From 51c55d85632d43aa362b625ae519d00d559f9e5c Mon Sep 17 00:00:00 2001
From: "Neal H. Walfield" <neal@gnu.org>
Date: Thu, 10 Oct 2002 23:05:06 +0000
Subject: Import libpthread.

---
 sysdeps/mach/bits/spin-lock.h | 97 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 sysdeps/mach/bits/spin-lock.h

(limited to 'sysdeps/mach/bits')

diff --git a/sysdeps/mach/bits/spin-lock.h b/sysdeps/mach/bits/spin-lock.h
new file mode 100644
index 0000000..f295df7
--- /dev/null
+++ b/sysdeps/mach/bits/spin-lock.h
@@ -0,0 +1,97 @@
+/* Definitions of user-visible names for spin locks.
+   Copyright (C) 1994, 1997, 2002 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 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.  */
+
+#ifndef _BITS_SPIN_LOCK_H
+#define _BITS_SPIN_LOCK_H	1
+
+#include <features.h>
+#include <machine-lock.h>	/* This does all the work.  */
+
+__BEGIN_DECLS
+
+/* The type of a spin lock object.  */
+typedef __spin_lock_t __pthread_spinlock_t;
+
+/* Initializer for a spin lock object.  */
+#ifndef __SPIN_LOCK_INITIALIZER
+#error __SPIN_LOCK_INITIALIZER undefined: should be defined by <lock-intern.h>.
+#endif
+
+#if defined __USE_EXTERN_INLINES || defined _FORCE_INLINES
+
+# ifndef __EBUSY
+#  include <errno.h>
+#  define __EBUSY EBUSY
+# endif
+
+# ifndef __PT_SPIN_INLINE
+#  define __PT_SPIN_INLINE extern __inline
+# endif
+
+__PT_SPIN_INLINE int __pthread_spin_destroy (__pthread_spinlock_t *__lock);
+
+__PT_SPIN_INLINE int
+__pthread_spin_destroy (__pthread_spinlock_t *__lock)
+{
+  return 0;
+}
+
+__PT_SPIN_INLINE int __pthread_spin_init (__pthread_spinlock_t *__lock,
+					  int __pshared);
+
+__PT_SPIN_INLINE int
+__pthread_spin_init (__pthread_spinlock_t *__lock, int __pshared)
+{
+  *__lock = __SPIN_LOCK_INITIALIZER;
+  return 0;
+}
+
+__PT_SPIN_INLINE int __pthread_spin_trylock (__pthread_spinlock_t *__lock);
+
+__PT_SPIN_INLINE int
+__pthread_spin_trylock (__pthread_spinlock_t *__lock)
+{
+  return __spin_try_lock (__lock) ? 0 : __EBUSY;
+}
+
+extern inline int __pthread_spin_lock (__pthread_spinlock_t *__lock);
+extern int _pthread_spin_lock (__pthread_spinlock_t *__lock);
+
+extern inline int
+__pthread_spin_lock (__pthread_spinlock_t *__lock)
+{
+  if (__pthread_spin_trylock (__lock))
+    return _pthread_spin_lock (__lock);
+  return 0;
+}
+
+__PT_SPIN_INLINE int __pthread_spin_unlock (__pthread_spinlock_t *__lock);
+
+__PT_SPIN_INLINE int
+__pthread_spin_unlock (__pthread_spinlock_t *__lock)
+{
+  __spin_unlock (__lock);
+  return 0;
+}
+
+#endif /* Use extern inlines or force inlines.  */
+
+__END_DECLS
+
+#endif /* bits/spin-lock.h */
-- 
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