mem

Documentation

Index

• Constants
• func RoundToAlign(x, align uint32) uint32
• func ZeroMem(addr uintptr, size int)
• type ArenaAllocator
  • func NewArenaAllocator(capacity, align uint32) *ArenaAllocator
  • func (this *ArenaAllocator) Alloc(size uint32) (addr MemPtr, allocSize uint32)
  • func (this *ArenaAllocator) AllocBytes(data []byte) MemPtr
  • func (this *ArenaAllocator) AllocBytesBegin() MemPtr
  • func (this *ArenaAllocator) AllocBytesEnd(addr MemPtr)
  • func (this *ArenaAllocator) AllocWithClear(size uint32) (addr MemPtr, allocSize uint32)
  • func (this *ArenaAllocator) AppendByte(data byte) bool
  • func (this *ArenaAllocator) AppendByteNoCheck(data byte)
  • func (this *ArenaAllocator) AppendBytes(data []byte) bool
  • func (this *ArenaAllocator) Capacity() uint32
  • func (this *ArenaAllocator) Clone() *ArenaAllocator
  • func (this *ArenaAllocator) FreeAll()
  • func (this *ArenaAllocator) FreePart(remain uint32)
  • func (this *ArenaAllocator) GetString(addr MemPtr) string
  • func (this *ArenaAllocator) GetUintptr(addr MemPtr) uintptr
  • func (this *ArenaAllocator) Init(capacity uint32) *ArenaAllocator
  • func (this *ArenaAllocator) Left() uint32
  • func (this *ArenaAllocator) Print(w io.Writer, memBegin, memEnd int)
  • func (this *ArenaAllocator) PrintAll(w io.Writer)
  • func (this *ArenaAllocator) PrintBrief(w io.Writer)
  • func (this *ArenaAllocator) PrintUsed(w io.Writer)
  • func (this *ArenaAllocator) Stat() *ArenaAllocatorStat
  • func (this *ArenaAllocator) String() string
  • func (this *ArenaAllocator) Strlen(addr MemPtr) int
  • func (this *ArenaAllocator) Used() uint32
  • func (this *ArenaAllocator) ZeroMem(addr MemPtr, num uint32)
• type ArenaAllocatorStat
  • func (this *ArenaAllocatorStat) AllocNum() StatNumber
  • func (this *ArenaAllocatorStat) AllocNumOk() StatNumber
  • func (this *ArenaAllocatorStat) ClearAllocNum()
  • func (this *ArenaAllocatorStat) FreeAllNum() StatNumber
  • func (this *ArenaAllocatorStat) FreePartNum() StatNumber
  • func (this *ArenaAllocatorStat) Init()
  • func (this *ArenaAllocatorStat) Print(w io.Writer)
  • func (this *ArenaAllocatorStat) String() string
• type MemPtr
  • func MemPtrSetUint(value MemPtr) MemPtr
  • func (p MemPtr) GetUint() uint
  • func (p MemPtr) IsUint() bool
• type StatNumber

Constants

const (
	MEM_PTR_BITS = unsafe.Sizeof(MemPtr(0)) * 8
	MEM_PTR_BIT  = MemPtr(1 << (MEM_PTR_BITS - 1))
	MEM_PTR_MASK = MemPtr(^MEM_PTR_BIT)
)

const ARENA_ALLOCATOR_PREFIX_LEN = 8

const MEM_PTR_NIL = MemPtr(0)

Functions

func RoundToAlign

func RoundToAlign(x, align uint32) uint32

func ZeroMem

func ZeroMem(addr uintptr, size int)

Types

type ArenaAllocator

type ArenaAllocator struct {
	ArenaAllocatorStat
	// contains filtered or unexported fields
}

ArenaAllocator is a memory allocator for text/binary protocol processing,

it allocates memories and does not deallocate every memories which have
been allocated. It deallacator all memories by FreeAll.

