hurd: Add hurd thread library

Contributed by

Agustina Arzille <avarzille@riseup.net>
Amos Jeffries <squid3@treenet.co.nz>
David Michael <fedora.dm0@gmail.com>
Marco Gerards <marco@gnu.org>
Marcus Brinkmann <marcus@gnu.org>
Neal H. Walfield <neal@gnu.org>
Pino Toscano <toscano.pino@tiscali.it>
Richard Braun <rbraun@sceen.net>
Roland McGrath <roland@gnu.org>
Samuel Thibault <samuel.thibault@ens-lyon.org>
Thomas DiModica <ricinwich@yahoo.com>
Thomas Schwinge <tschwinge@gnu.org>

	* htl: New directory.
	* sysdeps/htl: New directory.
	* sysdeps/hurd/htl: New directory.
	* sysdeps/i386/htl: New directory.
	* sysdeps/mach/htl: New directory.
	* sysdeps/mach/hurd/htl: New directory.
	* sysdeps/mach/hurd/i386/htl: New directory.
	* nscd/Depend, resolv/Depend, rt/Depend: Add htl dependency.
	* sysdeps/mach/hurd/i386/Implies: Add mach/hurd/i386/htl imply.
	* sysdeps/mach/hurd/i386/libpthread.abilist: New file.

1 files changed, 68 insertions, 0 deletions

diff --git a/sysdeps/htl/pt-barrier-wait.c b/sysdeps/htl/pt-barrier-wait.c
new file mode 100644
index 0000000000..faac1f9d5a
--- /dev/null
+++ b/sysdeps/htl/pt-barrier-wait.c
@@ -0,0 +1,68 @@
+/* pthread_barrier_wait.  Generic version.
+   Copyright (C) 2002-2018 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#include <pthread.h>
+#include <assert.h>
+
+#include <pt-internal.h>
+
+int
+pthread_barrier_wait (pthread_barrier_t *barrier)
+{
+  __pthread_spin_lock (&barrier->__lock);
+  if (--barrier->__pending == 0)
+    {
+      barrier->__pending = barrier->__count;
+
+      if (barrier->__count > 1)
+	{
+	  struct __pthread *wakeup;
+	  unsigned n = 0;
+
+	  __pthread_queue_iterate (barrier->__queue, wakeup)
+	    n++;
+
+	  {
+	    struct __pthread *wakeups[n];
+	    unsigned i = 0;
+
+	    __pthread_dequeuing_iterate (barrier->__queue, wakeup)
+	      wakeups[i++] = wakeup;
+
+	    barrier->__queue = NULL;
+	    __pthread_spin_unlock (&barrier->__lock);
+
+	    for (i = 0; i < n; i++)
+	      __pthread_wakeup (wakeups[i]);
+	  }
+	}
+
+      return PTHREAD_BARRIER_SERIAL_THREAD;
+    }
+  else
+    {
+      struct __pthread *self = _pthread_self ();
+
+      /* Add ourselves to the list of waiters.  */
+      __pthread_enqueue (&barrier->__queue, self);
+      __pthread_spin_unlock (&barrier->__lock);
+
+      __pthread_block (self);
+      return 0;
+    }
+}