libpthread/nptl: core of the "Native Posix Threading Library" for uClibc

targetting arm,sh,i386,mips,sparc for now

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

1 files changed, 46 insertions, 0 deletions

diff --git a/libpthread/nptl/sysdeps/alpha/pthread_spin_trylock.S b/libpthread/nptl/sysdeps/alpha/pthread_spin_trylock.S
new file mode 100644
index 000000000..0948da698
--- /dev/null
+++ b/libpthread/nptl/sysdeps/alpha/pthread_spin_trylock.S
@@ -0,0 +1,46 @@
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Richard Henderson  <rth@twiddle.net>, 2003.
+
+   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; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+
+#define _ERRNO_H 1
+#include <bits/errno.h>
+
+	.text
+	.align	4
+
+	.globl	pthread_spin_trylock
+	.ent	pthread_spin_trylock
+pthread_spin_trylock:
+	.frame	$sp, 0, $26, 0
+	.prologue 0
+
+0:	ldl_l	$1, 0($16)
+	lda	$2, 1
+	lda	$0, EBUSY
+	bne	$1, 1f
+
+	stl_c	$2, 0($16)
+	beq	$2, 2f
+	mb
+	lda	$0, 0
+
+1:	ret
+2:	br	0b
+
+	.end	pthread_spin_trylock