Experimental Physics and
Industrial Control System

Geoff Savage <[email protected]> · Tue, 29 Aug 2000 12:56:09 -0500

Hi,

When using  CA puts on our 64-bit alpha machines running Tru64 Unix I am
getting unaligned access faults.  Here's the reason.

In src/ca/access.c issue_ca_array_put are the lines
    case    DBR_LONG:
        *(long *)pdest = htonl (*(dbr_long_t *)pvalue);
        break;

in src/db_db_access.h

typedef epicsInt32      dbr_long_t;

in src/include/epicsTypes.h

typedef int             epicsInt32;

The code is attempting to equate a long with an int.  This works on a 32
bit machine but not a 64 bit machine.

All the native C data types (long, char, ...) in the issue_ca_array_put
routine should be changed to be the epics dbr_xxxx data types for
consistency.

Would someone please correct this in the next release so that I don't
have to keep patching our code.  Are we the only ones using 64-bit
computers?  Has anyone else encoutered this problem?

Thanks

Geoff

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System