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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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* See the License for the specific language governing permissions and
* limitations under the License.
#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;
const int kWordHighBitMask = 1 << (kBitsPerWord - 1);
// Required stack alignment
const int kStackAlignment = 16;
// Required object alignment
const int kObjectAlignment = 8;
// ARM instruction alignment. ARM processors require code to be 4-byte aligned,
// but ARM ELF requires 8..
const int kArmAlignment = 8;
// MIPS instruction alignment. MIPS processors require code to be 4-byte aligned.
// TODO: Can this be 4?
const int kMipsAlignment = 8;
// X86 instruction alignment. This is the recommended alignment for maximum performance.
const int kX86Alignment = 16;
// System page size. We check this against sysconf(_SC_PAGE_SIZE) at runtime, but use a simple
// compile-time constant so the compiler can generate better code.
const int kPageSize = 4096;
// Whether or not this is a debug build. Useful in conditionals where NDEBUG isn't.
#if defined(NDEBUG)
const bool kIsDebugBuild = false;
const bool kIsDebugBuild = true;
// Whether or not this is a target (vs host) build. Useful in conditionals where ART_TARGET isn't.
#if defined(ART_TARGET)
const bool kIsTargetBuild = true;
const bool kIsTargetBuild = false;
} // namespace art
#endif // ART_SRC_GLOBALS_H_