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// Copyright 2014 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef COBALT_CSS_PARSER_REF_COUNTED_UTIL_H_
#define COBALT_CSS_PARSER_REF_COUNTED_UTIL_H_
#include "base/logging.h"
#include "base/memory/ref_counted.h"
namespace cobalt {
namespace css_parser {
// Handy way to add a reference to a newly created object:
//
// A* a = AddRef(new A());
//
// NULL pointers are allowed and are simply passed through.
//
// Use of manually managed reference-counted objects should be limited
// to the code that interfaces with C-style APIs, for example Bison's
// YYSTYPE union.
template <typename T>
inline T* AddRef(T* ptr) {
if (ptr) {
ptr->AddRef();
}
return ptr;
}
template <typename T>
inline void SafeRelease(T* ptr) {
if (ptr) {
ptr->Release();
}
}
// Takes ownership over reference-counted object.
// NULL pointers are allowed.
template <typename T>
inline scoped_refptr<T> MakeScopedRefPtrAndRelease(T* ptr) {
scoped_refptr<T> refptr(ptr);
SafeRelease(ptr);
return refptr;
}
} // namespace css_parser
} // namespace cobalt
#endif // COBALT_CSS_PARSER_REF_COUNTED_UTIL_H_