GoRoutineCrash.go

package main

import (
	"fmt"
	"github.com/veandco/go-sdl2/sdl"
	"math/rand"
	"os"
	"time"
)

type SDLWindow struct {
	window    *sdl.Window
	renderer  *sdl.Renderer
	rand      *rand.Rand
	terminate bool
}

func NewSDLWindow() *SDLWindow {
	window, err := sdl.CreateWindow("Ulea", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
		800, 600, sdl.WINDOW_SHOWN|sdl.WINDOW_RESIZABLE)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", err)
		return nil
	}
	renderer, err := sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
	if err != nil {
		fmt.Fprintf(os.Stderr, "Failed to create renderer: %s\n", err)
		return nil
	}
	return &SDLWindow{
		window:    window,
		renderer:  renderer,
		terminate: false,
		rand:      rand.New(rand.NewSource(0)),
	}
}

func (win *SDLWindow) draw() {
	rand := win.rand
	win.renderer.Clear()
	win.renderer.SetDrawColor(0, 0, 0, 255)
	x, y := win.window.GetSize()
	win.renderer.FillRect(&sdl.Rect{0, 0, int32(x), int32(y)})
	for i := 0; i < 100; i++ {
		win.renderer.SetDrawColor(uint8(rand.Intn(255)), uint8(rand.Intn(255)), uint8(rand.Intn(255)), 255)
		win.renderer.DrawLine(rand.Intn(x), rand.Intn(y), rand.Intn(x), rand.Intn(y))
	}
	win.renderer.Present()
}

func (win *SDLWindow) pollEvent() {
	event := sdl.PollEvent()
	for event != nil {
		switch t := event.(type) {
		case *sdl.QuitEvent:
			win.terminate = true
		case *sdl.KeyUpEvent:
			fmt.Printf("[%d ms] Keyboard\ttype:%d\tsym:%c\tmodifiers:%d\tstate:%d\trepeat:%d\n",
				t.Timestamp, t.Type, t.Keysym.Sym, t.Keysym.Mod, t.State, t.Repeat)
		default:
		}
		event = sdl.PollEvent()
	}
}

func (win *SDLWindow) Show() {
	win.draw()
	win.pollEvent()
}

func (win *SDLWindow) Destroy() {
	win.renderer.Destroy()
	win.window.Destroy()
}

func SDLMainLoop() {
	window := NewSDLWindow()
	if window == nil {
		return
	}
	for !window.terminate {
		window.Show()
		time.Sleep(10 * time.Millisecond)
	}
	window.Destroy()
}

func HelloWorld() {
	for {
		time.Sleep(1000 * time.Millisecond)
		fmt.Println("Hello world")
	}
}

func main() {
	go HelloWorld()
	SDLMainLoop()
}