First version of the MappedFile abstraction for operating system idependent

mapping of files. This first version uses mmap where its available. The
class needs to implement an alternate mechanism based on malloc'd memory
and file reading/writing for platforms without virtual memory.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@16649 91177308-0d34-0410-b5e6-96231b3b80d8

lib/System/Win32/MappedFile.cpp

@@ -0,0 +1,38 @@
+//===- Win32/MappedFile.cpp - Win32 MappedFile 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 provides the Win32 specific implementation of the MappedFile
+// concept.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Win32.h"
+
+void MappedFile::initialize() {
+}
+
+void MappedFile::terminate() {
+}
+
+void MappedFile::unmap() {
+}
+
+void* MappedFile::map() {
+  static char junk[4096];
+  return junk;
+}
+
+size_t MappedFile::size() {
+  return 4096;
+}
+
+void MappedFile::size(size_t new_size) {
+}
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab