//export gostream
func gostream(_, ctx unsafe.Pointer, n C.size_t, paths, flags, ids uintptr) {
const (
offchar = unsafe.Sizeof((*C.char)(nil))
offflag = unsafe.Sizeof(C.FSEventStreamEventFlags(0))
offid = unsafe.Sizeof(C.FSEventStreamEventId(0))
)
if n == 0 {
return
}
ev := make([]FSEvent, 0, int(n))
for i := uintptr(0); i < uintptr(n); i++ {
switch flags := *(*uint32)(unsafe.Pointer((flags + i*offflag))); {
case flags&uint32(FSEventsEventIdsWrapped) != 0:
atomic.StoreUint64(&since, uint64(C.FSEventsGetCurrentEventId()))
default:
ev = append(ev, FSEvent{
Path: C.GoString(*(**C.char)(unsafe.Pointer(paths + i*offchar))),
Flags: flags,
ID: *(*uint64)(unsafe.Pointer(ids + i*offid)),
})
}
}
(*(*streamFunc)(ctx))(ev)
}
// LatestEventID returns the most recently generated event ID, system-wide.
func LatestEventID() uint64 {
return uint64(C.FSEventsGetCurrentEventId())
}
import (
"errors"
"os"
"sync"
"sync/atomic"
"time"
"unsafe"
)
var nilstream C.FSEventStreamRef
// Default arguments for FSEventStreamCreate function.
var (
latency C.CFTimeInterval
flags = C.FSEventStreamCreateFlags(C.kFSEventStreamCreateFlagFileEvents | C.kFSEventStreamCreateFlagNoDefer)
since = uint64(C.FSEventsGetCurrentEventId())
)
var runloop C.CFRunLoopRef // global runloop which all streams are registered with
var wg sync.WaitGroup // used to wait until the runloop starts
// source is used for synchronization purposes - it signals when runloop has
// started and is ready via the wg. It also serves purpose of a dummy source,
// thanks to it the runloop does not return as it also has at least one source
// registered.
var source = C.CFRunLoopSourceCreate(nil, 0, &C.CFRunLoopSourceContext{
perform: (C.CFRunLoopPerformCallBack)(C.gosource),
})
// Errors returned when FSEvents functions fail.
var (
// https://developer.apple.com/library/mac/documentation/Darwin/Reference/FSEvents_Ref/Reference/reference.html#jumpTo_4
func Current() EventID {
return EventID(C.FSEventsGetCurrentEventId())
}