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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/scheduler.h> |
29 | #include <proc/scheduler.h> |
30 | #include <proc/thread.h> |
30 | #include <proc/thread.h> |
31 | #include <proc/task.h> |
31 | #include <proc/task.h> |
32 | #include <mm/frame.h> |
32 | #include <mm/frame.h> |
33 | #include <mm/page.h> |
33 | #include <mm/page.h> |
34 | #include <arch/asm.h> |
34 | #include <arch/asm.h> |
35 | #include <arch.h> |
35 | #include <arch.h> |
36 | #include <synch/synch.h> |
36 | #include <synch/synch.h> |
37 | #include <synch/spinlock.h> |
37 | #include <synch/spinlock.h> |
38 | #include <synch/waitq.h> |
38 | #include <synch/waitq.h> |
39 | #include <synch/rwlock.h> |
39 | #include <synch/rwlock.h> |
40 | #include <cpu.h> |
40 | #include <cpu.h> |
41 | #include <func.h> |
41 | #include <func.h> |
42 | #include <context.h> |
42 | #include <context.h> |
43 | #include <adt/list.h> |
43 | #include <adt/list.h> |
44 | #include <typedefs.h> |
44 | #include <typedefs.h> |
45 | #include <time/clock.h> |
45 | #include <time/clock.h> |
46 | #include <adt/list.h> |
46 | #include <adt/list.h> |
47 | #include <config.h> |
47 | #include <config.h> |
48 | #include <arch/interrupt.h> |
48 | #include <arch/interrupt.h> |
49 | #include <smp/ipi.h> |
49 | #include <smp/ipi.h> |
50 | #include <arch/faddr.h> |
50 | #include <arch/faddr.h> |
51 | #include <arch/atomic.h> |
51 | #include <arch/atomic.h> |
52 | #include <memstr.h> |
52 | #include <memstr.h> |
53 | #include <print.h> |
53 | #include <print.h> |
54 | #include <mm/slab.h> |
54 | #include <mm/slab.h> |
55 | #include <debug.h> |
55 | #include <debug.h> |
- | 56 | #include <main/uinit.h> |
|
56 | 57 | ||
57 | char *thread_states[] = {"Invalid", "Running", "Sleeping", "Ready", "Entering", "Exiting"}; /**< Thread states */ |
58 | char *thread_states[] = {"Invalid", "Running", "Sleeping", "Ready", "Entering", "Exiting"}; /**< Thread states */ |
58 | 59 | ||
59 | SPINLOCK_INITIALIZE(threads_lock); /**< Lock protecting threads_head list. For locking rules, see declaration thereof. */ |
60 | SPINLOCK_INITIALIZE(threads_lock); /**< Lock protecting threads_head list. For locking rules, see declaration thereof. */ |
60 | LIST_INITIALIZE(threads_head); /**< List of all threads. */ |
61 | LIST_INITIALIZE(threads_head); /**< List of all threads. */ |
61 | 62 | ||
62 | SPINLOCK_INITIALIZE(tidlock); |
63 | SPINLOCK_INITIALIZE(tidlock); |
63 | __u32 last_tid = 0; |
64 | __u32 last_tid = 0; |
64 | 65 | ||
65 | static slab_cache_t *thread_slab; |
66 | static slab_cache_t *thread_slab; |
66 | #ifdef ARCH_HAS_FPU |
67 | #ifdef ARCH_HAS_FPU |
67 | slab_cache_t *fpu_context_slab; |
68 | slab_cache_t *fpu_context_slab; |
68 | #endif |
69 | #endif |
69 | 70 | ||
70 | 71 | ||
71 | /** Thread wrapper |
72 | /** Thread wrapper |
72 | * |
73 | * |
73 | * This wrapper is provided to ensure that every thread |
74 | * This wrapper is provided to ensure that every thread |
74 | * makes a call to thread_exit() when its implementing |
75 | * makes a call to thread_exit() when its implementing |
75 | * function returns. |
76 | * function returns. |
76 | * |
77 | * |
77 | * interrupts_disable() is assumed. |
78 | * interrupts_disable() is assumed. |
78 | * |
79 | * |
79 | */ |
80 | */ |
80 | static void cushion(void) |
81 | static void cushion(void) |
