int
_sigsuspend(const sigset_t * set)
{
struct pthread *curthread = _get_curthread();
int ret = -1;
sigset_t oset, sigset;
/* Check if a new signal set was provided by the caller: */
if (set != NULL) {
/* Save the current signal mask: */
oset = curthread->sigmask;
/* Change the caller's mask: */
curthread->sigmask = *set;
/*
* Check if there are pending signals for the running
* thread or process that aren't blocked:
*/
sigset = curthread->sigpend;
SIGSETOR(sigset, _process_sigpending);
SIGSETNAND(sigset, curthread->sigmask);
if (SIGNOTEMPTY(sigset)) {
/*
* Call the kernel scheduler which will safely
* install a signal frame for the running thread:
*/
_thread_kern_sched_sig();
} else {
/* Wait for a signal: */
_thread_kern_sched_state(PS_SIGSUSPEND,
__FILE__, __LINE__);
}
/* Always return an interrupted error: */
errno = EINTR;
/* Restore the signal mask: */
curthread->sigmask = oset;
} else {
/* Return an invalid argument error: */
errno = EINVAL;
}
/* Return the completion status: */
return (ret);
}
int
_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
{
struct pthread *curthread = _get_curthread();
sigset_t sigset;
int ret = 0;
/* Check if the existing signal process mask is to be returned: */
if (oset != NULL) {
/* Return the current mask: */
*oset = curthread->sigmask;
}
/* Check if a new signal set was provided by the caller: */
if (set != NULL) {
/* Process according to what to do: */
switch (how) {
/* Block signals: */
case SIG_BLOCK:
/* Add signals to the existing mask: */
SIGSETOR(curthread->sigmask, *set);
break;
/* Unblock signals: */
case SIG_UNBLOCK:
/* Clear signals from the existing mask: */
SIGSETNAND(curthread->sigmask, *set);
break;
/* Set the signal process mask: */
case SIG_SETMASK:
/* Set the new mask: */
curthread->sigmask = *set;
break;
/* Trap invalid actions: */
default:
/* Return an invalid argument: */
errno = EINVAL;
ret = -1;
break;
}
/* Increment the sequence number: */
curthread->sigmask_seqno++;
/*
* Check if there are pending signals for the running
* thread or process that aren't blocked:
*/
sigset = curthread->sigpend;
SIGSETOR(sigset, _process_sigpending);
SIGSETNAND(sigset, curthread->sigmask);
if (SIGNOTEMPTY(sigset))
/*
* Call the kernel scheduler which will safely
* install a signal frame for the running thread:
*/
_thread_kern_sched_sig();
}
/* Return the completion status: */
return (ret);
}
