1 | /** |
---|
2 | * @file |
---|
3 | * |
---|
4 | * @ingroup rtems_bsd_rtems |
---|
5 | * |
---|
6 | * @brief TODO. |
---|
7 | */ |
---|
8 | |
---|
9 | /* |
---|
10 | * Copyright (c) 2009-2013 embedded brains GmbH. All rights reserved. |
---|
11 | * |
---|
12 | * embedded brains GmbH |
---|
13 | * Dornierstr. 4 |
---|
14 | * 82178 Puchheim |
---|
15 | * Germany |
---|
16 | * <rtems@embedded-brains.de> |
---|
17 | * |
---|
18 | * Redistribution and use in source and binary forms, with or without |
---|
19 | * modification, are permitted provided that the following conditions |
---|
20 | * are met: |
---|
21 | * 1. Redistributions of source code must retain the above copyright |
---|
22 | * notice, this list of conditions and the following disclaimer. |
---|
23 | * 2. Redistributions in binary form must reproduce the above copyright |
---|
24 | * notice, this list of conditions and the following disclaimer in the |
---|
25 | * documentation and/or other materials provided with the distribution. |
---|
26 | * |
---|
27 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND |
---|
28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
---|
29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
---|
30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
---|
31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
---|
32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
---|
33 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
---|
34 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
---|
35 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
---|
36 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
---|
37 | * SUCH DAMAGE. |
---|
38 | */ |
---|
39 | |
---|
40 | #include <machine/rtems-bsd-config.h> |
---|
41 | #include <machine/rtems-bsd-thread.h> |
---|
42 | |
---|
43 | #include <rtems/bsd/sys/param.h> |
---|
44 | #include <rtems/bsd/sys/types.h> |
---|
45 | #include <sys/systm.h> |
---|
46 | #include <sys/kernel.h> |
---|
47 | #include <sys/proc.h> |
---|
48 | #include <sys/kthread.h> |
---|
49 | #include <sys/malloc.h> |
---|
50 | #include <sys/selinfo.h> |
---|
51 | |
---|
52 | #include <rtems/score/threadimpl.h> |
---|
53 | #include <rtems/score/objectimpl.h> |
---|
54 | |
---|
55 | RTEMS_CHAIN_DEFINE_EMPTY(rtems_bsd_thread_chain); |
---|
56 | |
---|
57 | static size_t rtems_bsd_extension_index; |
---|
58 | |
---|
59 | struct thread * |
---|
60 | rtems_bsd_get_thread(const Thread_Control *thread) |
---|
61 | { |
---|
62 | return thread->extensions[rtems_bsd_extension_index]; |
---|
63 | } |
---|
64 | |
---|
65 | static struct thread * |
---|
66 | rtems_bsd_get_thread_by_id(rtems_id task_id) |
---|
67 | { |
---|
68 | struct thread *td = NULL; |
---|
69 | Thread_Control *thread; |
---|
70 | Objects_Locations location; |
---|
71 | |
---|
72 | thread = _Thread_Get(task_id, &location); |
---|
73 | switch (location) { |
---|
74 | case OBJECTS_LOCAL: |
---|
75 | td = rtems_bsd_get_thread(thread); |
---|
76 | _Objects_Put(&thread->Object); |
---|
77 | break; |
---|
78 | #if defined(RTEMS_MULTIPROCESSING) |
---|
79 | case OBJECTS_REMOTE: |
---|
80 | _Thread_Dispatch(); |
---|
81 | break; |
---|
82 | #endif |
---|
83 | default: |
---|
84 | break; |
---|
85 | } |
---|
86 | |
---|
87 | return td; |
---|
88 | } |
---|
89 | |
---|
90 | struct thread * |
---|
91 | rtems_bsd_thread_create(Thread_Control *thread, int wait) |
---|
92 | { |
---|
93 | struct thread *td = malloc(sizeof(*td), M_TEMP, M_ZERO | wait); |
