upgrade to support writing to a memmap file

constants.go

@@ -8,9 +8,10 @@ type Msg struct {
 }
 
 const (
+	MEMMAPFILENAME                  = "IRSDKMemMapFileName"
 	SimStatusUrl             string = "http://127.0.0.1:32034/get_sim_status?object=simStatus"
 	IRSDK_DATAVALIDEVENTNAME string = "Local\\IRSDKDataValidEvent"
-	IRSDK_MEMMAPFILENAME     string = "Local\\IRSDKMemMapFileName"
+	IRSDK_MEMMAPFILENAME     string = "Local\\" + MEMMAPFILENAME
 	IRSDK_BROADCASTMSGNAME   string = "IRSDK_BROADCASTMSG"
 	fileMapSize              uint32 = 1164 * 1024
 	connTimeout              int64  = 30
@@ -133,9 +134,11 @@ var (
 	irsdkPitSpeedLimiter     = bitfieldValue{0x10, "irsdk_pitSpeedLimiter"}
 	irsdkRevLimiterActive    = bitfieldValue{0x20, "irsdk_revLimiterActive"}
 	irsdkAbsActive           = bitfieldValue{0x100, "irsdk_absActive"}
-	irsdkEngineWarnings      = []bitfieldValue{irsdkWaterTempWarning, irsdkFuelPressureWarning,
+	irsdkEngineWarnings      = []bitfieldValue{
+		irsdkWaterTempWarning, irsdkFuelPressureWarning,
 		irsdkOilPressureWarning, irsdkEngineStalled, irsdkPitSpeedLimiter, irsdkRevLimiterActive,
-		irsdkAbsActive}
+		irsdkAbsActive,
+	}
 )
 
 // enum irsdk_EngineWarnings

diskSubHeader.go

@@ -1,11 +1,11 @@
 package goirsdk
 
 import (
-	"github.com/ESilva15/goirsdk/logger"
-
 	"bytes"
 	"encoding/binary"
 	"fmt"
+
+	"github.com/ESilva15/goirsdk/logger"
 )
 
 const (
@@ -28,18 +28,18 @@ func (i *IBT) readSubheader() error {
 	var subheaderRaw [SubHeaderSize]byte
 	_, err := i.File.ReadAt(subheaderRaw[:], HeaderSize)
 	if err != nil {
-		return fmt.Errorf("Failed to read disk subheaders from file: %v", err)
+		return fmt.Errorf("failed to read disk subheaders from file: %v", err)
 	}
 	i.SubHeaders, err = parseTelemetrySubHeader(subheaderRaw)
 	if err != nil {
-		return fmt.Errorf("Unable to parse disk subheaders from file: %v", err)
+		return fmt.Errorf("unable to parse disk subheaders from file: %v", err)
 	}
 
 	// Write to the output file - TODO add the check
-	if i.IBTExport != nil {
+	if i.Opts.IBTExport {
-    err = i.exportIBT(subheaderRaw[:], HeaderSize)
+		err = i.exportIBT(subheaderRaw[:], HeaderSize)
 		if err != nil {
-      log.Printf("Failed to export subheaders: %v\n", err)
+			log.Printf("failed to export subheaders: %v\n", err)
 		}
 	}
 

examples/example.go

@@ -3,7 +3,6 @@ package main
 import (
 	"fmt"
 	"log"
-	"os"
 	"time"
 
 	"github.com/ESilva15/goirsdk"
@@ -14,21 +13,23 @@ func msToKph(v float32) int {
 }
 
 func main() {
-	// Open the data source file
-	file, err := os.Open("/path/to/ibtFile")
-	if err != nil {
-		log.Fatalf("Failed to open IBT file: %v", err)
-	}
-
 	// Instantiate our iRacing SDK instance
-	irsdk, err := goirsdk.Init(file, "", "")
+	irsdk, err := goirsdk.Init(goirsdk.Options{
+		SourceType: goirsdk.IBTFile,
+		SourcePath: "../../../testTelemetry/gt3_mustang_bathurst.ibt",
+		// SourcePath:    "./exported.ibt",
+		IBTExportType: goirsdk.SharedMemoryFile,
+		// IBTExportPath: "./exported.ibt",
+		IBTExport: true,
+	})
 	if err != nil {
 		log.Fatalf("Failed to create iRacing interface: %v", err)
 	}
 	defer irsdk.Close()
 
