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1 /*
2  * Copyright (C) 2018 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  */
16 
17 #ifndef INCLUDE_PERFETTO_BASE_TEMP_FILE_H_
18 #define INCLUDE_PERFETTO_BASE_TEMP_FILE_H_
19 
20 #include <string>
21 
22 #include "perfetto/base/scoped_file.h"
23 
24 namespace perfetto {
25 namespace base {
26 
27 class TempFile {
28  public:
29   static TempFile CreateUnlinked();
30   static TempFile Create();
31 
32   TempFile(TempFile&&) noexcept;
33   TempFile& operator=(TempFile&&);
34   ~TempFile();
35 
path()36   const std::string& path() const { return path_; }
fd()37   int fd() const { return *fd_; }
38   int operator*() const { return *fd_; }
39 
40   // Unlinks the file from the filesystem but keeps the fd() open.
41   // It is safe to call this multiple times.
42   void Unlink();
43 
44   // Releases the underlying file descriptor. Will unlink the file from the
45   // filesystem if it was created via CreateUnlinked().
46   ScopedFile ReleaseFD();
47 
48  private:
49   TempFile();
50   TempFile(const TempFile&) = delete;
51   TempFile& operator=(const TempFile&) = delete;
52 
53   ScopedFile fd_;
54   std::string path_;
55 };
56 
57 class TempDir {
58  public:
59   static TempDir Create();
60 
61   TempDir(TempDir&&) noexcept;
62   TempDir& operator=(TempDir&&);
63   ~TempDir();
64 
path()65   const std::string& path() const { return path_; }
66 
67  private:
68   TempDir();
69   TempDir(const TempDir&) = delete;
70   TempDir& operator=(const TempDir&) = delete;
71 
72   std::string path_;
73 };
74 
75 }  // namespace base
76 }  // namespace perfetto
77 
78 #endif  // INCLUDE_PERFETTO_BASE_TEMP_FILE_H_
79