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0

I'm developing a screen share application and I am using a thread for receiving the data from a socket.io server, and a thread for displaying it. It works perfectly well, as long as I run it under a Linux platform.

I've tried it on my Mac, but after doing some research apparently macOS doesnt allow you to draw to threads other than the main thread, and i need it to work on all platforms.

Any help would be appreciated, thanks.

Heres what I'm currently doing (a snippet of the client code)

def socketio_task():
 """
 The task to run the socket.io client in
 """
 sio.connect('http://localhost:8080')
 sio.wait()


def gui_task():
 """
 The task to display the Pygame GUI with.
 """
 global running, image
 pygame.init()
 screen = pygame.display.set_mode((1280, 720))

 while running:
 for event in pygame.event.get():
 if event.type == pygame.QUIT:
 running = False

 if image is not None:
 try:
 screen.blit(image, (0, 0))
 except pygame.error:
 pass
 pygame.display.flip()



if __name__ == '__main__':

 # TODO: Figure out a way to fix this so that it works on all platforms
 sio.start_background_task(socketio_task)
 sio.start_background_task(gui_task)

python multithreading pygame cross-platform python-multithreading

share|improve this question

asked Mar 7 at 3:01

dhillndhilln

461

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Quasi-duplicate of stackoverflow.com/questions/54921681/… ?
  
  – Kingsley
  Mar 7 at 3:12
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Possible duplicate of pyagme screen not working with multithreading
  
  – Rabbid76
  Mar 7 at 5:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did not work when I followed those instructions, I get this on macOS: Break on __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___YOU_MUST_EXEC__() to debug. The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec(). @Kingsley
  
  – dhilln
  Mar 7 at 10:44
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Note from: developer.apple.com/library/archive/technotes/tn2083/… - "Many Mac OS X frameworks do not work reliably if you call fork but do not call exec. The only exception is the System framework and, even there, the POSIX standard places severe constraints on what you can do between a fork and an exec." Maybe find a later version of SocketIO that doesn't fork(), or use normal python threads. I don't have a Mac, so that's as far as I can answer. Maybe ask a separate question on this error + SocketIO.
  
  – Kingsley
  Mar 7 at 21:43
  

  
  
  
  

add a comment | 

0

I'm developing a screen share application and I am using a thread for receiving the data from a socket.io server, and a thread for displaying it. It works perfectly well, as long as I run it under a Linux platform.

I've tried it on my Mac, but after doing some research apparently macOS doesnt allow you to draw to threads other than the main thread, and i need it to work on all platforms.

Any help would be appreciated, thanks.

Heres what I'm currently doing (a snippet of the client code)

def socketio_task():
 """
 The task to run the socket.io client in
 """
 sio.connect('http://localhost:8080')
 sio.wait()


def gui_task():
 """
 The task to display the Pygame GUI with.
 """
 global running, image
 pygame.init()
 screen = pygame.display.set_mode((1280, 720))

 while running:
 for event in pygame.event.get():
 if event.type == pygame.QUIT:
 running = False

 if image is not None:
 try:
 screen.blit(image, (0, 0))
 except pygame.error:
 pass
 pygame.display.flip()



if __name__ == '__main__':

 # TODO: Figure out a way to fix this so that it works on all platforms
 sio.start_background_task(socketio_task)
 sio.start_background_task(gui_task)

python multithreading pygame cross-platform python-multithreading

share|improve this question

asked Mar 7 at 3:01

dhillndhilln

461

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Quasi-duplicate of stackoverflow.com/questions/54921681/… ?
  
  – Kingsley
  Mar 7 at 3:12
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Possible duplicate of pyagme screen not working with multithreading
  
  – Rabbid76
  Mar 7 at 5:48
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did not work when I followed those instructions, I get this on macOS: Break on __THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___YOU_MUST_EXEC__() to debug. The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec(). @Kingsley
  
  – dhilln
  Mar 7 at 10:44
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Note from: developer.apple.com/library/archive/technotes/tn2083/… - "Many Mac OS X frameworks do not work reliably if you call fork but do not call exec. The only exception is the System framework and, even there, the POSIX standard places severe constraints on what you can do between a fork and an exec." Maybe find a later version of SocketIO that doesn't fork(), or use normal python threads. I don't have a Mac, so that's as far as I can answer. Maybe ask a separate question on this error + SocketIO.
  
  – Kingsley
  Mar 7 at 21:43
  

  
  
  
  

add a comment | 

I'm developing a screen share application and I am using a thread for receiving the data from a socket.io server, and a thread for displaying it. It works perfectly well, as long as I run it under a Linux platform.

I've tried it on my Mac, but after doing some research apparently macOS doesnt allow you to draw to threads other than the main thread, and i need it to work on all platforms.

Any help would be appreciated, thanks.

Heres what I'm currently doing (a snippet of the client code)

def socketio_task():
 """
 The task to run the socket.io client in
 """
 sio.connect('http://localhost:8080')
 sio.wait()


def gui_task():
 """
 The task to display the Pygame GUI with.
 """
 global running, image
 pygame.init()
 screen = pygame.display.set_mode((1280, 720))

 while running:
 for event in pygame.event.get():
 if event.type == pygame.QUIT:
 running = False

 if image is not None:
 try:
 screen.blit(image, (0, 0))
 except pygame.error:
 pass
 pygame.display.flip()



if __name__ == '__main__':

 # TODO: Figure out a way to fix this so that it works on all platforms
 sio.start_background_task(socketio_task)
 sio.start_background_task(gui_task)

python multithreading pygame cross-platform python-multithreading

share|improve this question

asked Mar 7 at 3:01

dhillndhilln

461

def socketio_task():
 """
 The task to run the socket.io client in
 """
 sio.connect('http://localhost:8080')
 sio.wait()


def gui_task():
 """
 The task to display the Pygame GUI with.
 """
 global running, image
 pygame.init()
 screen = pygame.display.set_mode((1280, 720))

 while running:
 for event in pygame.event.get():
 if event.type == pygame.QUIT:
 running = False

 if image is not None:
 try:
 screen.blit(image, (0, 0))
 except pygame.error:
 pass
 pygame.display.flip()



if __name__ == '__main__':

 # TODO: Figure out a way to fix this so that it works on all platforms
 sio.start_background_task(socketio_task)
 sio.start_background_task(gui_task)

share|improve this question

asked Mar 7 at 3:01

dhillndhilln

461

share|improve this question

asked Mar 7 at 3:01

dhillndhilln

461

asked Mar 7 at 3:01

dhillndhilln

461

asked Mar 7 at 3:01

dhillndhilln

461