Re: QGit: Shrink used memory with custom git log format

[Johannes Schindelin <Johannes.Schindelin@gmx.de>]

Hi,

On Tue, 27 Nov 2007, Jan Hudec wrote:

> On Tue, Nov 27, 2007 at 10:48:00 +0000, Johannes Schindelin wrote:
> > On Mon, 26 Nov 2007, Shawn O. Pearce wrote:
> > > [...]
> > > Otherwise I think what you really want here is a libgit that you can
> > > link into your process and that can efficiently inflate an object
> > > on demand for you.  Like the work Luiz was working on this past
> > > summer for GSOC.  Lots of downsides to that current tree though...
> > > like die() kills the GUI...
> > 
> > But then, die() calls die_routine, which you can override.  And C++ has 
> > this funny exception mechanism which just begs to be used here.  The only 
> > thing you need to add is a way to flush all singletons like the object 
> > array.
> 
> Unfortunately, exceptions won't really work. Why? Because to use 
> exceptions, you need to have an exception-safe code. That is the code 
> needs to free any allocated resources when it's aborted by exception. 
> And git code is not exceptions safe. Given the lack of destructors in C, 
> it means registering all resource allocation in some kind of pool, so 
> they can be freed en masse in case of failure. Than you can also use 
> longjmp for die (for C they really behave the same).

Sorry, I just assumed that you can read my mind (or alternatively remember 
what I suggested a few months ago, namely to "override" xmalloc(), 
xcalloc(), xrealloc() and xfree() (probably you need to create the 
latter)).

Ciao,
Dscho