Daniel Stutzbach wrote: > On Tue, Aug 31, 2010 at 4:54 AM, M.-A. Lemburg <m...@egenix.com> wrote: > >> Is it possible to have multiple versions of the lib C loaded >> on Windows ? >> > > Yes, and it's a pretty common situation. The fopen() that I call within a > DLL may not be the same fopen() called by another DLL. When writing a DLL > for Windows, the API must be designed with the assumption that anything > returned by the C library cannot be passed a different C library. For > example, suppose I a expose a function in my DLL that allocates some memory, > populates it with useful information, and returns a pointer. I must also > supply a function to free the memory. I cannot ask the caller to simply > call free(), because their free() may not be using the same heap as my > malloc().
But isn't exactly that a major problem for Python ? An extension written for a different MS CRT version would not be able to safely free a buffer allocated by the Python DLL. > Likewise, a FILE * isn't safe to pass around, unless I can guarantee that > the application really is one big happy family compiled against the same > version of the C library. According to the MS document I found this also applies to the OS environment and handles. Taking all these things together makes it sound like there's a rather small chance of actually getting PEP 384 working across Windows compiler upgrades. Then again, I haven't heard of many people actually running into those possible issues. -- Marc-Andre Lemburg eGenix.com Professional Python Services directly from the Source (#1, Aug 27 2010) >>> Python/Zope Consulting and Support ... http://www.egenix.com/ >>> mxODBC.Zope.Database.Adapter ... http://zope.egenix.com/ >>> mxODBC, mxDateTime, mxTextTools ... http://python.egenix.com/ ________________________________________________________________________ 2010-08-19: Released mxODBC 3.1.0 http://python.egenix.com/ 2010-09-15: DZUG Tagung, Dresden, Germany 18 days to go ::: Try our new mxODBC.Connect Python Database Interface for free ! :::: eGenix.com Software, Skills and Services GmbH Pastor-Loeh-Str.48 D-40764 Langenfeld, Germany. CEO Dipl.-Math. Marc-Andre Lemburg Registered at Amtsgericht Duesseldorf: HRB 46611 http://www.egenix.com/company/contact/ _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
