SDL_ThreadID (3) - Linux Manuals
SDL_ThreadID: Get the 32-bit thread identifier for the current thread.
Command to display SDL_ThreadID manual in Linux: $ man 3 SDL_ThreadID
NAME
SDL_ThreadID - Get the 32-bit thread identifier for the current thread.
SYNOPSIS
#include "SDL.h"
#include "SDL_thread.h"
Uint32 SDL_ThreadID(void)
DESCRIPTION
Get the 32-bit thread identifier for the current thread.
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