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/*
* Copyright (c) Facebook, Inc. and its affiliates.
* All rights reserved.
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree.
*/
#pragma once
#include <map>
namespace fbgemm {
/**
* @brief Thread safe cache for microkernels, ensures single creation per key.
* @tparam Key Type of unique key (typically a tuple)
* @tparam Value Type of the microkernel function (Typically a function pointer)
*/
template <typename KEY, typename VALUE>
class CodeCache {
private:
std::map<KEY, VALUE> values_;
public:
CodeCache(const CodeCache&) = delete;
CodeCache& operator=(const CodeCache&) = delete;
CodeCache(){};
VALUE getOrCreate(const KEY& key, std::function<VALUE()> generatorFunction) {
auto it = values_.find(key);
if (it != values_.end()) {
return it->second;
} else {
//std::cerr << "create" << std::endl;
auto fn = generatorFunction();
values_[key] = fn;
return fn;
}
}
};
} // namespace fbgemm
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