fn cancel( userdata: ?*anyopaque, future: *std.Io.AnyFuture, result: []u8, result_alignment: Alignment, ) void
fn cancel( userdata: ?*anyopaque, future: *std.Io.AnyFuture, result: []u8, result_alignment: Alignment, ) void { const ev: *Evented = @ptrCast(@alignCast(userdata)); const future_fiber: *Fiber = @ptrCast(@alignCast(future)); future_fiber.requestCancel(ev); await(ev, future, result, result_alignment); }