[fpc-pascal] Does ReallocMem(p,0) always set p to nil?
vsnijders at quicknet.nl
Mon May 7 09:13:59 CEST 2007
Vincent Snijders schreef:
> Consider this piece of code:
> p: pointer;
> p := getmem(100);
> p := nil;
> Do I need to do p:=nil, if I want to be sure that p contains nil?
> I saw that both system.SysReAllocMem and cmem.CReAllocMem do this, is
> size=0, but the docs at
> http://lazarus-ccr.sourceforge.net/docs/rtl/system/reallocmem.html don't
> mention this, so I don't know if I can be trust that is the case for
> always for all memory managers.
Tough question apparently. Let's try to word it differently.
After reallocmem(p,0) I observed that p is always nil. Is this an implementation
detail (subject to change) or part of the specification of reallocmem?
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