I have it working now but I have to say, examples of calling dynalloc() from C
code using text units is a decidedly badly documented interface.
For anyone who attempts this in the future, here is a sample, this subroutine
takes a char * containing the intended ddname like, "DD:LOG000001". It must
remove the "DD:" before calling dynalloc()/dynfree(). The RBX is what allows
the IKJ messages to be printed to the JESYSMSG (which is really handy). Note
that the DUNSPIN text unit is only useful on the dynfree() call and will give
an error (900) if specified on the dynalloc() call. Some of the parameters I
have specified on the dynfree are probably unnecessary but I left them there
for documentation purposes.
By the way this line
ip.__miscitems = &miscitems;
gets a compiler warning for imcompatible pointers. Anyone who can tell me how
to cast this properly I'll be very grateful.
void myDynFree(char *ddname)
{
__dyn_t ip;
__S99rbx_t myrbx;
memcpy(myrbx.__S99EID, "S99RBX", 6);
myrbx.__S99EVER = 0x01;
myrbx.__S99EOPTS = 0x84;
myrbx.__S99ESUBP = 0x00;
myrbx.__S99EKEY = 0x00;
myrbx.__S99EMGSV = 0x00;
myrbx.__S99ENMSG = 0x00;
myrbx.__S99ECPPL = 0;
myrbx.__S99ERES = 0x00;
myrbx.__S99ERCO = 0x00;
myrbx.__S99ERCF = 0x00;
myrbx.__S99EWRC = 0;
myrbx.__S99EMSGP = 0;
myrbx.__S99EERR = (short)0;
myrbx.__S99EINFO = (short)0;
int textUnitSpin1 = 0x80130001; /* DUNSPIN text unit*/
int textUnitSpin2 = 0x00018000;
int textUnitUnalc = 0x00070000; /* DUNUNALC text unit*/
int miscitems[2];
miscitems[0] = (int)&textUnitUnalc;
miscitems[0]= miscitems[0] | 0x80000000;
dyninit(&ip);
ip.__rbx = &myrbx;
ip.__sysout = 'H';
ip.__ddname = ddname+3; /* passed in DD name without the DD: prefix
*/
ip.__misc_flags = __RELEASE & __CONTIG & __CLOSE; /* RLSE,CONTIG,
CLOSE) */
ip.__dsorg = __DSORG_PO; /* DCB=(DSORG=PO, */
ip.__recfm = _F_ + _B_; /* RECFM=FB, */
ip.__lrecl = 255; /* LRECL=255, */
ip.__blksize = 25500; /* BLKSIZE=25500) */
ip.__miscitems = &miscitems;
dynfree(&ip);
}
Janet
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