81 | { |
82 | { |
82 | void (*f)(void *) = THREAD->thread_code; |
83 | void (*f)(void *) = THREAD->thread_code; |
83 | void *arg = THREAD->thread_arg; |
84 | void *arg = THREAD->thread_arg; |
84 | 85 | ||
85 | /* this is where each thread wakes up after its creation */ |
86 | /* this is where each thread wakes up after its creation */ |
86 | before_thread_runs(); |
87 | before_thread_runs(); |
87 | 88 | ||
88 | spinlock_unlock(&THREAD->lock); |
89 | spinlock_unlock(&THREAD->lock); |
89 | interrupts_enable(); |
90 | interrupts_enable(); |
90 | 91 | ||
91 | f(arg); |
92 | f(arg); |
92 | thread_exit(); |
93 | thread_exit(); |
93 | /* not reached */ |
94 | /* not reached */ |
94 | } |
95 | } |
95 | 96 | ||
96 | /** Initialization and allocation for thread_t structure */ |
97 | /** Initialization and allocation for thread_t structure */ |
97 | static int thr_constructor(void *obj, int kmflags) |
98 | static int thr_constructor(void *obj, int kmflags) |
98 | { |
99 | { |
99 | thread_t *t = (thread_t *)obj; |
100 | thread_t *t = (thread_t *)obj; |
100 | pfn_t pfn; |
101 | pfn_t pfn; |
101 | int status; |
102 | int status; |
102 | 103 | ||
103 | spinlock_initialize(&t->lock, "thread_t_lock"); |
104 | spinlock_initialize(&t->lock, "thread_t_lock"); |
104 | link_initialize(&t->rq_link); |
105 | link_initialize(&t->rq_link); |
105 | link_initialize(&t->wq_link); |
106 | link_initialize(&t->wq_link); |
106 | link_initialize(&t->th_link); |
107 | link_initialize(&t->th_link); |
107 | link_initialize(&t->threads_link); |
108 | link_initialize(&t->threads_link); |
108 | 109 | ||
109 | #ifdef ARCH_HAS_FPU |
110 | #ifdef ARCH_HAS_FPU |
110 | # ifdef CONFIG_FPU_LAZY |
111 | # ifdef CONFIG_FPU_LAZY |
111 | t->saved_fpu_context = NULL; |
112 | t->saved_fpu_context = NULL; |
112 | # else |
113 | # else |
113 | t->saved_fpu_context = slab_alloc(fpu_context_slab,kmflags); |
114 | t->saved_fpu_context = slab_alloc(fpu_context_slab,kmflags); |
114 | if (!t->saved_fpu_context) |
115 | if (!t->saved_fpu_context) |
115 | return -1; |
116 | return -1; |
116 | # endif |
117 | # endif |
117 | #endif |
118 | #endif |
118 | 119 | ||
119 | pfn = frame_alloc_rc(STACK_FRAMES, FRAME_KA | kmflags,&status); |
120 | pfn = frame_alloc_rc(STACK_FRAMES, FRAME_KA | kmflags,&status); |
120 | if (status) { |
121 | if (status) { |
121 | #ifdef ARCH_HAS_FPU |
122 | #ifdef ARCH_HAS_FPU |
122 | if (t->saved_fpu_context) |
123 | if (t->saved_fpu_context) |
123 | slab_free(fpu_context_slab,t->saved_fpu_context); |
124 | slab_free(fpu_context_slab,t->saved_fpu_context); |
124 | #endif |
125 | #endif |
125 | return -1; |
126 | return -1; |
126 | } |
127 | } |
127 | t->kstack = (__u8 *)PA2KA(PFN2ADDR(pfn)); |
128 | t->kstack = (__u8 *)PA2KA(PFN2ADDR(pfn)); |
128 | 129 | ||
129 | return 0; |
130 | return 0; |
130 | } |
131 | } |
131 | 132 | ||
132 | /** Destruction of thread_t object */ |
133 | /** Destruction of thread_t object */ |
133 | static int thr_destructor(void *obj) |
134 | static int thr_destructor(void *obj) |
134 | { |
135 | { |
135 | thread_t *t = (thread_t *)obj; |
136 | thread_t *t = (thread_t *)obj; |
136 | 137 | ||
137 | frame_free(ADDR2PFN(KA2PA(t->kstack))); |
138 | frame_free(ADDR2PFN(KA2PA(t->kstack))); |
138 | #ifdef ARCH_HAS_FPU |
139 | #ifdef ARCH_HAS_FPU |
139 | if (t->saved_fpu_context) |
140 | if (t->saved_fpu_context) |
