1 files changed, 23 insertions, 0 deletions
diff --git a/base/file_util.cc b/base/file_util.cc
index 10e08d5..1cf22b7 100644
--- a/base/file_util.cc
+++ b/base/file_util.cc
@@ -275,6 +275,29 @@ bool CloseFile(FILE* file) {
   return fclose(file) == 0;
 }
 
+///////////////////////////////////////////////
+// MemoryMappedFile
+
+MemoryMappedFile::~MemoryMappedFile() {
+  CloseHandles();
+}
+
+bool MemoryMappedFile::Initialize(const FilePath& file_name) {
+  if (IsValid())
+    return false;
+
+  if (!MapFileToMemory(file_name)) {
+    CloseHandles();
+    return false;
+  }
+
+  return true;
+}
+
+bool MemoryMappedFile::IsValid() {
+  return data_ != NULL;
+}
+
 // Deprecated functions ----------------------------------------------------
 
 bool AbsolutePath(std::wstring* path_str) {