2008-03-01 Neal H. Walfield <neal@gnu.org>

	Add signal implementation.
	* Makefile.am (SYSDEP_PATH): Add $(srcdir)/signal.
	(libpthread_a_SOURCES): Add pt-mutex-transfer-np.c, kill.c,
	killpg.c, pt-kill-siginfo-np.c, raise.c, sigaction.c, sigaddset.c,
	sigaltstack.c, sigdelset.c, sigemptyset.c, sigfillset.c,
	sig-internal.c, sig-internal.h, siginterrupt.c, sigismember.c,
	signal.c, signal-dispatch.c, signal.h, sigpending.c,
	sigprocmask.c, sigsuspend.c, sigtimedwait.c, sigwait.c,
	sigwaiter.c, sigwaitinfo.c, signal-dispatch-lowlevel.c, and
	sigprocmask.c.
	* headers.m4: Link libpthread/signal/signal.h into ../include.
	* sysdeps/generic/pt-mutex-transfer-np.c: New file.
        * signal/README: New file.
        * signal/TODO: Likewise.
        * signal/kill.c: Likewise.
        * signal/pt-kill-siginfo-np.c: Likewise.
        * signal/sig-internal.c: Likewise.
        * signal/sig-internal.h: Likewise.
        * signal/sigaction.c: Likewise.
        * signal/sigaltstack.c: Likewise.
        * signal/signal-dispatch.c: Likewise.
        * signal/signal.h: Likewise.
        * signal/sigpending.c: Likewise.
        * signal/sigsuspend.c: Likewise.
        * signal/sigtimedwait.c: Likewise.
        * signal/sigwaiter.c: Likewise.
        * signal/sigwaitinfo.c: Likewise.
	* sysdeps/l4/hurd/sig-sysdep.h: Likewise.
	* sysdeps/l4/hurd/sigprocmask.c: Likewise.
	* sysdeps/generic/killpg.c: Likewise.
	* sysdeps/generic/pt-kill.c: Likewise.
	* sysdeps/generic/raise.c: Likewise.
	* sysdeps/generic/sigaddset.c: Likewise.
	* sysdeps/generic/sigdelset.c: Likewise.
	* sysdeps/generic/sigemptyset.c: Likewise.
	* sysdeps/generic/sigfillset.c: Likewise.
	* sysdeps/generic/siginterrupt.c: Likewise.
	* sysdeps/generic/sigismember.c: Likewise.
	* sysdeps/generic/signal.c: Likewise.
	* sysdeps/generic/sigwait.c: Likewise.
	* sysdeps/l4/hurd/ia32/signal-dispatch-lowlevel.c: Likewise.
	* sysdeps/l4/hurd/pt-sysdep.c (sigprocmask): Remove function.
	* sysdeps/l4/hurd/pt-sigstate.c (__pthread_sigstate): Implement
	it.
	* sysdeps/l4/hurd/pt-sigstate-init.c: Include <sig-internal.h>.
	(__pthread_sigstate_init): Initialize THREAD->SS.
	* sysdeps/l4/hurd/pt-kill.c: Remove file.
	* pthread/pt-internal.h: Include <sig-internal.h>.
	(PTHREAD_SIGNAL_MEMBERS) [! PTHREAD_SIGNAL_MEMBERS]: Define.
	(struct __pthread): Add PTHREAD_SIGNAL_MEMBERS.
	* pthread/pt-self.c (pthread_self): Assert that SELF is not NULL.

1 files changed, 91 insertions, 0 deletions

diff --git a/signal/sigwaiter.c b/signal/sigwaiter.c
new file mode 100644
index 0000000..8d041ac
--- /dev/null
+++ b/signal/sigwaiter.c
@@ -0,0 +1,91 @@
+/* sigwaiter.c - Signal handling functions.
+   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 "sig-internal.h"
+
+#include <hurd/futex.h>
+
+struct sigwaiter *sigwaiters;
+
+siginfo_t
+sigwaiter_block (struct signal_state *ss, const sigset_t *restrict set)
+{
+  assert (pthread_mutex_trylock (&sig_lock) == EBUSY);
+  assert (pthread_mutex_trylock (&ss->lock) == EBUSY);
+
+  assert (! ss->sigwaiter);
+
+  struct sigwaiter waiter;
+
+  waiter.next = sigwaiters;
+  if (waiter.next)
+    {
+      assert (! waiter.next->prev);
+      waiter.next->prev = &waiter;
+    }
+  waiter.prev = 0;
+  sigwaiters = &waiter;
+
+  waiter.ss = ss;
+  waiter.info.si_signo = 0;
+  waiter.signals = *set;
+
+  ss->sigwaiter = &waiter;
+
+  pthread_mutex_unlock (&ss->lock);
+  pthread_mutex_unlock (&sig_lock);
+
+  futex_wait (&waiter.info.si_signo, 0);
+
+#ifndef NDEBUG
+  pthread_mutex_lock (&ss->lock);
+  ss->sigwaiter = 0;
+  pthread_mutex_unlock (&ss->lock);
+#endif
+
+  assert (waiter.info.si_signo);
+  return waiter.info;
+}
+
+void
+sigwaiter_unblock (struct sigwaiter *waiter)
+{
+  assert (pthread_mutex_trylock (&sig_lock) == EBUSY);
+  assert (pthread_mutex_trylock (&waiter->ss->lock) == EBUSY);
+
+  struct sigwaiter *prev = waiter->prev;
+  struct sigwaiter *next = waiter->next;
+
+  if (next)
+    next->prev = prev;
+
+  if (prev)
+    prev->next = next;
+  else
+    sigwaiters = next;
+
+  sigdelset (&process_pending, waiter->info.si_signo);
+  sigdelset (&waiter->ss->pending, waiter->info.si_signo);
+
+  pthread_mutex_unlock (&waiter->ss->lock);
+  pthread_mutex_unlock (&sig_lock);
+
+  futex_wake (&waiter->info.si_signo, 1);
+}