 	// Set up a loop to iterate our data
-	mainLoopTicker := time.NewTicker(time.Second / 60)
+	// TODO: revert this 240 back to 60 because i recorded the thing wrong or whatever
+	mainLoopTicker := time.NewTicker(time.Second / 240)
 	defer mainLoopTicker.Stop()
 
 	for {

headers.go

@@ -1,11 +1,11 @@
 package goirsdk
 
 import (
-	"github.com/ESilva15/goirsdk/logger"
-
 	"bytes"
 	"encoding/binary"
 	"fmt"
+
+	"github.com/ESilva15/goirsdk/logger"
 )
 
 const (
@@ -15,30 +15,19 @@ const (
 
 // TelemetryHeaders struct to hold an IBT file's headers
 type TelemetryHeaders struct {
-	Version int32
+	Version           int32
-	// Status of 1 indicates a completed session and status of 0 a live session
+	Status            int32 // Status of 1 indicates a completed session and status of 0 a live session
-	Status int32
+	TickRate          int32 // TickRate indicates the frequency of writes (usually 60)
-	// TickRate indicates the frequency of writes (usually 60)
+	SessionInfoUpdate int32 // SessionInfoUpdate indicates the number of times the SessionInfo was
-	TickRate int32
-	// SessionInfoUpdate indicates the number of times the SessionInfo was
 	// updated. 0 for finished sessions and >1 for active sessions
-	SessionInfoUpdate int32
+	SessionInfoLength int32    // SessionInfoLength is the length of the session info buffer
-	// SessionInfoLength is the length of the session info buffer
+	SessionInfoOffset int32    // SessionInfoOffset is the offset of the session info in the buffer
-	SessionInfoLength int32
+	NumVars           int32    // NumVars is the number of variables in each input
-	// SessionInfoOffset is the offset of the session info in the buffer
+	VarHeaderOffset   int32    // VarHeaderOffset is the offset of the VarHeader
-	SessionInfoOffset int32
+	NumBuf            int32    // NumBuf will be 1 for static files and 3 for live telemetry files
-	// NumVars is the number of variables in each input
+	BufLen            int32    // BufLen is the length for parsing VarHeader values
-	NumVars int32
+	Padding           [12]byte // Padding
-	// VarHeaderOffset is the offset of the VarHeader
+	BufOffset         int32    // I still don't know what this is:
-	VarHeaderOffset int32
-	// NumBuf will be 1 for static files and 3 for live telemetry files
-	NumBuf int32
-	// BufLen is the length for parsing VarHeader values
-	BufLen int32
-	// Padding
-	Padding [12]byte
-	// I still don't know what this is:
-	BufOffset int32
 }
 
 // readHeader will read the header out of the telemetry data
@@ -48,18 +37,18 @@ func (i *IBT) readHeader() error {
 	var headerRaw [FileHeaderSize]byte
 	_, err := i.File.ReadAt(headerRaw[:], 0)
 	if err != nil {
-		return fmt.Errorf("Failed to read headers from file: %v", err)
+		return fmt.Errorf("failed to read headers from file: %v", err)
 	}
 	i.Headers, err = parseTelemetryHeader(headerRaw)
 	if err != nil {
-		return fmt.Errorf("Unable to read headers from file: %v", err)
+		return fmt.Errorf("unable to read headers from file: %v", err)
 	}
 
 	// Write to the output file - TODO: this should only write if necessary
-	if i.IBTExport != nil {
+	if i.Opts.IBTExport {
-    err = i.exportIBT(headerRaw[:], 0)
+		err = i.exportIBT(headerRaw[:], 0)
 		if err != nil {
-      log.Printf("Failed to export headers: %v\n", err)
+			log.Printf("Failed to export headers: %v\n", err)
 		}
 	}
 

irsdk.go

@@ -3,23 +3,15 @@ package goirsdk
 
 import (
 	"fmt"
+	"io"
 	"os"
 
-	"io"
-
 	"github.com/ESilva15/goirsdk/logger"
+	"github.com/ESilva15/goirsdk/sharedMem"
 	"github.com/ESilva15/goirsdk/winutils"
 	"gopkg.in/yaml.v3"
 )
 
