SDL_GetThreadID
Use this function to get the thread identifier for the specified thread.
Contents
Syntax
SDL_threadID SDL_GetThreadID(SDL_Thread* thread)
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.
Code Examples
#include <stdio.h>
#include "SDL.h"
// Very simple thread - counts 0 to 9 delaying 50ms between increments
int TestThread(void *ptr)
{
    int cnt;
    for (cnt = 0; cnt < 10; ++cnt) {
        printf("\nThread counter: %d", cnt);
        SDL_Delay(50);
    }
    return cnt;
}
int main(int argc, char *argv[])
{
    SDL_Thread   *thread;
    SDL_threadID threadID;
    int          threadReturnValue;
    printf("\nSimple SDL_CreateThread test:");
    /* Simply create a thread */
    thread = SDL_CreateThread(TestThread, "TestThread", (void *)NULL);
    if (NULL == thread) {
        printf("\nSDL_CreateThread failed: %s\n", SDL_GetError());
        exit(-1);
    }
    /* Retrieve the ID for the newly launched thread */
    threadID = SDL_GetThreadID(thread);
    /* Wait for the thread to complete and get the return code */
    SDL_WaitThread(thread, &threadReturnValue);
    printf("\nThread returned value: %d", threadReturnValue);
    return 0;
}
Remarks
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.




