Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_Mutex - A means to serialize access to a resource between threads.
SYNOPSIS
#include <SDL3/SDL_mutex.h>
typedef struct SDL_Mutex SDL_Mutex;
DESCRIPTION
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
AVAILABILITY
This struct is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.20 SDL_Mutex(3type)