140 | slab_free(fpu_context_slab,t->saved_fpu_context); |
141 | slab_free(fpu_context_slab,t->saved_fpu_context); |
141 | #endif |
142 | #endif |
142 | return 1; /* One page freed */ |
143 | return 1; /* One page freed */ |
143 | } |
144 | } |
144 | 145 | ||
145 | /** Initialize threads |
146 | /** Initialize threads |
146 | * |
147 | * |
147 | * Initialize kernel threads support. |
148 | * Initialize kernel threads support. |
148 | * |
149 | * |
149 | */ |
150 | */ |
150 | void thread_init(void) |
151 | void thread_init(void) |
151 | { |
152 | { |
152 | THREAD = NULL; |
153 | THREAD = NULL; |
153 | atomic_set(&nrdy,0); |
154 | atomic_set(&nrdy,0); |
154 | thread_slab = slab_cache_create("thread_slab", |
155 | thread_slab = slab_cache_create("thread_slab", |
155 | sizeof(thread_t),0, |
156 | sizeof(thread_t),0, |
156 | thr_constructor, thr_destructor, 0); |
157 | thr_constructor, thr_destructor, 0); |
157 | #ifdef ARCH_HAS_FPU |
158 | #ifdef ARCH_HAS_FPU |
158 | fpu_context_slab = slab_cache_create("fpu_slab", |
159 | fpu_context_slab = slab_cache_create("fpu_slab", |
159 | sizeof(fpu_context_t), |
160 | sizeof(fpu_context_t), |
160 | FPU_CONTEXT_ALIGN, |
161 | FPU_CONTEXT_ALIGN, |
161 | NULL, NULL, 0); |
162 | NULL, NULL, 0); |
162 | #endif |
163 | #endif |
163 | } |
164 | } |
164 | 165 | ||
165 | 166 | ||
166 | /** Make thread ready |
167 | /** Make thread ready |
167 | * |
168 | * |
168 | * Switch thread t to the ready state. |
169 | * Switch thread t to the ready state. |
169 | * |
170 | * |
170 | * @param t Thread to make ready. |
171 | * @param t Thread to make ready. |
171 | * |
172 | * |
172 | */ |
173 | */ |
173 | void thread_ready(thread_t *t) |
174 | void thread_ready(thread_t *t) |
174 | { |
175 | { |
175 | cpu_t *cpu; |
176 | cpu_t *cpu; |
176 | runq_t *r; |
177 | runq_t *r; |
177 | ipl_t ipl; |
178 | ipl_t ipl; |
178 | int i, avg; |
179 | int i, avg; |
179 | 180 | ||
180 | ipl = interrupts_disable(); |
181 | ipl = interrupts_disable(); |
181 | 182 | ||
182 | spinlock_lock(&t->lock); |
183 | spinlock_lock(&t->lock); |
183 | 184 | ||
184 | i = (t->priority < RQ_COUNT -1) ? ++t->priority : t->priority; |
185 | i = (t->priority < RQ_COUNT -1) ? ++t->priority : t->priority; |
185 | 186 | ||
186 | cpu = CPU; |
187 | cpu = CPU; |
187 | if (t->flags & X_WIRED) { |
188 | if (t->flags & X_WIRED) { |
188 | cpu = t->cpu; |
189 | cpu = t->cpu; |
189 | } |
190 | } |
190 | spinlock_unlock(&t->lock); |
191 | spinlock_unlock(&t->lock); |
191 | 192 | ||
192 | /* |
193 | /* |
193 | * Append t to respective ready queue on respective processor. |
194 | * Append t to respective ready queue on respective processor. |
194 | */ |
195 | */ |
195 | r = &cpu->rq[i]; |
196 | r = &cpu->rq[i]; |
196 | spinlock_lock(&r->lock); |
197 | spinlock_lock(&r->lock); |
197 | list_append(&t->rq_link, &r->rq_head); |
198 | list_append(&t->rq_link, &r->rq_head); |
198 | r->n++; |
199 | r->n++; |
199 | spinlock_unlock(&r->lock); |
200 | spinlock_unlock(&r->lock); |
200 | 201 | ||
201 | atomic_inc(&nrdy); |
202 | atomic_inc(&nrdy); |
202 | avg = atomic_get(&nrdy) / config.cpu_active; |
203 | avg = atomic_get(&nrdy) / config.cpu_active; |
203 | atomic_inc(&cpu->nrdy); |
204 | atomic_inc(&cpu->nrdy); |
204 | 205 | ||
205 | interrupts_restore(ipl); |
206 | interrupts_restore(ipl); |
206 | } |
207 | } |
207 | 208 | ||
208 | 209 | ||
