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DoIO -- perform an I/O command and wait for completion
error = DoIO(iORequest)
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BYTE DoIO(struct IORequest *);
This function requests a device driver to perform the I/O command
specified in the I/O request. This function will always wait until
the I/O request is fully complete.
DoIO() handles all the details, including Quick I/O, waiting for
the request, and removing the reply message, etc..
IMPLEMENTATION
This function first tries to complete the IO via the "Quick I/O"
mechanism. The io_Flags field is always set to IOF_QUICK (0x01)
before the internal device call.
The LN_TYPE field is used internally to flag completion. Active
requests have type NT_MESSAGE. Requests that have been replied
have type NT_REPLYMSG. It is illegal to start IO using a
still active IORequest, or a request with type NT_REPLYMSG.
iORequest - pointer to an IORequest initialized by OpenDevice()
error - a sign-extended copy of the io_Error field of the
IORequest. Most device commands require that the error
return be checked.
SendIO(), CheckIO(), WaitIO(), AbortIO(), amiga.lib/BeginIO()
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