-const (
-	ibtFile = "./telemetryFiles/mx5_2016Okayama_full_2024_10_19_22_02_12.ibt"
-)
-
-func msToKph(v float32) int {
-	return int((3600 * v) / 1000)
-}
-
 // Reader is an interface to represent the readable data that can be either
 // a .ibt file (or live data, hopefully)
 type Reader interface {
@@ -28,18 +20,47 @@ type Reader interface {
 	io.ReadCloser
 }
 
+type Writer interface {
+	io.WriterAt
+	io.Closer
+}
+
+type TelemetryContainer int
+
+const (
+	IBTFile          TelemetryContainer = iota
+	SharedMemoryFile TelemetryContainer = iota
+)
+
+type Options struct {
+	SourceType            TelemetryContainer // type of source data
+	SourcePath            string             // Path to source
+	IBTExportType         TelemetryContainer // export type of telemetry: store .ibt or replay in shm
+	IBTExportPath         string             // path where to export the data
+	IBTExport             bool               // whether to export the telemetry data
+	SessionInfoExport     bool               // whether to export the session info data
+	SessionInfoExportPath string             // path where to export the session info
+}
+
 // IBT struct will hold the relevant data for a given IBT file
 type IBT struct {
-	File           Reader                    // Source of the data
+	File Reader // Source of the data
-	IBTExport      *os.File                  // If set, it will export the IBT data to the file
+	Opts Options
-	IBTExportPath  string                    // Path for IBT export
+	// TODO: IBTExporter should be an interface because we need to support shm too
-	YAMLExport     *os.File                  // If set, it will export the session YAML to the file
+	IBTExporter Writer
-	YAMLExportPath string                    // Path for YAML export
+	// IBTExport *os.File // If set, it will export the IBT data to the file
-	Headers        *TelemetryHeaders         // IBT file Headers
+	// IBTExportPath  string                    // Path for IBT export
-	SubHeaders     *DiskSubHeader            // IBT file Sub Headers
+	// YAMLExport     *os.File                  // If set, it will export the session YAML to the file
-	SessionInfo    *SessionInfoYAML          // IBT file Session Info
+	// YAMLExportPath string                    // Path for YAML export
-	Vars           *TelemetryVars            // Vars will hold the telemetry data
+	winUtils *winutils.IRacingWinUtils // WinUtils gives access to the system utilities
-	winUtils       *winutils.IRacingWinUtils // WinUtils gives access to the system utilities
+
+	// TODO: fragment this struct a little bit, for now I want to actually get
+	// stuff done so its enough to work as is
+	// Actual FILE
+	Headers     *TelemetryHeaders // IBT file Headers
+	SubHeaders  *DiskSubHeader    // IBT file Sub Headers
+	SessionInfo *SessionInfoYAML  // IBT file Session Info
+	Vars        *TelemetryVars    // Vars will hold the telemetry data
 }
 
 func (i *IBT) IsConnected() bool {
@@ -58,7 +79,7 @@ func (i *IBT) IsConnected() bool {
 func (i *IBT) exportYAML() error {
 	log := logger.GetInstance()
 
-	file, err := os.OpenFile(i.YAMLExportPath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
+	file, err := os.OpenFile(i.Opts.SessionInfoExportPath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0o644)
 	if err != nil {
 		log.Printf("Failed to open file for YAML export: %v\n", err)
 		return fmt.Errorf("failed to open output file for YAML: %v", err)
@@ -79,11 +100,10 @@ func (i *IBT) exportYAML() error {
 func (i *IBT) exportIBT(data []byte, offset int64) error {
 	log := logger.GetInstance()
 
-	_, err := i.IBTExport.WriteAt(data, offset)
+	_, err := i.IBTExporter.WriteAt(data, offset)
-
 	if err != nil {
-		i.IBTExport.Close()
+		i.IBTExporter.Close()
-		i.IBTExport = nil
+		i.IBTExporter = nil
 		log.Println("Won't attempt to export anymore")
 		return err
 	}
@@ -91,61 +111,96 @@ func (i *IBT) exportIBT(data []byte, offset int64) error {
 	return nil
 }
 
