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 * @return New task's structure on success, NULL on failure.
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 * @return New task's structure on success, NULL on failure.
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 *
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 *
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 */
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 */
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task_t *task_create(vm_t *m)
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task_t *task_create(vm_t *m)
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{
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{
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    pri_t pri;
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    ipl_t ipl;
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    task_t *ta;
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    task_t *ta;
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    ta = (task_t *) malloc(sizeof(task_t));
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    ta = (task_t *) malloc(sizeof(task_t));
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    if (ta) {
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    if (ta) {
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        spinlock_initialize(&ta->lock);
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        spinlock_initialize(&ta->lock);
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        list_initialize(&ta->th_head);
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        list_initialize(&ta->th_head);
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        list_initialize(&ta->tasks_link);
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        list_initialize(&ta->tasks_link);
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        ta->vm = m;
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        ta->vm = m;
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        pri = cpu_priority_high();
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        ipl = interrupts_disable();
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        spinlock_lock(&tasks_lock);
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        spinlock_lock(&tasks_lock);
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        list_append(&ta->tasks_link, &tasks_head);
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        list_append(&ta->tasks_link, &tasks_head);
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        spinlock_unlock(&tasks_lock);
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        spinlock_unlock(&tasks_lock);
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        cpu_priority_restore(pri);
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        interrupts_restore(ipl);
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    }
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    }
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    return ta;
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    return ta;
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}
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}
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