---|
94 | |
---|
95 | if (td != NULL) { |
---|
96 | td->td_thread = thread; |
---|
97 | } |
---|
98 | |
---|
99 | thread->extensions[rtems_bsd_extension_index] = td; |
---|
100 | |
---|
101 | return td; |
---|
102 | } |
---|
103 | |
---|
104 | static struct thread * |
---|
105 | rtems_bsd_get_curthread(int wait) |
---|
106 | { |
---|
107 | Thread_Control *executing = _Thread_Get_executing(); |
---|
108 | struct thread *td = rtems_bsd_get_thread(executing); |
---|
109 | |
---|
110 | if (td == NULL) { |
---|
111 | td = rtems_bsd_thread_create(executing, wait); |
---|
112 | } |
---|
113 | |
---|
114 | return td; |
---|
115 | } |
---|
116 | |
---|
117 | struct thread * |
---|
118 | rtems_bsd_get_curthread_or_wait_forever(void) |
---|
119 | { |
---|
120 | return rtems_bsd_get_curthread(M_WAITOK); |
---|
121 | } |
---|
122 | |
---|
123 | struct thread * |
---|
124 | rtems_bsd_get_curthread_or_null(void) |
---|
125 | { |
---|
126 | return rtems_bsd_get_curthread(0); |
---|
127 | } |
---|
128 | |
---|
129 | static bool |
---|
130 | rtems_bsd_is_bsd_thread(Thread_Control *thread) |
---|
131 | { |
---|
132 | return thread->Object.name.name_u32 == BSD_TASK_NAME; |
---|
133 | } |
---|
134 | |
---|
135 | static bool |
---|
136 | rtems_bsd_extension_thread_create( |
---|
137 | Thread_Control *executing, |
---|
138 | Thread_Control *created |
---|
139 | ) |
---|
140 | { |
---|
141 | bool ok = true; |
---|
142 | |
---|
143 | if (rtems_bsd_is_bsd_thread(created)) { |
---|
144 | struct thread *td = rtems_bsd_thread_create(created, 0); |
---|
145 | |
---|
146 | ok = td != NULL; |
---|
147 | if (ok) { |
---|
148 | rtems_chain_append(&rtems_bsd_thread_chain, &td->td_node); |
---|
149 | } |
---|
150 | } |
---|
151 | |
---|
152 | return ok; |
---|
153 | } |
---|
154 | |
---|
155 | static void |
---|
156 | rtems_bsd_extension_thread_delete( |
---|
157 | Thread_Control *executing, |
---|
158 | Thread_Control *deleted |
---|
159 | ) |
---|
160 | { |
---|
161 | struct thread *td = rtems_bsd_get_thread(deleted); |
---|
162 | |
---|
163 | if (td != NULL) { |
---|
164 | seltdfini(td); |
---|
165 | |
---|
166 | if (rtems_bsd_is_bsd_thread(deleted)) { |
---|
167 | rtems_chain_explicit_extract(&rtems_bsd_thread_chain, &td->td_node); |
---|
168 | } |
---|
169 | |
---|
170 | free(td, M_TEMP); |
---|
171 | } |
---|
172 | } |
---|
173 | |
---|
174 | static const rtems_extensions_table rtems_bsd_extensions = { |
---|
175 | .thread_create = rtems_bsd_extension_thread_create, |
---|
176 | .thread_delete = rtems_bsd_extension_thread_delete |
---|
177 | }; |
---|
178 | |
---|
179 | static void |
---|
180 | rtems_bsd_threads_init(void *arg __unused) |
---|
181 | { |
---|
182 | rtems_id ext_id; |
---|
183 | rtems_status_code sc; |
---|
184 | |
---|
185 | sc = rtems_extension_create( |
---|
186 | BSD_TASK_NAME, |
---|
187 | &rtems_bsd_extensions, |
---|
188 | &ext_id |
---|
189 | ); |
---|
190 | if (sc != RTEMS_SUCCESSFUL) { |
---|
191 | BSD_PANIC("cannot create extension"); |
---|
192 | } |
---|
193 | |
---|
194 | rtems_bsd_extension_index = rtems_object_id_get_index(ext_id); |
---|
195 | } |
---|
196 | |
---|
197 | SYSINIT(rtems_bsd_threads, SI_SUB_INTRINSIC, SI_ORDER_ANY, rtems_bsd_threads_init, NULL); |
---|
198 | |
---|
199 | static int |
---|
200 | rtems_bsd_thread_start(struct thread **td_ptr, void (*func)(void *), void *arg, int flags, int pages, const char *fmt, va_list ap) |
---|
201 | { |
---|
202 | int eno = 0; |
---|
203 | rtems_status_code sc; |
