61 lines
1.3 KiB
Go
61 lines
1.3 KiB
Go
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// +build windows
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package memory
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import (
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"syscall"
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"unsafe"
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)
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// omitting a few fields for brevity...
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa366589(v=vs.85).aspx
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type memStatusEx struct {
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dwLength uint32
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dwMemoryLoad uint32
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ullTotalPhys uint64
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ullAvailPhys uint64
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unused [5]uint64
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}
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func sysTotalMemory() uint64 {
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kernel32, err := syscall.LoadDLL("kernel32.dll")
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if err != nil {
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return 0
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}
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// GetPhysicallyInstalledSystemMemory is simpler, but broken on
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// older versions of windows (and uses this under the hood anyway).
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globalMemoryStatusEx, err := kernel32.FindProc("GlobalMemoryStatusEx")
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if err != nil {
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return 0
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}
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msx := &memStatusEx{
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dwLength: 64,
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}
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r, _, _ := globalMemoryStatusEx.Call(uintptr(unsafe.Pointer(msx)))
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if r == 0 {
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return 0
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}
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return msx.ullTotalPhys
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}
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func sysFreeMemory() uint64 {
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kernel32, err := syscall.LoadDLL("kernel32.dll")
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if err != nil {
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return 0
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}
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// GetPhysicallyInstalledSystemMemory is simpler, but broken on
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// older versions of windows (and uses this under the hood anyway).
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globalMemoryStatusEx, err := kernel32.FindProc("GlobalMemoryStatusEx")
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if err != nil {
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return 0
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}
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msx := &memStatusEx{
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dwLength: 64,
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}
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r, _, _ := globalMemoryStatusEx.Call(uintptr(unsafe.Pointer(msx)))
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if r == 0 {
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return 0
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}
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return msx.ullAvailPhys
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}
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