/*
    Copyright (C) 2019 Daniel Schultz

    This file is part of FLINT.

    FLINT is free software: you can redistribute it and/or modify it under
    the terms of the GNU Lesser General Public License (LGPL) as published
    by the Free Software Foundation; either version 2.1 of the License, or
    (at your option) any later version.  See <https://www.gnu.org/licenses/>.
*/

#include "thread_pool.h"

int thread_pool_restore_affinity(thread_pool_t T)
{
#if FLINT_USES_CPUSET && FLINT_USES_PTHREAD
    slong i;
    int errorno;
    thread_pool_entry_struct * D;

    /* restore affinities for workers */
    D = T->tdata;
    for (i = 0; i < T->length; i++)
    {
        errorno = pthread_setaffinity_np(D[i].pth, sizeof(cpu_set_t),
                                                        &T->original_affinity);
        if (errorno != 0)
            return errorno;
    }

    /* restore affinity for main thread */
    errorno = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t),
                                                        &T->original_affinity);
    if (errorno != 0)
        return errorno;
#endif

    return 0;
}