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NAME
    TR_ADDREQUEST -- Submit a request to wait a period of time.

FUNCTION
    Ask the timer to wait a specified amount of time before
    replying the timerequest.

    The message may be forced to finish early with an
    abortio()/waitio() pair.

TIMER REQUEST
    io_Message      mn_ReplyPort initialized
    io_Device       preset by timer in opendevice
    io_Unit         preset by timer in opendevice
    io_Command      TR_ADDREQUEST
    io_Flags        IOF_QUICK permitted (but ignored)
    tr_time         a timeval structure specifying how long the
                        device will wait before replying

RESULTS
    tr_time         will be zeroed

NOTES
    This function may be called from interrupts.

    Previous to 2.0, the tr_time field was documented as containing
    junk when the timerequest was returned.

SEE ALSO
    timer.device/abortio(),
    timer.device/timedelay(),

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