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.

llvm-svn: 16649

1 files changed, 29 insertions, 0 deletions

diff --git a/llvm/lib/System/MappedFile.cpp b/llvm/lib/System/MappedFile.cpp
new file mode 100644
index 00000000000..55e17012f39
--- /dev/null
+++ b/llvm/lib/System/MappedFile.cpp
@@ -0,0 +1,29 @@
+//===- MappedFile.cpp - MappedFile Support ----------------------*- 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 mapped file concept.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/System/MappedFile.h"
+
+namespace llvm {
+using namespace sys;
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only TRULY operating system
+//===          independent code. 
+//===----------------------------------------------------------------------===//
+
+}
+
+// Include the platform-specific parts of this class.
+#include "platform/MappedFile.cpp"
+
+// vim: sw=2 smartindent smarttab tw=80 autoindent expandtab