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/*
* Copyright (C) 2011 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_SRC_GLOBALS_H_
#define ART_SRC_GLOBALS_H_
#include <stddef.h>
#include <stdint.h>
namespace art {
typedef uint8_t byte;
typedef intptr_t word;
typedef uintptr_t uword;
const size_t KB = 1024;
const size_t MB = KB * KB;
const size_t GB = KB * KB * KB;
const int kWordSize = sizeof(word);
const int kPointerSize = sizeof(void*);
const int kBitsPerByte = 8;
const int kBitsPerByteLog2 = 3;
const int kBitsPerWord = kWordSize * kBitsPerByte;
// Required stack alignment
const int kStackAlignment = 16;
// Required object alignment
const int kObjectAlignment = 8;
// Required ARM instruction alignment
const int kArmAlignment = 4;
// Required X86 instruction alignment
const int kX86Alignment = 16;
// System page size. Normally you're expected to get this from
// sysconf(_SC_PAGESIZE) or some system-specific define (usually
// PAGESIZE or PAGE_SIZE). If we use a simple compile-time constant
// the compiler can generate appropriate masks directly, so we define
// it here and verify it as the runtime is starting up.
//
// Must be a power of 2.
const int kPageSize = 4096;
} // namespace art
#endif // ART_SRC_GLOBALS_H_
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