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Autodocs
 Devices:
 audio.device
  ADCMD_ALLOCATE
  ADCMD_FINISH
  ADCMD_FREE
  ADCMD_LOCK
  ADCMD_PERVOL
  ADCMD_SETPREC
  ADCMD_WAITCYCLE
  AbortIO
  BeginIO
  CMD_CLEAR
  CMD_FLUSH
  CMD_READ
  CMD_RESET
  CMD_START
  CMD_STOP
  CMD_UPDATE
  CMD_WRITE
  CloseDevice
  Expunge
  OpenDevice
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GuruMeditation
Docs » Autodocs » audio.device » CMD_UPDATE

NAME

       CMD_UPDATE -- force dirty buffers out

FUNCTION

       CMD_UPDATE is a standard command for multiple audio channels.  For
each selected channel (io_Unit), if the allocation key (ioa_AllocKey)
is correct, CMD_UPDATE does nothing; otherwise, CMD_UPDATE returns an
error (ADIOERR_NOALLOCATION). CMD_UPDATE is synchronous and only
replies (mn_ReplyPort) if the quick flag (IOF_QUICK) is clear.

INPUTS

       mn_ReplyPort- pointer to message port that receives I/O request after
if the quick flag (IOF_QUICK) is clear
io_Device - pointer to device node, must be set by (or copied from
I/O block set by) OpenDevice function
io_Unit - bit map of channels to update (bits 0 thru 3 correspond
to channels 0 thru 3)
io_Command - command number for CMD_UPDATE
io_Flags - flags, must be cleared if not used:
IOF_QUICK - (CLEAR) reply I/O request
ioa_AllocKey- allocation key, must be set by (or copied from I/O block
set by) OpenDevice function or ADCMD_ALLOCATE command

RESULT

       io_Unit     - bit map of channels successfully updated (bits 0 thru 3
correspond to channels 0 thru 3)
io_Error - error number:
0 - no error
ADIOERR_NOALLOCATION - allocation key (ioa_AllocKey)
does not match key for channel

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