WebSVN – HelenOS-historic – Diff – /SPARTAN/trunk/src/proc/thread.c



 *
 * This wrapper is provided to ensure that every thread
 * makes a call to thread_exit() when its implementing
 * function returns.
 *
 * interrupts_disable() is assumed.
 *
 */
void cushion(void)
{
    void (*f)(void *) = THREAD->thread_code;

 
    /* this is where each thread wakes up after its creation */
    before_thread_runs();
 
    spinlock_unlock(&THREAD->lock);
    interrupts_enable();
 
    f(arg);
    thread_exit();
    /* not reached */
}

 */
void thread_ready(thread_t *t)
{
    cpu_t *cpu;
    runq_t *r;
    ipl_t ipl;
    int i, avg, send_ipi = 0;
 
    ipl = interrupts_disable();
 
    spinlock_lock(&t->lock);
 
    i = (t->priority < RQ_COUNT -1) ? ++t->priority : t->priority;
   
    cpu = CPU;
    if (t->flags & X_WIRED) {
        cpu = t->cpu;
    }

         */
        ipi_broadcast(VECTOR_WAKEUP_IPI);
    }  
    spinlock_unlock(&cpu->lock);
 
    interrupts_restore(ipl);
}
 
 
/** Create new thread
 *

    thread_t *t;
    __address frame_ks, frame_us = NULL;
 
    t = (thread_t *) malloc(sizeof(thread_t));
    if (t) {
        ipl_t ipl;
   
        spinlock_initialize(&t->lock);
   
        frame_ks = frame_alloc(FRAME_KA);
        if (THREAD_USER_STACK & flags) {
            frame_us = frame_alloc(FRAME_KA);
        }
 
        ipl = interrupts_disable();
        spinlock_lock(&tidlock);
        t->tid = ++last_tid;
        spinlock_unlock(&tidlock);
        interrupts_restore(ipl);
       
        memsetb(frame_ks, THREAD_STACK_SIZE, 0);
        link_initialize(&t->rq_link);
        link_initialize(&t->wq_link);
        link_initialize(&t->th_link);

        context_save(&t->saved_context);
        context_set(&t->saved_context, FADDR(cushion), t->kstack, THREAD_STACK_SIZE);
       
        the_initialize((the_t *) t->kstack);
 
        ipl = interrupts_disable();
        t->saved_context.ipl = interrupts_read();
        interrupts_restore(ipl);
       
        t->thread_code = func;
        t->thread_arg = arg;
        t->ticks = -1;
        t->priority = -1;       /* start in rq[0] */
        t->cpu = NULL;
        t->flags = 0;
        t->state = Entering;
        t->call_me = NULL;
        t->call_me_with = NULL;

        t->fpu_context_engaged=0;
       
        /*
         * Register this thread in the system-wide list.
         */
        ipl = interrupts_disable();    
        spinlock_lock(&threads_lock);
        list_append(&t->threads_link, &threads_head);
        spinlock_unlock(&threads_lock);
 
        /*

         */
        spinlock_lock(&task->lock);
        list_append(&t->th_link, &task->th_head);
        spinlock_unlock(&task->lock);
 
        interrupts_restore(ipl);
    }
 
    return t;
}
 

 * state. All pending timeouts are executed.
 *
 */
void thread_exit(void)
{
    ipl_t ipl;
 
restart:
    ipl = interrupts_disable();
    spinlock_lock(&THREAD->lock);
    if (THREAD->timeout_pending) { /* busy waiting for timeouts in progress */
        spinlock_unlock(&THREAD->lock);
        interrupts_restore(ipl);
        goto restart;
    }
    THREAD->state = Exiting;
    spinlock_unlock(&THREAD->lock);
    scheduler();

 * @param call_me_with Out-of-context function argument.
 *
 */
void thread_register_call_me(void (* call_me)(void *), void *call_me_with)
{
    ipl_t ipl;
   
    ipl = interrupts_disable();
    spinlock_lock(&THREAD->lock);
    THREAD->call_me = call_me;
    THREAD->call_me_with = call_me_with;
    spinlock_unlock(&THREAD->lock);
    interrupts_restore(ipl);
}

