get_total_virtual_memory()

static xtd::size xtd::memory_information::get_total_virtual_memory ( )

staticnoexcept

Gets the the total virtual memory in bytes.

Returns

The total virtual memory value.

Examples

The following example shows how to retrieve some information about the memory.

#include <xtd/console>
#include <xtd/memory_information>
 
using namespace xtd;
 
auto main() -> int {
  console::write_line("Physical memory");
  console::write_line("  total = {,12} ({,3} GB)", memory_information::get_total_physical_memory(), memory_information::get_total_physical_memory() / 1024 / 1024 / 1024);
  console::write_line("  used  = {,12} ({,3} GB)", memory_information::get_used_physical_memory(), memory_information::get_used_physical_memory() / 1024 / 1024 / 1024);
  console::write_line("  free  = {,12} ({,3} GB)", memory_information::get_free_physical_memory(), memory_information::get_free_physical_memory() / 1024 / 1024 / 1024);
  console::write_line();
  
  console::write_line("Virtual memory");
  console::write_line("  total = {,12} ({,3} GB)", memory_information::get_total_virtual_memory(), memory_information::get_total_virtual_memory() / 1024 / 1024 / 1024);
  console::write_line("  used  = {,12} ({,3} GB)", memory_information::get_used_virtual_memory(), memory_information::get_used_virtual_memory() / 1024 / 1024 / 1024);
  console::write_line("  free  = {,12} ({,3} GB)", memory_information::get_free_virtual_memory(), memory_information::get_free_virtual_memory() / 1024 / 1024 / 1024);
  console::write_line();
  
  console::write_line("Process memory");
  console::write_line("  total = {,12} ({,3} GB)", memory_information::get_total_process_memory(), memory_information::get_total_process_memory() / 1024 / 1024 / 1024);
  console::write_line("  used  = {,12} ({,3} MB)", memory_information::get_used_process_memory(), memory_information::get_used_process_memory() / 1024 / 1024);
  console::write_line("  free  = {,12} ({,3} GB)", memory_information::get_free_process_memory(), memory_information::get_free_process_memory() / 1024 / 1024 / 1024);
}
 
// This code can produce the following output :
//
// Physical memory
//   total =  34359738368 ( 32 GB)
//   used  =  18914050048 ( 17 GB)
//   free  =  15445688320 ( 14 GB)
//
// Virtual memory
//   total = 600992124928 (559 GB)
//   used  = 420945264640 (392 GB)
//   free  = 180046860288 (167 GB)
//
// Process memory
//   total = 180046860288 (167 GB)
//   used  =     40550400 ( 38 MB)
//   free  = 180006309888 (167 GB)

Remarks

Each OS has its own way of managing and allocating virtual memory.

It is possible that the OS has no virtual memory, in which case the method will return 0.