Documentation
¶
Overview ¶
通用的限流器（基于线程并发数）
Index ¶
- Constants
- Variables
- func Equal(u1 UUID, u2 UUID) bool
- func GetPid() uint64
- func RandHit(b1, b2 int32) bool
- func RandInterval(b1, b2 int32) int32
- func RandIntervalN(b1, b2 int32, n uint32) []int32
- func StartProfile(cpuprofile, memprofile string)
- func StopProfile()
- type NullUUID
- type Semaphore
- func (s *Semaphore) Acquire()
- func (s *Semaphore) AcquireContext(ctx context.Context, n int) bool
- func (s *Semaphore) AcquireMany(n int)
- func (s *Semaphore) AcquireWithin(n int, d time.Duration) bool
- func (s *Semaphore) AvailablePermits() int
- func (s *Semaphore) DrainPermits() int
- func (s *Semaphore) Release()
- func (s *Semaphore) ReleaseMany(n int)
- type UUID
- func And(u1 UUID, u2 UUID) UUID
- func FromBytes(input []byte) (u UUID, err error)
- func FromBytesOrNil(input []byte) UUID
- func FromString(input string) (u UUID, err error)
- func FromStringOrNil(input string) UUID
- func NewV1() UUID
- func NewV2(domain byte) UUID
- func NewV3(ns UUID, name string) UUID
- func NewV4() UUID
- func NewV5(ns UUID, name string) UUID
- func Or(u1 UUID, u2 UUID) UUID
- func (u UUID) Bytes() []byte
- func (u UUID) MarshalBinary() (data []byte, err error)
- func (u UUID) MarshalText() (text []byte, err error)
- func (u *UUID) Scan(src interface{}) error
- func (u *UUID) SetVariant()
- func (u *UUID) SetVersion(v byte)
- func (u UUID) String() string
- func (uuid UUID) ToString() string
- func (u *UUID) UnmarshalBinary(data []byte) (err error)
- func (u *UUID) UnmarshalText(text []byte) (err error)
- func (u UUID) Value() (driver.Value, error)
- func (u UUID) Variant() uint
- func (u UUID) Version() uint
Constants ¶
const ( VariantNCS = iota VariantRFC4122 VariantMicrosoft VariantFuture )
UUID layout variants.
const ( DomainPerson = iota DomainGroup DomainOrg )
UUID DCE domains.
Variables ¶
var (
NamespaceDNS, _ = FromString("6ba7b810-9dad-11d1-80b4-00c04fd430c8")
NamespaceURL, _ = FromString("6ba7b811-9dad-11d1-80b4-00c04fd430c8")
NamespaceOID, _ = FromString("6ba7b812-9dad-11d1-80b4-00c04fd430c8")
NamespaceX500, _ = FromString("6ba7b814-9dad-11d1-80b4-00c04fd430c8")
)
Predefined namespace UUIDs.
var Nil = UUID{}
The nil UUID is special form of UUID that is specified to have all 128 bits set to zero.
Functions ¶
func StartProfile ¶
func StartProfile(cpuprofile, memprofile string)
func StopProfile ¶
func StopProfile()
Types ¶
type NullUUID ¶
NullUUID can be used with the standard sql package to represent a UUID value that can be NULL in the database
type Semaphore ¶
type Semaphore struct {
// contains filtered or unexported fields
}
func (*Semaphore) AcquireContext ¶
获取许可，和AcquireMany不同的是，增加了context.Context，方便上下文同步 使用场景父子进程上下文 返回true则获取成功，false则失败
func (*Semaphore) AcquireMany ¶
获取许可，和Acquire不同的是，可以一次获取n个许可 如果不可用，会一直block直到可用
func (*Semaphore) AcquireWithin ¶
获取许可，和AcquireMany不同的是，不会一直block，增加了超时时间d 返回true则获取成功，false则超时失败
type UUID ¶
type UUID [16]byte
UUID representation compliant with specification described in RFC 4122.
func FromBytes ¶
FromBytes returns UUID converted from raw byte slice input. It will return error if the slice isn't 16 bytes long.
func FromBytesOrNil ¶
FromBytesOrNil returns UUID converted from raw byte slice input. Same behavior as FromBytes, but returns a Nil UUID on error.
func FromString ¶
FromString returns UUID parsed from string input. Input is expected in a form accepted by UnmarshalText.
func FromStringOrNil ¶
FromStringOrNil returns UUID parsed from string input. Same behavior as FromString, but returns a Nil UUID on error.
func (UUID) MarshalBinary ¶
MarshalBinary implements the encoding.BinaryMarshaler interface.
func (UUID) MarshalText ¶
MarshalText implements the encoding.TextMarshaler interface. The encoding is the same as returned by String.
func (*UUID) Scan ¶
Scan implements the sql.Scanner interface. A 16-byte slice is handled by UnmarshalBinary, while a longer byte slice or a string is handled by UnmarshalText.
func (*UUID) SetVariant ¶
func (u *UUID) SetVariant()
SetVariant sets variant bits as described in RFC 4122.
func (UUID) String ¶
Returns canonical string representation of UUID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx.
func (*UUID) UnmarshalBinary ¶
UnmarshalBinary implements the encoding.BinaryUnmarshaler interface. It will return error if the slice isn't 16 bytes long.
func (*UUID) UnmarshalText ¶
UnmarshalText implements the encoding.TextUnmarshaler interface. Following formats are supported: "6ba7b810-9dad-11d1-80b4-00c04fd430c8", "{6ba7b810-9dad-11d1-80b4-00c04fd430c8}", "urn:uuid:6ba7b810-9dad-11d1-80b4-00c04fd430c8"
Source Files