mem_darwin.go

Documentation: github.com/shirou/gopsutil/mem

     1  // +build darwin
     2  
     3  package mem
     4  
     5  import (
     6  	"context"
     7  	"fmt"
     8  	"unsafe"
     9  
    10  	"github.com/shirou/gopsutil/internal/common"
    11  	"golang.org/x/sys/unix"
    12  )
    13  
    14  func getHwMemsize() (uint64, error) {
    15  	total, err := unix.SysctlUint64("hw.memsize")
    16  	if err != nil {
    17  		return 0, err
    18  	}
    19  	return total, nil
    20  }
    21  
    22  // xsw_usage in sys/sysctl.h
    23  type swapUsage struct {
    24  	Total     uint64
    25  	Avail     uint64
    26  	Used      uint64
    27  	Pagesize  int32
    28  	Encrypted bool
    29  }
    30  
    31  // SwapMemory returns swapinfo.
    32  func SwapMemory() (*SwapMemoryStat, error) {
    33  	return SwapMemoryWithContext(context.Background())
    34  }
    35  
    36  func SwapMemoryWithContext(ctx context.Context) (*SwapMemoryStat, error) {
    37  	// https://github.com/yanllearnn/go-osstat/blob/ae8a279d26f52ec946a03698c7f50a26cfb427e3/memory/memory_darwin.go
    38  	var ret *SwapMemoryStat
    39  
    40  	value, err := unix.SysctlRaw("vm.swapusage")
    41  	if err != nil {
    42  		return ret, err
    43  	}
    44  	if len(value) != 32 {
    45  		return ret, fmt.Errorf("unexpected output of sysctl vm.swapusage: %v (len: %d)", value, len(value))
    46  	}
    47  	swap := (*swapUsage)(unsafe.Pointer(&value[0]))
    48  
    49  	u := float64(0)
    50  	if swap.Total != 0 {
    51  		u = ((float64(swap.Total) - float64(swap.Avail)) / float64(swap.Total)) * 100.0
    52  	}
    53  
    54  	ret = &SwapMemoryStat{
    55  		Total:       swap.Total,
    56  		Used:        swap.Used,
    57  		Free:        swap.Avail,
    58  		UsedPercent: u,
    59  	}
    60  
    61  	return ret, nil
    62  }
    63  
    64  func SwapDevices() ([]*SwapDevice, error) {
    65  	return SwapDevicesWithContext(context.Background())
    66  }
    67  
    68  func SwapDevicesWithContext(ctx context.Context) ([]*SwapDevice, error) {
    69  	return nil, common.ErrNotImplementedError
    70  }
    71
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