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// +build windows
package mem
import (
"context"
"unsafe"
"github.com/shirou/gopsutil/internal/common"
"golang.org/x/sys/windows"
)
var (
procGlobalMemoryStatusEx = common.Modkernel32.NewProc("GlobalMemoryStatusEx")
procGetPerformanceInfo = common.ModPsapi.NewProc("GetPerformanceInfo")
)
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) {
return VirtualMemoryWithContext(context.Background())
}
func VirtualMemoryWithContext(ctx context.Context) (*VirtualMemoryStat, error) {
var memInfo memoryStatusEx
memInfo.cbSize = uint32(unsafe.Sizeof(memInfo))
mem, _, _ := procGlobalMemoryStatusEx.Call(uintptr(unsafe.Pointer(&memInfo)))
if mem == 0 {
return nil, windows.GetLastError()
}
ret := &VirtualMemoryStat{
Total: memInfo.ullTotalPhys,
Available: memInfo.ullAvailPhys,
UsedPercent: float64(memInfo.dwMemoryLoad),
}
ret.Used = ret.Total - ret.Available
return ret, nil
}
type performanceInformation struct {
cb uint32
commitTotal uint64
commitLimit uint64
commitPeak uint64
physicalTotal uint64
physicalAvailable uint64
systemCache uint64
kernelTotal uint64
kernelPaged uint64
kernelNonpaged uint64
pageSize uint64
handleCount uint32
processCount uint32
threadCount uint32
}
func SwapMemory() (*SwapMemoryStat, error) {
return SwapMemoryWithContext(context.Background())
}
func SwapMemoryWithContext(ctx context.Context) (*SwapMemoryStat, error) {
var perfInfo performanceInformation
perfInfo.cb = uint32(unsafe.Sizeof(perfInfo))
mem, _, _ := procGetPerformanceInfo.Call(uintptr(unsafe.Pointer(&perfInfo)), uintptr(perfInfo.cb))
if mem == 0 {
return nil, windows.GetLastError()
}
tot := perfInfo.commitLimit * perfInfo.pageSize
used := perfInfo.commitTotal * perfInfo.pageSize
free := tot - used
ret := &SwapMemoryStat{
Total: tot,
Used: used,
Free: free,
UsedPercent: float64(used / tot),
}
return ret, nil
}
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