From 324f94c317d38fc44b6ff3d4f47146c8b5ad97b4 Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Tue, 16 Jun 2009 20:19:28 +0000
Subject: Add a portable wrapper for reader-writer locks.

llvm-svn: 73545
---
 llvm/lib/System/Unix/RWMutex.inc | 43 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 llvm/lib/System/Unix/RWMutex.inc

(limited to 'llvm/lib/System/Unix')

diff --git a/llvm/lib/System/Unix/RWMutex.inc b/llvm/lib/System/Unix/RWMutex.inc
new file mode 100644
index 00000000000..4487d7f83da
--- /dev/null
+++ b/llvm/lib/System/Unix/RWMutex.inc
@@ -0,0 +1,43 @@
+//= llvm/System/Unix/RWMutex.inc - Unix Reader/Writer Mutual Exclusion Lock  =//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Unix specific (non-pthread) RWMutex class.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//===          is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+namespace llvm {
+
+using namespace sys;
+
+RWMutex::RWMutex() { }
+
+RWMutex::~RWMutex() { }
+
+bool RWMutex::reader_acquire() {
+  return true;
+}
+
+bool RWMutex::reader_release() {
+  return true;
+}
+
+bool RWMutex::writer_acquire() {
+  return true;
+}
+
+bool RWMutex::writer_release() {
+  return true;
+}
+
+}
-- 
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