How to get current CPU and RAM usage in C++?

Question

is it possible, in C++, to get the current RAM and CPU usage? Is there a platform-indepentent function call?

Answer 1

On Linux, this will use /proc/self/status . More work is required to turn this into a number. I find this useful as it is though, just to print the memory usage directly to the screen as a string.

static string memory_usage() {
        ostringstream mem;
        PP("hi");
        ifstream proc("/proc/self/status");
        string s;
        while(getline(proc, s), !proc.fail()) {
                if(s.substr(0, 6) == "VmSize") {
                        mem << s;
                        return mem.str();
                }
        }
        return mem.str();
}