[Lazarus] Library, Threads and Gui
nc-gaertnma at netcologne.de
Tue Jun 5 09:47:02 CEST 2012
On Tue, 05 Jun 2012 09:33:53 +0200
Michael Schnell <mschnell at lumino.de> wrote:
> On 06/05/2012 08:29 AM, Mattias Gaertner wrote:
> > yes it is relevant. If you have two memory managers you can not
> > exchange strings and classes.
> Is cmem "the way to go" to unify the memory managers of a dynamic
> library and the calling application ? (There seem more advanced free
> alternatives written for Delphi, that might be usable with FPC.)
> Will just "using" cmem both in the main program and in the library
> automatically unify the memory managers ?
Under Linux: yes. I guess BSD, OS X
too. The Delphi alternatives work only on MS Windows.
> http://wiki.freepascal.org/Multithreaded_Application_Tutorial states:
> cmem, // the c memory manager is on some systems much faster for multi-threading
> You can not use the -gh switch with the/cmem/ unit. The -gh switch uses the heaptrc unit,
> which extends the heap manager. Therefore the*heaptrc* unit must be used*after* the*cmem* unit.
> Should the FPC memory manager not be more optimized for FPC code then cmem ?
Yes, it normally is.
It was slower with multithreading on some systems. The FPC heap manager
was improved for OS X. Do some tests to find out which one is better for
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