WebSVN – HelenOS – Diff – /branches/dynload/uspace/lib/libc/generic/thread.c


/*
 * Copyright (c) 2006 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.
 */
 
/** @addtogroup libc
 * @{
 */
/** @file
 */
 
#include <thread.h>
#include <libc.h>
#include <stdlib.h>
#include <libarch/faddr.h>
#include <kernel/proc/uarg.h>
#include <fibril.h>
#include <string.h>
#include <async.h>
 
#ifndef THREAD_INITIAL_STACK_PAGES_NO
#define THREAD_INITIAL_STACK_PAGES_NO 1
#endif
 
/** Main thread function.
 *
 * This function is called from __thread_entry() and is used
 * to call the thread's implementing function and perform cleanup
 * and exit when thread returns back. Do not call this function
 * directly.
 *
 * @param uarg Pointer to userspace argument structure.
 */
void __thread_main(uspace_arg_t *uarg)
{
    fibril_t *f;
 
    f = fibril_setup();
    __tcb_set(f->tcb);
 
    uarg->uspace_thread_function(uarg->uspace_thread_arg);
    /* XXX: we cannot free the userspace stack while running on it */
//  free(uarg->uspace_stack);
//  free(uarg);
 
    /* If there is a manager, destroy it */
    async_destroy_manager();
    fibril_teardown(f);
 
    thread_exit(0);
}
 
/** Create userspace thread.
 *
 * This function creates new userspace thread and allocates userspace
 * stack and userspace argument structure for it.
 *
 * @param function Function implementing the thread.
 * @param arg Argument to be passed to thread.
 * @param name Symbolic name of the thread.
 * @param tid Thread ID of the newly created thread.
 *
 * @return Zero on success or a code from @ref errno.h on failure.
 */
int thread_create(void (* function)(void *), void *arg, char *name,
    thread_id_t *tid)
{
    char *stack;
    uspace_arg_t *uarg;
    int rc;
 
    stack = (char *) malloc(getpagesize() * THREAD_INITIAL_STACK_PAGES_NO);
    if (!stack)
        return -1;
       
    uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t));
    if (!uarg) {
        free(stack);
        return -1;
    }
   
    uarg->uspace_entry = (void *) FADDR(__thread_entry);
    uarg->uspace_stack = (void *) stack;
    uarg->uspace_thread_function = function;
    uarg->uspace_thread_arg = arg;
    uarg->uspace_uarg = uarg;
   
    rc = __SYSCALL4(SYS_THREAD_CREATE, (sysarg_t) uarg, (sysarg_t) name,
        (sysarg_t) str_size(name), (sysarg_t) tid);
   
    if (rc) {
        /*
         * Failed to create a new thread.
         * Free up the allocated structures.
         */
        free(uarg);
        free(stack);
    }
 
    return rc;
}
 
/** Terminate current thread.
 *
 * @param status Exit status. Currently not used.
 */
void thread_exit(int status)
{
    __SYSCALL1(SYS_THREAD_EXIT, (sysarg_t) status);
    for (;;)
        ;
}
 
/** Detach thread.
 *
 * Currently not implemented.
 *
 * @param thread TID.
 */
void thread_detach(thread_id_t thread)
{
}
 
/** Join thread.
 *
 * Currently not implemented.
 *
 * @param thread TID.
 *
 * @return Thread exit status.
 */
int thread_join(thread_id_t thread)
{
    return 0;
}
 
/** Get current thread ID.
 *
 * @return Current thread ID.
 */
thread_id_t thread_get_id(void)
{
    thread_id_t thread_id;
 
