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base / apple / scoped_dispatch_object.h [blame]
// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_APPLE_SCOPED_DISPATCH_OBJECT_H_
#define BASE_APPLE_SCOPED_DISPATCH_OBJECT_H_
#include <dispatch/dispatch.h>
#include "base/apple/scoped_typeref.h"
#if __OBJC__
// In Objective-C ARC, dispatch types are Objective-C types, and must be managed
// as such with __strong, etc. This header file must not be included in
// Objective-C code, nor may it be allowed to be recursively included. Use the
// pimpl pattern to isolate its use in a pure C++ file if needed.
#error Do not use this file, or allow it to be included, in Objective-C code.
#endif
namespace base::apple {
namespace internal {
template <typename T>
struct ScopedDispatchObjectTraits {
static constexpr T InvalidValue() { return nullptr; }
static T Retain(T object) {
dispatch_retain(object);
return object;
}
static void Release(T object) { dispatch_release(object); }
};
} // namespace internal
template <typename T>
using ScopedDispatchObject =
ScopedTypeRef<T, internal::ScopedDispatchObjectTraits<T>>;
} // namespace base::apple
#endif // BASE_APPLE_SCOPED_DISPATCH_OBJECT_H_