-// Init serves to initialize and get a hold of a IBT struct
+func (i *IBT) openSource() error {
-// f -> is the source data, pass nil for the SDK to read live data or a
-// *os.File to read from a file
-// exportTelem -> is a string with the path to export the telemetry data, pass
-// an empty string to not export any data
-// exportTelem -> is a string with the path to export the session info data, pass
-// an empty string to not export any data
-func Init(f Reader, exportTelem string, exportYAML string) (*IBT, error) {
-	// log := logger.GetInstance()
-
-	// Read the header of the file
 	var err error
-	ibt := IBT{
-		File:           f,
-		IBTExport:      nil,
-		IBTExportPath:  exportTelem,
-		YAMLExport:     nil,
-		YAMLExportPath: exportYAML,
-		Vars:           &TelemetryVars{},
-		winUtils:       nil,
-	}
 
-	// If requested to output to a telemetry file
+	switch i.Opts.SourceType {
-	if exportTelem != "" {
+	case SharedMemoryFile:
-		ibt.IBTExport, err = os.OpenFile(exportTelem, os.O_CREATE|os.O_RDWR, 0644)
-		if err != nil {
-			return nil, fmt.Errorf("failed to open ibt export file: %v", err)
-		}
-	}
-
-	if ibt.File == nil {
 		// User is requesting us to read live data - present in the mem map file
-		ibt.File, err = winutils.OpenMemMap(IRSDK_MEMMAPFILENAME, fileMapSize)
+		i.File, err = winutils.OpenMemMap(IRSDK_MEMMAPFILENAME, fileMapSize)
 		if err != nil {
-			return nil, fmt.Errorf("Failed to open memory mapped file: %v", err)
+			return fmt.Errorf("failed to open memory mapped file: %v", err)
 		}
 
 		// To use our windows interface we need to initialize it first
 		// it will return a struct with a pointer to the windows handles
 		// if, for some reason, we need to stub out this to run in on Linux its easier
-		ibt.winUtils, err = winutils.Init()
+		i.winUtils, err = winutils.Init()
 		if err != nil {
-			return nil, err
+			return err
 		}
 
 		// We need to open the windows event thing
-		err = ibt.winUtils.OpenWinEvent(IRSDK_DATAVALIDEVENTNAME)
+		err = i.winUtils.OpenWinEvent(IRSDK_DATAVALIDEVENTNAME)
 		if err != nil {
-			return nil, err
+			return err
 		}
 
 		// We need to open the broadcast channel
-		err = ibt.winUtils.OpenBroadcastChannel(IRSDK_BROADCASTMSGNAME)
+		err = i.winUtils.OpenBroadcastChannel(IRSDK_BROADCASTMSGNAME)
 		if err != nil {
-			return nil, err
+			return err
+		}
+	case IBTFile:
+		i.File, err = os.Open(i.Opts.SourcePath)
+		if err != nil {
+			return fmt.Errorf("failed to open file `%s`: %+v", i.Opts.SourcePath, err)
+		}
+	default:
+		return fmt.Errorf("a source type must be specified")
+	}
+
+	return nil
+}
+
+func (i *IBT) openExporter() error {
+	var err error
+
+	switch i.Opts.IBTExportType {
+	case SharedMemoryFile:
+		// Lets create a shared memory file!
+		shm, err := sharedMem.Create(MEMMAPFILENAME, fileMapSize)
+		if err != nil {
+			return fmt.Errorf("unable to create memory map file: %+v", err)
+		}
+
+		i.IBTExporter = shm
+	case IBTFile:
+		i.IBTExporter, err = os.OpenFile(i.Opts.IBTExportPath, os.O_CREATE|os.O_RDWR, 0o644)
+		if err != nil {
+			return fmt.Errorf("failed to open ibt export file: %v", err)
+		}
+	}
+
+	return nil
+}
+
+// Init serves to initialize and get a hold of a IBT struct
+// Receives an Options struct with the required configurations
+func Init(opts Options) (*IBT, error) {
+	// log := logger.GetInstance()
+
+	// Create our irsdk instance
+	var err error
+	ibt := IBT{
+		Opts:     opts,
+		Vars:     &TelemetryVars{},
+		winUtils: nil,
+	}
+
+	// Setup the source
+	err = ibt.openSource()
+	if err != nil {
+		return nil, err
+	}
+
+	// Setup the IBT data export - can be either shared memory or data file
+	if opts.IBTExport {
+		err = ibt.openExporter()
+		if err != nil {
+			// We log this only, or return some type of message
+			// Set the option to false so we won't export
+			ibt.Opts.IBTExport = false
 		}
 	}
 

