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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <mach.h>
include <knet.h>
include "m70.h"
# ZWTM70 -- Wait for i/o completion and return the number of bytes read or
# written or ERR. Repetitive calls return the same value.
procedure zwtm70 (chan, status)
int chan # FCB pointer for device
int status # nbytes transferred or ERR
pointer fcb
short bfnum, bufcnt, ier
begin
fcb = chan
if (FCB_KCHAN(fcb) == NULL) {
switch (FCB_STATUS(fcb)) {
case ERR:
status = ERR
case IIS_INACTIVE:
status = FCB_NBYTES(fcb)
default:
bfcnt = -1 # m70wt is a nop if we don't do this
bfnum = FCB_EFN(fcb)
call m70wt (Mems[fcb], bfnum, bfcnt, FCB_IOSB(fcb,1), ier)
if (ier != 0)
status = ERR
else
status = FCB_NBYTES(fcb)
FCB_STATUS(fcb) = IIS_INACTIVE
}
} else
call zawtbf (FCB_KCHAN(fcb), status)
end
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