README
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Copied from https://github.com/cloudfoundry/go-diodes to avoid test dependencies.
Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
This section is empty.
Functions ¶
This section is empty.
Types ¶
type AlertFunc ¶
type AlertFunc func(missed int)
AlertFunc type is an adapter to allow the use of ordinary functions as Alert handlers.
type Alerter ¶
type Alerter interface {
Alert(missed int)
}
Alerter is used to report how many values were overwritten since the last write.
type Diode ¶
type Diode interface {
Set(GenericDataType)
TryNext() (GenericDataType, bool)
}
Diode is any implementation of a diode.
type GenericDataType ¶
GenericDataType is the data type the diodes operate on.
type ManyToOne ¶
type ManyToOne struct {
// contains filtered or unexported fields
}
ManyToOne diode is optimal for many writers (go-routines B-n) and a single reader (go-routine A). It is not thread safe for multiple readers.
func NewManyToOne ¶
NewManyToOne creates a new diode (ring buffer). The ManyToOne diode is optimzed for many writers (on go-routines B-n) and a single reader (on go-routine A). The alerter is invoked on the read's go-routine. It is called when it notices that the writer go-routine has passed it and wrote over data. A nil can be used to ignore alerts.
func (*ManyToOne) Set ¶
func (d *ManyToOne) Set(data GenericDataType)
Set sets the data in the next slot of the ring buffer.
func (*ManyToOne) TryNext ¶
func (d *ManyToOne) TryNext() (data GenericDataType, ok bool)
TryNext will attempt to read from the next slot of the ring buffer. If there is not data available, it will return (nil, false).
type OneToOne ¶
type OneToOne struct {
// contains filtered or unexported fields
}
OneToOne diode is meant to be used by a single reader and a single writer. It is not thread safe if used otherwise.
func NewOneToOne ¶
NewOneToOne creates a new diode is meant to be used by a single reader and a single writer. The alerter is invoked on the read's go-routine. It is called when it notices that the writer go-routine has passed it and wrote over data. A nil can be used to ignore alerts.
func (*OneToOne) Set ¶
func (d *OneToOne) Set(data GenericDataType)
Set sets the data in the next slot of the ring buffer.
func (*OneToOne) TryNext ¶
func (d *OneToOne) TryNext() (data GenericDataType, ok bool)
TryNext will attempt to read from the next slot of the ring buffer. If there is no data available, it will return (nil, false).
type Poller ¶
type Poller struct {
Diode
// contains filtered or unexported fields
}
Poller will poll a diode until a value is available.
func NewPoller ¶
func NewPoller(d Diode, opts ...PollerConfigOption) *Poller
NewPoller returns a new Poller that wraps the given diode.
func (*Poller) Next ¶
func (p *Poller) Next() GenericDataType
Next polls the diode until data is available or until the context is done. If the context is done, then nil will be returned.
type PollerConfigOption ¶
type PollerConfigOption func(*Poller)
PollerConfigOption can be used to setup the poller.
func WithPollingContext ¶
func WithPollingContext(ctx context.Context) PollerConfigOption
WithPollingContext sets the context to cancel any retrieval (Next()). It will not change any results for adding data (Set()). Default is context.Background().
func WithPollingInterval ¶
func WithPollingInterval(interval time.Duration) PollerConfigOption
WithPollingInterval sets the interval at which the diode is queried for new data. The default is 10ms.
type Waiter ¶
type Waiter struct {
Diode
// contains filtered or unexported fields
}
Waiter will use a conditional mutex to alert the reader to when data is available.
func NewWaiter ¶
func NewWaiter(d Diode, opts ...WaiterConfigOption) *Waiter
NewWaiter returns a new Waiter that wraps the given diode.
func (*Waiter) Next ¶
func (w *Waiter) Next() GenericDataType
Next returns the next data point on the wrapped diode. If there is not any new data, it will Wait for set to be called or the context to be done. If the context is done, then nil will be returned.
func (*Waiter) Set ¶
func (w *Waiter) Set(data GenericDataType)
Set invokes the wrapped diode's Set with the given data and uses Broadcast to wake up any readers.
type WaiterConfigOption ¶
type WaiterConfigOption func(*Waiter)
WaiterConfigOption can be used to setup the waiter.
func WithWaiterContext ¶
func WithWaiterContext(ctx context.Context) WaiterConfigOption
WithWaiterContext sets the context to cancel any retrieval (Next()). It will not change any results for adding data (Set()). Default is context.Background().
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