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, 88 insertions, 0 deletions

diff --git a/signal/pt-kill-siginfo-np.c b/signal/pt-kill-siginfo-np.c
new file mode 100644
index 0000000..9bdf6cc
--- /dev/null
+++ b/signal/pt-kill-siginfo-np.c
@@ -0,0 +1,88 @@
+/* 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;
+}
+