Expose stop service advertisment on Windows

adapter_windows.go

@@ -7,6 +7,7 @@ import (
 	"github.com/go-ole/go-ole"
 	"github.com/saltosystems/winrt-go"
 	"github.com/saltosystems/winrt-go/windows/devices/bluetooth/advertisement"
+	"github.com/saltosystems/winrt-go/windows/devices/bluetooth/genericattributeprofile"
 	"github.com/saltosystems/winrt-go/windows/foundation"
 )
 
@@ -16,6 +17,8 @@ type Adapter struct {
 	connectHandler func(device Device, connected bool)
 
 	defaultAdvertisement *Advertisement
+
+	gattServiceProvider *genericattributeprofile.GattServiceProvider
 }
 
 // DefaultAdapter is the default adapter on the system.

gatts_linux.go

@@ -71,6 +71,12 @@ func (c *bluezChar) WriteValue(value []byte, options map[string]dbus.Variant) *d
 	return nil
 }
 
+func (a *Adapter) StopServiceAdvertisement() error {
+	// TODO: implement on linux
+
+	return nil
+}
+
 // AddService creates a new service with the characteristics listed in the
 // Service struct.
 func (a *Adapter) AddService(s *Service) error {

gatts_windows.go

@@ -49,6 +49,8 @@ func (a *Adapter) AddService(s *Service) error {
 		return err
 	}
 
+	a.gattServiceProvider = serviceProvider
+
 	localService, err := serviceProvider.GetService()
 	if err != nil {
 		return err
@@ -237,6 +239,10 @@ func (a *Adapter) AddService(s *Service) error {
 	return serviceProvider.StartAdvertisingWithParameters(params)
 }
 
+func (a *Adapter) StopServiceAdvertisement() error {
+	return a.gattServiceProvider.StopAdvertising()
+}
+
 // Write replaces the characteristic value with a new value.
 func (c *Characteristic) Write(p []byte) (n int, err error) {
 	length := len(p)