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/*
* 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 "base/bit_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 kDivisor = 1024>
struct Memory {
static_assert(IsPowerOfTwo(kDivisor), "Divisor must be a power of 2");
static Memory<kDivisor> FromBytes(size_t bytes) {
assert(bytes % kDivisor == 0);
return Memory<kDivisor>(bytes);
}
Memory() : Value(0u) {}
Memory(size_t value) : Value(value) { // NOLINT [runtime/explicit] [5]
assert(value % kDivisor == 0);
}
operator size_t() const { return Value; }
size_t ToBytes() const {
return Value;
}
static const char* Name() {
static std::string str;
if (str.empty()) {
str = "Memory<" + std::to_string(kDivisor) + '>';
}
return str.c_str();
}
size_t Value;
};
template <size_t kDivisor>
std::ostream& operator<<(std::ostream& stream, Memory<kDivisor> memory) {
return stream << memory.Value << '*' << kDivisor;
}
using MemoryKiB = Memory<1024>;
} // namespace art
#endif // ART_CMDLINE_MEMORY_REPRESENTATION_H_
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