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mainthread: add IsRunning method #4

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mainthread: add IsRunning method #4

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12 changes: 8 additions & 4 deletions mainthread.go
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Original file line number Diff line number Diff line change
Expand Up @@ -11,16 +11,14 @@ import (
// The default value is 16 and should be good for 99% usecases.
var CallQueueCap = 16

var (
callQueue chan func()
)
var callQueue chan func()

func init() {
runtime.LockOSThread()
}

func checkRun() {
if callQueue == nil {
if !IsRunning() {
panic(errors.New("mainthread: did not call Run"))
}
}
Expand Down Expand Up @@ -48,6 +46,12 @@ func Run(run func()) {
}
}

// IsRunning returns true if the Run function has already
// been called and is running.
func IsRunning() bool {
return callQueue != nil
}

// CallNonBlock queues function f on the main thread and returns immediately. Does not wait until f
// finishes.
func CallNonBlock(f func()) {
Expand Down