DOS Extender/Heap Manager

[Andreas Kaiser]

In your msg to All, dated <16 Nov 90 19:00>, it said:

 WB> Zortech C/C++ has an additional pointer type, called a __handle
 WB> pointer, which is used like a conventional pointer, but instead points
 WB> into data that is in EMS. The swapping of EMS pages in and out is
 WB> handled transparently.

Beautiful feature. Except that handle pointers with static scope do not reserve storage... It took an aweful lot of time to find this bug experimenting with a MicroEmacs version using handle pointers for text storage.

BTW: There is a problem with these handle pointers: It should not be possible to convert a normal far pointer to a handle pointer. It's just too easy to write silly code like:

char __handle *p;
...
p = strchr(p, '.');

where p looses it's virtual memory property.

                Andreas

reas

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:::::::::::::::::::: uucp: kaiser at ananke.stgt.sub.org
:: Andreas Kaiser :: fido: 2:509/5.2512 & 2:507/18.7206
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