unique_id.h

// =====================================================================================================================
// Copyright 2024 Medusa Slockbower
// 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 ENGINE_UNIQUEID_H
#define ENGINE_UNIQUEID_H
 
#include "types.h"
 
namespace open_cpp_utils
{
 
// Internal function for incrementing an id associated with a type
template<typename Base> uint64_t _increment_id()
{
    static uint64_t current = 0;
    return current++;
}
 
template<typename Base, typename Type> uint64_t unique_id()
{
    static bool initialized = false;
    static uint64_t id = 0;
 
    if(initialized) return id;
    initialized = true;
    return id = _increment_id<Base>();
}
 
}
 
#endif //ENGINE_UNIQUEID_H