1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef BASE_FILES_SCOPED_FILE_H_
6 #define BASE_FILES_SCOPED_FILE_H_
7 
8 #include <stdio.h>
9 
10 #include <memory>
11 
12 #include "base/base_export.h"
13 #include "base/logging.h"
14 #include "base/scoped_generic.h"
15 #include "build/build_config.h"
16 
17 namespace base {
18 
19 namespace internal {
20 
21 #if defined(OS_POSIX) || defined(OS_FUCHSIA)
22 struct BASE_EXPORT ScopedFDCloseTraits {
InvalidValueScopedFDCloseTraits23   static int InvalidValue() {
24     return -1;
25   }
26   static void Free(int fd);
27 };
28 #endif
29 
30 // Functor for |ScopedFILE| (below).
31 struct ScopedFILECloser {
operatorScopedFILECloser32   inline void operator()(FILE* x) const {
33     if (x)
34       fclose(x);
35   }
36 };
37 
38 }  // namespace internal
39 
40 // -----------------------------------------------------------------------------
41 
42 #if defined(OS_POSIX) || defined(OS_FUCHSIA)
43 // A low-level Posix file descriptor closer class. Use this when writing
44 // platform-specific code, especially that does non-file-like things with the
45 // FD (like sockets).
46 //
47 // If you're writing low-level Windows code, see base/win/scoped_handle.h
48 // which provides some additional functionality.
49 //
50 // If you're writing cross-platform code that deals with actual files, you
51 // should generally use base::File instead which can be constructed with a
52 // handle, and in addition to handling ownership, has convenient cross-platform
53 // file manipulation functions on it.
54 typedef ScopedGeneric<int, internal::ScopedFDCloseTraits> ScopedFD;
55 #endif
56 
57 // Automatically closes |FILE*|s.
58 typedef std::unique_ptr<FILE, internal::ScopedFILECloser> ScopedFILE;
59 
60 }  // namespace base
61 
62 #endif  // BASE_FILES_SCOPED_FILE_H_
63