public static async Task DoAsyncWithMaxSimultaneous(IEnumerable <Func <Task> > tasks, int maxSimultaneous)
{
Debug.Assert(maxSimultaneous >= 1, "should allow at least one task at a time");
List <Task> currTasks = new List <Task>();
foreach (var task in tasks)
{
// Wait until simultaneous tasks count drops below limit.
await WaitingUntillTasksCountLessThan(maxSimultaneous);
// Start next task.
currTasks.Add(task());
}
// Wait until all tasks complete.
await WaitingUntillTasksCountLessThan(1);
async Task WaitingUntillTasksCountLessThan(int count)
{
while (currTasks.Count >= count)
{
await Frame.one;
currTasks.RemoveAll(currTask => currTask.IsCompleted);
}
}
}
public static void WriteToStream <T>(this List <T> data, BinaryWriter stream) where T : ISerializable, new()
{
Debug.Assert(data.Count > UInt16.MaxValue, "writing stream failed");
ushort size = (ushort)data.Count;
stream.Write(size);
data.Capacity = size;
for (int q = 0; q < size; q++)
{
stream.Write(data[q]);
}
}