github.com/lulzWill/go-agent@v2.1.2+incompatible/internal/sysinfo/memtotal_windows.go (about)

     1  package sysinfo
     2  
     3  import (
     4  	"syscall"
     5  	"unsafe"
     6  )
     7  
     8  // PhysicalMemoryBytes returns the total amount of host memory.
     9  func PhysicalMemoryBytes() (uint64, error) {
    10  	// https://msdn.microsoft.com/en-us/library/windows/desktop/cc300158(v=vs.85).aspx
    11  	// http://stackoverflow.com/questions/30743070/query-total-physical-memory-in-windows-with-golang
    12  	mod := syscall.NewLazyDLL("kernel32.dll")
    13  	proc := mod.NewProc("GetPhysicallyInstalledSystemMemory")
    14  	var memkb uint64
    15  
    16  	ret, _, err := proc.Call(uintptr(unsafe.Pointer(&memkb)))
    17  	// return value TRUE(1) succeeds, FAILED(0) fails
    18  	if ret != 1 {
    19  		return 0, err
    20  	}
    21  
    22  	return memkb * 1024, nil
    23  }