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/* pthread-kill-siginfo-np.c - Generic pthread_kill_siginfo_np implementation.
Copyright (C) 2008 Free Software Foundation, Inc.
Written by Neal H. Walfield <neal@gnu.org>.
This file is part of the GNU Hurd.
The GNU Hurd 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 3 of
the License, or (at your option) any later version.
The GNU Hurd 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 this program. If not, see
<http://www.gnu.org/licenses/>. */
#include "pt-internal.h"
#include "sig-internal.h"
int
pthread_kill_siginfo_np (pthread_t tid, siginfo_t si)
{
int sig = si.si_signo;
if (sig < 0 || sig >= NSIG)
return EINVAL;
if (sig == 0)
return 0;
struct signal_state *ss = &__pthread_getid (tid)->ss;
pthread_mutex_lock (&sig_lock);
pthread_mutex_lock (&ss->lock);
if (ss->sigwaiter && (ss->sigwaiter->signals & sigmask (si.si_signo)))
/* The thread is in a call to sigwait. */
{
ss->sigwaiter->info = si;
sigwaiter_unblock (ss->sigwaiter);
return 0;
}
pthread_mutex_unlock (&sig_lock);
if (ss->actions[sig - 1].sa_handler == (void *) SIG_IGN
|| (ss->actions[sig - 1].sa_handler == (void *) SIG_DFL
&& default_action (sig) == sig_ignore))
/* It is unclear (to me) what is supposed to happen when a signal
is generated for a thread, which is blocking that signal and
ignoring it. POSIX does say that when the action associated
with a pending, blocked signal is set to SIG_IGN, the pending
signal is to be cleared. Thus, it makes sense that any signal
set to ignore is discarded at generation. */
{
pthread_mutex_unlock (&ss->lock);
return 0;
}
if ((sigmask (sig) & ss->blocked))
/* The signal is blocked. Mark it pending. */
{
ss->pending |= sigmask (sig);
pthread_mutex_unlock (&ss->lock);
return 0;
}
if (pthread_self () == tid
&& (! (ss->actions[si.si_signo - 1].sa_flags & SA_ONSTACK)
|| (ss->stack.ss_flags & SS_DISABLE)
|| (ss->stack.ss_flags & SS_ONSTACK)))
/* We are sending a signal to ourself and we don't use an
alternate stack. */
signal_dispatch (ss, &si);
else
signal_dispatch_lowlevel (ss, tid, si);
/* Don't unlock ss: signal_dispatch and signal_dispatch_lowlevel
assume ownership of the lock. */
return 0;
}
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