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/*
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/*
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 * Copyright (c) 2001-2004 Jakub Jermar
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 * Copyright (c) 2001-2007 Jakub Jermar
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 * All rights reserved.
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 * All rights reserved.
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 *
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * are met:
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#include <synch/waitq.h>
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#include <synch/waitq.h>
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#include <proc/task.h>
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#include <proc/task.h>
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#include <time/timeout.h>
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#include <time/timeout.h>
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#include <cpu.h>
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#include <cpu.h>
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#include <synch/rwlock.h>
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#include <synch/rwlock.h>
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#include <synch/spinlock.h>
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#include <adt/btree.h>
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#include <adt/btree.h>
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#include <mm/slab.h>
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#include <mm/slab.h>
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#include <arch/cpu.h>
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#include <arch/cpu.h>
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#include <mm/tlb.h>
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#include <mm/tlb.h>
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#include <proc/uarg.h>
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#include <proc/uarg.h>
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    Ready,
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    Ready,
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    /** Threads are in this state before they are first readied. */
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    /** Threads are in this state before they are first readied. */
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    Entering,
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    Entering,
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    /** After a thread calls thread_exit(), it is put into Exiting state. */
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    /** After a thread calls thread_exit(), it is put into Exiting state. */
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    Exiting,
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    Exiting,
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    /** Threads that were not detached but exited are in the Undead state. */
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    /** Threads that were not detached but exited are in the JoinMe state. */
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    Undead
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    JoinMe
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} state_t;
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} state_t;
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/** Join types. */
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typedef enum {
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    None,
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    TaskClnp,   /**< The thread will be joined by ktaskclnp thread. */
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    TaskGC      /**< The thread will be joined by ktaskgc thread. */
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} thread_join_type_t;
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/** Thread structure. There is one per thread. */
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/** Thread structure. There is one per thread. */
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typedef struct thread {
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typedef struct thread {
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    link_t rq_link;     /**< Run queue link. */
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    link_t rq_link;     /**< Run queue link. */
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    link_t wq_link;     /**< Wait queue link. */
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    link_t wq_link;     /**< Wait queue link. */
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    link_t th_link;     /**< Links to threads within containing task. */
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    link_t th_link;     /**< Links to threads within containing task. */
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     * If true, the thread will not go to sleep at all and will call
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     * If true, the thread will not go to sleep at all and will call
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     * thread_exit() before returning to userspace.
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     * thread_exit() before returning to userspace.
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     */
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     */
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    bool interrupted;          
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    bool interrupted;          
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    /** Who joinins the thread. */
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    thread_join_type_t join_type;
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    /** If true, thread_join_timeout() cannot be used on this thread. */
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    /** If true, thread_join_timeout() cannot be used on this thread. */
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    bool detached;
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    bool detached;
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    /** Waitq for thread_join_timeout(). */
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    /** Waitq for thread_join_timeout(). */
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    waitq_t join_wq;
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    waitq_t join_wq;
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    /** Link used in the joiner_head list. */
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    link_t joiner_link;
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    fpu_context_t *saved_fpu_context;
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    fpu_context_t *saved_fpu_context;
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    int fpu_context_exists;
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    int fpu_context_exists;
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    /*
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    /*