WebSVN – HelenOS – Diff – /branches/tracing/kernel/generic/src/proc/thread.c


/*
 * Copyright (C) 2001-2004 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 genericproc
 * @{
 */
 
/**
 * @file
 * @brief   Thread management functions.
 */
 
#include <proc/scheduler.h>
#include <proc/thread.h>
#include <proc/task.h>
#include <proc/uarg.h>
#include <mm/frame.h>
#include <mm/page.h>
#include <arch/asm.h>
#include <arch/cycle.h>
#include <arch.h>
#include <synch/synch.h>
#include <synch/spinlock.h>
#include <synch/waitq.h>
#include <synch/rwlock.h>
#include <cpu.h>
#include <func.h>
#include <context.h>
#include <adt/btree.h>
#include <adt/list.h>
#include <typedefs.h>
#include <time/clock.h>
#include <config.h>
#include <arch/interrupt.h>
#include <smp/ipi.h>
#include <arch/faddr.h>
#include <atomic.h>
#include <memstr.h>
#include <print.h>
#include <mm/slab.h>
#include <debug.h>
#include <main/uinit.h>
#include <syscall/copy.h>
#include <errno.h>
 
 
/** Thread states */
char *thread_states[] = {
    "Invalid",
    "Running",
    "Sleeping",
    "Ready",
    "Entering",
    "Exiting",
    "Undead"
};
 
/** Lock protecting the threads_btree B+tree. For locking rules, see declaration thereof. */
SPINLOCK_INITIALIZE(threads_lock);
 
/** B+tree of all threads.
 *
 * When a thread is found in the threads_btree B+tree, it is guaranteed to exist as long
 * as the threads_lock is held.
 */
btree_t threads_btree;     
 
SPINLOCK_INITIALIZE(tidlock);
uint32_t last_tid = 0;
 
static slab_cache_t *thread_slab;
#ifdef ARCH_HAS_FPU
slab_cache_t *fpu_context_slab;
#endif
 
/** Thread wrapper
 *
 * This wrapper is provided to ensure that every thread
 * makes a call to thread_exit() when its implementing
 * function returns.
 *
 * interrupts_disable() is assumed.
 *
 */
static void cushion(void)
{
    void (*f)(void *) = THREAD->thread_code;
    void *arg = THREAD->thread_arg;
 
    /* this is where each thread wakes up after its creation */
    spinlock_unlock(&THREAD->lock);
    interrupts_enable();
 
    f(arg);
    thread_exit();
    /* not reached */
}
 
/** Initialization and allocation for thread_t structure */
static int thr_constructor(void *obj, int kmflags)
{
    thread_t *t = (thread_t *) obj;
 
    spinlock_initialize(&t->lock, "thread_t_lock");
    link_initialize(&t->rq_link);
    link_initialize(&t->wq_link);
    link_initialize(&t->th_link);
 
    /* call the architecture-specific part of the constructor */
    thr_constructor_arch(t);
   
#ifdef ARCH_HAS_FPU
#  ifdef CONFIG_FPU_LAZY
    t->saved_fpu_context = NULL;
#  else
    t->saved_fpu_context = slab_alloc(fpu_context_slab,kmflags);
    if (!t->saved_fpu_context)
        return -1;
#  endif
#endif  
 
    t->kstack = frame_alloc(STACK_FRAMES, FRAME_KA | kmflags);
    if (! t->kstack) {
#ifdef ARCH_HAS_FPU
        if (t->saved_fpu_context)
            slab_free(fpu_context_slab,t->saved_fpu_context);
#endif
        return -1;
    }
 
    return 0;
}
 
/** Destruction of thread_t object */
static int thr_destructor(void *obj)
{
    thread_t *t = (thread_t *) obj;
 
    /* call the architecture-specific part of the destructor */
    thr_destructor_arch(t);
 
    frame_free(KA2PA(t->kstack));
#ifdef ARCH_HAS_FPU
    if (t->saved_fpu_context)
        slab_free(fpu_context_slab,t->saved_fpu_context);
#endif
    return 1; /* One page freed */
}
 
/** Initialize threads
 *
 * Initialize kernel threads support.
 *
 */
void thread_init(void)
{
    THREAD = NULL;
    atomic_set(&nrdy,0);
    thread_slab = slab_cache_create("thread_slab",
                    sizeof(thread_t),0,
                    thr_constructor, thr_destructor, 0);
#ifdef ARCH_HAS_FPU
    fpu_context_slab = slab_cache_create("fpu_slab",
                         sizeof(fpu_context_t),
                         FPU_CONTEXT_ALIGN,
                         NULL, NULL, 0);
#endif
 
    btree_create(&threads_btree);
}
 
/** Make thread ready
 *
 * Switch thread t to the ready state.
 *
 * @param t Thread to make ready.
 *
 */
void thread_ready(thread_t *t)
{
    cpu_t *cpu;
    runq_t *r;
    ipl_t ipl;
    int i, avg;
 
    ipl = interrupts_disable();
 
    spinlock_lock(&t->lock);
 
    ASSERT(! (t->state == Ready));
 
    i = (t->priority < RQ_COUNT -1) ? ++t->priority : t->priority;
   
    cpu = CPU;
    if (t->flags & THREAD_FLAG_WIRED) {
        cpu = t->cpu;
    }
    t->state = Ready;
    spinlock_unlock(&t->lock);
   
