From: Ulrich Drepper <drepper@redhat.com>
Date: Wed, 24 Mar 2004 06:34:59 +0000 (+0000)
Subject: Define lll_mutex_cond_trylock.
X-Git-Tag: glibc-2.16-ports-before-merge~1199
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ce3f7d21bd70fc5475a6c2bfcb85b253e588309b;p=thirdparty%2Fglibc.git

Define lll_mutex_cond_trylock.
---

diff --git a/sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h b/sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h
index 9d125e0d6d7..a7079a84902 100644
--- a/sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h
+++ b/sysdeps/unix/sysv/linux/alpha/nptl/lowlevellock.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2003, 2004 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
@@ -80,6 +80,14 @@ __lll_mutex_trylock(int *futex)
 #define lll_mutex_trylock(lock)	__lll_mutex_trylock (&(lock))
 
 
+static inline int __attribute__((always_inline))
+__lll_mutex_cond_trylock(int *futex)
+{
+  return atomic_compare_and_exchange_val_acq (futex, 2, 0) != 0;
+}
+#define lll_mutex_cond_trylock(lock)	__lll_mutex_cond_trylock (&(lock))
+
+
 extern void __lll_lock_wait (int *futex) attribute_hidden;
 
 static inline void __attribute__((always_inline))