SDL_SetAssertionHandler(3)

SDL_SetAssertionHandler3

Set an application-defined assertion handler.

Usage

#include "SDL3/SDL.h"

void SDL_SetAssertionHandler( SDL_AssertionHandler handler, void *userdata);

Header file

Defined in SDL3/SDL_assert.h

Overview

This function allows an application to show its own assertion UI and/or force the response to an assertion failure. If the application doesn't provide this, SDL will try to do the right thing, popping up a system-specific GUI dialog, and probably minimizing any fullscreen windows.

This callback may fire from any thread, but it runs wrapped in a mutex, so it will only fire from one thread at a time.

This callback is NOT reset to SDL's internal handler upon

SDL_Quit ()!

Function parameters

handler

the SDL_AssertionHandler
function to call when an assertion fails or NULL for the default handler.

userdata

a pointer that is passed to handler .

Thread safety

It is safe to call this function from any thread.

Availability

This function is available since SDL 3.2.0.

From libsdl3-doc 3.2.10+ds-1 in Debian 13 (Trixie). Parsed by carta from the page's man source.