    /*
     * Append t to respective ready queue on respective processor.
     */
    r = &cpu->rq[i];
    spinlock_lock(&r->lock);
    list_append(&t->rq_link, &r->rq_head);
    r->n++;
    spinlock_unlock(&r->lock);
 
    atomic_inc(&nrdy);
    avg = atomic_get(&nrdy) / config.cpu_active;
    atomic_inc(&cpu->nrdy);
 
    interrupts_restore(ipl);
}
 
/** Destroy thread memory structure
 *
 * Detach thread from all queues, cpus etc. and destroy it.
 *
 * Assume thread->lock is held!!
 */
void thread_destroy(thread_t *t)
{
    bool destroy_task = false; 
 
    ASSERT(t->state == Exiting || t->state == Undead);
    ASSERT(t->task);
    ASSERT(t->cpu);
 
    spinlock_lock(&t->cpu->lock);
    if(t->cpu->fpu_owner==t)
        t->cpu->fpu_owner=NULL;
    spinlock_unlock(&t->cpu->lock);
 
    spinlock_unlock(&t->lock);
 
    spinlock_lock(&threads_lock);
    btree_remove(&threads_btree, (btree_key_t) ((uintptr_t ) t), NULL);
    spinlock_unlock(&threads_lock);
 
    /*
     * Detach from the containing task.
     */
    spinlock_lock(&t->task->lock);
    list_remove(&t->th_link);
    if (--t->task->refcount == 0) {
        t->task->accept_new_threads = false;
        destroy_task = true;
    }
    spinlock_unlock(&t->task->lock);   
   
    if (destroy_task)
        task_destroy(t->task);
   
    slab_free(thread_slab, t);
}
 
/** Create new thread
 *
 * Create a new thread.
 *
 * @param func  Thread's implementing function.
 * @param arg   Thread's implementing function argument.
 * @param task  Task to which the thread belongs.
 * @param flags Thread flags.
 * @param name  Symbolic name.
 *
 * @return New thread's structure on success, NULL on failure.
 *
 */
thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags, char *name)
{
    thread_t *t;
    ipl_t ipl;
   
    t = (thread_t *) slab_alloc(thread_slab, 0);
    if (!t)
        return NULL;
   
    /* Not needed, but good for debugging */
    memsetb((uintptr_t) t->kstack, THREAD_STACK_SIZE * 1 << STACK_FRAMES, 0);
   
    ipl = interrupts_disable();
    spinlock_lock(&tidlock);
    t->tid = ++last_tid;
    spinlock_unlock(&tidlock);
    interrupts_restore(ipl);
   
    context_save(&t->saved_context);
    context_set(&t->saved_context, FADDR(cushion), (uintptr_t) t->kstack, THREAD_STACK_SIZE);
   
    the_initialize((the_t *) t->kstack);
   
    ipl = interrupts_disable();
    t->saved_context.ipl = interrupts_read();
    interrupts_restore(ipl);
   
    memcpy(t->name, name, THREAD_NAME_BUFLEN);
   
    t->thread_code = func;
    t->thread_arg = arg;
    t->ticks = -1;
    t->cycles = 0;
    t->priority = -1;       /* start in rq[0] */
    t->cpu = NULL;
    t->flags = flags;
    t->state = Entering;
    t->call_me = NULL;
    t->call_me_with = NULL;
   
    timeout_initialize(&t->sleep_timeout);
    t->sleep_interruptible = false;
    t->sleep_queue = NULL;
    t->timeout_pending = 0;
 
    t->in_copy_from_uspace = false;
    t->in_copy_to_uspace = false;
 
    t->interrupted = false;
    t->join_type = None;
    t->detached = false;
    waitq_initialize(&t->join_wq);
   
    t->rwlock_holder_type = RWLOCK_NONE;
       
    t->task = task;
   
    t->fpu_context_exists = 0;
    t->fpu_context_engaged = 0;
 
    thread_create_arch(t);      /* might depend on previous initialization */
   
    /*
     * Attach to the containing task.
     */
    ipl = interrupts_disable();  
    spinlock_lock(&task->lock);
    if (!task->accept_new_threads) {
        spinlock_unlock(&task->lock);
        slab_free(thread_slab, t);
        interrupts_restore(ipl);
        return NULL;
    }
    list_append(&t->th_link, &task->th_head);
    if (task->refcount++ == 0)
        task->main_thread = t;
    spinlock_unlock(&task->lock);
 
    /*
     * Register this thread in the system-wide list.
     */
    spinlock_lock(&threads_lock);
    btree_insert(&threads_btree, (btree_key_t) ((uintptr_t) t), (void *) t, NULL);
    spinlock_unlock(&threads_lock);
   
    interrupts_restore(ipl);
   
    return t;
}
 
/** Terminate thread.
 *
 * End current thread execution and switch it to the exiting
 * 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();
 
    /* Not reached */
    while (1)
        ;
}
 
 
/** Thread sleep
 *
 * Suspend execution of the current thread.
 *
 * @param sec Number of seconds to sleep.
 *
 */
void thread_sleep(uint32_t sec)
{
    thread_usleep(sec*1000000);
}
 
/** Wait for another thread to exit.
 *
 * @param t Thread to join on exit.
 * @param usec Timeout in microseconds.
 * @param flags Mode of operation.
 *
 * @return An error code from errno.h or an error code from synch.h.
 */
int thread_join_timeout(thread_t *t, uint32_t usec, int flags)
{
    ipl_t ipl;
    int rc;
 
    if (t == THREAD)
        return EINVAL;
 