irsdk_test.go

@@ -30,7 +30,7 @@ func lapTimeRepresentation(t float32) string {
 }
 
 func TestFunctionality(t *testing.T) {
-	input, err := os.Open("../testTelemetry/supercars_race_watkins_glenn.ibt")
+	input, err := os.Open("../../testTelemetry/supercars_race_watkins_glenn.ibt")
 	if err != nil {
 		t.Fatal("Was unable to prepare telemetry file for testing.")
 	}
@@ -62,7 +62,7 @@ func TestFunctionality(t *testing.T) {
 		// driversBehind := i.Vars.Vars["CarIdxF2Time"].Value.([]float32)
 
 		drivers := i.SessionInfo.DriverInfo.Drivers
-    myIdx := i.SessionInfo.DriverInfo.DriverCarIdx
+		myIdx := i.SessionInfo.DriverInfo.DriverCarIdx
 
 		standings := make([]StandingsLine, len(drivers))
 
@@ -90,7 +90,7 @@ func TestFunctionality(t *testing.T) {
 			return standings[i].LapPct >= standings[j].LapPct
 		})
 
-    fmt.Printf("%v\n", driversEstTime)
+		fmt.Printf("%v\n", driversEstTime)
 		// for p, v := range standings {
 		// 	fmt.Printf("[%2d] %-30s %13f %13f\n",
 		// 		p+1, v.DriverName, v.LapPct, driversEstTime[p] - driversEstTime[myIdx])

sessionInfo.go

@@ -1,13 +1,13 @@
 package goirsdk
 
 import (
-	"github.com/ESilva15/goirsdk/logger"
-
 	"encoding/json"
 	"fmt"
 	"log"
 	"strings"
 
+	"github.com/ESilva15/goirsdk/logger"
+
 	"golang.org/x/text/encoding/charmap"
 	"gopkg.in/yaml.v3"
 )
@@ -321,7 +321,7 @@ func (i *IBT) readSessionInfo() error {
 	}
 
 	// Write to the output file
-	if i.IBTExport != nil {
+	if i.Opts.IBTExport {
 		err := i.exportIBT(sessionInfoStringRaw[:], int64(i.Headers.SessionInfoOffset))
 		if err != nil {
 			log.Printf("Failed to export offline telemetry data: %v", err)
@@ -334,7 +334,7 @@ func (i *IBT) readSessionInfo() error {
 	}
 
 	// Write to YAML output file
-	if i.YAMLExportPath != "" {
+	if i.Opts.SessionInfoExport {
 		err := i.exportYAML()
 		if err != nil {
 			log.Printf("Failed to export YAML string: %v\n", err)

variables.go

@@ -40,11 +40,13 @@ var (
 	}
 )
 
-type IRacingState int
+type (
-type VarType struct {
+	IRacingState int
-	Size int    // Size is the var type size in bytes
+	VarType      struct {
-	Name string // Name is the irsdk var name
+		Size int    // Size is the var type size in bytes
-}
+		Name string // Name is the irsdk var name
+	}
+)
 
 type IBTVar struct {
 	Type        int32
@@ -106,9 +108,10 @@ type varBuffer struct {
 }
 
 type TelemetryVars struct {
-	Tick         int32          // Keeps track of the current data buffer tick
+	Tick         int32 // Keeps track of the current data buffer tick
-	RecorderTick int32          // Counts from 0 when creating a telemetry file from a replay or live data
+	RecorderTick int32 // Counts from 0 when creating a telemetry file from a
-	Vars         map[string]Var // Variables content
+	// replay or live data
+	Vars map[string]Var // Variables content
 }
 
 func (i *IBT) readVariablerHeaders() error {
@@ -123,7 +126,7 @@ func (i *IBT) readVariablerHeaders() error {
 			return err
 		}
 