---|
204 | rtems_id task_id; |
---|
205 | |
---|
206 | BSD_ASSERT(pages >= 0); |
---|
207 | |
---|
208 | sc = rtems_task_create( |
---|
209 | BSD_TASK_NAME, |
---|
210 | BSD_TASK_PRIORITY_NORMAL, |
---|
211 | BSD_MINIMUM_TASK_STACK_SIZE + (size_t) pages * PAGE_SIZE, |
---|
212 | RTEMS_DEFAULT_ATTRIBUTES, |
---|
213 | RTEMS_DEFAULT_ATTRIBUTES, |
---|
214 | &task_id |
---|
215 | ); |
---|
216 | if (sc == RTEMS_SUCCESSFUL) { |
---|
217 | struct thread *td = rtems_bsd_get_thread_by_id(task_id); |
---|
218 | |
---|
219 | BSD_ASSERT(td != NULL); |
---|
220 | |
---|
221 | vsnprintf(td->td_name, sizeof(td->td_name), fmt, ap); |
---|
222 | |
---|
223 | sc = rtems_task_start(task_id, (rtems_task_entry) func, (rtems_task_argument) arg); |
---|
224 | BSD_ASSERT(sc == RTEMS_SUCCESSFUL); |
---|
225 | |
---|
226 | if (td_ptr != NULL) { |
---|
227 | *td_ptr = td; |
---|
228 | } |
---|
229 | } else { |
---|
230 | eno = ENOMEM; |
---|
231 | } |
---|
232 | |
---|
233 | return eno; |
---|
234 | } |
---|
235 | |
---|
236 | static __dead2 void |
---|
237 | rtems_bsd_thread_delete(void) |
---|
238 | { |
---|
239 | rtems_task_delete(RTEMS_SELF); |
---|
240 | BSD_PANIC("delete self failed"); |
---|
241 | } |
---|
242 | |
---|
243 | void |
---|
244 | kproc_start(const void *udata) |
---|
245 | { |
---|
246 | const struct kproc_desc *pd = udata; |
---|
247 | int eno = kproc_create((void (*)(void *))pd->func, NULL, pd->global_procpp, 0, 0, "%s", pd->arg0); |
---|
248 | |
---|
249 | BSD_ASSERT(eno == 0); |
---|
250 | } |
---|
251 | |
---|
252 | int |
---|
253 | kproc_create(void (*func)(void *), void *arg, struct proc **newpp, int flags, int pages, const char *fmt, ...) |
---|
254 | { |
---|
255 | int eno = 0; |
---|
256 | va_list ap; |
---|
257 | |
---|
258 | va_start(ap, fmt); |
---|
259 | eno = rtems_bsd_thread_start(newpp, func, arg, flags, pages, fmt, ap); |
---|
260 | va_end(ap); |
---|
261 | |
---|
262 | return eno; |
---|
263 | } |
---|
264 | |
---|
265 | void |
---|
266 | kproc_exit(int ecode) |
---|
267 | { |
---|
268 | rtems_bsd_thread_delete(); |
---|
269 | } |
---|
270 | |
---|
271 | void |
---|
272 | kthread_start(const void *udata) |
---|
273 | { |
---|
274 | const struct kthread_desc *td = udata; |
---|
275 | int eno = kthread_add((void (*)(void *)) td->func, NULL, NULL, td->global_threadpp, 0, 0, "%s", td->arg0); |
---|
276 | |
---|
277 | BSD_ASSERT(eno == 0); |
---|
278 | } |
---|
279 | |
---|
280 | int |
---|
281 | kthread_add(void (*func)(void *), void *arg, struct proc *p, struct thread **newtdp, int flags, int pages, const char *fmt, ...) |
---|
282 | { |
---|
283 | int eno = 0; |
---|
284 | va_list ap; |
---|
285 | |
---|
286 | va_start(ap, fmt); |
---|
287 | eno = rtems_bsd_thread_start(newtdp, func, arg, flags, pages, fmt, ap); |
---|
288 | va_end(ap); |
---|
289 | |
---|
290 | return eno; |
---|
291 | } |
---|
292 | |
---|
293 | void |
---|
294 | kthread_exit(void) |
---|
295 | { |
---|
296 | rtems_bsd_thread_delete(); |
---|
297 | } |
---|
298 | |
---|
299 | int |
---|
300 | kproc_kthread_add(void (*func)(void *), void *arg, struct proc **procptr, struct thread **tdptr, int flags, int pages, const char * procname, const char *fmt, ...) |
---|
301 | { |
---|
302 | int eno = 0; |
---|
303 | va_list ap; |
---|
304 | |
---|
305 | va_start(ap, fmt); |
---|
306 | eno = rtems_bsd_thread_start(tdptr, func, arg, flags, pages, fmt, ap); |
---|
307 | va_end(ap); |
---|
308 | |
---|
309 | return eno; |
---|
310 | } |
---|