    /*
     * Since thread join can only be called once on an undetached thread,
     * the thread pointer is guaranteed to be still valid.
     */
   
    ipl = interrupts_disable();
    spinlock_lock(&t->lock);
    ASSERT(!t->detached);
    spinlock_unlock(&t->lock);
    interrupts_restore(ipl);
   
    rc = waitq_sleep_timeout(&t->join_wq, usec, flags);
   
    return rc; 
}
 
/** Detach thread.
 *
 * Mark the thread as detached, if the thread is already in the Undead state,
 * deallocate its resources.
 *
 * @param t Thread to be detached.
 */
void thread_detach(thread_t *t)
{
    ipl_t ipl;
 
    /*
     * Since the thread is expected to not be already detached,
     * pointer to it must be still valid.
     */
    ipl = interrupts_disable();
    spinlock_lock(&t->lock);
    ASSERT(!t->detached);
    if (t->state == Undead) {
        thread_destroy(t);  /* unlocks &t->lock */
        interrupts_restore(ipl);
        return;
    } else {
        t->detached = true;
    }
    spinlock_unlock(&t->lock);
    interrupts_restore(ipl);
}
 
/** Thread usleep
 *
 * Suspend execution of the current thread.
 *
 * @param usec Number of microseconds to sleep.
 *
 */
void thread_usleep(uint32_t usec)
{
    waitq_t wq;
                 
    waitq_initialize(&wq);
 
    (void) waitq_sleep_timeout(&wq, usec, SYNCH_FLAGS_NON_BLOCKING);
}
 
/** Register thread out-of-context invocation
 *
 * Register a function and its argument to be executed
 * on next context switch to the current thread.
 *
 * @param call_me      Out-of-context function.
 * @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);
}
 
/** Print list of threads debug info */
void thread_print_list(void)
{
    link_t *cur;
    ipl_t ipl;
   
    /* Messing with thread structures, avoid deadlock */
    ipl = interrupts_disable();
    spinlock_lock(&threads_lock);
   
    printf("tid    name       address    state    task       ctx code       stack      cycles     cpu  kst        wq\n");
    printf("------ ---------- ---------- -------- ---------- --- ---------- ---------- ---------- ---- ---------- ----------\n");
 
    for (cur = threads_btree.leaf_head.next; cur != &threads_btree.leaf_head; cur = cur->next) {
        btree_node_t *node;
        int i;
 
        node = list_get_instance(cur, btree_node_t, leaf_link);
        for (i = 0; i < node->keys; i++) {
            thread_t *t;
       
            t = (thread_t *) node->value[i];
           
            uint64_t cycles;
            char suffix;
           
            if (t->cycles > 1000000000000000000LL) {
                cycles = t->cycles / 1000000000000000000LL;
                suffix = 'E';
            } else if (t->cycles > 1000000000000LL) {
                cycles = t->cycles / 1000000000000LL;
                suffix = 'T';
            } else if (t->cycles > 1000000LL) {
                cycles = t->cycles / 1000000LL;
                suffix = 'M';
            } else {
                cycles = t->cycles;
                suffix = ' ';
            }
           
            printf("%-6zd %-10s %#10zx %-8s %#10zx %-3ld %#10zx %#10zx %9llu%c ", t->tid, t->name, t, thread_states[t->state], t->task, t->task->context, t->thread_code, t->kstack, cycles, suffix);
           
            if (t->cpu)
                printf("%-4zd", t->cpu->id);
            else
                printf("none");
           
            if (t->state == Sleeping)
 
                printf(" %#10zx %#10zx", t->kstack, t->sleep_queue);
           
            printf("\n");
        }
    }
 
    spinlock_unlock(&threads_lock);
    interrupts_restore(ipl);
}
 
/** Check whether thread exists.
 *
 * Note that threads_lock must be already held and
 * interrupts must be already disabled.
 *
 * @param t Pointer to thread.
 *
 * @return True if thread t is known to the system, false otherwise.
 */
bool thread_exists(thread_t *t)
{
    btree_node_t *leaf;
   
    return btree_search(&threads_btree, (btree_key_t) ((uintptr_t) t), &leaf) != NULL;
}
 
 
/** Update accounting of current thread.
 *
 * Note that thread_lock on THREAD must be already held and
 * interrupts must be already disabled.
 *
 * @param t Pointer to thread.
 *
 */
void thread_update_accounting(void)
{
    uint64_t time = get_cycle();
    THREAD->cycles += time - THREAD->last_cycle;
    THREAD->last_cycle = time;
}
 
/** Process syscall to create new thread.
 *
 */
unative_t sys_thread_create(uspace_arg_t *uspace_uarg, char *uspace_name)
{
    thread_t *t;
    char namebuf[THREAD_NAME_BUFLEN];
    uspace_arg_t *kernel_uarg;
    uint32_t tid;
    int rc;
 
    rc = copy_from_uspace(namebuf, uspace_name, THREAD_NAME_BUFLEN);
    if (rc != 0)
        return (unative_t) rc;
 
    kernel_uarg = (uspace_arg_t *) malloc(sizeof(uspace_arg_t), 0);
    rc = copy_from_uspace(kernel_uarg, uspace_uarg, sizeof(uspace_arg_t));
    if (rc != 0) {
        free(kernel_uarg);
        return (unative_t) rc;
    }
 
    if ((t = thread_create(uinit, kernel_uarg, TASK, THREAD_FLAG_USPACE, namebuf))) {
        tid = t->tid;
        thread_ready(t);
        return (unative_t) tid;
    } else {
        free(kernel_uarg);
    }
 
    return (unative_t) ENOMEM;
}
 
/** Process syscall to terminate thread.
 *
 */
unative_t sys_thread_exit(int uspace_status)
{
    thread_exit();
    /* Unreachable */
    return 0;
}
 
