// Test task
static async Task TestAsync(CancellationToken token)
{
using (var awaiter = new Awaiter())
{
WaitOrTimerCallbackProc callback = (a, b) =>
awaiter.Continue();
IntPtr timerHandle;
if (!CreateTimerQueueTimer(out timerHandle,
IntPtr.Zero,
callback,
IntPtr.Zero, 500, 500, 0))
{
throw new System.ComponentModel.Win32Exception(
Marshal.GetLastWin32Error());
}
try
{
var i = 0;
while (true)
{
token.ThrowIfCancellationRequested();
await awaiter;
Console.WriteLine("tick: " + i++);
}
}
finally
{
DeleteTimerQueueTimer(IntPtr.Zero, timerHandle, IntPtr.Zero);
}
}
}
static async Task TestAsync()
{
var tcs = new TaskCompletionSource <bool>();
WaitOrTimerCallbackProc callback = (a, b) =>
tcs.TrySetResult(true);
//var gch = GCHandle.Alloc(tcs);
try
{
IntPtr timerHandle;
if (!CreateTimerQueueTimer(out timerHandle,
IntPtr.Zero,
callback,
IntPtr.Zero, 2000, 0, 0))
{
throw new System.ComponentModel.Win32Exception(
Marshal.GetLastWin32Error());
}
await tcs.Task;
}
finally
{
//gch.Free();
GC.KeepAlive(callback);
}
}
public static extern bool CreateTimerQueueTimer(out IntPtr phNewTimer,
IntPtr TimerQueue, WaitOrTimerCallbackProc Callback, IntPtr Parameter,
uint DueTime, uint Period, UIntPtr Flags);
