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3ef1d04935
In `internal/uidriver/glfw/run_notsinglethread.go`, if the `UserInterface.init()` function returns an error, the `loop` is
executed regardless and the error is discarded. This behavior will hide the error returned by `init()` and might trigger
some crashes (see #1688).
A partial fix was implemented in 6c4edf8 , however that commit alone is not enough: the code now is correctly returning
the error via the `ch` channel, but it still executes the `loop()` function. This merge request skips `loop()` call if `init()`
had an error.
Updates #1688
93 lines
2.4 KiB
Go
93 lines
2.4 KiB
Go
// Copyright 2020 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build !ebitensinglethread && (darwin || freebsd || linux || windows) && !android && !ios
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// +build !ebitensinglethread
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// +build darwin freebsd linux windows
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// +build !android
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// +build !ios
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package glfw
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import (
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"github.com/hajimehoshi/ebiten/v2/internal/driver"
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"github.com/hajimehoshi/ebiten/v2/internal/graphicscommand"
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"github.com/hajimehoshi/ebiten/v2/internal/thread"
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)
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func (u *UserInterface) Run(uicontext driver.UIContext) error {
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u.context = uicontext
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// Initialize the main thread first so the thread is available at u.run (#809).
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u.t = thread.NewOSThread()
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graphicscommand.SetMainThread(u.t)
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ch := make(chan error, 1)
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go func() {
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defer func() {
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_ = u.t.Call(func() error {
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return thread.BreakLoop
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})
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}()
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defer close(ch)
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if err := u.t.Call(func() error {
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return u.init()
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}); err != nil {
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ch <- err
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return
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}
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if err := u.loop(); err != nil {
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ch <- err
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return
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}
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}()
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u.setRunning(true)
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u.t.Loop()
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u.setRunning(false)
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return <-ch
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}
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// runOnAnotherThreadFromMainThread is called from the main thread, and calls f on a new goroutine (thread).
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// runOnAnotherThreadFromMainThread creates a new nested main thread and runs the run loop.
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// u.t is updated to the new thread until runOnAnotherThreadFromMainThread is called.
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//
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// Inside f, another functions that must be called from the main thread can be called safely.
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func (u *UserInterface) runOnAnotherThreadFromMainThread(f func() error) error {
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// As this function is called from the main thread, u.t should never be accessed and can be updated here.
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t := u.t
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defer func() {
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u.t = t
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graphicscommand.SetMainThread(t)
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}()
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u.t = thread.NewOSThread()
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graphicscommand.SetMainThread(u.t)
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var err error
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go func() {
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defer func() {
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_ = u.t.Call(func() error {
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return thread.BreakLoop
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})
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}()
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err = f()
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}()
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u.t.Loop()
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return err
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}
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