/** @}
 */
 

Rev 1854	Rev 2030
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	/** @addtogroup genericproc	29	/** @addtogroup genericproc
30	* @{	30	* @{
31	*/	31	*/
32		32
33	/**	33	/**
34	* @file	34	* @file
35	* @brief Thread management functions.	35	* @brief Thread management functions.
36	*/	36	*/
37		37
38	#include <proc/scheduler.h>	38	#include <proc/scheduler.h>
39	#include <proc/thread.h>	39	#include <proc/thread.h>
40	#include <proc/task.h>	40	#include <proc/task.h>
41	#include <proc/uarg.h>	41	#include <proc/uarg.h>
42	#include <mm/frame.h>	42	#include <mm/frame.h>
43	#include <mm/page.h>	43	#include <mm/page.h>
44	#include <arch/asm.h>	44	#include <arch/asm.h>
-		45	#include <arch/cycle.h>
45	#include <arch.h>	46	#include <arch.h>
46	#include <synch/synch.h>	47	#include <synch/synch.h>
47	#include <synch/spinlock.h>	48	#include <synch/spinlock.h>
48	#include <synch/waitq.h>	49	#include <synch/waitq.h>
49	#include <synch/rwlock.h>	50	#include <synch/rwlock.h>
50	#include <cpu.h>	51	#include <cpu.h>
51	#include <func.h>	52	#include <func.h>
52	#include <context.h>	53	#include <context.h>
53	#include <adt/btree.h>	54	#include <adt/btree.h>
54	#include <adt/list.h>	55	#include <adt/list.h>
55	#include <typedefs.h>	56	#include <typedefs.h>
56	#include <time/clock.h>	57	#include <time/clock.h>
57	#include <config.h>	58	#include <config.h>
58	#include <arch/interrupt.h>	59	#include <arch/interrupt.h>
59	#include <smp/ipi.h>	60	#include <smp/ipi.h>
60	#include <arch/faddr.h>	61	#include <arch/faddr.h>
61	#include <atomic.h>	62	#include <atomic.h>
62	#include <memstr.h>	63	#include <memstr.h>
63	#include <print.h>	64	#include <print.h>
64	#include <mm/slab.h>	65	#include <mm/slab.h>
65	#include <debug.h>	66	#include <debug.h>
66	#include <main/uinit.h>	67	#include <main/uinit.h>
67	#include <syscall/copy.h>	68	#include <syscall/copy.h>
68	#include <errno.h>	69	#include <errno.h>
69		70
70		71
71	/** Thread states */	72	/** Thread states */
72	char *thread_states[] = {	73	char *thread_states[] = {
73	"Invalid",	74	"Invalid",
74	"Running",	75	"Running",
75	"Sleeping",	76	"Sleeping",
76	"Ready",	77	"Ready",
77	"Entering",	78	"Entering",
78	"Exiting",	79	"Exiting",
79	"Undead"	80	"Undead"
80	};	81	};
81		82
82	/** Lock protecting the threads_btree B+tree. For locking rules, see declaration thereof. */	83	/** Lock protecting the threads_btree B+tree. For locking rules, see declaration thereof. */
83	SPINLOCK_INITIALIZE(threads_lock);	84	SPINLOCK_INITIALIZE(threads_lock);
84		85
85	/** B+tree of all threads.	86	/** B+tree of all threads.
86	*	87	*
87	* When a thread is found in the threads_btree B+tree, it is guaranteed to exist as long	88	* When a thread is found in the threads_btree B+tree, it is guaranteed to exist as long
88	* as the threads_lock is held.	89	* as the threads_lock is held.
89	*/	90	*/
90	btree_t threads_btree;	91	btree_t threads_btree;
91		92
92	SPINLOCK_INITIALIZE(tidlock);	93	SPINLOCK_INITIALIZE(tidlock);
93	uint32_t last_tid = 0;	94	uint32_t last_tid = 0;
94		95
95	static slab_cache_t *thread_slab;	96	static slab_cache_t *thread_slab;
96	#ifdef ARCH_HAS_FPU	97	#ifdef ARCH_HAS_FPU
97	slab_cache_t *fpu_context_slab;	98	slab_cache_t *fpu_context_slab;
98	#endif	99	#endif
99		100
100	/** Thread wrapper	101	/** Thread wrapper
101	*	102	*
102	* This wrapper is provided to ensure that every thread	103	* This wrapper is provided to ensure that every thread
103	* makes a call to thread_exit() when its implementing	104	* makes a call to thread_exit() when its implementing
104	* function returns.	105	* function returns.
105	*	106	*
106	* interrupts_disable() is assumed.	107	* interrupts_disable() is assumed.
107	*	108	*
108	*/	109	*/
109	static void cushion(void)	110	static void cushion(void)
110	{	111	{
111	void (f)(void ) = THREAD->thread_code;	112	void (f)(void ) = THREAD->thread_code;
112	void *arg = THREAD->thread_arg;	113	void *arg = THREAD->thread_arg;
113		114
114	/* this is where each thread wakes up after its creation */	115	/* this is where each thread wakes up after its creation */
115	spinlock_unlock(&THREAD->lock);	116	spinlock_unlock(&THREAD->lock);
116	interrupts_enable();	117	interrupts_enable();
117		118
118	f(arg);	119	f(arg);
119	thread_exit();	120	thread_exit();
120	/* not reached */	121	/* not reached */
121	}	122	}
122		123
123	/** Initialization and allocation for thread_t structure */	124	/** Initialization and allocation for thread_t structure */
