[fpc-pascal] methods of an object to create others objects

Michael Van Canneyt michael at freepascal.org
Wed Jul 7 21:28:40 CEST 2010

On Wed, 7 Jul 2010, Andrew Brunner wrote:

>> Well... I think CGI gateway is a good way. If the real app (FCGI) have
>> troubles, I can change the URL that the CGI (gateway) uses to call the
>> real app and to point to another app (in other server, e.g.). What do
>> you think about it?
> I think it would be worth discussing what can be done or at least
> start thinking about getting the memory manager not to blow-out any
> more.  I really don't want to re-start server software just because a
> few apps (embedded in the service application) crash.
> Has anyone with experience with developing the memory manager been
> following?  What about a separate discussion on application
> stabilization after an unhanded exception?  That would be a necessity
> for at least my platform which is compiled with FPC - and certainly
> FCLWeb generated back-end apps too.

Fcl-web ? Why ? 
1. All fcl-web backends handle exceptions that occur in the web-request handler.
2. There is never an excuse for not freeing allocated resources, also in cases of
    exceptions. Such leaks must be identified, and plugged. Not worked around.
    FPC offers the heaptrace unit exactly for this.

There is no way to allocate, use (and subsequently automatically free)
memory associated with a web-request. One reason is simply string and 
class instance management, both of which inherently rely on a global 
heap manager without concept of 'context'.


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