/// <summary>
/// Returned tasks completes once channel state has become different from
/// given lastObservedState.
/// If deadline is reached or and error occurs, returned task is cancelled.
/// </summary>
public Task WaitForStateChangedAsync(ChannelState lastObservedState, DateTime?deadline = null)
{
GrpcPreconditions.CheckArgument(lastObservedState != ChannelState.Shutdown,
"Shutdown is a terminal state. No further state changes can occur.");
var tcs = new TaskCompletionSource <object>();
var deadlineTimespec = deadline.HasValue ? Timespec.FromDateTime(deadline.Value) : Timespec.InfFuture;
// pass "tcs" as "state" for WatchConnectivityStateHandler.
handle.WatchConnectivityState(lastObservedState, deadlineTimespec, completionQueue, WatchConnectivityStateHandler, tcs);
return(tcs.Task);
}
public void FromDateTime_OutOfTimespecRange()
{
// we can only get overflow in Timespec on 32-bit
if (IntPtr.Size == 4)
{
Assert.AreEqual(Timespec.InfFuture, Timespec.FromDateTime(new DateTime(2040, 1, 1, 0, 0, 0, DateTimeKind.Utc)));
Assert.AreEqual(Timespec.InfPast, Timespec.FromDateTime(new DateTime(1800, 1, 1, 0, 0, 0, DateTimeKind.Utc)));
}
else
{
Console.WriteLine("Test cannot be run on this platform, skipping the test.");
}
}
/// <summary>
/// Returned tasks completes once channel state has become different from
/// given lastObservedState.
/// If deadline is reached or and error occurs, returned task is cancelled.
/// </summary>
public IObservable <bool> WaitForStateChangedAsync(ChannelState lastObservedState, DateTime?deadline = null)
{
GrpcPreconditions.CheckArgument(lastObservedState != ChannelState.Shutdown,
"Shutdown is a terminal state. No further state changes can occur.");
var subject = new AsyncSubject <bool>();
var deadlineTimespec = deadline.HasValue ? Timespec.FromDateTime(deadline.Value) : Timespec.InfFuture;
var handler = new BatchCompletionDelegate((success, ctx) =>
{
subject.OnNext(success);
subject.OnCompleted();
});
handle.WatchConnectivityState(lastObservedState, deadlineTimespec, completionQueue, handler);
return(subject);
}
/// <summary>
/// Returned tasks completes once channel state has become different from
/// given lastObservedState.
/// If deadline is reached or and error occurs, returned task is cancelled.
/// </summary>
public Task WaitForStateChangedAsync(ChannelState lastObservedState, DateTime?deadline = null)
{
Preconditions.CheckArgument(lastObservedState != ChannelState.FatalFailure,
"FatalFailure is a terminal state. No further state changes can occur.");
var tcs = new TaskCompletionSource <object>();
var deadlineTimespec = deadline.HasValue ? Timespec.FromDateTime(deadline.Value) : Timespec.InfFuture;
var handler = new BatchCompletionDelegate((success, ctx) =>
{
if (success)
{
tcs.SetResult(null);
}
else
{
tcs.SetCanceled();
}
});
handle.WatchConnectivityState(lastObservedState, deadlineTimespec, environment.CompletionQueue, environment.CompletionRegistry, handler);
return(tcs.Task);
}
/// <summary>
/// Returned tasks completes once channel state has become different from
/// given lastObservedState (<c>true</c> is returned) or if the wait has timed out (<c>false</c> is returned).
/// </summary>
public Task <bool> TryWaitForStateChangedAsync(ChannelState lastObservedState, DateTime?deadline = null)
{
GrpcPreconditions.CheckArgument(lastObservedState != ChannelState.Shutdown,
"Shutdown is a terminal state. No further state changes can occur.");
var tcs = new TaskCompletionSource <bool>();
var deadlineTimespec = deadline.HasValue ? Timespec.FromDateTime(deadline.Value) : Timespec.InfFuture;
lock (myLock)
{
if (handle.IsClosed)
{
// If channel has been already shutdown and handle was disposed, we would end up with
// an abandoned completion added to the completion registry. Instead, we make sure we fail early.
throw new ObjectDisposedException(nameof(handle), "Channel handle has already been disposed.");
}
else
{
// pass "tcs" as "state" for WatchConnectivityStateHandler.
handle.WatchConnectivityState(lastObservedState, deadlineTimespec, completionQueue, WatchConnectivityStateHandler, tcs);
}
}
return(tcs.Task);
}
public void FromDateTime()
{
Assert.AreEqual(new Timespec(0, 0),
Timespec.FromDateTime(new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc)));
Assert.AreEqual(new Timespec(10, 5000),
Timespec.FromDateTime(new DateTime(1970, 1, 1, 0, 0, 10, DateTimeKind.Utc).AddTicks(50)));
Assert.AreEqual(new Timespec(1437452508, 0),
Timespec.FromDateTime(new DateTime(2015, 7, 21, 4, 21, 48, DateTimeKind.Utc)));
// before epoch
Assert.AreEqual(new Timespec(-5, 1000),
Timespec.FromDateTime(new DateTime(1969, 12, 31, 23, 59, 55, DateTimeKind.Utc).AddTicks(10)));
// infinity
Assert.AreEqual(Timespec.InfFuture, Timespec.FromDateTime(DateTime.MaxValue));
Assert.AreEqual(Timespec.InfPast, Timespec.FromDateTime(DateTime.MinValue));
// illegal inputs
Assert.Throws(typeof(ArgumentException),
() => Timespec.FromDateTime(new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Unspecified)));
}