1// Copyright 2012 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_MAC_SCOPED_CFFILEDESCRIPTORREF_H_
6#define BASE_MAC_SCOPED_CFFILEDESCRIPTORREF_H_
7
8#include <CoreFoundation/CoreFoundation.h>
9
10#include "base/scoped_generic.h"
11
12namespace base {
13namespace mac {
14
15namespace internal {
16
17struct ScopedCFFileDescriptorRefTraits {
18  static CFFileDescriptorRef InvalidValue() { return nullptr; }
19  static void Free(CFFileDescriptorRef ref) {
20    CFFileDescriptorInvalidate(ref);
21    CFRelease(ref);
22  }
23};
24
25}  // namespace internal
26
27// ScopedCFFileDescriptorRef is designed after ScopedCFTypeRef<>. On
28// destruction, it will invalidate the file descriptor.
29// ScopedCFFileDescriptorRef (unlike ScopedCFTypeRef<>) does not support RETAIN
30// semantics, copying, or assignment, as doing so would increase the chances
31// that a file descriptor is invalidated while still in use.
32using ScopedCFFileDescriptorRef =
33    ScopedGeneric<CFFileDescriptorRef,
34                  internal::ScopedCFFileDescriptorRefTraits>;
35
36}  // namespace mac
37}  // namespace base
38
39#endif  // BASE_MAC_SCOPED_CFFILEDESCRIPTORREF_H_
40