Introduce Context.WithLock

Context.go

@@ -214,6 +214,12 @@
 	return nil
 }
 
+func (c *GIUContext) WithLock(fn func()) {
+	c.m.Lock()
+	defer c.m.Unlock()
+	fn()
+}
+
 func (c *GIUContext) load(id any) (*state, bool) {
 	if v, ok := c.state.Load(id); ok {
 		if s, ok := v.(*state); ok {

MasterWindow.go

@@ -205,23 +205,25 @@ func (w *MasterWindow) beforeRender() {
 
 	Context.FontAtlas.rebuildFontAtlas()
 
-	// process texture load requests
-	if Context.textureLoadingQueue != nil && Context.textureLoadingQueue.Length() > 0 {
-		for Context.textureLoadingQueue.Length() > 0 {
-			request, ok := Context.textureLoadingQueue.Remove().(textureLoadRequest)
-			Assert(ok, "MasterWindow", "Run", "processing texture requests: wrong type of texture request")
-			NewTextureFromRgba(request.img, request.cb)
+	Context.WithLock(func() {
+		// process texture load requests
+		if Context.textureLoadingQueue != nil && Context.textureLoadingQueue.Length() > 0 {
+			for Context.textureLoadingQueue.Length() > 0 {
+				request, ok := Context.textureLoadingQueue.Remove().(textureLoadRequest)
+				Assert(ok, "MasterWindow", "Run", "processing texture requests: wrong type of texture request")
+				NewTextureFromRgba(request.img, request.cb)
+			}
 		}
-	}
 
-	// process texture free requests
-	if Context.textureFreeingQueue != nil && Context.textureFreeingQueue.Length() > 0 {
-		for Context.textureFreeingQueue.Length() > 0 {
-			request, ok := Context.textureFreeingQueue.Remove().(textureFreeRequest)
-			Assert(ok, "MasterWindow", "Run", "processing texture requests: wrong type of texture request")
-			request.tex.tex.Release()
+		// process texture free requests
+		if Context.textureFreeingQueue != nil && Context.textureFreeingQueue.Length() > 0 {
+			for Context.textureFreeingQueue.Length() > 0 {
+				request, ok := Context.textureFreeingQueue.Remove().(textureFreeRequest)
+				Assert(ok, "MasterWindow", "Run", "processing texture requests: wrong type of texture request")
+				request.tex.tex.Release()
+			}
 		}
-	}
+	})
 }
 
 func (w *MasterWindow) afterRender() {

Texture.go

@@ -28,7 +28,9 @@ type textureFreeRequest struct {
 // NOTE: remember to call it after NewMasterWindow!
 func EnqueueNewTextureFromRgba(rgba image.Image, loadCb func(t *Texture)) {
 	Assert((Context.textureLoadingQueue != nil), "", "EnqueueNewTextureFromRgba", "you need to call EnqueueNewTextureFromRgba after giu.NewMasterWindow call!")
-	Context.textureLoadingQueue.Add(textureLoadRequest{rgba, loadCb})
+	Context.WithLock(func() {
+		Context.textureLoadingQueue.Add(textureLoadRequest{rgba, loadCb})
+	})
 }
 
 // NewTextureFromRgba creates a new texture from image.Image and, when it is done, calls loadCallback(loadedTexture).
@@ -39,7 +41,9 @@ func NewTextureFromRgba(rgba image.Image, loadCallback func(*Texture)) {
 	}
 
 	runtime.SetFinalizer(giuTex, func(tex *Texture) {
-		Context.textureFreeingQueue.Add(textureFreeRequest{tex})
+		Context.WithLock(func() {
+			Context.textureFreeingQueue.Add(textureFreeRequest{tex})
+		})
 	})
 
 	loadCallback(giuTex)