124	static int thr_constructor(void *obj, int kmflags)	125	static int thr_constructor(void *obj, int kmflags)
125	{	126	{
126	thread_t t = (thread_t ) obj;	127	thread_t t = (thread_t ) obj;
127		128
128	spinlock_initialize(&t->lock, "thread_t_lock");	129	spinlock_initialize(&t->lock, "thread_t_lock");
129	link_initialize(&t->rq_link);	130	link_initialize(&t->rq_link);
130	link_initialize(&t->wq_link);	131	link_initialize(&t->wq_link);
131	link_initialize(&t->th_link);	132	link_initialize(&t->th_link);
132		133
133	/* call the architecture-specific part of the constructor */	134	/* call the architecture-specific part of the constructor */
134	thr_constructor_arch(t);	135	thr_constructor_arch(t);
135		136
136	#ifdef ARCH_HAS_FPU	137	#ifdef ARCH_HAS_FPU
137	# ifdef CONFIG_FPU_LAZY	138	# ifdef CONFIG_FPU_LAZY
138	t->saved_fpu_context = NULL;	139	t->saved_fpu_context = NULL;
139	# else	140	# else
140	t->saved_fpu_context = slab_alloc(fpu_context_slab,kmflags);	141	t->saved_fpu_context = slab_alloc(fpu_context_slab,kmflags);
141	if (!t->saved_fpu_context)	142	if (!t->saved_fpu_context)
142	return -1;	143	return -1;
143	# endif	144	# endif
144	#endif	145	#endif
145		146
146	t->kstack = frame_alloc(STACK_FRAMES, FRAME_KA \| kmflags);	147	t->kstack = frame_alloc(STACK_FRAMES, FRAME_KA \| kmflags);
147	if (! t->kstack) {	148	if (! t->kstack) {
148	#ifdef ARCH_HAS_FPU	149	#ifdef ARCH_HAS_FPU
149	if (t->saved_fpu_context)	150	if (t->saved_fpu_context)
150	slab_free(fpu_context_slab,t->saved_fpu_context);	151	slab_free(fpu_context_slab,t->saved_fpu_context);
151	#endif	152	#endif
152	return -1;	153	return -1;
153	}	154	}
154		155
155	return 0;	156	return 0;
156	}	157	}
157		158
158	/** Destruction of thread_t object */	159	/** Destruction of thread_t object */
159	static int thr_destructor(void *obj)	160	static int thr_destructor(void *obj)
160	{	161	{
161	thread_t t = (thread_t ) obj;	162	thread_t t = (thread_t ) obj;
162		163
163	/* call the architecture-specific part of the destructor */	164	/* call the architecture-specific part of the destructor */
164	thr_destructor_arch(t);	165	thr_destructor_arch(t);
165		166
166	frame_free(KA2PA(t->kstack));	167	frame_free(KA2PA(t->kstack));
167	#ifdef ARCH_HAS_FPU	168	#ifdef ARCH_HAS_FPU
168	if (t->saved_fpu_context)	169	if (t->saved_fpu_context)
169	slab_free(fpu_context_slab,t->saved_fpu_context);	170	slab_free(fpu_context_slab,t->saved_fpu_context);
170	#endif	171	#endif
171	return 1; /* One page freed */	172	return 1; /* One page freed */
172	}	173	}
173		174
174	/** Initialize threads	175	/** Initialize threads
175	*	176	*
176	* Initialize kernel threads support.	177	* Initialize kernel threads support.
177	*	178	*
178	*/	179	*/
179	void thread_init(void)	180	void thread_init(void)
180	{	181	{
181	THREAD = NULL;	182	THREAD = NULL;
182	atomic_set(&nrdy,0);	183	atomic_set(&nrdy,0);
183	thread_slab = slab_cache_create("thread_slab",	184	thread_slab = slab_cache_create("thread_slab",
184	sizeof(thread_t),0,	185	sizeof(thread_t),0,
185	thr_constructor, thr_destructor, 0);	186	thr_constructor, thr_destructor, 0);
186	#ifdef ARCH_HAS_FPU	187	#ifdef ARCH_HAS_FPU
187	fpu_context_slab = slab_cache_create("fpu_slab",	188	fpu_context_slab = slab_cache_create("fpu_slab",
188	sizeof(fpu_context_t),	189	sizeof(fpu_context_t),
189	FPU_CONTEXT_ALIGN,	190	FPU_CONTEXT_ALIGN,
190	NULL, NULL, 0);	191	NULL, NULL, 0);
191	#endif	192	#endif
192		193
193	btree_create(&threads_btree);	194	btree_create(&threads_btree);
194	}	195	}
195		196
196	/** Make thread ready	197	/** Make thread ready
197	*	198	*
198	* Switch thread t to the ready state.	199	* Switch thread t to the ready state.
199	*	200	*
200	* @param t Thread to make ready.	201	* @param t Thread to make ready.
201	*	202	*
202	*/	203	*/
203	void thread_ready(thread_t *t)	204	void thread_ready(thread_t *t)
204	{	205	{
205	cpu_t *cpu;	206	cpu_t *cpu;
206	runq_t *r;	207	runq_t *r;
207	ipl_t ipl;	208	ipl_t ipl;
208	int i, avg;	209	int i, avg;
209		210
210	ipl = interrupts_disable();	211	ipl = interrupts_disable();
211		212
212	spinlock_lock(&t->lock);	213	spinlock_lock(&t->lock);
213		214
214	ASSERT(! (t->state == Ready));	215	ASSERT(! (t->state == Ready));
215		216
216	i = (t->priority < RQ_COUNT -1) ? ++t->priority : t->priority;	217	i = (t->priority < RQ_COUNT -1) ? ++t->priority : t->priority;
217		218
218	cpu = CPU;	219	cpu = CPU;
219	if (t->flags & THREAD_FLAG_WIRED) {	220	if (t->flags & THREAD_FLAG_WIRED) {
220	cpu = t->cpu;	221	cpu = t->cpu;
221	}	222	}