Rev 248	Rev 413
Line 65...	Line 65...
65	*	65	*
66	* This wrapper is provided to ensure that every thread	66	* This wrapper is provided to ensure that every thread
67	* makes a call to thread_exit() when its implementing	67	* makes a call to thread_exit() when its implementing
68	* function returns.	68	* function returns.
69	*	69	*
70	* cpu_priority_high() is assumed.	70	* interrupts_disable() is assumed.
71	*	71	*
72	*/	72	*/
73	void cushion(void)	73	void cushion(void)
74	{	74	{
75	void (f)(void ) = THREAD->thread_code;	75	void (f)(void ) = THREAD->thread_code;
Line 77...	Line 77...
77		77
78	/* this is where each thread wakes up after its creation */	78	/* this is where each thread wakes up after its creation */
79	before_thread_runs();	79	before_thread_runs();
80		80
81	spinlock_unlock(&THREAD->lock);	81	spinlock_unlock(&THREAD->lock);
82	cpu_priority_low();	82	interrupts_enable();
83		83
84	f(arg);	84	f(arg);
85	thread_exit();	85	thread_exit();
86	/* not reached */	86	/* not reached */
87	}	87	}
Line 110...	Line 110...
110	*/	110	*/
111	void thread_ready(thread_t *t)	111	void thread_ready(thread_t *t)
112	{	112	{
113	cpu_t *cpu;	113	cpu_t *cpu;
114	runq_t *r;	114	runq_t *r;
115	pri_t pri;	115	ipl_t ipl;
116	int i, avg, send_ipi = 0;	116	int i, avg, send_ipi = 0;
117		117
118	pri = cpu_priority_high();	118	ipl = interrupts_disable();
119		119
120	spinlock_lock(&t->lock);	120	spinlock_lock(&t->lock);
121		121
122	i = (t->pri < RQ_COUNT -1) ? ++t->pri : t->pri;	122	i = (t->priority < RQ_COUNT -1) ? ++t->priority : t->priority;
123		123
124	cpu = CPU;	124	cpu = CPU;
125	if (t->flags & X_WIRED) {	125	if (t->flags & X_WIRED) {
126	cpu = t->cpu;	126	cpu = t->cpu;
127	}	127	}
Line 146...	Line 146...
146	*/	146	*/
147	ipi_broadcast(VECTOR_WAKEUP_IPI);	147	ipi_broadcast(VECTOR_WAKEUP_IPI);
148	}	148	}
149	spinlock_unlock(&cpu->lock);	149	spinlock_unlock(&cpu->lock);
150		150
151	cpu_priority_restore(pri);	151	interrupts_restore(ipl);
152	}	152	}
153		153
154		154
155	/** Create new thread	155	/** Create new thread
156	*	156	*
Line 169...	Line 169...
169	thread_t *t;	169	thread_t *t;
170	__address frame_ks, frame_us = NULL;	170	__address frame_ks, frame_us = NULL;
171		171
172	t = (thread_t *) malloc(sizeof(thread_t));	172	t = (thread_t *) malloc(sizeof(thread_t));
173	if (t) {	173	if (t) {
174	pri_t pri;	174	ipl_t ipl;
175		175
176	spinlock_initialize(&t->lock);	176	spinlock_initialize(&t->lock);
177		177
178	frame_ks = frame_alloc(FRAME_KA);	178	frame_ks = frame_alloc(FRAME_KA);
179	if (THREAD_USER_STACK & flags) {	179	if (THREAD_USER_STACK & flags) {
180	frame_us = frame_alloc(FRAME_KA);	180	frame_us = frame_alloc(FRAME_KA);
181	}	181	}
182		182
183	pri = cpu_priority_high();	183	ipl = interrupts_disable();
184	spinlock_lock(&tidlock);	184	spinlock_lock(&tidlock);
185	t->tid = ++last_tid;	185	t->tid = ++last_tid;
186	spinlock_unlock(&tidlock);	186	spinlock_unlock(&tidlock);
187	cpu_priority_restore(pri);	187	interrupts_restore(ipl);
188		188
189	memsetb(frame_ks, THREAD_STACK_SIZE, 0);	189	memsetb(frame_ks, THREAD_STACK_SIZE, 0);
190	link_initialize(&t->rq_link);	190	link_initialize(&t->rq_link);
191	link_initialize(&t->wq_link);	191	link_initialize(&t->wq_link);
192	link_initialize(&t->th_link);	192	link_initialize(&t->th_link);
Line 197...	Line 197...
197	context_save(&t->saved_context);	197	context_save(&t->saved_context);
198	context_set(&t->saved_context, FADDR(cushion), t->kstack, THREAD_STACK_SIZE);	198	context_set(&t->saved_context, FADDR(cushion), t->kstack, THREAD_STACK_SIZE);
