mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 14:26:09 +03:00
45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
// Copyright 2014 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/simple/simple_util.h"
|
|
|
|
#include <windows.h>
|
|
|
|
#include "base/files/file_util.h"
|
|
#include "base/format_macros.h"
|
|
#include "base/rand_util.h"
|
|
#include "base/strings/stringprintf.h"
|
|
#include "net/disk_cache/cache_util.h"
|
|
|
|
namespace disk_cache {
|
|
namespace simple_util {
|
|
|
|
bool SimpleCacheDeleteFile(const base::FilePath& path) {
|
|
// Even if a file was opened with FLAG_SHARE_DELETE, it is not possible to
|
|
// create a new file with the same name until the original file is actually
|
|
// deleted. To allow new files to be created with the new name right away,
|
|
// the file is renamed before it is deleted.
|
|
|
|
// Why a random name? Because if the name was derived from our original name,
|
|
// then churn on a particular cache entry could cause flakey behaviour.
|
|
|
|
// TODO(morlovich): Ensure these "todelete_" files are cleaned up on periodic
|
|
// directory sweeps.
|
|
const base::FilePath rename_target =
|
|
path.DirName().AppendASCII(base::StringPrintf("todelete_%016" PRIx64,
|
|
base::RandUint64()));
|
|
|
|
bool rename_succeeded = !!MoveFile(path.value().c_str(),
|
|
rename_target.value().c_str());
|
|
if (rename_succeeded)
|
|
return DeleteCacheFile(rename_target);
|
|
|
|
// The rename did not succeed. The fallback behaviour is to delete the file in
|
|
// place, which might cause some flake.
|
|
return DeleteCacheFile(path);
|
|
}
|
|
|
|
} // namespace simple_util
|
|
} // namespace disk_cache
|