Vendor psutils and remove neko

plugins/system/ps/mem/mem_windows.go

@@ -0,0 +1,50 @@
+// +build windows
+
+package mem
+
+import (
+	"syscall"
+	"unsafe"
+
+	common "github.com/shirou/gopsutil/common"
+)
+
+var (
+	procGlobalMemoryStatusEx = common.Modkernel32.NewProc("GlobalMemoryStatusEx")
+)
+
+type MEMORYSTATUSEX struct {
+	cbSize                  uint32
+	dwMemoryLoad            uint32
+	ullTotalPhys            uint64 // in bytes
+	ullAvailPhys            uint64
+	ullTotalPageFile        uint64
+	ullAvailPageFile        uint64
+	ullTotalVirtual         uint64
+	ullAvailVirtual         uint64
+	ullAvailExtendedVirtual uint64
+}
+
+func VirtualMemory() (*VirtualMemoryStat, error) {
+	var memInfo MEMORYSTATUSEX
+	memInfo.cbSize = uint32(unsafe.Sizeof(memInfo))
+	mem, _, _ := procGlobalMemoryStatusEx.Call(uintptr(unsafe.Pointer(&memInfo)))
+	if mem == 0 {
+		return nil, syscall.GetLastError()
+	}
+
+	ret := &VirtualMemoryStat{
+		Total:       memInfo.ullTotalPhys,
+		Available:   memInfo.ullAvailPhys,
+		UsedPercent: float64(memInfo.dwMemoryLoad),
+	}
+
+	ret.Used = ret.Total - ret.Available
+	return ret, nil
+}
+
+func SwapMemory() (*SwapMemoryStat, error) {
+	ret := &SwapMemoryStat{}
+
+	return ret, nil
+}