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Elliott Hughes2faa5f12012-01-30 14:42:07 -08001/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
Brian Carlstromdb4d5402011-08-09 12:18:28 -070016
Brian Carlstromfc0e3212013-07-17 14:40:12 -070017#ifndef ART_RUNTIME_OS_H_
18#define ART_RUNTIME_OS_H_
Brian Carlstromdb4d5402011-08-09 12:18:28 -070019
Elliott Hughes76160052012-12-12 16:31:20 -080020namespace unix_file {
21class FdFile;
22} // namespace unix_file
23
Brian Carlstromdb4d5402011-08-09 12:18:28 -070024namespace art {
25
Elliott Hughes76160052012-12-12 16:31:20 -080026typedef ::unix_file::FdFile File;
27
Brian Carlstromdb4d5402011-08-09 12:18:28 -070028// Interface to the underlying OS platform.
29
Brian Carlstromdb4d5402011-08-09 12:18:28 -070030class OS {
31 public:
Brian Carlstrom7571e8b2013-08-12 17:04:14 -070032 // Open an existing file with read only access.
33 static File* OpenFileForReading(const char* name);
34
35 // Open an existing file with read/write access.
36 static File* OpenFileReadWrite(const char* name);
37
Andreas Gampeb73f1f52015-06-30 10:52:46 -070038 // Create an empty file with read/write access. This is a *new* file, that is, if the file
39 // already exists, it is *not* overwritten, but unlinked, and a new inode will be used.
Brian Carlstrom7571e8b2013-08-12 17:04:14 -070040 static File* CreateEmptyFile(const char* name);
41
Calin Juravlef83e7332015-11-04 16:16:47 +000042 // Create an empty file with write access. This is a *new* file, that is, if the file
43 // already exists, it is *not* overwritten, but unlinked, and a new inode will be used.
44 static File* CreateEmptyFileWriteOnly(const char* name);
45
Brian Carlstrom7571e8b2013-08-12 17:04:14 -070046 // Open a file with the specified open(2) flags.
47 static File* OpenFileWithFlags(const char* name, int flags);
Brian Carlstromdb4d5402011-08-09 12:18:28 -070048
Brian Carlstromdb4d5402011-08-09 12:18:28 -070049 // Check if a file exists.
50 static bool FileExists(const char* name);
Brian Carlstrom16192862011-09-12 17:50:06 -070051
52 // Check if a directory exists.
53 static bool DirectoryExists(const char* name);
Brian Carlstromdb4d5402011-08-09 12:18:28 -070054};
55
56} // namespace art
57
Brian Carlstromfc0e3212013-07-17 14:40:12 -070058#endif // ART_RUNTIME_OS_H_