Use runtime.LockOSThread at main

example/main.go

@@ -24,6 +24,7 @@ type Game interface {
 
 func main() {
 	runtime.GOMAXPROCS(runtime.NumCPU())
+	runtime.LockOSThread()
 
 	gameName := ""
 	if 2 <= len(os.Args) {

ui/cocoa/cocoa.go

@@ -19,14 +19,9 @@ import (
 	"github.com/hajimehoshi/go-ebiten/graphics"
 	"github.com/hajimehoshi/go-ebiten/graphics/opengl"
 	"github.com/hajimehoshi/go-ebiten/ui"
-	"runtime"
 	"unsafe"
 )
 
-func init() {
-	runtime.LockOSThread()
-}
-
 type UI struct {
 	screenWidth       int
 	screenHeight      int
@@ -87,7 +82,7 @@ func (u *UI) LoadTextures(map[int]string) {
 
 func (u *UI) LoadResources(f func(graphics.TextureFactory)) {
 	C.BeginDrawing(u.window)
-	f(u.graphicsDevice.TextureFactory())
+	f(u.graphicsDevice)
 	C.EndDrawing(u.window)
 }