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