sys

package standard library
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Published: Jan 25, 2018 License: BSD-3-Clause Imports: 0 Imported by: 0

Documentation

Overview

package sys contains system- and configuration- and architecture-specific constants used by the runtime.

Index

Constants

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const (
	ArchFamily          = AMD64
	BigEndian           = false
	CacheLineSize       = 64
	DefaultPhysPageSize = 4096
	PCQuantum           = 1
	Int64Align          = 8
	HugePageSize        = 1 << 21
	MinFrameSize        = 0
)
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const GOARCH = `amd64`
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const GOOS = `linux`
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const Goarch386 = 0
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const GoarchAmd64 = 1
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const GoarchAmd64p32 = 0
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const GoarchArm = 0
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const GoarchArm64 = 0
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const GoarchArm64be = 0
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const GoarchArmbe = 0
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const GoarchMips = 0
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const GoarchMips64 = 0
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const GoarchMips64le = 0
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const GoarchMips64p32 = 0
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const GoarchMips64p32le = 0
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const GoarchMipsle = 0
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const GoarchPpc = 0
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const GoarchPpc64 = 0
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const GoarchPpc64le = 0
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const GoarchS390 = 0
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const GoarchS390x = 0
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const GoarchSparc = 0
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const GoarchSparc64 = 0
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const GoosAndroid = 0
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const GoosDarwin = 0
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const GoosDragonfly = 0
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const GoosFreebsd = 0
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const GoosLinux = 1
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const GoosNacl = 0
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const GoosNetbsd = 0
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const GoosOpenbsd = 0
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const GoosPlan9 = 0
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const GoosSolaris = 0
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const GoosWindows = 0
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const GoosZos = 0
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const PtrSize = 4 << (^uintptr(0) >> 63) // unsafe.Sizeof(uintptr(0)) but an ideal const
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const RegSize = 4 << (^Uintreg(0) >> 63) // unsafe.Sizeof(uintreg(0)) but an ideal const
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const SpAlign = 1*(1-GoarchArm64) + 16*GoarchArm64 // SP alignment: 1 normally, 16 for ARM64

Variables

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var DefaultGoroot string // set at link time

Functions

func Bswap32 added in go1.7

func Bswap32(x uint32) uint32

Bswap32 returns its input with byte order reversed 0x01020304 -> 0x04030201

func Bswap64 added in go1.7

func Bswap64(x uint64) uint64

Bswap64 returns its input with byte order reversed 0x0102030405060708 -> 0x0807060504030201

func Ctz32 added in go1.7

func Ctz32(x uint32) int

Ctz32 counts trailing (low-order) zeroes, and if all are zero, then 32.

func Ctz64 added in go1.7

func Ctz64(x uint64) int

Ctz64 counts trailing (low-order) zeroes, and if all are zero, then 64.

Types

type ArchFamilyType added in go1.7

type ArchFamilyType int
const (
	AMD64 ArchFamilyType = iota
	ARM
	ARM64
	I386
	MIPS
	MIPS64
	PPC64
	S390X
)

type Uintreg

type Uintreg uint64

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