There's no feature to do that in POCO. On Linux, you could read /proc/meminfo. On Windows, you can call GlobalMemoryStatusEx(). On OS X, there's the host_statistics() call described in Mac OS X Internals, but it's only for virtual memory. For other platforms, I don't know.
Well, there's generally no reliable way to find out the amount of free memory (virtual or physical) on virtual memory, multitasking operating systems. The same moment that a certain amount of free memory is reported to your process, another process might use up all that memory. Shared memory is only a small part of the problem here.
I use a library called SIGAR for this. SIGAR stands for System Information Gathering and Reporting. It comes with many language bindings. I build the java one but actually use the C library that comes out of the java build. The java uses the C library which is called via JNI. There is no C++ library but the C interface is ok.
by electic » 08 Sep 2010, 02:11