mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-28 16:26:10 +03:00
57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
|
// 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 <memory>
|
||
|
|
|
||
|
|
#include "base/files/file_path.h"
|
||
|
|
#include "base/logging.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;
|
||
|
|
std::unique_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
|