209 | /** Destroy thread memory structure |
210 | /** Destroy thread memory structure |
210 | * |
211 | * |
211 | * Detach thread from all queues, cpus etc. and destroy it. |
212 | * Detach thread from all queues, cpus etc. and destroy it. |
212 | * |
213 | * |
213 | * Assume thread->lock is held!! |
214 | * Assume thread->lock is held!! |
214 | */ |
215 | */ |
215 | void thread_destroy(thread_t *t) |
216 | void thread_destroy(thread_t *t) |
216 | { |
217 | { |
217 | ASSERT(t->state == Exiting); |
218 | ASSERT(t->state == Exiting); |
218 | ASSERT(t->task); |
219 | ASSERT(t->task); |
219 | ASSERT(t->cpu); |
220 | ASSERT(t->cpu); |
220 | 221 | ||
221 | spinlock_lock(&t->cpu->lock); |
222 | spinlock_lock(&t->cpu->lock); |
222 | if(t->cpu->fpu_owner==t) |
223 | if(t->cpu->fpu_owner==t) |
223 | t->cpu->fpu_owner=NULL; |
224 | t->cpu->fpu_owner=NULL; |
224 | spinlock_unlock(&t->cpu->lock); |
225 | spinlock_unlock(&t->cpu->lock); |
225 | 226 | ||
226 | /* |
227 | /* |
227 | * Detach from the containing task. |
228 | * Detach from the containing task. |
228 | */ |
229 | */ |
229 | spinlock_lock(&t->task->lock); |
230 | spinlock_lock(&t->task->lock); |
230 | list_remove(&t->th_link); |
231 | list_remove(&t->th_link); |
231 | spinlock_unlock(&t->task->lock); |
232 | spinlock_unlock(&t->task->lock); |
232 | 233 | ||
233 | spinlock_unlock(&t->lock); |
234 | spinlock_unlock(&t->lock); |
234 | 235 | ||
235 | spinlock_lock(&threads_lock); |
236 | spinlock_lock(&threads_lock); |
236 | list_remove(&t->threads_link); |
237 | list_remove(&t->threads_link); |
237 | spinlock_unlock(&threads_lock); |
238 | spinlock_unlock(&threads_lock); |
238 | 239 | ||
239 | slab_free(thread_slab, t); |
240 | slab_free(thread_slab, t); |
240 | } |
241 | } |
241 | 242 | ||
242 | 243 | ||
243 | /** Create new thread |
244 | /** Create new thread |
244 | * |
245 | * |
245 | * Create a new thread. |
246 | * Create a new thread. |
246 | * |
247 | * |
247 | * @param func Thread's implementing function. |
248 | * @param func Thread's implementing function. |
248 | * @param arg Thread's implementing function argument. |
249 | * @param arg Thread's implementing function argument. |
249 | * @param task Task to which the thread belongs. |
250 | * @param task Task to which the thread belongs. |
250 | * @param flags Thread flags. |
251 | * @param flags Thread flags. |
251 | * @param name Symbolic name. |
252 | * @param name Symbolic name. |
252 | * |
253 | * |
253 | * @return New thread's structure on success, NULL on failure. |
254 | * @return New thread's structure on success, NULL on failure. |
254 | * |
255 | * |
255 | */ |
256 | */ |
256 | thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags, char *name) |
257 | thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags, char *name) |
257 | { |
258 | { |
258 | thread_t *t; |
259 | thread_t *t; |
259 | ipl_t ipl; |
260 | ipl_t ipl; |
260 | 261 | ||
261 | t = (thread_t *) slab_alloc(thread_slab, 0); |
262 | t = (thread_t *) slab_alloc(thread_slab, 0); |
262 | if (!t) |
263 | if (!t) |
263 | return NULL; |
264 | return NULL; |
264 | 265 | ||
265 | /* Not needed, but good for debugging */ |
266 | /* Not needed, but good for debugging */ |
266 | memsetb((__address)t->kstack, THREAD_STACK_SIZE, 0); |
267 | memsetb((__address)t->kstack, THREAD_STACK_SIZE, 0); |
267 | 268 | ||
