testatomic: destroy threads + free all memory at quit to fix --trackmem

test/testatomic.c

@@ -128,7 +128,8 @@ static int SDLCALL adder(void *junk)
 static void runAdder(void)
 {
     Uint64 start, end;
-    int T = NThreads;
+    int i;
+    SDL_Thread *threads[NThreads];
 
     start = SDL_GetTicksNS();
 
@@ -136,14 +137,18 @@ static void runAdder(void)
 
     SDL_AtomicSet(&threadsRunning, NThreads);
 
-    while (T--) {
-        SDL_CreateThread(adder, "Adder", NULL);
+    for (i = 0; i < NThreads; i++) {
+        threads[i] = SDL_CreateThread(adder, "Adder", NULL);
     }
 
     while (SDL_AtomicGet(&threadsRunning) > 0) {
         SDL_WaitSemaphore(threadDone);
     }
 
+    for (i = 0; i < NThreads; i++) {
+        SDL_WaitThread(threads[i], NULL);
+    }
+
     SDL_DestroySemaphore(threadDone);
 
     end = SDL_GetTicksNS();
@@ -726,6 +731,7 @@ int main(int argc, char *argv[])
     RunFIFOTest(SDL_FALSE);
 #endif
     RunFIFOTest(SDL_TRUE);
+    SDL_Quit();
     SDLTest_CommonDestroyState(state);
     return 0;
 }