Use event functions from golang.org/x/sys/windows

Use CreateEvent, OpenEvent (which both map to the respective *EventW
function) and PulseEvent from golang.org/x/sys instead of local copies.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Upstream-commit: e942513ac46656c3f54cd103e990e2b7bd5c2b14
Component: engine

components/engine/integration-cli/daemon/daemon_windows.go

@@ -3,47 +3,19 @@ package daemon
 import (
 	"fmt"
 	"strconv"
-	"syscall"
-	"unsafe"
 
 	"github.com/go-check/check"
 	"golang.org/x/sys/windows"
 )
 
-func openEvent(desiredAccess uint32, inheritHandle bool, name string, proc *windows.LazyProc) (handle windows.Handle, err error) {
-	namep, _ := windows.UTF16PtrFromString(name)
-	var _p2 uint32
-	if inheritHandle {
-		_p2 = 1
-	}
-	r0, _, e1 := proc.Call(uintptr(desiredAccess), uintptr(_p2), uintptr(unsafe.Pointer(namep)))
-	handle = windows.Handle(r0)
-	if handle == windows.InvalidHandle {
-		err = e1
-	}
-	return
-}
-
-func pulseEvent(handle windows.Handle, proc *windows.LazyProc) (err error) {
-	r0, _, _ := proc.Call(uintptr(handle))
-	if r0 != 0 {
-		err = syscall.Errno(r0)
-	}
-	return
-}
-
 // SignalDaemonDump sends a signal to the daemon to write a dump file
 func SignalDaemonDump(pid int) {
-	modkernel32 := windows.NewLazySystemDLL("kernel32.dll")
-	procOpenEvent := modkernel32.NewProc("OpenEventW")
-	procPulseEvent := modkernel32.NewProc("PulseEvent")
-
-	ev := "Global\\docker-daemon-" + strconv.Itoa(pid)
-	h2, _ := openEvent(0x0002, false, ev, procOpenEvent)
-	if h2 == 0 {
+	ev, _ := windows.UTF16PtrFromString("Global\\docker-daemon-" + strconv.Itoa(pid))
+	h2, err := windows.OpenEvent(0x0002, false, ev)
+	if h2 == 0 || err != nil {
 		return
 	}
-	pulseEvent(h2, procPulseEvent)
+	windows.PulseEvent(h2)
 }
 
 func signalDaemonReload(pid int) error {