1 files changed, 55 insertions, 0 deletions
diff --git a/chromium/net/disk_cache/blockfile/mapped_file_win.cc b/chromium/net/disk_cache/blockfile/mapped_file_win.cc
new file mode 100644
index 00000000000..d725238e32e
--- /dev/null
+++ b/chromium/net/disk_cache/blockfile/mapped_file_win.cc
@@ -0,0 +1,55 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/disk_cache/blockfile/mapped_file.h"
+
+#include "base/files/file_path.h"
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "net/disk_cache/disk_cache.h"
+
+namespace disk_cache {
+
+void* MappedFile::Init(const base::FilePath& name, size_t size) {
+  DCHECK(!init_);
+  if (init_ || !File::Init(name))
+    return NULL;
+
+  buffer_ = NULL;
+  init_ = true;
+  section_ = CreateFileMapping(platform_file(), NULL, PAGE_READWRITE, 0,
+                               static_cast<DWORD>(size), NULL);
+  if (!section_)
+    return NULL;
+
+  buffer_ = MapViewOfFile(section_, FILE_MAP_READ | FILE_MAP_WRITE, 0, 0, size);
+  DCHECK(buffer_);
+  view_size_ = size;
+
+  // Make sure we detect hardware failures reading the headers.
+  size_t temp_len = size ? size : 4096;
+  scoped_ptr<char[]> temp(new char[temp_len]);
+  if (!Read(temp.get(), temp_len, 0))
+    return NULL;
+
+  return buffer_;
+}
+
+MappedFile::~MappedFile() {
+  if (!init_)
+    return;
+
+  if (buffer_) {
+    BOOL ret = UnmapViewOfFile(buffer_);
+    DCHECK(ret);
+  }
+
+  if (section_)
+    CloseHandle(section_);
+}
+
+void MappedFile::Flush() {
+}
+
+}  // namespace disk_cache