Re: free() vs dealloc

[Scott Klement <rpg400-l@xxxxxxxxxxxxxxxx>]

Brad,

The malloc() function will always allocate in single-level store, 
likewise _C_TS_Malloc() will always allocate in teraspace.  It does not 
matter which storage model you compile your RPG with.  You do not need 
to compile with the teraspace storage model to use teraspace allocations 
from _C_TS_malloc().

If you were coding in C, there is a preprocessor directive that will map 
malloc() to _C_TS_malloc() automatically if you specify teraspace.  But, 
that's not the case in RPG.

I believe that if you use a teraspace storage model that the RPG 
%alloc/dealloc will use teraspace as well.  But, then your whole program 
model is teraspace which can cause issues with callers also having to be 
teraspace.  Since I only needed teraspace memory for things that I 
specifically allocate, there wasn't any need for that in yAJL.

-SK



On 6/6/2017 2:07 PM, Bradley Stone wrote:
> I am just curious if there is much or any difference in using
> _C_TS_free() or free vs the dealloc RPG opcode.
>
> I was looking through Scotts YAJL parser setting it up for teraspace
> and noticed Scott used _C_TS_malloc64() or malloc() (depending on if
> TS is being used) and frees that space using the RPG opcode dealloc
> instead of _C_TS_free() or free().
>
> It wouldn't appear to be much difference, but I'm sure there is.
>
> Thanks!
>
> Bradley V. Stone
> www.bvstools.com
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