Can SDL_UpdateTexture() used in a thread?

SDL Development
1

Hi all

I have an issue that SDL_UpdateTexture() in a separate thread (i.e not in main thread) and its crashes with “Segmentation fault: 11 (core dumped)” when it is executing the SDL_UpdateTexture().

GDB shows following error on the core file developed:
#0? 0x299d6669 in glGetError () from /usr/local/lib/libGL.so.1

The SDL_Window, SDL_Renderer, and SDL_Textureare created in the main thread.

In another thread, I’m attempting to display using SDL_UpdateTexture, SDL_RenderCopy, and SDL_RenderPresent. The muxtes are used to protect SDL_Window, SDL_Renderer, and SDL_Texture.

Are the SDL_UpdateTexture, SDL_RenderCopy, and SDL_RenderPresent limited to the main thread? Is there any thing required to be done to use them in a separate thread?

Many thanks in advance.

Best regards
Unga

2

Yes, they’re limited to the main thread (pretty much anything related
to rendering or event handling is). There isn’t much SDL can do to
work around this, it’s a limitation of the underlying system APIs :confused:

2013/4/17, Unga :> Hi all

I have an issue that SDL_UpdateTexture() in a separate thread (i.e not in
main thread) and its crashes with “Segmentation fault: 11 (core dumped)”
when it is executing the SDL_UpdateTexture().

GDB shows following error on the core file developed:
#0? 0x299d6669 in glGetError () from /usr/local/lib/libGL.so.1

The SDL_Window, SDL_Renderer, and SDL_Textureare created in the main thread.

In another thread, I’m attempting to display using SDL_UpdateTexture,
SDL_RenderCopy, and SDL_RenderPresent. The muxtes are used to protect
SDL_Window, SDL_Renderer, and SDL_Texture.

Are the SDL_UpdateTexture, SDL_RenderCopy, and SDL_RenderPresent limited to
the main thread? Is there any thing required to be done to use them in a
separate thread?

Many thanks in advance.

Best regards
Unga

3

Cc:

Yes, they’re limited to the main thread (pretty much anything related
to rendering or event handling is). There isn’t much SDL can do to
work around this, it’s a limitation of the underlying system APIs :confused:

IC, then will stick to the main thread. Appreciate very much your reply.

Thank you.
Unga

----- Original Message -----
From: Sik the hedgehog <sik.the.hedgehog at gmail.com>
To: Unga <@Unga>; SDL Development List
Sent: Wednesday, April 17, 2013 6:19 PM
Subject: Re: [SDL] Can SDL_UpdateTexture() used in a thread?