268 | ipl = interrupts_disable(); |
269 | ipl = interrupts_disable(); |
269 | spinlock_lock(&tidlock); |
270 | spinlock_lock(&tidlock); |
270 | t->tid = ++last_tid; |
271 | t->tid = ++last_tid; |
271 | spinlock_unlock(&tidlock); |
272 | spinlock_unlock(&tidlock); |
272 | interrupts_restore(ipl); |
273 | interrupts_restore(ipl); |
273 | 274 | ||
274 | context_save(&t->saved_context); |
275 | context_save(&t->saved_context); |
275 | context_set(&t->saved_context, FADDR(cushion), (__address) t->kstack, THREAD_STACK_SIZE); |
276 | context_set(&t->saved_context, FADDR(cushion), (__address) t->kstack, THREAD_STACK_SIZE); |
276 | 277 | ||
277 | the_initialize((the_t *) t->kstack); |
278 | the_initialize((the_t *) t->kstack); |
278 | 279 | ||
279 | ipl = interrupts_disable(); |
280 | ipl = interrupts_disable(); |
280 | t->saved_context.ipl = interrupts_read(); |
281 | t->saved_context.ipl = interrupts_read(); |
281 | interrupts_restore(ipl); |
282 | interrupts_restore(ipl); |
282 | 283 | ||
283 | t->name = name; |
284 | memcpy(t->name, name, THREAD_NAME_BUFLEN); |
- | 285 | ||
284 | t->thread_code = func; |
286 | t->thread_code = func; |
285 | t->thread_arg = arg; |
287 | t->thread_arg = arg; |
286 | t->ticks = -1; |
288 | t->ticks = -1; |
287 | t->priority = -1; /* start in rq[0] */ |
289 | t->priority = -1; /* start in rq[0] */ |
288 | t->cpu = NULL; |
290 | t->cpu = NULL; |
289 | t->flags = 0; |
291 | t->flags = 0; |
290 | t->state = Entering; |
292 | t->state = Entering; |
291 | t->call_me = NULL; |
293 | t->call_me = NULL; |
292 | t->call_me_with = NULL; |
294 | t->call_me_with = NULL; |
293 | 295 | ||
294 | timeout_initialize(&t->sleep_timeout); |
296 | timeout_initialize(&t->sleep_timeout); |
295 | t->sleep_queue = NULL; |
297 | t->sleep_queue = NULL; |
296 | t->timeout_pending = 0; |
298 | t->timeout_pending = 0; |
297 | 299 | ||
298 | t->rwlock_holder_type = RWLOCK_NONE; |
300 | t->rwlock_holder_type = RWLOCK_NONE; |
299 | 301 | ||
300 | t->task = task; |
302 | t->task = task; |
301 | 303 | ||
302 | t->fpu_context_exists = 0; |
304 | t->fpu_context_exists = 0; |
303 | t->fpu_context_engaged = 0; |
305 | t->fpu_context_engaged = 0; |
304 | 306 | ||
305 | /* |
307 | /* |
306 | * Register this thread in the system-wide list. |
308 | * Register this thread in the system-wide list. |
307 | */ |
309 | */ |
308 | ipl = interrupts_disable(); |
310 | ipl = interrupts_disable(); |
309 | spinlock_lock(&threads_lock); |
311 | spinlock_lock(&threads_lock); |
310 | list_append(&t->threads_link, &threads_head); |
312 | list_append(&t->threads_link, &threads_head); |
311 | spinlock_unlock(&threads_lock); |
313 | spinlock_unlock(&threads_lock); |
312 | 314 | ||
313 | /* |
315 | /* |
314 | * Attach to the containing task. |
316 | * Attach to the containing task. |
315 | */ |
317 | */ |
316 | spinlock_lock(&task->lock); |
318 | spinlock_lock(&task->lock); |
317 | list_append(&t->th_link, &task->th_head); |
319 | list_append(&t->th_link, &task->th_head); |
318 | spinlock_unlock(&task->lock); |
320 | spinlock_unlock(&task->lock); |
319 | 321 | ||
320 | interrupts_restore(ipl); |
322 | interrupts_restore(ipl); |
321 | 323 | ||
322 | return t; |
324 | return t; |
323 | } |
325 | } |
324 | 326 | ||
325 | 327 | ||
326 | /** Make thread exiting |
328 | /** Make thread exiting |
327 | * |
329 | * |
328 | * End current thread execution and switch it to the exiting |
