#ifdef __linux__
long getRSS()
{
	int pid;
	char comm[512];
	char state;
	int ppid, pgrp, session, tty_nr, tpgid, flags;
	long minflt, cminflt, majflt, cmajflt, utime, stime, cutime, cstime, priority, nice, num_threads, itrealvalue;
	long long starttime;
	long vsize;
	long rss = 0;

	FILE* fp = fopen("/proc/self/stat", "r");

	if (fp) {
		fscanf(
				fp,
				"%d %s %c %d %d %d %d %d %u %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld %llu %lu %ld",
				&pid, comm, &state, &ppid, &pgrp, &session, &tty_nr, &tpgid, &flags,
				&minflt, &cminflt, &majflt, &cmajflt, &utime, &stime, &cutime, &cstime,
				&priority, &nice, &num_threads, &itrealvalue, &starttime, &vsize, &rss);


		rss = rss * sysconf(_SC_PAGE_SIZE)/1024;	//in kb
		fclose(fp);
	}

	return rss;
}
#endif