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Date:	Thu, 27 Feb 2003 08:40:04 -0800
To:	cygwin AT cygwin DOT com
From:	Randall R Schulz <rrschulz AT cris DOT com>
Subject:	Re: mem allocation / heap_chunk
In-Reply-To:	<3E5E3A55.2050008@inf.ethz.ch>
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Fabrice,

It would seem that the answer is right there on the page you 
referenced. You can script a change to that registry entry via the 
Cygwin regtool script. You can do this in an install or post-install 
script or upon each invocation of your application, providing it's 
invoked via a script.

The man page for regtool includes sufficient detail to enable you to 
incorporate this sort of functionality in your software.

I recommend that you consider carefully the logic you use to alter the 
"heap_chunk_in_mb" key so that you don't undermine an existing 
customization already applied by your end user.

Randall Schulz


At 08:18 2003-02-27, Fabrice Marchal wrote:
>Hi,
>I have come accross the 384 Mb limit for allocating memory in cygwin.
>(e.g.  char* pnt = new char[ long size = 500*1024*1024 ]; will not work )
>
>I have been able to modify this using the workaround documented in the
>Users Guide (http://cygwin.com/cygwin-ug-net/setup-maxmem.html)
>
>I would like to know if there is a way to do the same within code so 
>that end-users
>who receive a cygwin-compiled code do not require to go into the hassle of
>using regtool or regedit
>
>Is that feasible?
>
>Thanks
>fm


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