ebiten/internal/graphicscommand/thread.go
2021-02-07 23:03:56 +09:00

37 lines
1.2 KiB
Go

// Copyright 2020 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.
package graphicscommand
var theThread Thread
type Thread interface {
Call(f func() error) error
}
// SetMainThread must be called from the main thread (i.e, the goroutine where the thread is created).
func SetMainThread(thread Thread) {
theThread = thread
}
func runOnMainThread(f func() error) error {
// The thread is nil when 1) GOOS=js or 2) using golang.org/x/mobile/gl.
// When golang.org/x/mobile/gl is used, all the GL functions are called via Context, which already runs on an
// appropriate thread.
if theThread == nil {
return f()
}
return theThread.Call(f)
}