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102 lines
2.1 KiB
Go

//+build darwin
package staros
import (
"encoding/binary"
"fmt"
"golang.org/x/sys/unix"
"os/exec"
"strconv"
"strings"
"unsafe"
)
// Memory 系统内存信息
func Memory() (MemStatus,error) {
return darwinMemory()
}
type swapUsage struct {
Total uint64
Avail uint64
Used uint64
Pagesize int32
Encrypted bool
}
func darwinMemory() (MemStatus, error) {
var err error
var res MemStatus
vm_stat, err := exec.LookPath("vm_stat")
if err != nil {
return res, err
}
out, err := exec.Command(vm_stat).CombinedOutput()
if err != nil {
return res, err
}
totalString, err := unix.Sysctl("hw.memsize")
if err != nil {
return res, err
}
// unix.sysctl() helpfully assumes the result is a null-terminated string and
// removes the last byte of the result if it's 0 :/
totalString += "\x00"
res.All = uint64(binary.LittleEndian.Uint64([]byte(totalString)))
lines := strings.Split(string(out), "\n")
pagesize := uint64(unix.Getpagesize())
for _, line := range lines {
fields := strings.Split(line, ":")
if len(fields) < 2 {
continue
}
key := strings.TrimSpace(fields[0])
value := strings.Trim(fields[1], " .")
switch key {
case "Pages free":
free, e := strconv.ParseUint(value, 10, 64)
if e != nil {
err = e
}
res.Free = free * pagesize
case "Pages inactive":
inactive, e := strconv.ParseUint(value, 10, 64)
if e != nil {
err = e
}
res.Available = inactive * pagesize
case "Pages active":
active, e := strconv.ParseUint(value, 10, 64)
if e != nil {
err = e
}
_ = active * pagesize
case "Pages wired down":
wired, e := strconv.ParseUint(value, 10, 64)
if e != nil {
err = e
}
_ = wired * pagesize
}
}
res.Available += res.Free
res.Used = res.All - res.Available
//swap
value, err := unix.SysctlRaw("vm.swapusage")
if err != nil {
return res, err
}
if len(value) != 32 {
return res, fmt.Errorf("unexpected output of sysctl vm.swapusage: %v (len: %d)", value, len(value))
}
swap := (*swapUsage)(unsafe.Pointer(&value[0]))
res.SwapAll = swap.Total
res.SwapUsed = swap.Used
res.SwapFree = swap.Avail
return res, err
}