Is GLUT multitasking?

Question

C++ / C#

I am learning the GLUT library. Does GLUT give the impression that rendering and events work in parallel, creating multitasking?

Answer 1

No, but you can share it yourself. There everything is in one cycle, first input, and then TimerFunc. The input is fast, so it's invisible.
Test code

#include<glut.h>

void Keyboard(unsigned char key, int x, int y)
{
  while (true);
}
float angle = 0;
void Draw()
{
  angle++;
  glLoadIdentity();
  glRotatef(angle, 0,0,1);
  glClear(GL_COLOR_BUFFER_BIT);
  glBegin(GL_LINES);
    glVertex3f(1, 1, 0);
    glVertex3f(-1, -1, 0);
  glEnd();
  glFlush();
}
void Time(int)
{	
  Draw();
  glutTimerFunc(0,Time,50);
}
void Init()
{	
  glClearColor(1.0,1.0,1.0,0.0);  
  glColor3f(0,0,0);
  glOrtho(0.0,1,0.0,1, 1,-1); 
}

int main(int argv, char** argc)
{	
  glutInit(&argv, argc);
  glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB); 
  glutInitWindowPosition(200,200);
  glutInitWindowSize(400,400);
  glutCreateWindow("hello");
  Init();
  glutKeyboardFunc(Keyboard);
  glutDisplayFunc(Draw);
  glutTimerFunc(0,Time,50);
  glutMainLoop();
}