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EnigmA Amiga Run 1997 May
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EnigmA AMIGA RUN 18 (1997)(G.R. Edizioni)(IT)[!][issue 1997-05][EAR-CD II].iso
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waitio.c
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1997-01-09
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/*
(C) 1995-96 AROS - The Amiga Replacement OS
$Id: waitio.c,v 1.7 1997/01/01 03:46:18 ldp Exp $
$Log: waitio.c,v $
Revision 1.7 1997/01/01 03:46:18 ldp
Committed Amiga native (support) code
Changed clib to proto
Revision 1.6 1996/12/10 13:51:55 aros
Moved all #include's in the first column so makedepend can see it.
Revision 1.5 1996/10/24 15:50:59 aros
Use the official AROS macros over the __AROS versions.
Revision 1.4 1996/08/13 13:56:09 digulla
Replaced AROS_LA by AROS_LHA
Replaced some AROS_LH*I by AROS_LH*
Sorted and added includes
Revision 1.3 1996/08/01 17:41:22 digulla
Added standard header for all files
Desc:
Lang: english
*/
#include <exec/execbase.h>
#include <exec/io.h>
#include <aros/libcall.h>
#include <proto/exec.h>
/*****************************************************************************
NAME */
AROS_LH1(BYTE, WaitIO,
/* SYNOPSIS */
AROS_LHA(struct IORequest *, iORequest, A1),
/* LOCATION */
struct ExecBase *, SysBase, 79, Exec)
/* FUNCTION
Waits until the I/O request is completed and removes it from the
reply port. If the message is already done when calling this function
it doesn't wait but just remove the message.
INPUTS
iORequest - Pointer to iorequest structure.
RESULT
Error state of I/O request.
NOTES
EXAMPLE
BUGS
SEE ALSO
OpenDevice(), CloseDevice(), DoIO(), SendIO(), AbortIO(), CheckIO()
INTERNALS
HISTORY
******************************************************************************/
{
AROS_LIBFUNC_INIT
/*
The I/O request is still in use if it wasn't done quick
and isn't yet replied (ln_Type==NT_MESSAGE).
If it is still in use wait until it is complete.
Note the the port may be used for other things as well - so
don't just wait but repeat the check.
*/
while(!(iORequest->io_Flags&IOF_QUICK)&&
iORequest->io_Message.mn_Node.ln_Type==NT_MESSAGE)
/*
Wait at the reply port. Don't use WaitPort() - there may
already be other messages waiting at it.
*/
Wait(1<<iORequest->io_Message.mn_ReplyPort->mp_SigBit);
/*
If ln_Type is NT_REPLYMSG the I/O request must be removed from
the replyport's waiting queue.
*/
if(iORequest->io_Message.mn_Node.ln_Type==NT_REPLYMSG)
{
/* Arbitrate for the message queue. */
Disable();
/* Remove the message */
Remove(&iORequest->io_Message.mn_Node);
Enable();
}
/* All done. Get returncode. */
return iORequest->io_Error;
AROS_LIBFUNC_EXIT
} /* WaitIO */