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#ifndef FIBRIL_INITIAL_STACK_PAGES_NO
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#ifndef FIBRIL_INITIAL_STACK_PAGES_NO
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#define FIBRIL_INITIAL_STACK_PAGES_NO   1
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#define FIBRIL_INITIAL_STACK_PAGES_NO   1
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#endif
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#endif
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-
 
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/**
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/** This futex serializes access to ready_list, serialized_list and manage_list.
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 * This futex serializes access to ready_list, serialized_list and manager_list.
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 */
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 */
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static atomic_t fibril_futex = FUTEX_INITIALIZER;
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static atomic_t fibril_futex = FUTEX_INITIALIZER;
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static LIST_INITIALIZE(ready_list);
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static LIST_INITIALIZE(ready_list);
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static LIST_INITIALIZE(serialized_list);
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static LIST_INITIALIZE(serialized_list);
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static LIST_INITIALIZE(manager_list);
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static LIST_INITIALIZE(manager_list);
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static void fibril_main(void);
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static void fibril_main(void);
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/** Number of fibrils that are in async_serialized mode */
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/** Number of threads that are executing a manager fibril. */
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static int threads_in_manager;
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/** Number of threads that are executing a manager fibril and are serialized. */
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static int serialized_fibrils;  /* Protected by async_futex */
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static int serialized_threads;  /* Protected by async_futex */
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/** Thread-local count of serialization. If >0, we must not preempt */
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/** Thread-local count of serialization. If > 0, we must not preempt */
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static __thread int serialization_count;
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static __thread int serialization_count;
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/** Counter for fibrils residing in async_manager */
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static int fibrils_in_manager;
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/** Setup fibril information into TCB structure */
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/** Setup fibril information into TCB structure */
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fibril_t *fibril_setup(void)
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fibril_t *fibril_setup(void)
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{
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{
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    fibril_t *f;
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    fibril_t *f;
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    if (stype == FIBRIL_FROM_MANAGER) {
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    if (stype == FIBRIL_FROM_MANAGER) {
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        if (list_empty(&ready_list) && list_empty(&serialized_list))
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        if (list_empty(&ready_list) && list_empty(&serialized_list))
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            goto ret_0;
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            goto ret_0;
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        /*
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        /*
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         * Do not preempt if there is not sufficient count of fibril
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         * Do not preempt if there is not enough threads to run the
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         * managers.
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         * ready fibrils, which are not serialized.
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         */
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         */
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        if (list_empty(&serialized_list) &&
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        if (list_empty(&serialized_list) &&
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            fibrils_in_manager <= serialized_fibrils) {
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            threads_in_manager <= serialized_threads) {
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            goto ret_0;
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            goto ret_0;
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        }
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        }
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    }
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    }
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    /* If we are going to manager and none exists, create it */
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    /* If we are going to manager and none exists, create it */
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    if (stype == FIBRIL_TO_MANAGER || stype == FIBRIL_FROM_DEAD) {
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    if (stype == FIBRIL_TO_MANAGER || stype == FIBRIL_FROM_DEAD) {
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        /* Save myself to the correct run list */
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        /* Save myself to the correct run list */
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        if (stype == FIBRIL_PREEMPT)
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        if (stype == FIBRIL_PREEMPT)
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            list_append(&srcf->link, &ready_list);
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            list_append(&srcf->link, &ready_list);
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        else if (stype == FIBRIL_FROM_MANAGER) {
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        else if (stype == FIBRIL_FROM_MANAGER) {
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            list_append(&srcf->link, &manager_list);
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            list_append(&srcf->link, &manager_list);
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            fibrils_in_manager--;
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            threads_in_manager--;
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        } else {   
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        } else {   
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            /*
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            /*
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             * If stype == FIBRIL_TO_MANAGER, don't put ourselves to
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             * If stype == FIBRIL_TO_MANAGER, don't put ourselves to
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             * any list, we should already be somewhere, or we will
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             * any list, we should already be somewhere, or we will
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             * be lost.
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             * be lost.
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    /* Choose a new fibril to run */
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    /* Choose a new fibril to run */
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    if (stype == FIBRIL_TO_MANAGER || stype == FIBRIL_FROM_DEAD) {
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    if (stype == FIBRIL_TO_MANAGER || stype == FIBRIL_FROM_DEAD) {
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        dstf = list_get_instance(manager_list.next, fibril_t, link);
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        dstf = list_get_instance(manager_list.next, fibril_t, link);
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        if (serialization_count && stype == FIBRIL_TO_MANAGER) {
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        if (serialization_count && stype == FIBRIL_TO_MANAGER) {
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            serialized_fibrils++;
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            serialized_threads++;
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            srcf->flags |= FIBRIL_SERIALIZED;
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            srcf->flags |= FIBRIL_SERIALIZED;
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        }
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        }
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        fibrils_in_manager++;
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        threads_in_manager++;
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        if (stype == FIBRIL_FROM_DEAD)
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        if (stype == FIBRIL_FROM_DEAD)
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            dstf->clean_after_me = srcf;
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            dstf->clean_after_me = srcf;
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    } else {
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    } else {
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        if (!list_empty(&serialized_list)) {
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        if (!list_empty(&serialized_list)) {
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            dstf = list_get_instance(serialized_list.next, fibril_t,
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            dstf = list_get_instance(serialized_list.next, fibril_t,
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                link);
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                link);
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            serialized_fibrils--;
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            serialized_threads--;
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        } else {
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        } else {
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            dstf = list_get_instance(ready_list.next, fibril_t,
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            dstf = list_get_instance(ready_list.next, fibril_t,
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                link);
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                link);
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        }
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        }
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    }
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    }
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    return (fid_t) f;
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    return (fid_t) f;
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}
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}
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/** Add a fibril to the ready list.
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/** Add a fibril to the ready list.
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 *
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 *
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 * @param fid       Pinter to the fibril structure of the fibril to be
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 * @param fid       Pointer to the fibril structure of the fibril to be
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 *          added.
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 *          added.
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 */
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 */
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void fibril_add_ready(fid_t fid)
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void fibril_add_ready(fid_t fid)
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{
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{
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    fibril_t *f;
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    fibril_t *f;
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    futex_up(&fibril_futex);
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    futex_up(&fibril_futex);
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}
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}
287
 
288
 
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/** Add a fibril to the manager list.
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/** Add a fibril to the manager list.
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 *
290
 *
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 * @param fid       Pinter to the fibril structure of the fibril to be added.
291
 * @param fid       Pointer to the fibril structure of the fibril to be
-
 
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 *          added.
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 */
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 */
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void fibril_add_manager(fid_t fid)
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void fibril_add_manager(fid_t fid)
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{
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{
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    fibril_t *f;
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    fibril_t *f;
295
 
297
 
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    futex_up(&fibril_futex);
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    futex_up(&fibril_futex);
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}
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}
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/** Return fibril id of the currently running fibril.
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/** Return fibril id of the currently running fibril.
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 *
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 *
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 * @return      Fibril ID of the currently running pseudo thread.
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 * @return      Fibril ID of the currently running fibril.
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 */
320
 */
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fid_t fibril_get_id(void)
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fid_t fibril_get_id(void)
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{
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{
321
    return (fid_t) __tcb_get()->fibril_data;
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    return (fid_t) __tcb_get()->fibril_data;
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}
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}