Function sys_thread_sigprocmask

components/lwp/lwp_syscall.c:6816–6881

* @brief Manipulates the signal mask for the current thread. * * This function allows a thread to modify its signal mask, which controls which signals are blocked (prevented from delivery). * The signal mask can be modified by adding, removing, or setting the signal set as a whole, depending on the `how` parameter. * The `sigset` specifies the signals to be manipulated, and the current signal

 * @see sys_sigaction(), sys_thread_sigpending()
 */
sysret_t sys_thread_sigprocmask(int how, const lwp_sigset_t *sigset, lwp_sigset_t *oset, size_t size)
{
    int ret = -1;
    lwp_sigset_t *pnewset = RT_NULL, *poldset = RT_NULL;
#ifdef ARCH_MM_MMU
    lwp_sigset_t newset, oldset;
#endif /* ARCH_MM_MMU */

    if (!size)
    {
        return -EINVAL;
    }
    if (!oset && !sigset)
    {
        return -EINVAL;
    }
    if (size != sizeof(lwp_sigset_t))
    {
        return -EINVAL;
    }
    if (oset)
    {
#ifdef ARCH_MM_MMU
        if (!lwp_user_accessable((void *)oset, size))
        {
            return -EFAULT;
        }
        poldset = &oldset;
#else
        if (!lwp_user_accessable((void *)oset, size))
        {
            return -EFAULT;
        }
        poldset = oset;
#endif
    }
    if (sigset)
    {
#ifdef ARCH_MM_MMU
        if (!lwp_user_accessable((void *)sigset, size))
        {
            return -EFAULT;
        }
        lwp_get_from_user(&newset, (void *)sigset, sizeof(lwp_sigset_t));
        pnewset = &newset;
#else
        if (!lwp_user_accessable((void *)sigset, size))
        {
            return -EFAULT;
        }
        pnewset = (lwp_sigset_t *)sigset;
#endif
    }
    ret = lwp_thread_signal_mask(rt_thread_self(), mask_command_u2k[how], pnewset, poldset);
    if (ret < 0)
    {
        return ret;
    }