330 | * End current thread execution and switch it to the exiting |
329 | * state. All pending timeouts are executed. |
331 | * state. All pending timeouts are executed. |
330 | * |
332 | * |
331 | */ |
333 | */ |
332 | void thread_exit(void) |
334 | void thread_exit(void) |
333 | { |
335 | { |
334 | ipl_t ipl; |
336 | ipl_t ipl; |
335 | 337 | ||
336 | restart: |
338 | restart: |
337 | ipl = interrupts_disable(); |
339 | ipl = interrupts_disable(); |
338 | spinlock_lock(&THREAD->lock); |
340 | spinlock_lock(&THREAD->lock); |
339 | if (THREAD->timeout_pending) { /* busy waiting for timeouts in progress */ |
341 | if (THREAD->timeout_pending) { /* busy waiting for timeouts in progress */ |
340 | spinlock_unlock(&THREAD->lock); |
342 | spinlock_unlock(&THREAD->lock); |
341 | interrupts_restore(ipl); |
343 | interrupts_restore(ipl); |
342 | goto restart; |
344 | goto restart; |
343 | } |
345 | } |
344 | THREAD->state = Exiting; |
346 | THREAD->state = Exiting; |
345 | spinlock_unlock(&THREAD->lock); |
347 | spinlock_unlock(&THREAD->lock); |
346 | scheduler(); |
348 | scheduler(); |
347 | } |
349 | } |
348 | 350 | ||
349 | 351 | ||
350 | /** Thread sleep |
352 | /** Thread sleep |
351 | * |
353 | * |
352 | * Suspend execution of the current thread. |
354 | * Suspend execution of the current thread. |
353 | * |
355 | * |
354 | * @param sec Number of seconds to sleep. |
356 | * @param sec Number of seconds to sleep. |
355 | * |
357 | * |
356 | */ |
358 | */ |
357 | void thread_sleep(__u32 sec) |
359 | void thread_sleep(__u32 sec) |
358 | { |
360 | { |
359 | thread_usleep(sec*1000000); |
361 | thread_usleep(sec*1000000); |
360 | } |
362 | } |
361 | 363 | ||
362 | 364 | ||
363 | /** Thread usleep |
365 | /** Thread usleep |
364 | * |
366 | * |
365 | * Suspend execution of the current thread. |
367 | * Suspend execution of the current thread. |
366 | * |
368 | * |
367 | * @param usec Number of microseconds to sleep. |
369 | * @param usec Number of microseconds to sleep. |
368 | * |
370 | * |
369 | */ |
371 | */ |
370 | void thread_usleep(__u32 usec) |
372 | void thread_usleep(__u32 usec) |
371 | { |
373 | { |
372 | waitq_t wq; |
374 | waitq_t wq; |
373 | 375 | ||
374 | waitq_initialize(&wq); |
376 | waitq_initialize(&wq); |
375 | 377 | ||
376 | (void) waitq_sleep_timeout(&wq, usec, SYNCH_NON_BLOCKING); |
378 | (void) waitq_sleep_timeout(&wq, usec, SYNCH_NON_BLOCKING); |
377 | } |
379 | } |
378 | 380 | ||
379 | 381 | ||
380 | /** Register thread out-of-context invocation |
382 | /** Register thread out-of-context invocation |
381 | * |
383 | * |
382 | * Register a function and its argument to be executed |
384 | * Register a function and its argument to be executed |
383 | * on next context switch to the current thread. |
385 | * on next context switch to the current thread. |
384 | * |
386 | * |
385 | * @param call_me Out-of-context function. |
387 | * @param call_me Out-of-context function. |
386 | * @param call_me_with Out-of-context function argument. |
388 | * @param call_me_with Out-of-context function argument. |
387 | * |
389 | * |
388 | */ |
390 | */ |
389 | void thread_register_call_me(void (* call_me)(void *), void *call_me_with) |
391 | void thread_register_call_me(void (* call_me)(void *), void *call_me_with) |
390 | { |
392 | { |
391 | ipl_t ipl; |
393 | ipl_t ipl; |
