mirror of https://github.com/cjbassi/gotop.git
96 lines
2.2 KiB
Go
96 lines
2.2 KiB
Go
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// +build darwin
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// +build cgo
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package disk
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/*
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#cgo LDFLAGS: -lobjc -framework Foundation -framework IOKit
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#include <stdint.h>
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// ### enough?
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const int MAX_DISK_NAME = 100;
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typedef struct
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{
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char DiskName[MAX_DISK_NAME];
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int64_t Reads;
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int64_t Writes;
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int64_t ReadBytes;
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int64_t WriteBytes;
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int64_t ReadTime;
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int64_t WriteTime;
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} DiskInfo;
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#include "disk_darwin.h"
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*/
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import "C"
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import (
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"context"
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"errors"
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"strings"
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"unsafe"
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"github.com/shirou/gopsutil/internal/common"
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)
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func IOCounters(names ...string) (map[string]IOCountersStat, error) {
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return IOCountersWithContext(context.Background(), names...)
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}
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func IOCountersWithContext(ctx context.Context, names ...string) (map[string]IOCountersStat, error) {
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if C.StartIOCounterFetch() == 0 {
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return nil, errors.New("Unable to fetch disk list")
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}
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// Clean up when we are done.
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defer C.EndIOCounterFetch()
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ret := make(map[string]IOCountersStat, 0)
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for {
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res := C.FetchNextDisk()
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if res == -1 {
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return nil, errors.New("Unable to fetch disk information")
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} else if res == 0 {
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break // done
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}
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di := C.DiskInfo{}
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if C.ReadDiskInfo((*C.DiskInfo)(unsafe.Pointer(&di))) == -1 {
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return nil, errors.New("Unable to fetch disk properties")
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}
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// Used to only get the necessary part of the C string.
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isRuneNull := func(r rune) bool {
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return r == '\u0000'
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}
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// Map from the darwin-specific C struct to the Go type
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//
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// ### missing: IopsInProgress, WeightedIO, MergedReadCount,
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// MergedWriteCount, SerialNumber
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// IOKit can give us at least the serial number I think...
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d := IOCountersStat{
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// Note: The Go type wants unsigned values, but CFNumberGetValue
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// doesn't appear to be able to give us unsigned values. So, we
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// cast, and hope for the best.
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ReadBytes: uint64(di.ReadBytes),
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WriteBytes: uint64(di.WriteBytes),
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ReadCount: uint64(di.Reads),
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WriteCount: uint64(di.Writes),
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ReadTime: uint64(di.ReadTime),
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WriteTime: uint64(di.WriteTime),
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IoTime: uint64(di.ReadTime + di.WriteTime),
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Name: strings.TrimFunc(C.GoStringN(&di.DiskName[0], C.MAX_DISK_NAME), isRuneNull),
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}
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if len(names) > 0 && !common.StringsHas(names, d.Name) {
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continue
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}
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ret[d.Name] = d
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}
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return ret, nil
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}
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