222	t->state = Ready;	223	t->state = Ready;
223	spinlock_unlock(&t->lock);	224	spinlock_unlock(&t->lock);
224		225
225	/*	226	/*
226	* Append t to respective ready queue on respective processor.	227	* Append t to respective ready queue on respective processor.
227	*/	228	*/
228	r = &cpu->rq[i];	229	r = &cpu->rq[i];
229	spinlock_lock(&r->lock);	230	spinlock_lock(&r->lock);
230	list_append(&t->rq_link, &r->rq_head);	231	list_append(&t->rq_link, &r->rq_head);
231	r->n++;	232	r->n++;
232	spinlock_unlock(&r->lock);	233	spinlock_unlock(&r->lock);
233		234
234	atomic_inc(&nrdy);	235	atomic_inc(&nrdy);
235	avg = atomic_get(&nrdy) / config.cpu_active;	236	avg = atomic_get(&nrdy) / config.cpu_active;
236	atomic_inc(&cpu->nrdy);	237	atomic_inc(&cpu->nrdy);
237		238
238	interrupts_restore(ipl);	239	interrupts_restore(ipl);
239	}	240	}
240		241
241	/** Destroy thread memory structure	242	/** Destroy thread memory structure
242	*	243	*
243	* Detach thread from all queues, cpus etc. and destroy it.	244	* Detach thread from all queues, cpus etc. and destroy it.
244	*	245	*
245	* Assume thread->lock is held!!	246	* Assume thread->lock is held!!
246	*/	247	*/
247	void thread_destroy(thread_t *t)	248	void thread_destroy(thread_t *t)
248	{	249	{
249	bool destroy_task = false;	250	bool destroy_task = false;
250		251
251	ASSERT(t->state == Exiting \|\| t->state == Undead);	252	ASSERT(t->state == Exiting \|\| t->state == Undead);
252	ASSERT(t->task);	253	ASSERT(t->task);
253	ASSERT(t->cpu);	254	ASSERT(t->cpu);
254		255
255	spinlock_lock(&t->cpu->lock);	256	spinlock_lock(&t->cpu->lock);
256	if(t->cpu->fpu_owner==t)	257	if(t->cpu->fpu_owner==t)
257	t->cpu->fpu_owner=NULL;	258	t->cpu->fpu_owner=NULL;
258	spinlock_unlock(&t->cpu->lock);	259	spinlock_unlock(&t->cpu->lock);
259		260
260	spinlock_unlock(&t->lock);	261	spinlock_unlock(&t->lock);
261		262
262	spinlock_lock(&threads_lock);	263	spinlock_lock(&threads_lock);
263	btree_remove(&threads_btree, (btree_key_t) ((uintptr_t ) t), NULL);	264	btree_remove(&threads_btree, (btree_key_t) ((uintptr_t ) t), NULL);
264	spinlock_unlock(&threads_lock);	265	spinlock_unlock(&threads_lock);
265		266
266	/*	267	/*
267	* Detach from the containing task.	268	* Detach from the containing task.
268	*/	269	*/
269	spinlock_lock(&t->task->lock);	270	spinlock_lock(&t->task->lock);
270	list_remove(&t->th_link);	271	list_remove(&t->th_link);
271	if (--t->task->refcount == 0) {	272	if (--t->task->refcount == 0) {
272	t->task->accept_new_threads = false;	273	t->task->accept_new_threads = false;
273	destroy_task = true;	274	destroy_task = true;
274	}	275	}
275	spinlock_unlock(&t->task->lock);	276	spinlock_unlock(&t->task->lock);
276		277
277	if (destroy_task)	278	if (destroy_task)
278	task_destroy(t->task);	279	task_destroy(t->task);
279		280
280	slab_free(thread_slab, t);	281	slab_free(thread_slab, t);
281	}	282	}
282		283
283	/** Create new thread	284	/** Create new thread
284	*	285	*
285	* Create a new thread.	286	* Create a new thread.
286	*	287	*
287	* @param func Thread's implementing function.	288	* @param func Thread's implementing function.
288	* @param arg Thread's implementing function argument.	289	* @param arg Thread's implementing function argument.
289	* @param task Task to which the thread belongs.	290	* @param task Task to which the thread belongs.
290	* @param flags Thread flags.	291	* @param flags Thread flags.
291	* @param name Symbolic name.	292	* @param name Symbolic name.
292	*	293	*
293	* @return New thread's structure on success, NULL on failure.	294	* @return New thread's structure on success, NULL on failure.
294	*	295	*
295	*/	296	*/
296	thread_t thread_create(void ( func)(void ), void arg, task_t task, int flags, char name)	297	thread_t thread_create(void ( func)(void ), void arg, task_t task, int flags, char name)
297	{	298	{
298	thread_t *t;	299	thread_t *t;
299	ipl_t ipl;	300	ipl_t ipl;
300		301
301	t = (thread_t *) slab_alloc(thread_slab, 0);	302	t = (thread_t *) slab_alloc(thread_slab, 0);
302	if (!t)	303	if (!t)
303	return NULL;	304	return NULL;
304		305
305	/* Not needed, but good for debugging */	306	/* Not needed, but good for debugging */
306	memsetb((uintptr_t) t->kstack, THREAD_STACK_SIZE * 1 << STACK_FRAMES, 0);	307	memsetb((uintptr_t) t->kstack, THREAD_STACK_SIZE * 1 << STACK_FRAMES, 0);
307		308
308	ipl = interrupts_disable();	309	ipl = interrupts_disable();
309	spinlock_lock(&tidlock);	310	spinlock_lock(&tidlock);
310	t->tid = ++last_tid;	311	t->tid = ++last_tid;
