First Commit

externals/sdl2/SDL/test/torturethread.c

@@ -0,0 +1,113 @@
+/*
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely.
+*/
+
+/* Simple test of the SDL threading code */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <string.h>
+
+#include "SDL.h"
+
+#define NUMTHREADS 10
+
+static SDL_atomic_t time_for_threads_to_die[NUMTHREADS];
+
+/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
+static void
+quit(int rc)
+{
+    SDL_Quit();
+    exit(rc);
+}
+
+int SDLCALL
+SubThreadFunc(void *data)
+{
+    while (!*(int volatile *) data) {
+        ;                       /* SDL_Delay(10); *//* do nothing */
+    }
+    return 0;
+}
+
+int SDLCALL
+ThreadFunc(void *data)
+{
+    SDL_Thread *sub_threads[NUMTHREADS];
+    int flags[NUMTHREADS];
+    int i;
+    int tid = (int) (uintptr_t) data;
+
+    SDL_Log("Creating Thread %d\n", tid);
+
+    for (i = 0; i < NUMTHREADS; i++) {
+        char name[64];
+        SDL_snprintf(name, sizeof (name), "Child%d_%d", tid, i);
+        flags[i] = 0;
+        sub_threads[i] = SDL_CreateThread(SubThreadFunc, name, &flags[i]);
+    }
+
+    SDL_Log("Thread '%d' waiting for signal\n", tid);
+    while (SDL_AtomicGet(&time_for_threads_to_die[tid]) != 1) {
+        ;                       /* do nothing */
+    }
+
+    SDL_Log("Thread '%d' sending signals to subthreads\n", tid);
+    for (i = 0; i < NUMTHREADS; i++) {
+        flags[i] = 1;
+        SDL_WaitThread(sub_threads[i], NULL);
+    }
+
+    SDL_Log("Thread '%d' exiting!\n", tid);
+
+    return 0;
+}
+
+int
+main(int argc, char *argv[])
+{
+    SDL_Thread *threads[NUMTHREADS];
+    int i;
+
+    /* Enable standard application logging */
+    SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
+
+    /* Load the SDL library */
+    if (SDL_Init(0) < 0) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
+        return (1);
+    }
+
+    signal(SIGSEGV, SIG_DFL);
+    for (i = 0; i < NUMTHREADS; i++) {
+        char name[64];
+        SDL_snprintf(name, sizeof (name), "Parent%d", i);
+        SDL_AtomicSet(&time_for_threads_to_die[i], 0);
+        threads[i] = SDL_CreateThread(ThreadFunc, name, (void*) (uintptr_t) i);
+
+        if (threads[i] == NULL) {
+            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread: %s\n", SDL_GetError());
+            quit(1);
+        }
+    }
+
+    for (i = 0; i < NUMTHREADS; i++) {
+        SDL_AtomicSet(&time_for_threads_to_die[i], 1);
+    }
+
+    for (i = 0; i < NUMTHREADS; i++) {
+        SDL_WaitThread(threads[i], NULL);
+    }
+    SDL_Quit();
+    return (0);
+}