| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * 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 ART_CMDLINE_MEMORY_REPRESENTATION_H_ |
| #define ART_CMDLINE_MEMORY_REPRESENTATION_H_ |
| |
| #include <string> |
| #include <assert.h> |
| #include <ostream> |
| #include "utils.h" |
| |
| namespace art { |
| |
| // An integral representation of bytes of memory. |
| // The underlying runtime size_t value is guaranteed to be a multiple of Divisor. |
| template <size_t Divisor = 1024> |
| struct Memory { |
| static_assert(IsPowerOfTwo(Divisor), "Divisor must be a power of 2"); |
| |
| static Memory<Divisor> FromBytes(size_t bytes) { |
| assert(bytes % Divisor == 0); |
| return Memory<Divisor>(bytes); |
| } |
| |
| Memory() : Value(0u) {} |
| Memory(size_t value) : Value(value) { // NOLINT [runtime/explicit] [5] |
| assert(value % Divisor == 0); |
| } |
| operator size_t() const { return Value; } |
| |
| size_t ToBytes() const { |
| return Value; |
| } |
| |
| static constexpr size_t kDivisor = Divisor; |
| |
| static const char* Name() { |
| static std::string str; |
| if (str.empty()) { |
| str = "Memory<" + std::to_string(Divisor) + '>'; |
| } |
| |
| return str.c_str(); |
| } |
| |
| size_t Value; |
| }; |
| |
| template <size_t Divisor> |
| std::ostream& operator<<(std::ostream& stream, Memory<Divisor> memory) { |
| return stream << memory.Value << '*' << Divisor; |
| } |
| |
| using MemoryKiB = Memory<1024>; |
| |
| } // namespace art |
| |
| #endif // ART_CMDLINE_MEMORY_REPRESENTATION_H_ |