Experimental Physics and
Industrial Control System

wantianmin <[email protected]> · Thu, 02 Dec 2010 10:55:28 +0800

Hi ,all:
When I use aSubRecord record to do some process, It was found that write
operation is not being done until myAsubProcess() finish.Is there some
way to overcome it?
here is a description of my situation:
db:
record(aSub,"asub")
{
field(INAM,"myAsubInit")
field(SNAM,"myAsubProcess")
field(FTA,"DOUBLE")
field(NOA,"1")
field(INPA,"test4 CA")
field(FTVA,"DOUBLE")
field(NOVA,"1")
field(OUTA,"test1 CA")
field(FTVB,"DOUBLE")
field(NOVB,"1")
field(OUTB,"test2 CA ")
}
dbSubExample.cpp:
static long myAsubProcess(aSubRecord *precord)
{
if (mySubDebug)
printf("Record %s called myAsubProcess(%p)\n",
precord->name, (void*) precord);
printf(" begin process\n");
double* p1=(double*)precord->vala;
p1[0]=20;
printf(" write vala 1 to 20 complete....\n");

double* p2=(double*)precord->a;
printf(" read from a :%lf\n complete",p2);

printf(" end process\n");
return 0;
}

I found that When I doing dbpf asub.PROC 1 in iocshell,
the first output value (test1) is not changed until the process finished.
but in some application ,I need to write some pv and read it again to
decide what is need to do next.
Is there some suggestions?
Thanks a lot
Best Regards
wantianmin
SSRF

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System