[fpc-pascal] question about FPC heap and threading

Michael Van Canneyt michael at freepascal.org
Thu Aug 12 23:13:29 CEST 2010

On Thu, 12 Aug 2010, Mark Morgan Lloyd wrote:

> Seth Grover wrote:
>> These are very simple questions, but I just want to make sure a few of
>> my assumptions are correct:
>> 1. The default FPC heap manager uses one heap per thread, right? I am
>> basing this assumption off of things I have read in various threads on
>> this and other mailing lists since around 2.2.x-ish. Looking at
>> heap.inc I see that the "freelists" variable is a threadvar, which
>> indicates to me that each thread has its own heap.
> If that's the case and also applies to Lazarus it's going to save me a lot of 
> effort, so I'd be interested to see this confirmed as well.

FPC uses one heap per thread. If lazarus doesn't install it's own heap manager, 
it is true for Lazarus as well.


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