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/*
* Copyright (C) 2009 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_LIBARTBASE_BASE_OS_H_
#define ART_LIBARTBASE_BASE_OS_H_
#include <stdint.h>
namespace unix_file {
class FdFile;
} // namespace unix_file
namespace art {
typedef ::unix_file::FdFile File;
// Interface to the underlying OS platform.
class OS {
public:
// Open an existing file with read only access.
static File* OpenFileForReading(const char* name);
// Open an existing file with read/write access.
static File* OpenFileReadWrite(const char* name);
// Create an empty file with read/write access. This is a *new* file, that is, if the file
// already exists, it is *not* overwritten, but unlinked, and a new inode will be used.
static File* CreateEmptyFile(const char* name);
// Create an empty file with write access. This is a *new* file, that is, if the file
// already exists, it is *not* overwritten, but unlinked, and a new inode will be used.
static File* CreateEmptyFileWriteOnly(const char* name);
// Open a file with the specified open(2) flags.
static File* OpenFileWithFlags(const char* name, int flags, bool auto_flush = true);
// Check if a file exists.
static bool FileExists(const char* name, bool check_file_type = true);
// Check if a directory exists.
static bool DirectoryExists(const char* name);
// Get the size of a file (or -1 if it does not exist).
static int64_t GetFileSizeBytes(const char* name);
};
} // namespace art
#endif // ART_LIBARTBASE_BASE_OS_H_
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