_data_t *pt;
85		86
86	futex_down(&psthread_futex);	87	futex_down(&psthread_futex);
87		88
88	if (!list_empty(&ready_list))	89	if (!list_empty(&ready_list))
89	pt = list_get_instance(ready_list.next, psthread_data_t, link);	90	pt = list_get_instance(ready_list.next, psthread_data_t, link);
90	else if (!list_empty(&manager_list))	91	else if (!list_empty(&manager_list))
91	pt = list_get_instance(manager_list.next, psthread_data_t, link);	92	pt = list_get_instance(manager_list.next, psthread_data_t, link);
92	else {	93	else {
93	printf("Cannot find suitable psthread to run.\n");	94	printf("Cannot find suitable psthread to run.\n");
94	_exit(0);	95	_exit(0);
95	}	96	}
96	list_remove(&pt->link);	97	list_remove(&pt->link);
97	futex_up(&psthread_futex);	98	futex_up(&psthread_futex);
98		99
99	context_restore(&pt->ctx);	100	context_restore(&pt->ctx);
100	/* Never reached */	101	/* Never reached */
101	}	102	}
102		103
103	/** Function that is called on entry to new uspace thread */	104	/** Function that is called on entry to new uspace thread */
104	void psthread_main(void)	105	void psthread_main(void)
105	{	106	{
106	psthread_data_t *pt = __tcb_get()->pst_data;	107	psthread_data_t *pt = __tcb_get()->pst_data;
107		108
108	pt->retval = pt->func(pt->arg);	109	pt->retval = pt->func(pt->arg);
109		110
110	pt->finished = 1;	111	pt->finished = 1;
111	if (pt->waiter)	112	if (pt->waiter)
112	list_append(&pt->waiter->link, &ready_list);	113	list_append(&pt->waiter->link, &ready_list);
113		114
114	psthread_exit();	115	psthread_exit();
115	}	116	}
116		117
117	/** Schedule next userspace pseudo thread.	118	/** Schedule next userspace pseudo thread.
118	*	119	*
119	* @param tomanager If true, we are switching to next ready manager thread	120	* @param tomanager If true, we are switching to next ready manager thread
120	* (if none is found, thread is exited)	121	* (if none is found, thread is exited)
121	* @param frommanager If true, we are switching from manager thread	122	* @param frommanager If true, we are switching from manager thread
122	* @return 0 if there is no ready pseudo thread, 1 otherwise.	123	* @return 0 if there is no ready pseudo thread, 1 otherwise.
123	*/	124	*/
124	int psthread_schedule_next_adv(pschange_type ctype)	125	int psthread_schedule_next_adv(pschange_type ctype)
125	{	126	{
126	psthread_data_t *pt;	127	psthread_data_t *pt;
127	int retval = 0;	128	int retval = 0;
128		129
129	futex_down(&psthread_futex);	130	futex_down(&psthread_futex);
130		131
131	if (ctype == PS_PREEMPT && list_empty(&ready_list))	132	if (ctype == PS_PREEMPT && list_empty(&ready_list))
132	goto ret_0;	133	goto ret_0;
133		134
134	if (ctype == PS_FROM_MANAGER && list_empty(&ready_list)) {	135	if (ctype == PS_FROM_MANAGER && list_empty(&ready_list)) {
135	goto ret_0;	136	goto ret_0;
136	}	137	}
-		138	/* If we are going to manager and none exists, create it */
137	assert(!(ctype == PS_TO_MANAGER && list_empty(&manager_list)));	139	if (ctype == PS_TO_MANAGER && list_empty(&manager_list))
-		140	async_create_manager();
138		141
139	pt = __tcb_get()->pst_data;	142	pt = __tcb_get()->pst_data;
140	if (!context_save(&pt->ctx))	143	if (!context_save(&pt->ctx))
141	return 1; // futex_up already done here	144	return 1; // futex_up already done here
142		145
143	if (ctype == PS_PREEMPT)	146	if (ctype == PS_PREEMPT)
144	list_append(&pt->link, &ready_list);	147	list_append(&pt->link, &ready_list);
145	else if (ctype == PS_FROM_MANAGER)	148	else if (ctype == PS_FROM_MANAGER)
146	list_append(&pt->link, &manager_list);	149	list_append(&pt->link, &manager_list);
147		150
148	if (ctype == PS_TO_MANAGER)	151	if (ctype == PS_TO_MANAGER)
149	pt = list_get_instance(manager_list.next,psthread_data_t, link);	152	pt = list_get_instance(manager_list.next,psthread_data_t, link);
150	else	153	else
151	pt = list_get_instance(ready_list.next, psthread_data_t, link);	154	pt = list_get_instance(ready_list.next, psthread_data_t, link);
152	list_remove(&pt->link);	155	list_remove(&pt->link);
153		156
154	futex_up(&psthread_futex);	157	futex_up(&psthread_futex);
155	context_restore(&pt->ctx);	158	context_restore(&pt->ctx);
156		159
157	ret_0:	160	ret_0:
158	futex_up(&psthread_futex);	161	futex_up(&psthread_futex);
159	return retval;	162	return retval;
160	}	163	}
161		164
162	/** Wait for uspace pseudo thread to finish.	165	/** Wait for uspace pseudo thread to finish.
163	*	166	*
164	* @param psthrid Pseudo thread to wait for.	167	* @param psthrid Pseudo thread to wait for.
165	*	168	*
166	* @return Value returned by the finished thread.	169	* @return Value returned by the finished thread.
