1 files changed, 212 insertions, 0 deletions

diff --git a/src/contrib/SDL-3.2.20/test/testlock.c b/src/contrib/SDL-3.2.20/test/testlock.c
new file mode 100644
index 0000000..971b303
--- /dev/null
+++ b/src/contrib/SDL-3.2.20/test/testlock.c
@@ -0,0 +1,212 @@
+/*
+  Copyright (C) 1997-2025 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.
+*/
+
+/* Test the thread and mutex locking functions
+   Also exercises the system's signal/thread interaction
+*/
+
+#include <signal.h>
+#include <stdlib.h> /* for atexit() */
+
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+#include <SDL3/SDL_test.h>
+
+static SDL_Mutex *mutex = NULL;
+static SDL_ThreadID mainthread;
+static SDL_AtomicInt doterminate;
+static int nb_threads = 6;
+static SDL_Thread **threads;
+static int worktime = 1000;
+static SDLTest_CommonState *state;
+
+/**
+ * SDL_Quit() shouldn't be used with atexit() directly because
+ * calling conventions may differ...
+ */
+static void
+SDL_Quit_Wrapper(void)
+{
+    SDL_Quit();
+    SDLTest_CommonDestroyState(state);
+}
+
+static void printid(void)
+{
+    SDL_Log("Thread %" SDL_PRIu64 ":  exiting", SDL_GetCurrentThreadID());
+}
+
+static void terminate(int sig)
+{
+    (void)signal(SIGINT, terminate);
+    SDL_SetAtomicInt(&doterminate, 1);
+}
+
+static void closemutex(int sig)
+{
+    SDL_ThreadID id = SDL_GetCurrentThreadID();
+    int i;
+    SDL_Log("Thread %" SDL_PRIu64 ":  Cleaning up...", id == mainthread ? 0 : id);
+    SDL_SetAtomicInt(&doterminate, 1);
+    if (threads) {
+        for (i = 0; i < nb_threads; ++i) {
+            SDL_WaitThread(threads[i], NULL);
+        }
+        SDL_free(threads);
+        threads = NULL;
+    }
+    SDL_DestroyMutex(mutex);
+    /* Let 'main()' return normally */
+    if (sig != 0) {
+        exit(sig);
+    }
+}
+
+static int SDLCALL
+Run(void *data)
+{
+    SDL_ThreadID current_thread = SDL_GetCurrentThreadID();
+
+    if (current_thread == mainthread) {
+        (void)signal(SIGTERM, closemutex);
+    }
+    SDL_Log("Thread %" SDL_PRIu64 ": starting up", current_thread);
+    while (!SDL_GetAtomicInt(&doterminate)) {
+        SDL_Log("Thread %" SDL_PRIu64 ": ready to work", current_thread);
+        SDL_LockMutex(mutex);
+        SDL_Log("Thread %" SDL_PRIu64 ": start work!", current_thread);
+        SDL_Delay(1 * worktime);
+        SDL_Log("Thread %" SDL_PRIu64 ": work done!", current_thread);
+        SDL_UnlockMutex(mutex);
+
+        /* If this sleep isn't done, then threads may starve */
+        SDL_Delay(10);
+    }
+    if (current_thread == mainthread && SDL_GetAtomicInt(&doterminate)) {
+        SDL_Log("Thread %" SDL_PRIu64 ": raising SIGTERM", current_thread);
+        (void)raise(SIGTERM);
+    }
+    SDL_Log("Thread %" SDL_PRIu64 ": exiting!", current_thread);
+    return 0;
+}
+
+#ifndef _WIN32
+static Uint32 hit_timeout(void *param, SDL_TimerID timerID, Uint32 interval) {
+    SDL_Log("Hit timeout! Sending SIGINT!");
+    (void)raise(SIGINT);
+    return 0;
+}
+#endif
+
+int main(int argc, char *argv[])
+{
+    int i;
+#ifndef _WIN32
+    int timeout = 0;
+#endif
+
+    /* Initialize test framework */
+    state = SDLTest_CommonCreateState(argv, 0);
+    if (!state) {
+        return 1;
+    }
+
+    /* Parse commandline */
+    for (i = 1; i < argc;) {
+        int consumed;
+
+        consumed = SDLTest_CommonArg(state, i);
+        if (!consumed) {
+            if (SDL_strcmp(argv[i], "--nbthreads") == 0) {
+                if (argv[i + 1]) {
+                    char *endptr;
+                    nb_threads = SDL_strtol(argv[i + 1], &endptr, 0);
+                    if (endptr != argv[i + 1] && *endptr == '\0' && nb_threads > 0) {
+                        consumed = 2;
+                    }
+                }
+            } else if (SDL_strcmp(argv[i], "--worktime") == 0) {
+                if (argv[i + 1]) {
+                    char *endptr;
+                    nb_threads = SDL_strtol(argv[i + 1], &endptr, 0);
+                    if (endptr != argv[i + 1] && *endptr == '\0' && nb_threads > 0) {
+                        consumed = 2;
+                    }
+                }
+#ifndef _WIN32
+            } else if (SDL_strcmp(argv[i], "--timeout") == 0) {
+                if (argv[i + 1]) {
+                    char *endptr;
+                    timeout = SDL_strtol(argv[i + 1], &endptr, 0);
+                    if (endptr != argv[i + 1] && *endptr == '\0' && timeout > 0) {
+                        consumed = 2;
+                    }
+                }
+#endif
+            }
+        }
+        if (consumed <= 0) {
+            static const char *options[] = {
+                "[--nbthreads NB]",
+                "[--worktime ms]",
+#ifndef _WIN32
+                "[--timeout ms]",
+#endif
+                NULL,
+            };
+            SDLTest_CommonLogUsage(state, argv[0], options);
+            exit(1);
+        }
+
+        i += consumed;
+    }
+
+    threads = SDL_malloc(nb_threads * sizeof(SDL_Thread*));
+
+    /* Load the SDL library */
+    if (!SDL_Init(0)) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "%s", SDL_GetError());
+        exit(1);
+    }
+    (void)atexit(SDL_Quit_Wrapper);
+
+    SDL_SetAtomicInt(&doterminate, 0);
+
+    mutex = SDL_CreateMutex();
+    if (!mutex) {
+        SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create mutex: %s", SDL_GetError());
+        exit(1);
+    }
+
+    mainthread = SDL_GetCurrentThreadID();
+    SDL_Log("Main thread: %" SDL_PRIu64, mainthread);
+    (void)atexit(printid);
+    for (i = 0; i < nb_threads; ++i) {
+        char name[64];
+        (void)SDL_snprintf(name, sizeof(name), "Worker%d", i);
+        threads[i] = SDL_CreateThread(Run, name, NULL);
+        if (threads[i] == NULL) {
+            SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create thread!");
+        }
+    }
+
+#ifndef _WIN32
+    if (timeout) {
+        SDL_AddTimer(timeout, hit_timeout, NULL);
+    }
+#endif
+
+    (void)signal(SIGINT, terminate);
+    Run(NULL);
+
+    return 0; /* Never reached */
+}