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windows: use cgo.Handle for service object #158

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windows: use cgo.Handle for service object #158

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5 changes: 3 additions & 2 deletions windows/svc/service.go
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ package svc

import (
"errors"
"runtime/cgo"
"sync"
"unsafe"

Expand Down Expand Up @@ -192,7 +193,7 @@ var (
)

func ctlHandler(ctl, evtype, evdata, context uintptr) uintptr {
s := (*service)(unsafe.Pointer(context))
s := cgo.Handle(context).Value().(service)
e := ctlEvent{cmd: Cmd(ctl), eventType: uint32(evtype), eventData: evdata, context: 123456} // Set context to 123456 to test issue #25660.
s.c <- e
return 0
Expand All @@ -203,7 +204,7 @@ var theService service // This is, unfortunately, a global, which means only one
// serviceMain is the entry point called by the service manager, registered earlier by
// the call to StartServiceCtrlDispatcher.
func serviceMain(argc uint32, argv **uint16) uintptr {
handle, err := windows.RegisterServiceCtrlHandlerEx(windows.StringToUTF16Ptr(theService.name), ctlHandlerCallback, uintptr(unsafe.Pointer(&theService)))
handle, err := windows.RegisterServiceCtrlHandlerEx(windows.StringToUTF16Ptr(theService.name), ctlHandlerCallback, uintptr(cgo.NewHandle(theService)))
if sysErr, ok := err.(windows.Errno); ok {
return uintptr(sysErr)
} else if err != nil {
Expand Down