SDL_Mutex3type
A means to serialize access to a resource between threads.
Usage
#include "SDL3/SDL.h"
typedef struct SDL_Mutex SDL_Mutex;
Header file
Defined in SDL3/SDL_mutex.h
Overview
Mutexes (short for "mutual exclusion") are a synchronization primitive that allows exactly one thread to proceed at a time.
Wikipedia has a thorough explanation of the concept:
https://en.wikipedia.org/wiki/Mutex