311	spinlock_unlock(&tidlock);	312	spinlock_unlock(&tidlock);
312	interrupts_restore(ipl);	313	interrupts_restore(ipl);
313		314
314	context_save(&t->saved_context);	315	context_save(&t->saved_context);
315	context_set(&t->saved_context, FADDR(cushion), (uintptr_t) t->kstack, THREAD_STACK_SIZE);	316	context_set(&t->saved_context, FADDR(cushion), (uintptr_t) t->kstack, THREAD_STACK_SIZE);
316		317
317	the_initialize((the_t *) t->kstack);	318	the_initialize((the_t *) t->kstack);
318		319
319	ipl = interrupts_disable();	320	ipl = interrupts_disable();
320	t->saved_context.ipl = interrupts_read();	321	t->saved_context.ipl = interrupts_read();
321	interrupts_restore(ipl);	322	interrupts_restore(ipl);
322		323
323	memcpy(t->name, name, THREAD_NAME_BUFLEN);	324	memcpy(t->name, name, THREAD_NAME_BUFLEN);
324		325
325	t->thread_code = func;	326	t->thread_code = func;
326	t->thread_arg = arg;	327	t->thread_arg = arg;
327	t->ticks = -1;	328	t->ticks = -1;
-		329	t->cycles = 0;
328	t->priority = -1; /* start in rq[0] */	330	t->priority = -1; /* start in rq[0] */
329	t->cpu = NULL;	331	t->cpu = NULL;
330	t->flags = flags;	332	t->flags = flags;
331	t->state = Entering;	333	t->state = Entering;
332	t->call_me = NULL;	334	t->call_me = NULL;
333	t->call_me_with = NULL;	335	t->call_me_with = NULL;
334		336
335	timeout_initialize(&t->sleep_timeout);	337	timeout_initialize(&t->sleep_timeout);
336	t->sleep_interruptible = false;	338	t->sleep_interruptible = false;
337	t->sleep_queue = NULL;	339	t->sleep_queue = NULL;
338	t->timeout_pending = 0;	340	t->timeout_pending = 0;
339		341
340	t->in_copy_from_uspace = false;	342	t->in_copy_from_uspace = false;
341	t->in_copy_to_uspace = false;	343	t->in_copy_to_uspace = false;
342		344
343	t->interrupted = false;	345	t->interrupted = false;
344	t->join_type = None;	346	t->join_type = None;
345	t->detached = false;	347	t->detached = false;
346	waitq_initialize(&t->join_wq);	348	waitq_initialize(&t->join_wq);
347		349
348	t->rwlock_holder_type = RWLOCK_NONE;	350	t->rwlock_holder_type = RWLOCK_NONE;
349		351
350	t->task = task;	352	t->task = task;
351		353
352	t->fpu_context_exists = 0;	354	t->fpu_context_exists = 0;
353	t->fpu_context_engaged = 0;	355	t->fpu_context_engaged = 0;
354		356
355	thread_create_arch(t); /* might depend on previous initialization */	357	thread_create_arch(t); /* might depend on previous initialization */
356		358
357	/*	359	/*
358	* Attach to the containing task.	360	* Attach to the containing task.
359	*/	361	*/
360	ipl = interrupts_disable();	362	ipl = interrupts_disable();
361	spinlock_lock(&task->lock);	363	spinlock_lock(&task->lock);
362	if (!task->accept_new_threads) {	364	if (!task->accept_new_threads) {
363	spinlock_unlock(&task->lock);	365	spinlock_unlock(&task->lock);
364	slab_free(thread_slab, t);	366	slab_free(thread_slab, t);
365	interrupts_restore(ipl);	367	interrupts_restore(ipl);
366	return NULL;	368	return NULL;
367	}	369	}
368	list_append(&t->th_link, &task->th_head);	370	list_append(&t->th_link, &task->th_head);
369	if (task->refcount++ == 0)	371	if (task->refcount++ == 0)
370	task->main_thread = t;	372	task->main_thread = t;
371	spinlock_unlock(&task->lock);	373	spinlock_unlock(&task->lock);
372		374
373	/*	375	/*
374	* Register this thread in the system-wide list.	376	* Register this thread in the system-wide list.
375	*/	377	*/
376	spinlock_lock(&threads_lock);	378	spinlock_lock(&threads_lock);
377	btree_insert(&threads_btree, (btree_key_t) ((uintptr_t) t), (void *) t, NULL);	379	btree_insert(&threads_btree, (btree_key_t) ((uintptr_t) t), (void *) t, NULL);
378	spinlock_unlock(&threads_lock);	380	spinlock_unlock(&threads_lock);
379		381
380	interrupts_restore(ipl);	382	interrupts_restore(ipl);
381		383
382	return t;	384	return t;
383	}	385	}
384		386
385	/** Terminate thread.	387	/** Terminate thread.
386	*	388	*
387	* End current thread execution and switch it to the exiting	389	* End current thread execution and switch it to the exiting
388	* state. All pending timeouts are executed.	390	* state. All pending timeouts are executed.
389	*	391	*
390	*/	392	*/
391	void thread_exit(void)	393	void thread_exit(void)
392	{	394	{
393	ipl_t ipl;	395	ipl_t ipl;
394		396
395	restart:	397	restart:
396	ipl = interrupts_disable();	398	ipl = interrupts_disable();
397	spinlock_lock(&THREAD->lock);	399	spinlock_lock(&THREAD->lock);
398	if (THREAD->timeout_pending) { /* busy waiting for timeouts in progress */	400	if (THREAD->timeout_pending) { /* busy waiting for timeouts in progress */