167	*/	170	*/
168	int psthread_join(pstid_t psthrid)	171	int psthread_join(pstid_t psthrid)
169	{	172	{
170	volatile psthread_data_t pt, mypt;	173	volatile psthread_data_t pt, mypt;
171	volatile int retval;	174	volatile int retval;
172		175
173	/* Handle psthrid = Kernel address -> it is wait for call */	176	/* Handle psthrid = Kernel address -> it is wait for call */
174	pt = (psthread_data_t *) psthrid;	177	pt = (psthread_data_t *) psthrid;
175		178
176	if (!pt->finished) {	179	if (!pt->finished) {
177	mypt = __tcb_get()->pst_data;	180	mypt = __tcb_get()->pst_data;
178	if (context_save(&((psthread_data_t *) mypt)->ctx)) {	181	if (context_save(&((psthread_data_t *) mypt)->ctx)) {
179	pt->waiter = (psthread_data_t *) mypt;	182	pt->waiter = (psthread_data_t *) mypt;
180	psthread_exit();	183	psthread_exit();
181	}	184	}
182	}	185	}
183	retval = pt->retval;	186	retval = pt->retval;
184		187
185	free(pt->stack);	188	free(pt->stack);
186	psthread_teardown((void *)pt);	189	psthread_teardown((void *)pt);
187		190
188	return retval;	191	return retval;
189	}	192	}
190		193
191	/**	194	/**
192	* Create a userspace thread	195	* Create a userspace thread
193	*	196	*
194	* @param func Pseudo thread function.	197	* @param func Pseudo thread function.
195	* @param arg Argument to pass to func.	198	* @param arg Argument to pass to func.
196	*	199	*
197	* @return 0 on failure, TLS of the new pseudo thread.	200	* @return 0 on failure, TLS of the new pseudo thread.
198	*/	201	*/
199	pstid_t psthread_create(int (func)(void ), void *arg)	202	pstid_t psthread_create(int (func)(void ), void *arg)
200	{	203	{
201	psthread_data_t *pt;	204	psthread_data_t *pt;
202		205
203	pt = psthread_setup();	206	pt = psthread_setup();
204	if (!pt)	207	if (!pt)
205	return 0;	208	return 0;
206	pt->stack = (char ) malloc(PSTHREAD_INITIAL_STACK_PAGES_NOgetpagesize());	209	pt->stack = (char ) malloc(PSTHREAD_INITIAL_STACK_PAGES_NOgetpagesize());
207		210
208	if (!pt->stack) {	211	if (!pt->stack) {
209	psthread_teardown(pt);	212	psthread_teardown(pt);
210	return 0;	213	return 0;
211	}	214	}
212		215
213	pt->arg= arg;	216	pt->arg= arg;
214	pt->func = func;	217	pt->func = func;
215	pt->finished = 0;	218	pt->finished = 0;
216	pt->waiter = NULL;	219	pt->waiter = NULL;
217		220
218	context_save(&pt->ctx);	221	context_save(&pt->ctx);
219	context_set(&pt->ctx, FADDR(psthread_main), pt->stack, PSTHREAD_INITIAL_STACK_PAGES_NO*getpagesize(),	222	context_set(&pt->ctx, FADDR(psthread_main), pt->stack, PSTHREAD_INITIAL_STACK_PAGES_NO*getpagesize(),
220	pt->tcb);	223	pt->tcb);
221		224
222	return (pstid_t )pt;	225	return (pstid_t )pt;
223	}	226	}
224		227
225	/** Add a thread to ready list */	228	/** Add a thread to ready list */
226	void psthread_add_ready(pstid_t psthrid)	229	void psthread_add_ready(pstid_t psthrid)
227	{	230	{
228	psthread_data_t *pt;	231	psthread_data_t *pt;
229		232
230	pt = (psthread_data_t *) psthrid;	233	pt = (psthread_data_t *) psthrid;
231	futex_down(&psthread_futex);	234	futex_down(&psthread_futex);
232	list_append(&pt->link, &ready_list);	235	list_append(&pt->link, &ready_list);
233	futex_up(&psthread_futex);	236	futex_up(&psthread_futex);
234	}	237	}
235		238
236	/** Add a thread to manager list */	239	/** Add a thread to manager list */
237	void psthread_add_manager(pstid_t psthrid)	240	void psthread_add_manager(pstid_t psthrid)
238	{	241	{
239	psthread_data_t *pt;	242	psthread_data_t *pt;
240		243
241	pt = (psthread_data_t *) psthrid;	244	pt = (psthread_data_t *) psthrid;
242		245
243	futex_down(&psthread_futex);	246	futex_down(&psthread_futex);
244	list_append(&pt->link, &manager_list);	247	list_append(&pt->link, &manager_list);
245	futex_up(&psthread_futex);	248	futex_up(&psthread_futex);
246	}	249	}
247		250
248	/** Remove one manager from manager list */	251	/** Remove one manager from manager list */
249	void psthread_remove_manager()	252	void psthread_remove_manager()
250	{	253	{
251	futex_down(&psthread_futex);	254	futex_down(&psthread_futex);
252	if (list_empty(&manager_list)) {	255	if (list_empty(&manager_list)) {
253	printf("No manager found!.\n");	-
254	futex_up(&psthread_futex);	256	futex_up(&psthread_futex);
255	return;	257	return;
256	}	258	}
257	list_remove(manager_list.next);	259	list_remove(manager_list.next);
258	futex_up(&psthread_futex);	260	futex_up(&psthread_futex);
259	}	261	}
260		262

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(root)/uspace/trunk/libc/generic/psthread.c @ 1719 – Rev 1392 → 1407