    (void) __SYSCALL1(SYS_THREAD_GET_ID, (sysarg_t) &thread_id);
 
    return thread_id;
}
 
/** @}
 */
 

Rev 3569	Rev 4348
1	/*	1	/*
2	* Copyright (c) 2006 Jakub Jermar	2	* Copyright (c) 2006 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	/** @addtogroup libc	29	/** @addtogroup libc
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#include <thread.h>	35	#include <thread.h>
36	#include <libc.h>	36	#include <libc.h>
37	#include <stdlib.h>	37	#include <stdlib.h>
38	#include <libarch/faddr.h>	38	#include <libarch/faddr.h>
39	#include <kernel/proc/uarg.h>	39	#include <kernel/proc/uarg.h>
40	#include <fibril.h>	40	#include <fibril.h>
41	#include <string.h>	41	#include <string.h>
42	#include <async.h>	42	#include <async.h>
43		43
44	#ifndef THREAD_INITIAL_STACK_PAGES_NO	44	#ifndef THREAD_INITIAL_STACK_PAGES_NO
45	#define THREAD_INITIAL_STACK_PAGES_NO 1	45	#define THREAD_INITIAL_STACK_PAGES_NO 1
46	#endif	46	#endif
47		47
48	/** Main thread function.	48	/** Main thread function.
49	*	49	*
50	* This function is called from __thread_entry() and is used	50	* This function is called from __thread_entry() and is used
51	* to call the thread's implementing function and perform cleanup	51	* to call the thread's implementing function and perform cleanup
52	* and exit when thread returns back. Do not call this function	52	* and exit when thread returns back. Do not call this function
53	* directly.	53	* directly.
54	*	54	*
55	* @param uarg Pointer to userspace argument structure.	55	* @param uarg Pointer to userspace argument structure.
56	*/	56	*/
57	void __thread_main(uspace_arg_t *uarg)	57	void __thread_main(uspace_arg_t *uarg)
58	{	58	{
59	fibril_t *f;	59	fibril_t *f;
60		60
61	f = fibril_setup();	61	f = fibril_setup();
62	__tcb_set(f->tcb);	62	__tcb_set(f->tcb);
63		63
64	uarg->uspace_thread_function(uarg->uspace_thread_arg);	64	uarg->uspace_thread_function(uarg->uspace_thread_arg);
65	/* XXX: we cannot free the userspace stack while running on it */	65	/* XXX: we cannot free the userspace stack while running on it */
66	// free(uarg->uspace_stack);	66	// free(uarg->uspace_stack);
67	// free(uarg);	67	// free(uarg);
68		68
69	/* If there is a manager, destroy it */	69	/* If there is a manager, destroy it */
70	async_destroy_manager();	70	async_destroy_manager();
71	fibril_teardown(f);	71	fibril_teardown(f);
72		72
73	thread_exit(0);	73	thread_exit(0);
74	}	74	}
75		75
76	/** Create userspace thread.	76	/** Create userspace thread.
77	*	77	*
78	* This function creates new userspace thread and allocates userspace	78	* This function creates new userspace thread and allocates userspace
79	* stack and userspace argument structure for it.	79	* stack and userspace argument structure for it.
80	*	80	*
81	* @param function Function implementing the thread.	81	* @param function Function implementing the thread.
82	* @param arg Argument to be passed to thread.	82	* @param arg Argument to be passed to thread.
83	* @param name Symbolic name of the thread.	83	* @param name Symbolic name of the thread.
84	* @param tid Thread ID of the newly created thread.	84	* @param tid Thread ID of the newly created thread.
85	*	85	*
86	* @return Zero on success or a code from @ref errno.h on failure.	86	* @return Zero on success or a code from @ref errno.h on failure.
87	*/	87	*/
88	int thread_create(void (* function)(void ), void arg, char *name,	88	int thread_create(void (* function)(void ), void arg, char *name,
