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// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_MAC_SCOPED_CFFILEDESCRIPTORREF_H_
#define BASE_MAC_SCOPED_CFFILEDESCRIPTORREF_H_
#include <CoreFoundation/CoreFoundation.h>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
namespace base {
namespace mac {
// ScopedCFFileDescriptorRef is designed after ScopedCFTypeRef<>. On
// destruction, it will invalidate the file descriptor.
// ScopedCFFileDescriptorRef (unlike ScopedCFTypeRef<>) does not support RETAIN
// semantics, copying, or assignment, as doing so would increase the chances
// that a file descriptor is invalidated while still in use.
class ScopedCFFileDescriptorRef {
public:
explicit ScopedCFFileDescriptorRef(CFFileDescriptorRef fdref = NULL)
: fdref_(fdref) {
}
~ScopedCFFileDescriptorRef() {
if (fdref_) {
CFFileDescriptorInvalidate(fdref_);
CFRelease(fdref_);
}
}
void reset(CFFileDescriptorRef fdref = NULL) {
if (fdref_ == fdref)
return;
if (fdref_) {
CFFileDescriptorInvalidate(fdref_);
CFRelease(fdref_);
}
fdref_ = fdref;
}
bool operator==(CFFileDescriptorRef that) const {
return fdref_ == that;
}
bool operator!=(CFFileDescriptorRef that) const {
return fdref_ != that;
}
operator CFFileDescriptorRef() const {
return fdref_;
}
CFFileDescriptorRef get() const {
return fdref_;
}
CFFileDescriptorRef release() WARN_UNUSED_RESULT {
CFFileDescriptorRef temp = fdref_;
fdref_ = NULL;
return temp;
}
private:
CFFileDescriptorRef fdref_;
DISALLOW_COPY_AND_ASSIGN(ScopedCFFileDescriptorRef);
};
} // namespace mac
} // namespace base
#endif // BASE_MAC_SCOPED_CFFILEDESCRIPTORREF_H_
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