70 lines
1.5 KiB
Go
70 lines
1.5 KiB
Go
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// +build darwin
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package mem
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import (
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"context"
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"encoding/binary"
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"fmt"
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"unsafe"
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"golang.org/x/sys/unix"
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)
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func getHwMemsize() (uint64, error) {
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totalString, err := unix.Sysctl("hw.memsize")
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if err != nil {
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return 0, err
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}
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// unix.sysctl() helpfully assumes the result is a null-terminated string and
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// removes the last byte of the result if it's 0 :/
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totalString += "\x00"
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total := uint64(binary.LittleEndian.Uint64([]byte(totalString)))
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return total, nil
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}
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// xsw_usage in sys/sysctl.h
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type swapUsage struct {
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Total uint64
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Avail uint64
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Used uint64
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Pagesize int32
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Encrypted bool
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}
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// SwapMemory returns swapinfo.
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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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// https://github.com/yanllearnn/go-osstat/blob/ae8a279d26f52ec946a03698c7f50a26cfb427e3/memory/memory_darwin.go
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var ret *SwapMemoryStat
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value, err := unix.SysctlRaw("vm.swapusage")
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if err != nil {
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return ret, err
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}
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if len(value) != 32 {
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return ret, fmt.Errorf("unexpected output of sysctl vm.swapusage: %v (len: %d)", value, len(value))
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}
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swap := (*swapUsage)(unsafe.Pointer(&value[0]))
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u := float64(0)
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if swap.Total != 0 {
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u = ((float64(swap.Total) - float64(swap.Avail)) / float64(swap.Total)) * 100.0
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}
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ret = &SwapMemoryStat{
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Total: swap.Total,
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Used: swap.Used,
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Free: swap.Avail,
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UsedPercent: u,
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}
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return ret, nil
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}
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