sync2

package
v0.3.18 Latest Latest
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Published: Mar 19, 2021 License: MIT Imports: 7 Imported by: 0

Documentation

Overview

Package buffer provides an implementation of an unbounded buffer.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func NewGroup

func NewGroup(c ...uint16) *group

NewGroup 创建一个group对象, 可以带上默认的Context

func Parallel added in v0.3.16

func Parallel(fns ...func(ctx context.Context))

Types

type Event

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

Event represents a one-time event that may occur in the future.

func New

func New() *Event

NewEvent returns a new, ready-to-use Event.

func (*Event) Done

func (e *Event) Done() <-chan struct{}

Done returns a channel that will be closed when Fire is called.

func (*Event) Fire

func (e *Event) Fire() bool

Fire causes e to complete. It is safe to call multiple times, and concurrently. It returns true iff this call to Fire caused the signaling channel returned by Done to close.

func (*Event) HasFired

func (e *Event) HasFired() bool

HasFired returns true if Fire has been called.

type Group

type Group = group

type SpinLock

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

func (*SpinLock) Lock

func (sl *SpinLock) Lock()

func (*SpinLock) TryLock

func (sl *SpinLock) TryLock() bool

func (*SpinLock) Unlock

func (sl *SpinLock) Unlock()

type Unbounded

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

Unbounded is an implementation of an unbounded buffer which does not use extra goroutines. This is typically used for passing updates from one entity to another within gRPC.

All methods on this type are thread-safe and don't block on anything except the underlying mutex used for synchronization.

Unbounded supports values of any type to be stored in it by using a channel of `interface{}`. This means that a call to Put() incurs an extra memory allocation, and also that users need a type assertion while reading. For performance critical code paths, using Unbounded is strongly discouraged and defining a new type specific implementation of this buffer is preferred. See internal/transport/transport.go for an example of this.

func NewUnbounded

func NewUnbounded() *Unbounded

NewUnbounded returns a new instance of Unbounded.

func (*Unbounded) Get

func (b *Unbounded) Get() <-chan interface{}

Get returns a read channel on which values added to the buffer, via Put(), are sent on.

Upon reading a value from this channel, users are expected to call Load() to send the next buffered value onto the channel if there is any.

func (*Unbounded) Load

func (b *Unbounded) Load()

Load sends the earliest buffered data, if any, onto the read channel returned by Get(). Users are expected to call this every time they read a value from the read channel.

func (*Unbounded) Put

func (b *Unbounded) Put(t interface{})

Put adds t to the unbounded buffer.

type WaitGroup

type WaitGroup struct {
	Check      bool
	Concurrent uint16
	// contains filtered or unexported fields
}

func NewWaitGroup

func NewWaitGroup(check bool, c ...uint16) WaitGroup

func (*WaitGroup) Add

func (t *WaitGroup) Add(delta int)

func (*WaitGroup) Count

func (t *WaitGroup) Count() uint16

func (*WaitGroup) Dec

func (t *WaitGroup) Dec()

func (*WaitGroup) Done

func (t *WaitGroup) Done()

func (*WaitGroup) EnableCheck

func (t *WaitGroup) EnableCheck()

func (*WaitGroup) Inc

func (t *WaitGroup) Inc()

func (*WaitGroup) Wait

func (t *WaitGroup) Wait()

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