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/* Set a thread's signal state. Hurd on Mach version.
Copyright (C) 2002-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <pthread.h>
#include <assert.h>
#include <signal.h>
#include <hurd/signal.h>
#include <hurd/msg.h>
#include <pt-internal.h>
error_t
__pthread_sigstate (struct __pthread *thread, int how,
const sigset_t *set, sigset_t *oset, int clear_pending)
{
error_t err = 0;
struct hurd_sigstate *ss;
sigset_t old, new;
sigset_t pending;
if (set != NULL)
new = *set;
ss = _hurd_thread_sigstate (thread->kernel_thread);
assert (ss);
_hurd_sigstate_lock (ss);
old = ss->blocked;
if (set != NULL)
{
switch (how)
{
case SIG_BLOCK:
ss->blocked |= new;
break;
case SIG_SETMASK:
ss->blocked = new;
break;
case SIG_UNBLOCK:
ss->blocked &= ~new;
break;
default:
err = EINVAL;
break;
}
ss->blocked &= ~_SIG_CANT_MASK;
}
if (!err && clear_pending)
__sigemptyset (&ss->pending);
pending = _hurd_sigstate_pending (ss) & ~ss->blocked;
_hurd_sigstate_unlock (ss);
if (!err && oset != NULL)
*oset = old;
if (!err && pending)
/* Send a message to the signal thread so it
will wake up and check for pending signals. */
__msg_sig_post (_hurd_msgport, 0, 0, __mach_task_self ());
return err;
}
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