jemalloc win32 port

[Yoni Londner]

Hi,

I am working with Firefox version of jemalloc (x86 and x64), And it is 
working as expected.
But, I wanted to use the original version of jemalloc, mainly because 
there are profiling features missing
in Firefox's version, and because I wanted to be able to get bug fixes 
and new features from TRUNK.
So, I Ported jemalloc to win32 (using msvc10 on win7 x86)
I did not completed all the work (yet), but i have a working version.
These are the changes I made (patch attached):

  * prn.h - apparently it is not possible to create a file named prn.xxx
    on windows. I changed the name of the file to _prn.h
  * atomic.h - added win32 intrinsic implementation
  * compat_win32.h - all sort of definitions needed for win32 (most of
    them from Firefox version + pthread handling - not completed yet)
  * compat_win32.c - need to complete here win32_setspecific and
    win32_setspecific by using ".CRT$XXX"
  * arena.c, ctl.h, ctl.c, ckh.c - C99 compatibility
  * hunk_mmap.c
  * jemalloc_defs.h, jemalloc.h, jemalloc_internal.h - I don't have
    configure, so I copied jemalloc_internal.h.in and hand edited it.
  * mutex.h - win32 mutex (from Firefox version)
  * chunk_mmap.c -pages_map/pages_unmap from Firefox version
  * jemalloc.c - system settings (ncpus etc) + added _crtheap
  * jemalloc.c - win32 crt specific functions (msize, calloc_impl,
    _recalloc, get_heap_handle...)

since jemalloc does not patch malloc and friends, I need to use a 
striped version of msvcrt (removed malloc/free etc).
I have a scripts to do this.

I hope that after the work is done, you can commit this patch to the git.
Any comments/suggestions/help are welcome

Yoni.




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