[erlang-bugs] win32sysinfo.c doesn't understand DWORDLONG is unsigned and long

Matthew Sackman <>
Tue Feb 2 15:29:42 CET 2010

Hi Björn-Egil,

On Thu, Jan 28, 2010 at 06:59:14PM +0100, Björn-Egil Dahlberg wrote:
> I will have a look at this but I think you are correct.
> %I64d seems to be the wrong thing here.

Eeek, my apologies, I am totally wrong. I hadn't realised that Windows
has its own version of format specifiers for printf, and thus I64 means
exactly "unsigned 64-bit int" which is precisely what's wanted.


And indeed release notes for R13B show that this fixed (the bug really
did exist before R13B) in os_mon 2.2.1:

OTP-7944  An error in memsup could cause os_mon to report erroneous
	      memory values on windows for ranges of memory between 2GB and
	      4GB. This have now been fixed.

Sorry for wasting your time.


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