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, 70 insertions, 0 deletions

diff --git a/signal/kill.c b/signal/kill.c
new file mode 100644
index 0000000..27c9c32
--- /dev/null
+++ b/signal/kill.c
@@ -0,0 +1,70 @@
+/* kill.c - Generic kill 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 "sig-internal.h"
+
+int
+kill (pid_t pid, int signo)
+{
+  if (pid != getpid ())
+    {
+      errno = EOPNOTSUPP;
+      return -1;
+    }
+
+  /* "Signals generated for the process shall be delivered to exactly
+     one of those threads within the process which is in a call to a
+     sigwait() function selecting that signal or has not blocked
+     delivery of the signal.  If there are no threads in a call to a
+     sigwait() function selecting that signal, and if all threads
+     within the process block delivery of the signal, the signal shall
+     remaing pending on the process" (2.4.1).  */
+
+  /* First, see if there is a waiter, which is interested in this
+     signal.  */
+  pthread_mutex_lock (&sig_lock);
+
+  struct sigwaiter *waiter;
+  for (waiter = sigwaiters; waiter; waiter = waiter->next)
+    if ((waiter->signals & sigmask (signo)))
+      /* Got a winner.  */
+      {
+	sigdelset (&process_pending, signo);
+
+	pthread_mutex_lock (&waiter->ss->lock);
+	sigdelset (&waiter->ss->pending, signo);
+
+	memset (&waiter->info, 0, sizeof (waiter->info));
+	waiter->info.si_signo = signo;
+
+	sigwaiter_unblock (waiter);
+
+	return 0;
+      }
+
+  pthread_mutex_unlock (&sig_lock);
+
+  /* XXX: We just generate the signal for the current thread.  If the
+     current thread has blocked the signal, the correct thing to do is
+     to iterate over all the other threads and find on that hasn't
+     blocked it.  */
+  return pthread_kill (pthread_self (), signo);
+}
+