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/logging.h" 13 #include "base/scoped_generic.h" 14 #include "util/build_config.h" 15 16 namespace base { 17 18 namespace internal { 19 20 #if defined(OS_POSIX) || defined(OS_FUCHSIA) 21 struct ScopedFDCloseTraits { InvalidValueScopedFDCloseTraits22 static int InvalidValue() { return -1; } 23 static void Free(int fd); 24 }; 25 #endif 26 27 // Functor for |ScopedFILE| (below). 28 struct ScopedFILECloser { operatorScopedFILECloser29 inline void operator()(FILE* x) const { 30 if (x) 31 fclose(x); 32 } 33 }; 34 35 } // namespace internal 36 37 // ----------------------------------------------------------------------------- 38 39 #if defined(OS_POSIX) || defined(OS_FUCHSIA) 40 // A low-level Posix file descriptor closer class. Use this when writing 41 // platform-specific code, especially that does non-file-like things with the 42 // FD (like sockets). 43 // 44 // If you're writing low-level Windows code, see base/win/scoped_handle.h 45 // which provides some additional functionality. 46 // 47 // If you're writing cross-platform code that deals with actual files, you 48 // should generally use base::File instead which can be constructed with a 49 // handle, and in addition to handling ownership, has convenient cross-platform 50 // file manipulation functions on it. 51 typedef ScopedGeneric<int, internal::ScopedFDCloseTraits> ScopedFD; 52 #endif 53 54 // Automatically closes |FILE*|s. 55 typedef std::unique_ptr<FILE, internal::ScopedFILECloser> ScopedFILE; 56 57 } // namespace base 58 59 #endif // BASE_FILES_SCOPED_FILE_H_ 60