89	thread_id_t *tid)	89	thread_id_t *tid)
90	{	90	{
91	char *stack;	91	char *stack;
92	uspace_arg_t *uarg;	92	uspace_arg_t *uarg;
93	int rc;	93	int rc;
94		94
95	stack = (char ) malloc(getpagesize() THREAD_INITIAL_STACK_PAGES_NO);	95	stack = (char ) malloc(getpagesize() THREAD_INITIAL_STACK_PAGES_NO);
96	if (!stack)	96	if (!stack)
97	return -1;	97	return -1;
98		98
99	uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t));	99	uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t));
100	if (!uarg) {	100	if (!uarg) {
101	free(stack);	101	free(stack);
102	return -1;	102	return -1;
103	}	103	}
104		104
105	uarg->uspace_entry = (void *) FADDR(__thread_entry);	105	uarg->uspace_entry = (void *) FADDR(__thread_entry);
106	uarg->uspace_stack = (void *) stack;	106	uarg->uspace_stack = (void *) stack;
107	uarg->uspace_thread_function = function;	107	uarg->uspace_thread_function = function;
108	uarg->uspace_thread_arg = arg;	108	uarg->uspace_thread_arg = arg;
109	uarg->uspace_uarg = uarg;	109	uarg->uspace_uarg = uarg;
110		110
111	rc = __SYSCALL4(SYS_THREAD_CREATE, (sysarg_t) uarg, (sysarg_t) name,	111	rc = __SYSCALL4(SYS_THREAD_CREATE, (sysarg_t) uarg, (sysarg_t) name,
112	(sysarg_t) strlen(name), (sysarg_t) tid);	112	(sysarg_t) str_size(name), (sysarg_t) tid);
113		113
114	if (rc) {	114	if (rc) {
115	/*	115	/*
116	* Failed to create a new thread.	116	* Failed to create a new thread.
117	* Free up the allocated structures.	117	* Free up the allocated structures.
118	*/	118	*/
119	free(uarg);	119	free(uarg);
120	free(stack);	120	free(stack);
121	}	121	}
122		122
123	return rc;	123	return rc;
124	}	124	}
125		125
126	/** Terminate current thread.	126	/** Terminate current thread.
127	*	127	*
128	* @param status Exit status. Currently not used.	128	* @param status Exit status. Currently not used.
129	*/	129	*/
130	void thread_exit(int status)	130	void thread_exit(int status)
131	{	131	{
132	__SYSCALL1(SYS_THREAD_EXIT, (sysarg_t) status);	132	__SYSCALL1(SYS_THREAD_EXIT, (sysarg_t) status);
-		133	for (;;)
-		134	;
133	}	135	}
134		136
135	/** Detach thread.	137	/** Detach thread.
136	*	138	*
137	* Currently not implemented.	139	* Currently not implemented.
138	*	140	*
139	* @param thread TID.	141	* @param thread TID.
140	*/	142	*/
141	void thread_detach(thread_id_t thread)	143	void thread_detach(thread_id_t thread)
142	{	144	{
143	}	145	}
144		146
145	/** Join thread.	147	/** Join thread.
146	*	148	*
147	* Currently not implemented.	149	* Currently not implemented.
148	*	150	*
149	* @param thread TID.	151	* @param thread TID.
150	*	152	*
151	* @return Thread exit status.	153	* @return Thread exit status.
152	*/	154	*/
153	int thread_join(thread_id_t thread)	155	int thread_join(thread_id_t thread)
154	{	156	{
-		157	return 0;
155	}	158	}
156		159
157	/** Get current thread ID.	160	/** Get current thread ID.
158	*	161	*
159	* @return Current thread ID.	162	* @return Current thread ID.
160	*/	163	*/
161	thread_id_t thread_get_id(void)	164	thread_id_t thread_get_id(void)
162	{	165	{
163	thread_id_t thread_id;	166	thread_id_t thread_id;
164		167
165	(void) __SYSCALL1(SYS_THREAD_GET_ID, (sysarg_t) &thread_id);	168	(void) __SYSCALL1(SYS_THREAD_GET_ID, (sysarg_t) &thread_id);
166		169
167	return thread_id;	170	return thread_id;
168	}	171	}
169		172
170	/** @}	173	/** @}
171	*/	174	*/
172		175

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(root)/branches/dynload/uspace/lib/libc/generic/thread.c – Rev 3569 → 4348