public void SetEventHandler(Action handler)
{
if (handler == null)
{
dispatch_source_set_event_handler_f(GetCheckedHandle(), IntPtr.Zero);
return;
}
DispatchBlock.Invoke(
delegate {
var sc = SynchronizationContext.Current;
if (sc == null)
{
SynchronizationContext.SetSynchronizationContext(new DispatchQueueSynchronizationContext(queue));
}
try {
handler();
} finally {
if (sc == null)
{
SynchronizationContext.SetSynchronizationContext(null);
}
}
}, block => dispatch_source_set_event_handler(GetCheckedHandle(), block));
}
public void SetCancelHandler(Action handler)
{
if (handler == null)
{
throw new ArgumentNullException("handler");
}
Check();
unsafe {
DispatchBlock.Invoke(
delegate {
var sc = SynchronizationContext.Current;
if (sc == null)
{
SynchronizationContext.SetSynchronizationContext(new DispatchQueueSynchronizationContext(queue));
}
try {
handler();
} finally {
if (sc == null)
{
SynchronizationContext.SetSynchronizationContext(null);
}
}
}, block => dispatch_source_set_cancel_handler(handle, block));
}
}
public void SetRegistrationHandler(Action handler)
{
if (handler == null)
{
throw new ArgumentNullException("handler");
}
DispatchBlock.Invoke(
delegate {
var sc = SynchronizationContext.Current;
if (sc == null)
{
SynchronizationContext.SetSynchronizationContext(new DispatchQueueSynchronizationContext(queue));
}
try {
handler();
} finally {
if (sc == null)
{
SynchronizationContext.SetSynchronizationContext(null);
}
}
}, block => dispatch_source_set_registration_handler(GetCheckedHandle(), block));
}