get_memory_usage

static uint64 get_memory_usage() {
	uint64 result = 0;
	int i = 0;
	bool seenSpace = false;
	char statm[1024];
	FILE *statmFile = fopen("/proc/self/statm", "r");
	fread(statm, 1, 1024, statmFile);
	fclose(statmFile);

	for (i = 0; i < 1024; i++) {
		if (!seenSpace) {
			if (statm[i] == ' ') {
				seenSpace = true;
			}
		}
		else {
			if (statm[i] == ' ') {
				break;
			}
			else {
				result = result * 10 + (statm[i] - '0');
			}
		}
	}

	return result;
}