sync: Add sync package

audio/audio.go

@@ -31,10 +31,10 @@ import (
 	"errors"
 	"io"
 	"runtime"
-	"sync"
 	"time"
 
 	"github.com/hajimehoshi/ebiten"
+	"github.com/hajimehoshi/ebiten/internal/sync"
 	"github.com/hajimehoshi/oto"
 )
 

internal/graphics/command.go

@@ -20,10 +20,10 @@ import (
 	"image"
 	"image/color"
 	"math"
-	"sync"
 
 	"github.com/hajimehoshi/ebiten/internal/affine"
 	"github.com/hajimehoshi/ebiten/internal/opengl"
+	"github.com/hajimehoshi/ebiten/internal/sync"
 )
 
 type command interface {

internal/loop/run.go

@@ -16,10 +16,10 @@ package loop
 
 import (
 	"errors"
-	"sync"
 	"time"
 
 	"github.com/hajimehoshi/ebiten/internal/opengl"
+	"github.com/hajimehoshi/ebiten/internal/sync"
 	"github.com/hajimehoshi/ebiten/internal/ui"
 )
 

internal/restorable/images.go

@@ -15,9 +15,8 @@
 package restorable
 
 import (
-	"sync"
-
 	"github.com/hajimehoshi/ebiten/internal/opengl"
+	"github.com/hajimehoshi/ebiten/internal/sync"
 )
 
 type images struct {

internal/sync/sync_js.go

@@ -0,0 +1,29 @@
+// Copyright 2017 The Ebiten Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build js
+
+package sync
+
+import (
+	"github.com/gopherjs/gopherjs/nosync"
+)
+
+type Mutex struct {
+	nosync.Mutex
+}
+
+type RWMutex struct {
+	nosync.RWMutex
+}

internal/sync/sync_notjs.go

@@ -0,0 +1,29 @@
+// Copyright 2017 The Ebiten Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// +build !js
+
+package sync
+
+import (
+	"sync"
+)
+
+type Mutex struct {
+	sync.Mutex
+}
+
+type RWMutex struct {
+	sync.RWMutex
+}