/// <summary>
/// Wait the specified deadline and data.
/// </summary>
/// <returns>
/// <list type="bullet">
/// <item>
/// <term>Ok</term>
/// <description>
/// on successful packet dequeuing.
/// </description>
/// </item>
/// <item>
/// <term>ErrBadHandle</term>
/// <description>
/// handle is not a valid handle.
/// </description>
/// </item>
/// <item>
/// <term>ErrInvalidArgs</term>
/// <description>
/// packet isn't a valid pointer
/// </description>
/// </item>
/// <item>
/// <term>ErrAccessDenied</term>
/// <description>
/// handle does not have ZX_RIGHT_READ and may not be waited upon.
/// </description>
/// </item>
/// <item>
/// <term>ErrTimedOut</term>
/// <description>
/// deadline passed and no packet was available.
/// </description>
/// </item>
/// </list>
/// </returns>
/// <param name="deadline">Maximum amount of time to wait for a packet to arrive, if the timeout passes, the ZxStatus.TimedOut value will be returned.</param>
/// <param name="data">The data that was retrieved from the port's queue.</param>
/// <remarks>
/// <para>
/// Wait is a blocking syscall which causes the caller to wait until at least one packet is available.
/// </para>
///
/// <para>
/// Upon return, if successful packet will contain the earliest (in FIFO order) available packet data.
/// </para>
///
/// <para>
/// The deadline indicates when to stop waiting for a packet (with respect
/// to ZxClock.Monotonic) and will be automatically adjusted according to
/// the job's timer slack policy. If no packet has arrived by the
/// deadline, ZxStatus.ErrTimedOut is returned. The value ZxTime.Infinite
/// will result in waiting forever. A value in the past will result in an
/// immediate timeout, unless a packet is already available for reading.
/// </para>
///
/// <para>
/// Unlike Object.WaitOne and Object.WaitMany only one waiting thread is
/// released (per available packet) which makes ports amenable to be
/// serviced by thread pools.
/// </para>
///
/// <para>
/// There are two classes of packets: packets queued by userspace with
/// Queue() and packets queued by the kernel when objects a port
/// is registered with change state. In both cases the packet is always of
/// type ZxPortPacket
/// </para>
///
/// <para>
/// In the case of packets generated via Queue(), type will be set
/// to ZxPortPacketType.User, and the caller of Queue() controls all
/// other values in the ZxPortPacket structure. Access to the packet
/// data is provided by the user member, given by the ZxPacketUser.
/// </para>
///
/// <para>
/// For packets generated by the kernel, type can be one of the following values:
/// </para>
/// <list type="bullet">
/// <item>
/// <term>ZxPortPacketType.SignalOne, ZxPortPacketType.SignalRep</term>
/// <description>
/// generated by objects registered via zx_object_wait_async()
/// </description>
/// </item>
/// <item>
/// <term>PktTypeException</term>
/// <description>
/// generated by objects registered via zx_task_bind_exception_port()
/// </description>
/// </item>
/// <item>
/// <term>ZxPortPacketType.GuestBell, ZxPortPacketType.GuestMem, ZxPortPacketType.GuestVcpu, ZxPortPacketType.GuestIO</term>
/// <description>
/// generated by objects registered via zx_guest_set_trap().
/// </description>
/// </item>
/// <item>
/// <term>ZxPortPacketType.Interrupt</term>
/// <description>
/// generated by objects registered via zx_interrupt_bind().
/// </description>
/// </item>
/// </list>
/// <para>All kernel queued packets will have status set to ZxStatus.Ok and key set to the value provided to the registration syscall.
/// For details on how to interpret the union, see the corresponding registration syscall.
/// </para>
/// </remarks>
public ZxStatus Wait(ZxTime deadline, out ZxPortPacket data)
{
return(zx_port_wait((uint)handle, (ulong)deadline.NanoSeconds, out data));
}
/// <summary>
/// Queue a packet to an port
/// </summary>
/// <returns>
/// /// <list type="bullet">
/// <item>
/// <term>Ok</term>
/// <description>
/// on successful queue of a packet.
/// </description>
/// </item>
/// <item>
/// <term>ErrBadHandle</term>
/// <description>
/// handle isn't a valid handle
/// </description>
/// </item>
/// <item>
/// <term>ErrInvalidArgs</term>
/// <description>
/// packet is an invalid pointer.
/// </description>
/// </item>
/// <item>
/// <term>ErrWrongType</term>
/// <description>
/// handle is not a port handle.
/// </description>
/// </item>
/// <item>
/// <term>ErrAccessDenied</term>
/// <description>
/// handle does not have ZX_RIGHT_WRITE.
/// </description>
/// </item>
/// <item>
/// <term>ErrShouldWait</term>
/// <description>
/// the port has too many pending packets. Once a thread has drained some packets a new zx_port_queue() call will likely succeed.
/// </description>
/// </item>
/// </list>
/// </returns>
/// <param name="packet">Packet to queue into the port.</param>
/// <remarks>The queue is drained by calling the Wait method.</remarks>
public ZxStatus Queue(ref ZxPortPacket packet)
{
return(zx_port_queue((uint)handle, ref packet));
}
extern static ZxStatus zx_port_wait(uint handle, ulong deadline, out ZxPortPacket data);
extern static ZxStatus zx_port_queue(uint handle, ref ZxPortPacket data);