ActiveGo 1.8Package util
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func IsText ¶
func IsText(s []byte) bool
IsText reports whether a significant prefix of s looks like correct UTF-8; that is, if it is likely that s is human-readable text.
func IsTextFile ¶
func IsTextFile(fs vfs.Opener, filename string) bool
IsTextFile reports whether the file has a known extension indicating a text file, or if a significant chunk of the specified file looks like correct UTF-8; that is, if it is likely that the file contains human- readable text.
type RWValue ¶
An RWValue wraps a value and permits mutually exclusive access to it and records the time the value was last set.
type RWValue struct {
// contains filtered or unexported fields
}
func (*RWValue) Get ¶
func (v *RWValue) Get() (interface{}, time.Time)
func (*RWValue) Set ¶
func (v *RWValue) Set(value interface{})
type Throttle ¶
A Throttle permits throttling of a goroutine by calling the Throttle method repeatedly.
type Throttle struct {
// contains filtered or unexported fields
}
func NewThrottle ¶
func NewThrottle(r float64, dt time.Duration) *Throttle
NewThrottle creates a new Throttle with a throttle value r and a minimum allocated run time slice of dt:
r == 0: "empty" throttle; the goroutine is always sleeping r == 1: full throttle; the goroutine is never sleeping
A value of r == 0.6 throttles a goroutine such that it runs approx. 60% of the time, and sleeps approx. 40% of the time. Values of r < 0 or r > 1 are clamped down to values between 0 and 1. Values of dt < 0 are set to 0.
func (*Throttle) Throttle ¶
func (p *Throttle) Throttle()
Throttle calls time.Sleep such that over time the ratio tr/ts between accumulated run (tr) and sleep times (ts) approximates the value 1/(1-r) where r is the throttle value. Throttle returns immediately (w/o sleeping) if less than tm ns have passed since the last call to Throttle.