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102 lines
2.1 KiB
Go
102 lines
2.1 KiB
Go
//+build darwin
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package staros
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import (
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"encoding/binary"
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"fmt"
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"golang.org/x/sys/unix"
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"os/exec"
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"strconv"
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"strings"
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"unsafe"
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)
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// Memory 系统内存信息
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func Memory() (MemStatus,error) {
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return darwinMemory()
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}
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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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func darwinMemory() (MemStatus, error) {
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var err error
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var res MemStatus
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vm_stat, err := exec.LookPath("vm_stat")
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if err != nil {
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return res, err
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}
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out, err := exec.Command(vm_stat).CombinedOutput()
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if err != nil {
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return res, err
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}
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totalString, err := unix.Sysctl("hw.memsize")
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if err != nil {
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return res, 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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res.All = uint64(binary.LittleEndian.Uint64([]byte(totalString)))
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lines := strings.Split(string(out), "\n")
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pagesize := uint64(unix.Getpagesize())
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for _, line := range lines {
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fields := strings.Split(line, ":")
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if len(fields) < 2 {
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continue
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}
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key := strings.TrimSpace(fields[0])
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value := strings.Trim(fields[1], " .")
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switch key {
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case "Pages free":
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free, e := strconv.ParseUint(value, 10, 64)
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if e != nil {
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err = e
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}
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res.Free = free * pagesize
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case "Pages inactive":
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inactive, e := strconv.ParseUint(value, 10, 64)
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if e != nil {
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err = e
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}
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res.Available = inactive * pagesize
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case "Pages active":
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active, e := strconv.ParseUint(value, 10, 64)
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if e != nil {
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err = e
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}
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_ = active * pagesize
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case "Pages wired down":
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wired, e := strconv.ParseUint(value, 10, 64)
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if e != nil {
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err = e
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}
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_ = wired * pagesize
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}
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}
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res.Available += res.Free
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res.Used = res.All - res.Available
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//swap
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value, err := unix.SysctlRaw("vm.swapusage")
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if err != nil {
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return res, err
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}
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if len(value) != 32 {
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return res, 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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res.SwapAll = swap.Total
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res.SwapUsed = swap.Used
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res.SwapFree = swap.Avail
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return res, err
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}
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