392 | 394 | ||
393 | ipl = interrupts_disable(); |
395 | ipl = interrupts_disable(); |
394 | spinlock_lock(&THREAD->lock); |
396 | spinlock_lock(&THREAD->lock); |
395 | THREAD->call_me = call_me; |
397 | THREAD->call_me = call_me; |
396 | THREAD->call_me_with = call_me_with; |
398 | THREAD->call_me_with = call_me_with; |
397 | spinlock_unlock(&THREAD->lock); |
399 | spinlock_unlock(&THREAD->lock); |
398 | interrupts_restore(ipl); |
400 | interrupts_restore(ipl); |
399 | } |
401 | } |
400 | 402 | ||
401 | /** Print list of threads debug info */ |
403 | /** Print list of threads debug info */ |
402 | void thread_print_list(void) |
404 | void thread_print_list(void) |
403 | { |
405 | { |
404 | link_t *cur; |
406 | link_t *cur; |
405 | thread_t *t; |
407 | thread_t *t; |
406 | ipl_t ipl; |
408 | ipl_t ipl; |
407 | 409 | ||
408 | /* Messing with thread structures, avoid deadlock */ |
410 | /* Messing with thread structures, avoid deadlock */ |
409 | ipl = interrupts_disable(); |
411 | ipl = interrupts_disable(); |
410 | spinlock_lock(&threads_lock); |
412 | spinlock_lock(&threads_lock); |
411 | 413 | ||
412 | for (cur=threads_head.next; cur!=&threads_head; cur=cur->next) { |
414 | for (cur=threads_head.next; cur!=&threads_head; cur=cur->next) { |
413 | t = list_get_instance(cur, thread_t, threads_link); |
415 | t = list_get_instance(cur, thread_t, threads_link); |
414 | printf("%s: address=%P, tid=%d, state=%s, task=%P, code=%P, stack=%P, cpu=", |
416 | printf("%s: address=%P, tid=%d, state=%s, task=%P, code=%P, stack=%P, cpu=", |
415 | t->name, t, t->tid, thread_states[t->state], t->task, t->thread_code, t->kstack); |
417 | t->name, t, t->tid, thread_states[t->state], t->task, t->thread_code, t->kstack); |
416 | if (t->cpu) |
418 | if (t->cpu) |
417 | printf("cpu%d ", t->cpu->id); |
419 | printf("cpu%d ", t->cpu->id); |
418 | else |
420 | else |
419 | printf("none"); |
421 | printf("none"); |
420 | printf("\n"); |
422 | printf("\n"); |
421 | } |
423 | } |
422 | 424 | ||
423 | spinlock_unlock(&threads_lock); |
425 | spinlock_unlock(&threads_lock); |
424 | interrupts_restore(ipl); |
426 | interrupts_restore(ipl); |
425 | } |
427 | } |
- | 428 | ||
- | 429 | /** Process syscall to create new thread. |
|
- | 430 | * |
|
- | 431 | */ |
|
- | 432 | __native sys_thread_create(__address function, void *arg, void *stack, char *name) |
|
- | 433 | { |
|
- | 434 | thread_t *t; |
|
- | 435 | char namebuf[THREAD_NAME_BUFLEN]; |
|
- | 436 | uspace_arg_t *uarg; |
|
- | 437 | __u32 tid; |
|
- | 438 | ||
- | 439 | copy_from_uspace(namebuf, name, THREAD_NAME_BUFLEN); |
|
- | 440 | uarg = (uspace_arg_t *) malloc(sizeof(uarg), 0); |
|
- | 441 | ||
- | 442 | uarg->uspace_entry = function; |
|
- | 443 | uarg->uspace_stack = (__address) stack; |
|
- | 444 | ||
- | 445 | if ((t = thread_create(uinit, uarg, TASK, 0, namebuf))) { |
|
- | 446 | tid = t->tid; |
|
- | 447 | thread_ready(t); |
|
- | 448 | return (__native) tid; |
|
- | 449 | } else { |
|
- | 450 | free(namebuf); |
|
- | 451 | } |
|
- | 452 | ||
- | 453 | return (__native) -1; |
|
- | 454 | } |
|
- | 455 | ||
- | 456 | /** Process syscall to terminate thread. |
|
- | 457 | * |
|
- | 458 | */ |
|
- | 459 | __native sys_thread_exit(int status) |
|
- | 460 | { |
|
- | 461 | thread_exit(); |
|
- | 462 | /* Unreachable */ |
|
- | 463 | return 0; |
|
- | 464 | } |
|
426 | 465 |