For PR540:

Add a Mutex class for thread synchronization in a platform-independent way.
The current implementation only supports pthreads. Win32 use of Critical
Sections will be added later. The design permits other threading models to
be used if (and only if) pthreads is not available.

llvm-svn: 22403

1 files changed, 46 insertions, 0 deletions

diff --git a/llvm/lib/System/Unix/Mutex.inc b/llvm/lib/System/Unix/Mutex.inc
new file mode 100644
index 00000000000..fa218dbb53c
--- /dev/null
+++ b/llvm/lib/System/Unix/Mutex.inc
@@ -0,0 +1,46 @@
+//===- llvm/System/Unix/Mutex.inc - Unix Mutex Implementation ---*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Reid Spencer and is distributed under the 
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Unix specific (non-pthread) Mutex class.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//===          is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+namespace llvm
+{
+using namespace sys;
+
+Mutex::Mutex( bool recursive)
+{
+}
+
+Mutex::~Mutex()
+{
+}
+
+bool 
+Mutex::acquire()
+{
+}
+
+bool 
+Mutex::release()
+{
+}
+
+bool 
+Mutex::tryacquire( void )
+{
+}
+
+}