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71 lines
1.8 KiB
71 lines
1.8 KiB
4 months ago
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_CMDLINE_MEMORY_REPRESENTATION_H_
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#define ART_CMDLINE_MEMORY_REPRESENTATION_H_
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#include <assert.h>
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#include <ostream>
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#include <string>
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#include "base/bit_utils.h"
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namespace art {
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// An integral representation of bytes of memory.
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// The underlying runtime size_t value is guaranteed to be a multiple of Divisor.
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template <size_t kDivisor = 1024>
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struct Memory {
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static_assert(IsPowerOfTwo(kDivisor), "Divisor must be a power of 2");
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static Memory<kDivisor> FromBytes(size_t bytes) {
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assert(bytes % kDivisor == 0);
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return Memory<kDivisor>(bytes);
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}
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Memory() : Value(0u) {}
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Memory(size_t value) : Value(value) { // NOLINT [runtime/explicit] [5]
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assert(value % kDivisor == 0);
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}
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operator size_t() const { return Value; }
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size_t ToBytes() const {
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return Value;
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}
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static const char* Name() {
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static std::string str;
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if (str.empty()) {
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str = "Memory<" + std::to_string(kDivisor) + '>';
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}
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return str.c_str();
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}
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size_t Value;
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};
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template <size_t kDivisor>
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std::ostream& operator<<(std::ostream& stream, Memory<kDivisor> memory) {
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return stream << memory.Value << '*' << kDivisor;
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}
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using MemoryKiB = Memory<1024>;
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} // namespace art
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#endif // ART_CMDLINE_MEMORY_REPRESENTATION_H_
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