Charles, at least that's my understanding reading the doc.
https://www.ibm.com/docs/en/zos/2.4.0?topic=functions-malloc24-allocate-24-bit-storage
"Related information
..See the topic about using the system programming C facilities in z/OS
XL C/C++ Programming Guide. .."
https://www.ibm.com/docs/en/zos/2.4.0?topic=environments-using-system-programming-c-facilities
mario
On 7/15/21 8:54 PM, Charles Mills wrote:
That would certainly account for it! <g> 100% of my experience is full LE C++.
But are you sure? I don't see any such restriction in the library reference and I know
the LE diagnostic storage report shows a below-the-line heap. The library manual says it
is supported for C++, which to me would seem to imply "full" support.
Charles
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of Mario Bezzi
Sent: Thursday, July 15, 2021 11:23 AM
To: [email protected]
Subject: Re: Mixing C/C++ with LE-conforming IBM HLASM
As far as I know __malloc24 is only available when running in a System
programming C environment, which is an early incarnation of METAL-C and
does not use LE runtime services. Maybe this is the reason?
mario
On 7/15/21 12:30 AM, Charles Mills wrote:
Correction: you can't use malloc or new to get the area -- they will return
31-bit storage. You might use __malloc24() which does the obvious. Looking at
my code, I called out to a GETMAIN LOC=BELOW written in assembler. Can't tell
you why I did that rather than use __malloc24().
Charles
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of Charles Mills
Sent: Wednesday, July 14, 2021 9:53 AM
To: [email protected]
Subject: Re: Mixing C/C++ with LE-conforming IBM HLASM
I played with the approach you suggest and abandoned the effort. Too hard, and
too likely to break.
What I did do that worked was code a number of atomic assembler routines that
could be passed a DCB that was kept in an area that I malloc or new in C or
C++. One of those routines was
int MAKEDCB(void *DCBarea, const int DCBareaLen, const char *DCBtype,
const char DDname[8]);
It constructs a DCB in the C/C++ allocated area by moving in a model. DCBtype is, e.g.,
"BPAM". Other routines are, e.g.,
int OPNDCBIN(void *DCBarea); // OPEN a DCB for input
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