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/** Task structure. */
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/** Task structure. */
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typedef struct task {
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typedef struct task {
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    /** Task lock.
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    /** Task lock.
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     *
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     *
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     * Must be acquired before threads_lock and thread lock of any of its threads.
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     * Must be acquired before threads_lock and thread lock of any of its
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     * threads.
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     */
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     */
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    SPINLOCK_DECLARE(lock);
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    SPINLOCK_DECLARE(lock);
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    char *name;
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    char *name;
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    struct thread *main_thread; /**< Pointer to the main thread. */
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    /** Pointer to the main thread. */
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    struct thread *main_thread;
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    link_t th_head;     /**< List of threads contained in this task. */
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    /** List of threads contained in this task. */
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    link_t th_head;
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    as_t *as;       /**< Address space. */
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    /** Address space. */
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    as_t *as;
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    task_id_t taskid;   /**< Unique identity of task */
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    /** Unique identity of task. */
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    task_id_t taskid;
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    context_id_t context;   /**< Task security context */
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    /** Task security context. */
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    context_id_t context;  
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    /** If this is true, new threads can become part of the task. */
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    /** If this is true, new threads can become part of the task. */
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    bool accept_new_threads;
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    bool accept_new_threads;
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    /** Number of references (i.e. threads). */
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    count_t refcount;  
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    count_t refcount;   /**< Number of references (i.e. threads). */
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    /** Task capabilities. */
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    cap_t capabilities; /**< Task capabilities. */
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    cap_t capabilities;
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    /* IPC stuff */
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    /* IPC stuff */
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    answerbox_t answerbox;  /**< Communication endpoint */
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    answerbox_t answerbox;  /**< Communication endpoint */
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    phone_t phones[IPC_MAX_PHONES];
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    phone_t phones[IPC_MAX_PHONES];
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    atomic_t active_calls;  /**< Active asynchronous messages.
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    /**
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                 *   It is used for limiting uspace to
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     * Active asynchronous messages. It is used for limiting uspace to
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                 *   certain extent. */
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     * certain extent.
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     */
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    atomic_t active_calls;  
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    task_arch_t arch;   /**< Architecture specific task data. */
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    /** Architecture specific task data. */
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    task_arch_t arch;  
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    /**
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    /**
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     * Serializes access to the B+tree of task's futexes. This mutex is
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     * Serializes access to the B+tree of task's futexes. This mutex is
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     * independent on the task spinlock.
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     * independent on the task spinlock.
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     */
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     */
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    mutex_t futexes_lock;
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    mutex_t futexes_lock;
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    btree_t futexes;    /**< B+tree of futexes referenced by this task. */
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    /** B+tree of futexes referenced by this task. */
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    btree_t futexes;   
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    uint64_t cycles;    /**< Accumulated accounting. */
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    /** Accumulated accounting. */
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    uint64_t cycles;
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} task_t;
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} task_t;
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SPINLOCK_EXTERN(tasks_lock);
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SPINLOCK_EXTERN(tasks_lock);
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extern btree_t tasks_btree;
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extern btree_t tasks_btree;
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