Import chromium-64.0.3282.140

net/disk_cache/cache_util_win.cc

@@ -0,0 +1,46 @@
+// 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/cache_util.h"
+
+#include <windows.h>
+
+#include "base/files/file_path.h"
+#include "base/logging.h"
+#include "base/message_loop/message_loop.h"
+#include "base/win/scoped_handle.h"
+
+namespace disk_cache {
+
+bool MoveCache(const base::FilePath& from_path, const base::FilePath& to_path) {
+  // I don't want to use the shell version of move because if something goes
+  // wrong, that version will attempt to move file by file and fail at the end.
+  if (!MoveFileEx(from_path.value().c_str(), to_path.value().c_str(), 0)) {
+    LOG(ERROR) << "Unable to move the cache: " << GetLastError();
+    return false;
+  }
+  return true;
+}
+
+bool DeleteCacheFile(const base::FilePath& name) {
+  // We do a simple delete, without ever falling back to SHFileOperation, as the
+  // version from base does.
+  if (!DeleteFile(name.value().c_str())) {
+    // There is an error, but we share delete access so let's see if there is a
+    // file to open. Note that this code assumes that we have a handle to the
+    // file at all times (even now), so nobody can have a handle that prevents
+    // us from opening the file again (unless it was deleted).
+    DWORD sharing = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
+    DWORD access = SYNCHRONIZE;
+    base::win::ScopedHandle file(CreateFile(
+        name.value().c_str(), access, sharing, NULL, OPEN_EXISTING, 0, NULL));
+    if (file.IsValid())
+      return false;
+
+    // Most likely there is no file to open... and that's what we wanted.
+  }
+  return true;
+}
+
+}  // namespace disk_cache