-		if i.IBTExport != nil {
+		if i.Opts.IBTExport {
 			err = i.exportIBT(rbuf, int64(i.Headers.VarHeaderOffset+k*VarHeaderSize))
 			if err != nil {
 				// Don't outright kill it here - maybe nowhere else
@@ -306,6 +309,7 @@ func (i *IBT) readData(buf []byte) error {
 // Update will read the next data chunk from the telemetry data, works for both the
 // live and offline data
 func (i *IBT) Update(timeout time.Duration) (IRacingState, error) {
+	// This is what happens if we are reading live data
 	if i.winUtils != nil {
 		// Put a way to check if the sim is active here
 		// fmt.Println("NOT CHECKING IF SIM IS ACTIVE - ADD ME")
@@ -344,10 +348,19 @@ func (i *IBT) Update(timeout time.Duration) (IRacingState, error) {
 			return Failed, err
 		}
 
-		if i.IBTExport != nil {
+		if i.Opts.IBTExport {
-			err = i.exportIBT(buf, int64(i.Headers.BufOffset+i.Vars.RecorderTick*i.Headers.BufLen))
+			// Dirty attempt at getting this to work to write to a memory mapped file
-			if err != nil {
+			switch i.Opts.IBTExportType {
-				log.Printf("Failed to export live telemetry data: %v", err)
+			case IBTFile:
+				err = i.exportIBT(buf, int64(i.Headers.BufOffset+i.Vars.RecorderTick*i.Headers.BufLen))
+				if err != nil {
+					log.Printf("Failed to export live telemetry data: %v", err)
+				}
+			case SharedMemoryFile:
+				err = i.exportIBT(buf, int64(i.Headers.BufOffset))
+				if err != nil {
+					log.Printf("Failed to export live telemetry data: %v", err)
+				}
 			}
 		}
 
@@ -363,6 +376,7 @@ func (i *IBT) Update(timeout time.Duration) (IRacingState, error) {
 		// Document why this is here, I don't remember the exact words right now
 		i.Vars.RecorderTick++
 	} else {
+		// This is what happens if we are reading from an .ibt file
 		// This will get the dataframe corresponding to a given tick
 		start := i.Headers.BufOffset + i.Vars.Tick*i.Headers.BufLen
 		buf := make([]byte, i.Headers.BufLen)
@@ -370,10 +384,19 @@ func (i *IBT) Update(timeout time.Duration) (IRacingState, error) {
 
 		// Make this happen in a different thread, or have this send to a queue that has a thread
 		// writing to a file
-		if i.IBTExport != nil {
+		if i.Opts.IBTExport {
-			err = i.exportIBT(buf, int64(start))
+			// Dirty attempt at getting this to work to write to a memory mapped file
-			if err != nil {
+			switch i.Opts.IBTExportType {
-				log.Printf("Failed to export offline telemetry data: %v", err)
+			case IBTFile:
+				err = i.exportIBT(buf, int64(start))
+				if err != nil {
+					log.Printf("Failed to export offline telemetry data: %v", err)
+				}
+			case SharedMemoryFile:
+				err = i.exportIBT(buf, int64(i.Headers.BufOffset))
+				if err != nil {
+					log.Printf("Failed to export live telemetry data: %v", err)
+				}
 			}
 		}
 

winutils/winutils_linux.go

@@ -1,53 +1,116 @@
 //go:build (linux && cgo) || (darwin && cgo)
-// +build linux,cgo darwin,cgo
 
 package winutils
 
 import (
-	"errors"
+	"fmt"
-	"sync"
+	"net"
+	"os"
 	"time"
 )
 
-const (
-	WAIT_OBJECT_0 = 0
-	WAIT_TIMEOUT  = 258
-)
-
-var (
-	once             sync.Once
-	ErrUnsupportedOS = errors.New("not found")
-)
-
 type utils struct {
+	socketPath string
+	listener   *net.UnixConn
 }
 
-// INITIALIZATION
 func newUtils() (*utils, error) {
-	return nil, ErrUnsupportedOS
+	return &utils{}, nil
 }
 
 func (u *utils) Close() {
+	if u.listener != nil {
+		u.listener.Close()
+		os.Remove(u.socketPath)
+	}
 }
 
-// openEvent opens a windows.Handle for a given event
+// OpenEvent creates or connects to a Unix socket for event signaling on Linux
 func (u *utils) OpenEvent(eventName string) error {
-	return ErrUnsupportedOS
+	u.socketPath = fmt.Sprintf("/tmp/iracing_%s.sock", eventName)
+	_ = os.Remove(u.socketPath)
+
+	addr, err := net.ResolveUnixAddr("unixgram", u.socketPath)
+	if err != nil {
+		return err
+	}
+
+	l, err := net.ListenUnixgram("unixgram", addr)
+	if err != nil {
+		return err
+	}
+	u.listener = l
+	return nil
 }
 
