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// Copyright 2020 The Dawn Authors
//
// 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 COMMON_PLACEMENTALLOCATED_H_
#define COMMON_PLACEMENTALLOCATED_H_
#include <cstddef>
class PlacementAllocated {
public:
// Delete the default new operator so this can only be created with placement new.
void* operator new(size_t) = delete;
void* operator new(size_t size, void* ptr) {
// Pass through the pointer of the allocation. This is essentially the default
// placement-new implementation, but we must define it if we delete the default
// new operator.
return ptr;
}
void operator delete(void* ptr) {
// Object is placement-allocated. Don't free the memory.
}
void operator delete(void*, void*) {
// This is added to match new(size_t size, void* ptr)
// Otherwise it triggers C4291 warning in MSVC
}
};
#endif // COMMON_PLACEMENTALLOCATED_H_