399	spinlock_unlock(&THREAD->lock);	401	spinlock_unlock(&THREAD->lock);
400	interrupts_restore(ipl);	402	interrupts_restore(ipl);
401	goto restart;	403	goto restart;
402	}	404	}
403	THREAD->state = Exiting;	405	THREAD->state = Exiting;
404	spinlock_unlock(&THREAD->lock);	406	spinlock_unlock(&THREAD->lock);
405	scheduler();	407	scheduler();
406		408
407	/* Not reached */	409	/* Not reached */
408	while (1)	410	while (1)
409	;	411	;
410	}	412	}
411		413
412		414
413	/** Thread sleep	415	/** Thread sleep
414	*	416	*
415	* Suspend execution of the current thread.	417	* Suspend execution of the current thread.
416	*	418	*
417	* @param sec Number of seconds to sleep.	419	* @param sec Number of seconds to sleep.
418	*	420	*
419	*/	421	*/
420	void thread_sleep(uint32_t sec)	422	void thread_sleep(uint32_t sec)
421	{	423	{
422	thread_usleep(sec*1000000);	424	thread_usleep(sec*1000000);
423	}	425	}
424		426
425	/** Wait for another thread to exit.	427	/** Wait for another thread to exit.
426	*	428	*
427	* @param t Thread to join on exit.	429	* @param t Thread to join on exit.
428	* @param usec Timeout in microseconds.	430	* @param usec Timeout in microseconds.
429	* @param flags Mode of operation.	431	* @param flags Mode of operation.
430	*	432	*
431	* @return An error code from errno.h or an error code from synch.h.	433	* @return An error code from errno.h or an error code from synch.h.
432	*/	434	*/
433	int thread_join_timeout(thread_t *t, uint32_t usec, int flags)	435	int thread_join_timeout(thread_t *t, uint32_t usec, int flags)
434	{	436	{
435	ipl_t ipl;	437	ipl_t ipl;
436	int rc;	438	int rc;
437		439
438	if (t == THREAD)	440	if (t == THREAD)
439	return EINVAL;	441	return EINVAL;
440		442
441	/*	443	/*
442	* Since thread join can only be called once on an undetached thread,	444	* Since thread join can only be called once on an undetached thread,
443	* the thread pointer is guaranteed to be still valid.	445	* the thread pointer is guaranteed to be still valid.
444	*/	446	*/
445		447
446	ipl = interrupts_disable();	448	ipl = interrupts_disable();
447	spinlock_lock(&t->lock);	449	spinlock_lock(&t->lock);
448	ASSERT(!t->detached);	450	ASSERT(!t->detached);
449	spinlock_unlock(&t->lock);	451	spinlock_unlock(&t->lock);
450	interrupts_restore(ipl);	452	interrupts_restore(ipl);
451		453
452	rc = waitq_sleep_timeout(&t->join_wq, usec, flags);	454	rc = waitq_sleep_timeout(&t->join_wq, usec, flags);
453		455
454	return rc;	456	return rc;
455	}	457	}
456		458
457	/** Detach thread.	459	/** Detach thread.
458	*	460	*
459	* Mark the thread as detached, if the thread is already in the Undead state,	461	* Mark the thread as detached, if the thread is already in the Undead state,
460	* deallocate its resources.	462	* deallocate its resources.
461	*	463	*
462	* @param t Thread to be detached.	464	* @param t Thread to be detached.
463	*/	465	*/
464	void thread_detach(thread_t *t)	466	void thread_detach(thread_t *t)
465	{	467	{
466	ipl_t ipl;	468	ipl_t ipl;
467		469
468	/*	470	/*
469	* Since the thread is expected to not be already detached,	471	* Since the thread is expected to not be already detached,
470	* pointer to it must be still valid.	472	* pointer to it must be still valid.
471	*/	473	*/
472	ipl = interrupts_disable();	474	ipl = interrupts_disable();
473	spinlock_lock(&t->lock);	475	spinlock_lock(&t->lock);
474	ASSERT(!t->detached);	476	ASSERT(!t->detached);
475	if (t->state == Undead) {	477	if (t->state == Undead) {
476	thread_destroy(t); /* unlocks &t->lock */	478	thread_destroy(t); /* unlocks &t->lock */
477	interrupts_restore(ipl);	479	interrupts_restore(ipl);
478	return;	480	return;
479	} else {	481	} else {
480	t->detached = true;	482	t->detached = true;
481	}	483	}
482	spinlock_unlock(&t->lock);	484	spinlock_unlock(&t->lock);
483	interrupts_restore(ipl);	485	interrupts_restore(ipl);
484	}	486	}
485		487
486	/** Thread usleep	488	/** Thread usleep
487	*	489	*
488	* Suspend execution of the current thread.	490	* Suspend execution of the current thread.
489	*	491	*
490	* @param usec Number of microseconds to sleep.	492	* @param usec Number of microseconds to sleep.
491	*	493	*
492	*/	494	*/
493	void thread_usleep(uint32_t usec)	495	void thread_usleep(uint32_t usec)
494	{	496	{
495	waitq_t wq;	497	waitq_t wq;
496		498
497	waitq_initialize(&wq);	499	waitq_initialize(&wq);
498		500

Subversion Repositories HelenOS

(root)/branches/tracing/kernel/generic/src/proc/thread.c @ 3623 – Rev 1854 → 2030