// Stop stops underlying FSEventStream and unregisters it from global runloop.
func (s *stream) Stop() {
if s.ref == nilstream {
return
}
wg.Wait()
C.FSEventStreamStop(s.ref)
C.FSEventStreamInvalidate(s.ref)
C.CFRunLoopWakeUp(runloop)
s.ref = nilstream
}
// Start creates a FSEventStream for the given path and schedules it with
// global runloop. It's a nop if the stream was already started.
func (s *stream) Start() error {
if s.ref != nilstream {
return nil
}
wg.Wait()
p := C.CFStringCreateWithCStringNoCopy(nil, C.CString(s.path), C.kCFStringEncodingUTF8, nil)
path := C.CFArrayCreate(nil, (*unsafe.Pointer)(unsafe.Pointer(&p)), 1, nil)
ref := C.FSEventStreamCreate(nil, (C.FSEventStreamCallback)(C.gostream),
&s.ctx, path, C.FSEventStreamEventId(atomic.LoadUint64(&since)), latency, flags)
if ref == nilstream {
return errCreate
}
C.FSEventStreamScheduleWithRunLoop(ref, runloop, C.kCFRunLoopDefaultMode)
if C.FSEventStreamStart(ref) == C.Boolean(0) {
C.FSEventStreamInvalidate(ref)
return errStart
}
C.CFRunLoopWakeUp(runloop)
s.ref = ref
return nil
}