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, 85 insertions, 0 deletions

diff --git a/sysdeps/mach/hurd/htl/pt-mutex-trylock.c b/sysdeps/mach/hurd/htl/pt-mutex-trylock.c
new file mode 100644
index 0000000000..36d4f5921c
--- /dev/null
+++ b/sysdeps/mach/hurd/htl/pt-mutex-trylock.c
@@ -0,0 +1,85 @@
+/* pthread_mutex_trylock.  Hurd version.
+   Copyright (C) 2016-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   This program 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.
+
+   This program 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 this program; if not, see
+   <http://www.gnu.org/licenses/>.
+*/
+
+#include <pthread.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <pt-internal.h>
+#include "pt-mutex.h"
+#include <hurdlock.h>
+
+int
+__pthread_mutex_trylock (pthread_mutex_t *mtxp)
+{
+  struct __pthread *self;
+  int ret;
+
+  switch (MTX_TYPE (mtxp))
+    {
+    case PT_MTX_NORMAL:
+      ret = lll_trylock (&mtxp->__lock);
+      if (ret)
+	ret = EBUSY;
+      break;
+
+    case PT_MTX_RECURSIVE:
+      self = _pthread_self ();
+      if (mtx_owned_p (mtxp, self, mtxp->__flags))
+	{
+	  if (__glibc_unlikely (mtxp->__cnt + 1 == 0))
+	    return EAGAIN;
+
+	  ++mtxp->__cnt;
+	  ret = 0;
+	}
+      else if ((ret = lll_trylock (&mtxp->__lock)) == 0)
+	{
+	  mtx_set_owner (mtxp, self, mtxp->__flags);
+	  mtxp->__cnt = 1;
+	}
+      else
+	ret = EBUSY;
+
+      break;
+
+    case PT_MTX_ERRORCHECK:
+      self = _pthread_self ();
+      if ((ret = lll_trylock (&mtxp->__lock)) == 0)
+	mtx_set_owner (mtxp, self, mtxp->__flags);
+      else
+	ret = EBUSY;
+      break;
+
+    case PT_MTX_NORMAL | PTHREAD_MUTEX_ROBUST:
+    case PT_MTX_RECURSIVE | PTHREAD_MUTEX_ROBUST:
+    case PT_MTX_ERRORCHECK | PTHREAD_MUTEX_ROBUST:
+      self = _pthread_self ();
+      ROBUST_LOCK (self, mtxp, __lll_robust_trylock);
+      break;
+
+    default:
+      ret = EINVAL;
+      break;
+    }
+
+  return ret;
+}
+
+strong_alias (__pthread_mutex_trylock, _pthread_mutex_trylock)
+strong_alias (__pthread_mutex_trylock, pthread_mutex_trylock)