Provided by: libsdl3-doc_3.2.26+ds-2_all 

NAME
SDL_GetThreadID - Get the thread identifier for the specified thread.
SYNOPSIS
#include <SDL3/SDL_thread.h>
SDL_ThreadID SDL_GetThreadID(SDL_Thread *thread);
DESCRIPTION
This thread identifier is as reported by the underlying operating system. If SDL is running on a platform
that does not support threads the return value will always be zero.
FUNCTION PARAMETERS
thread the thread to query.
RETURN VALUE
Returns the ID of the specified thread, or the ID of the current thread if thread is NULL.
AVAILABILITY
This function is available since SDL 3.2.0.
SEE ALSO
SDL_GetCurrentThreadID(3)
Simple Directmedia Layer SDL 3.2.26 SDL_GetThreadID(3)