Detecting low memory

[steg90]

Hi,

Any good strategies for detecting low memory? O/S is Win32.

I'd like to emit a signal when memory gets too low and warn the user of this.

Regards,
Steve

[wysota]

QTimer or timerEvent seem to be good ways to start with...

[fullmetalcoder]

QTimer or timerEvent seem to be good ways to start with...

If I understand well he meant "detecting" before reporting... I'm afraid there's no "simple & smooth" (c) way to do that so you'll have to mess with low level system calls.

Under Unix however there is a not-that-hard way to deal with this :
$ cat /proc/meminfo
Of course you got to parse the output but that's quite a synch...

If you don't want to rely on subprocesses Qt can make your way easier (though I can certify that they don't use subprocesses under the hood to achieve that) because QFile can reads the content of such special files (only using readAll() if I remember well but that's not a too big limitations is it?)

[wysota]

I'm not quite sure what you mean by "detect", but there are surely function calls for each platform that return amount of virtual/physical memory available.