github.com/demonoid81/moby@v0.0.0-20200517203328-62dd8e17c460/pkg/system/meminfo_windows.go (about) 1 package system // import "github.com/demonoid81/moby/pkg/system" 2 3 import ( 4 "unsafe" 5 6 "golang.org/x/sys/windows" 7 ) 8 9 var ( 10 modkernel32 = windows.NewLazySystemDLL("kernel32.dll") 11 12 procGlobalMemoryStatusEx = modkernel32.NewProc("GlobalMemoryStatusEx") 13 ) 14 15 // https://msdn.microsoft.com/en-us/library/windows/desktop/aa366589(v=vs.85).aspx 16 // https://msdn.microsoft.com/en-us/library/windows/desktop/aa366770(v=vs.85).aspx 17 type memorystatusex struct { 18 dwLength uint32 19 dwMemoryLoad uint32 20 ullTotalPhys uint64 21 ullAvailPhys uint64 22 ullTotalPageFile uint64 23 ullAvailPageFile uint64 24 ullTotalVirtual uint64 25 ullAvailVirtual uint64 26 ullAvailExtendedVirtual uint64 27 } 28 29 // ReadMemInfo retrieves memory statistics of the host system and returns a 30 // MemInfo type. 31 func ReadMemInfo() (*MemInfo, error) { 32 msi := &memorystatusex{ 33 dwLength: 64, 34 } 35 r1, _, _ := procGlobalMemoryStatusEx.Call(uintptr(unsafe.Pointer(msi))) 36 if r1 == 0 { 37 return &MemInfo{}, nil 38 } 39 return &MemInfo{ 40 MemTotal: int64(msi.ullTotalPhys), 41 MemFree: int64(msi.ullAvailPhys), 42 SwapTotal: int64(msi.ullTotalPageFile), 43 SwapFree: int64(msi.ullAvailPageFile), 44 }, nil 45 }