Function lwp_pgrp_move

components/lwp/lwp_pgrp.c:237–279

}

int lwp_pgrp_move(rt_processgroup_t group, rt_lwp_t process)
{
    int retry = 1;
    rt_processgroup_t old_group;

    /* parameter check */
    if (group == RT_NULL || process == RT_NULL)
    {
        return -EINVAL;
    }

    if (lwp_pgid_get_bypgrp(group) == lwp_pgid_get_byprocess(process))
    {
        return 0;
    }

    PGRP_LOCK(group);
    while (retry)
    {
        retry = 0;
        old_group = lwp_pgrp_find_and_inc_ref(lwp_pgid_get_byprocess(process));

        PGRP_LOCK(old_group);
        LWP_LOCK(process);

        if (process->pgrp == old_group)
        {
            lwp_pgrp_remove(old_group, process);
            lwp_pgrp_insert(group, process);
        }
        else
        {
            retry = 1;
        }
        PGRP_UNLOCK(old_group);
        LWP_UNLOCK(process);

        lwp_pgrp_dec_ref(old_group);
    }
    PGRP_UNLOCK(group);

    return 0;
}

int lwp_pgrp_update_children_info(rt_processgroup_t group, pid_t sid, pid_t pgid)
{