199		199
200	the_initialize((the_t *) t->kstack);	200	the_initialize((the_t *) t->kstack);
201		201
202	pri = cpu_priority_high();	202	ipl = interrupts_disable();
203	t->saved_context.pri = cpu_priority_read();	203	t->saved_context.ipl = interrupts_read();
204	cpu_priority_restore(pri);	204	interrupts_restore(ipl);
205		205
206	t->thread_code = func;	206	t->thread_code = func;
207	t->thread_arg = arg;	207	t->thread_arg = arg;
208	t->ticks = -1;	208	t->ticks = -1;
209	t->pri = -1; /* start in rq[0] */	209	t->priority = -1; /* start in rq[0] */
210	t->cpu = NULL;	210	t->cpu = NULL;
211	t->flags = 0;	211	t->flags = 0;
212	t->state = Entering;	212	t->state = Entering;
213	t->call_me = NULL;	213	t->call_me = NULL;
214	t->call_me_with = NULL;	214	t->call_me_with = NULL;
Line 225...	Line 225...
225	t->fpu_context_engaged=0;	225	t->fpu_context_engaged=0;
226		226
227	/*	227	/*
228	* Register this thread in the system-wide list.	228	* Register this thread in the system-wide list.
229	*/	229	*/
230	pri = cpu_priority_high();	230	ipl = interrupts_disable();
231	spinlock_lock(&threads_lock);	231	spinlock_lock(&threads_lock);
232	list_append(&t->threads_link, &threads_head);	232	list_append(&t->threads_link, &threads_head);
233	spinlock_unlock(&threads_lock);	233	spinlock_unlock(&threads_lock);
234		234
235	/*	235	/*
Line 237...	Line 237...
237	*/	237	*/
238	spinlock_lock(&task->lock);	238	spinlock_lock(&task->lock);
239	list_append(&t->th_link, &task->th_head);	239	list_append(&t->th_link, &task->th_head);
240	spinlock_unlock(&task->lock);	240	spinlock_unlock(&task->lock);
241		241
242	cpu_priority_restore(pri);	242	interrupts_restore(ipl);
243	}	243	}
244		244
245	return t;	245	return t;
246	}	246	}
247		247
Line 252...	Line 252...
252	* state. All pending timeouts are executed.	252	* state. All pending timeouts are executed.
253	*	253	*
254	*/	254	*/
255	void thread_exit(void)	255	void thread_exit(void)
256	{	256	{
257	pri_t pri;	257	ipl_t ipl;
258		258
259	restart:	259	restart:
260	pri = cpu_priority_high();	260	ipl = interrupts_disable();
261	spinlock_lock(&THREAD->lock);	261	spinlock_lock(&THREAD->lock);
262	if (THREAD->timeout_pending) { /* busy waiting for timeouts in progress */	262	if (THREAD->timeout_pending) { /* busy waiting for timeouts in progress */
263	spinlock_unlock(&THREAD->lock);	263	spinlock_unlock(&THREAD->lock);
264	cpu_priority_restore(pri);	264	interrupts_restore(ipl);
265	goto restart;	265	goto restart;
266	}	266	}
267	THREAD->state = Exiting;	267	THREAD->state = Exiting;
268	spinlock_unlock(&THREAD->lock);	268	spinlock_unlock(&THREAD->lock);
269	scheduler();	269	scheduler();
Line 309...	Line 309...
309	* @param call_me_with Out-of-context function argument.	309	* @param call_me_with Out-of-context function argument.
310	*	310	*
311	*/	311	*/
312	void thread_register_call_me(void (* call_me)(void ), void call_me_with)	312	void thread_register_call_me(void (* call_me)(void ), void call_me_with)
313	{	313	{
314	pri_t pri;	314	ipl_t ipl;
315		315
316	pri = cpu_priority_high();	316	ipl = interrupts_disable();
317	spinlock_lock(&THREAD->lock);	317	spinlock_lock(&THREAD->lock);
318	THREAD->call_me = call_me;	318	THREAD->call_me = call_me;
319	THREAD->call_me_with = call_me_with;	319	THREAD->call_me_with = call_me_with;
320	spinlock_unlock(&THREAD->lock);	320	spinlock_unlock(&THREAD->lock);
321	cpu_priority_restore(pri);	321	interrupts_restore(ipl);
322	}	322	}

Subversion Repositories HelenOS-historic

(root)/SPARTAN/trunk/src/proc/thread.c – Rev 248 → 413