ArenaAllocator has no lock, so it is not gorouting safe, each gorouting
should use their own ArenaAllocator

ArenaAllocator allocates memory fast and support alloctes memory when parsing.
ArenaAllocator can be reused when one protocol message is processed completed.

func NewArenaAllocator

func NewArenaAllocator(capacity, align uint32) *ArenaAllocator

align must be power of 2

func (*ArenaAllocator) Alloc

func (this *ArenaAllocator) Alloc(size uint32) (addr MemPtr, allocSize uint32)

func (*ArenaAllocator) AllocBytes

func (this *ArenaAllocator) AllocBytes(data []byte) MemPtr

func (*ArenaAllocator) AllocBytesBegin

func (this *ArenaAllocator) AllocBytesBegin() MemPtr

func (*ArenaAllocator) AllocBytesEnd

func (this *ArenaAllocator) AllocBytesEnd(addr MemPtr)

func (*ArenaAllocator) AllocWithClear

func (this *ArenaAllocator) AllocWithClear(size uint32) (addr MemPtr, allocSize uint32)

func (*ArenaAllocator) AppendByte

func (this *ArenaAllocator) AppendByte(data byte) bool

func (*ArenaAllocator) AppendByteNoCheck

func (this *ArenaAllocator) AppendByteNoCheck(data byte)

func (*ArenaAllocator) AppendBytes

func (this *ArenaAllocator) AppendBytes(data []byte) bool

func (*ArenaAllocator) Capacity

func (this *ArenaAllocator) Capacity() uint32

func (*ArenaAllocator) Clone

func (this *ArenaAllocator) Clone() *ArenaAllocator

func (*ArenaAllocator) FreeAll

func (this *ArenaAllocator) FreeAll()

func (*ArenaAllocator) FreePart

func (this *ArenaAllocator) FreePart(remain uint32)

func (*ArenaAllocator) GetString

func (this *ArenaAllocator) GetString(addr MemPtr) string

func (*ArenaAllocator) GetUintptr

func (this *ArenaAllocator) GetUintptr(addr MemPtr) uintptr

func (*ArenaAllocator) Init

func (this *ArenaAllocator) Init(capacity uint32) *ArenaAllocator

func (*ArenaAllocator) Left

func (this *ArenaAllocator) Left() uint32

func (*ArenaAllocator) Print

func (this *ArenaAllocator) Print(w io.Writer, memBegin, memEnd int)

func (*ArenaAllocator) PrintAll

func (this *ArenaAllocator) PrintAll(w io.Writer)

func (*ArenaAllocator) PrintBrief

func (this *ArenaAllocator) PrintBrief(w io.Writer)

func (*ArenaAllocator) PrintUsed

func (this *ArenaAllocator) PrintUsed(w io.Writer)

func (*ArenaAllocator) Stat

func (this *ArenaAllocator) Stat() *ArenaAllocatorStat

func (*ArenaAllocator) String

func (this *ArenaAllocator) String() string

func (*ArenaAllocator) Strlen

func (this *ArenaAllocator) Strlen(addr MemPtr) int

func (*ArenaAllocator) Used

func (this *ArenaAllocator) Used() uint32

func (*ArenaAllocator) ZeroMem

func (this *ArenaAllocator) ZeroMem(addr MemPtr, num uint32)

type ArenaAllocatorStat

type ArenaAllocatorStat struct {
	// contains filtered or unexported fields
}

func (*ArenaAllocatorStat) AllocNum

func (this *ArenaAllocatorStat) AllocNum() StatNumber

func (*ArenaAllocatorStat) AllocNumOk

func (this *ArenaAllocatorStat) AllocNumOk() StatNumber

func (*ArenaAllocatorStat) ClearAllocNum

func (this *ArenaAllocatorStat) ClearAllocNum()

func (*ArenaAllocatorStat) FreeAllNum

func (this *ArenaAllocatorStat) FreeAllNum() StatNumber

func (*ArenaAllocatorStat) FreePartNum

func (this *ArenaAllocatorStat) FreePartNum() StatNumber

func (*ArenaAllocatorStat) Init

func (this *ArenaAllocatorStat) Init()

func (*ArenaAllocatorStat) Print

func (this *ArenaAllocatorStat) Print(w io.Writer)

func (*ArenaAllocatorStat) String

func (this *ArenaAllocatorStat) String() string

type MemPtr

type MemPtr uint16

MemPtr save a integer value or a address shift of memory. * If highest bit is 1, it save a integer value, integer value range is between * 0 ~ 2**sizeof(MemPtr)-1

func MemPtrSetUint

func MemPtrSetUint(value MemPtr) MemPtr

func (MemPtr) GetUint

func (p MemPtr) GetUint() uint

func (MemPtr) IsUint

func (p MemPtr) IsUint() bool

type StatNumber

type StatNumber = uint64