-// OpenBroadcastChannel opens up a broadcast channel to send commands to iracing
 func (u *utils) OpenBroadcastChannel(name string) error {
-	return ErrUnsupportedOS
+	// No-op or log stub on Linux
+	return nil
 }
 
-// INITIALIZATION
+// CheckValidDataEvent waits for a pulse byte sent over the socket
-
-// openEvent waits for a good response for some given time
 func (u *utils) CheckValidDataEvent(timeout time.Duration) bool {
-	return false
+	if u.listener == nil {
+		return false
+	}
+
+	_ = u.listener.SetReadDeadline(time.Now().Add(timeout))
+	buf := make([]byte, 1)
+	_, err := u.listener.Read(buf)
+	return err == nil
 }
 
-// SendBroadcastMessage sends a message trough the broadcast channel
 func (u *utils) SendBroadcastMessage(id, p1, p2 uintptr) error {
-  return ErrUnsupportedOS
+	return nil
 }
+
+// package winutils
+//
+// import (
+// 	"errors"
+// 	"sync"
+// 	"time"
+// )
+//
+// const (
+// 	WAIT_OBJECT_0 = 0
+// 	WAIT_TIMEOUT  = 258
+// )
+//
+// var (
+// 	once             sync.Once
+// 	ErrUnsupportedOS = errors.New("not found")
+// )
+//
+// type utils struct {
+// }
+//
+// // INITIALIZATION
+// func newUtils() (*utils, error) {
+// 	return nil, ErrUnsupportedOS
+// }
+//
+// func (u *utils) Close() {
+// }
+//
+// // openEvent opens a windows.Handle for a given event
+// func (u *utils) OpenEvent(eventName string) error {
+// 	return ErrUnsupportedOS
+// }
+//
+// // OpenBroadcastChannel opens up a broadcast channel to send commands to iracing
+// func (u *utils) OpenBroadcastChannel(name string) error {
+// 	return ErrUnsupportedOS
+// }
+//
+// // INITIALIZATION
+//
+// // openEvent waits for a good response for some given time
+// func (u *utils) CheckValidDataEvent(timeout time.Duration) bool {
+// 	return false
+// }
+//
+// // SendBroadcastMessage sends a message trough the broadcast channel
+// func (u *utils) SendBroadcastMessage(id, p1, p2 uintptr) error {
+//   return ErrUnsupportedOS
+// }

winutils/winutils_windows.go

@@ -1,5 +1,4 @@
-//go:build windows && cgo
+// go:build windows
-// +build windows,cgo
 
 package winutils
 
@@ -16,13 +15,11 @@ const (
 	WAIT_TIMEOUT  = 258
 )
 
-var (
+var once sync.Once
-	once sync.Once
-)
 
 type utils struct {
 	user32DLL     *windows.LazyDLL
-	wEvent        *windows.Handle
+	wEvent        windows.Handle
 	wBroadcastChn uintptr
 }
 
@@ -34,7 +31,7 @@ func newUtils() (*utils, error) {
 }
 
 func (u *utils) Close() {
-	closeEvent(u.wEvent)
+	closeEvent(&u.wEvent)
 	// Do we need to unload the user32DLL ???
 	// Do we need to close the broadcast channel ???
 }
@@ -50,7 +47,7 @@ func (u *utils) OpenEvent(eventName string) error {
 	if err != nil {
 		return err
 	}
-	u.wEvent = &event
+	u.wEvent = event
 
 	return nil
 }
@@ -90,7 +87,7 @@ func (u *utils) CheckValidDataEvent(timeout time.Duration) bool {
 	t0 := time.Now().UnixNano()
 	timeoutInt := uint32(timeout / time.Millisecond)
 
-	result, err := windows.WaitForSingleObject(*u.wEvent, timeoutInt)
+	result, err := windows.WaitForSingleObject(u.wEvent, timeoutInt)
 	if err != nil {
 		remaining := timeoutInt - uint32((time.Now().UnixNano()-t0)/1000000)
 		if remaining > 0 {