fix: detect process

internal/app.go

@@ -15,6 +15,7 @@ import (
 )
 
 const sleepTime = 100 * time.Millisecond
+const executable = "kakaotalk.exe"
 
 var mutex = &sync.Mutex{}
 var handles = make([]windows.HWND, 0)
@@ -26,19 +27,17 @@ func uint8ToStr(arr []uint8) string {
 }
 
 func watch() {
-	const executeable = "kakaotalk.exe"
 	var (
 		pe32      winapi.ProcessEntry32
 		szExeFile string
 	)
-
-	snapshot := winapi.CreateToolhelp32Snapshot(winapi.Th32csSnapprocess, 0)
 	pe32.DwSize = uint32(unsafe.Sizeof(pe32))
-
+	lastFoundAt := time.Now().Unix() - 2
+	var snapshot windows.HWND
 	var enumWindow = syscall.NewCallback(func(handle windows.HWND, processId uintptr) uintptr {
 		winapi.GetWindowThreadProcessId(handle, &pe32.Th32ProcessID)
-
 		if processId == uintptr(pe32.Th32ProcessID) {
+			lastFoundAt = time.Now().Unix()
 			handles = append(handles, handle)
 		}
 		return 1
@@ -47,12 +46,16 @@ func watch() {
 	for {
 		mutex.Lock()
 		handles = handles[:0]
+		if lastFoundAt < time.Now().Unix()-1 {
+			snapshot = winapi.CreateToolhelp32Snapshot(winapi.Th32csSnapprocess, 0)
+			lastFoundAt = time.Now().Unix()
+		}
 
 		if winapi.Process32First(uintptr(snapshot), &pe32) {
 			for {
 				szExeFile = uint8ToStr(pe32.SzExeFile[:])
 
-				if strings.ToLower(szExeFile) == executeable {
+				if strings.ToLower(szExeFile) == executable {
 					winapi.EnumWindows(enumWindow, uintptr(pe32.Th32ProcessID))
 					break
 				}