total_physical_memory
uint64 total_physical_memory();
uint64 initialPhysicalMemory = total_physical_memory();
+= initialPhysicalMemory - total_physical_memory();
uint64_t initialPhysicalMemory = total_physical_memory();
+= initialPhysicalMemory - total_physical_memory();
uint64_t initialPhysicalMemory = total_physical_memory();
+= initialPhysicalMemory - total_physical_memory();