Merge pt-machine.h for the blackfin from the Analog

source tree.

libpthread/linuxthreads/sysdeps/bfin/pt-machine.h

@@ -0,0 +1,57 @@
+/* Machine-dependent pthreads configuration and inline functions.
+   Copyright (C) 1996, 1998, 2000, 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson <rth@tamu.edu>.
+
+   The GNU C Library 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 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If
+   not, write to the Free Software Foundation, Inc.,
+   59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H   1
+
+#ifndef PT_EI
+# define PT_EI extern inline
+#endif
+
+extern long int testandset (int *spinlock);
+extern int __compare_and_swap (long *, long , long);
+
+/* Spinlock implementation; required.  */
+PT_EI long int
+testandset (int *spinlock)
+{
+	if (*spinlock)
+		return 1;
+	else
+	{
+		*spinlock=1;
+		return 0;
+	}
+}
+
+#define HAS_COMPARE_AND_SWAP
+
+PT_EI int
+__compare_and_swap (long int *p, long int oldval, long int newval)
+{
+  if((*p ^ oldval) == 0) {
+	*p = newval;
+	return 1;
+  }
+  else
+	return 0;
+}
+
+#endif /* pt-machine.h */