I want my Memory back ;-)

["Jérôme M. Berger"]

ABothe wrote:
> So there isn't any other method than calling C's free(); or malloc
> (); ?
	Note that there is no guarantee that C's malloc/free will return
the memory to the OS either (*). The only way to be sure that the
memory will be returned is to call mmap/munmap (or their equivalent
on whatever OS you're using).

(*) Most malloc implementations allocate large chunks of memory
using mmap, which can return the memory to the OS, but they allocate
small chunks with sbrk, which can't. As proof, see the attached C
code which prints:

At the beginning:
VmSize:	    3872 kB
After allocating the memory:
VmSize:	   36608 kB
After releasing the memory:
VmSize:	   36608 kB


		Jerome
-- 
mailto:jeberger at free.fr
http://jeberger.free.fr
Jabber: jeberger at jabber.fr
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