1 files changed, 764 insertions, 0 deletions

diff --git a/src/contrib/SDL-3.2.20/test/testatomic.c b/src/contrib/SDL-3.2.20/test/testatomic.c
new file mode 100644
index 0000000..3769534
--- /dev/null
+++ b/src/contrib/SDL-3.2.20/test/testatomic.c
@@ -0,0 +1,764 @@
+/*
+  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.
+*/
+
+#include <SDL3/SDL.h>
+#include <SDL3/SDL_main.h>
+#include <SDL3/SDL_test.h>
+
+/*
+  Absolutely basic tests just to see if we get the expected value
+  after calling each function.
+*/
+
+static const char *
+tf(bool _tf)
+{
+    static const char *t = "TRUE";
+    static const char *f = "FALSE";
+
+    if (_tf) {
+        return t;
+    }
+
+    return f;
+}
+
+static void RunBasicTest(void)
+{
+    int value;
+    SDL_SpinLock lock = 0;
+
+    SDL_AtomicInt v;
+    bool tfret = false;
+
+    SDL_Log("%s", "");
+    SDL_Log("spin lock---------------------------------------");
+    SDL_Log("%s", "");
+
+    SDL_LockSpinlock(&lock);
+    SDL_Log("AtomicLock                   lock=%d", lock);
+    SDL_UnlockSpinlock(&lock);
+    SDL_Log("AtomicUnlock                 lock=%d", lock);
+
+    SDL_Log("%s", "");
+    SDL_Log("atomic -----------------------------------------");
+    SDL_Log("%s", "");
+
+    SDL_SetAtomicInt(&v, 0);
+    tfret = SDL_SetAtomicInt(&v, 10) == 0;
+    SDL_Log("AtomicSet(10)        tfret=%s val=%d", tf(tfret), SDL_GetAtomicInt(&v));
+    tfret = SDL_AddAtomicInt(&v, 10) == 10;
+    SDL_Log("AtomicAdd(10)        tfret=%s val=%d", tf(tfret), SDL_GetAtomicInt(&v));
+
+    SDL_SetAtomicInt(&v, 0);
+    SDL_AtomicIncRef(&v);
+    tfret = (SDL_GetAtomicInt(&v) == 1);
+    SDL_Log("AtomicIncRef()       tfret=%s val=%d", tf(tfret), SDL_GetAtomicInt(&v));
+    SDL_AtomicIncRef(&v);
+    tfret = (SDL_GetAtomicInt(&v) == 2);
+    SDL_Log("AtomicIncRef()       tfret=%s val=%d", tf(tfret), SDL_GetAtomicInt(&v));
+    tfret = (SDL_AtomicDecRef(&v) == false);
+    SDL_Log("AtomicDecRef()       tfret=%s val=%d", tf(tfret), SDL_GetAtomicInt(&v));
+    tfret = (SDL_AtomicDecRef(&v) == true);
+    SDL_Log("AtomicDecRef()       tfret=%s val=%d", tf(tfret), SDL_GetAtomicInt(&v));
+
+    SDL_SetAtomicInt(&v, 10);
+    tfret = (SDL_CompareAndSwapAtomicInt(&v, 0, 20) == false);
+    SDL_Log("AtomicCAS()          tfret=%s val=%d", tf(tfret), SDL_GetAtomicInt(&v));
+    value = SDL_GetAtomicInt(&v);
+    tfret = (SDL_CompareAndSwapAtomicInt(&v, value, 20) == true);
+    SDL_Log("AtomicCAS()          tfret=%s val=%d", tf(tfret), SDL_GetAtomicInt(&v));
+}
+
+/**************************************************************************/
+/* Atomic operation test
+ * Adapted with permission from code by Michael Davidsaver at:
+ *  http://bazaar.launchpad.net/~mdavidsaver/epics-base/atomic/revision/12105#src/libCom/test/epicsAtomicTest.c
+ * Original copyright 2010 Brookhaven Science Associates as operator of Brookhaven National Lab
+ * http://www.aps.anl.gov/epics/license/open.php
+ */
+
+/* Tests semantics of atomic operations.  Also a stress test
+ * to see if they are really atomic.
+ *
+ * Several threads adding to the same variable.
+ * at the end the value is compared with the expected
+ * and with a non-atomic counter.
+ */
+
+/* Number of concurrent incrementers */
+#define NThreads 2
+#define CountInc 100
+#define VALBITS  (sizeof(atomicValue) * 8)
+
+#define atomicValue int
+#define CountTo     ((atomicValue)((unsigned int)(1 << (VALBITS - 1)) - 1))
+#define NInter      (CountTo / CountInc / NThreads)
+#define Expect      (CountTo - NInter * CountInc * NThreads)
+
+enum
+{
+    CountTo_GreaterThanZero = CountTo > 0,
+};
+SDL_COMPILE_TIME_ASSERT(size, CountTo_GreaterThanZero); /* check for rollover */
+
+static SDL_AtomicInt good = { 42 };
+static atomicValue bad = 42;
+static SDL_AtomicInt threadsRunning;
+static SDL_Semaphore *threadDone;
+
+static int SDLCALL adder(void *junk)
+{
+    unsigned long N = NInter;
+    SDL_Log("Thread subtracting %d %lu times", CountInc, N);
+    while (N--) {
+        SDL_AddAtomicInt(&good, -CountInc);
+        bad -= CountInc;
+    }
+    SDL_AddAtomicInt(&threadsRunning, -1);
+    SDL_SignalSemaphore(threadDone);
+    return 0;
+}
+
+static void runAdder(void)
+{
+    Uint64 start, end;
+    int i;
+    SDL_Thread *threads[NThreads];
+
+    start = SDL_GetTicksNS();
+
+    threadDone = SDL_CreateSemaphore(0);
+
+    SDL_SetAtomicInt(&threadsRunning, NThreads);
+
+    for (i = 0; i < NThreads; i++) {
+        threads[i] = SDL_CreateThread(adder, "Adder", NULL);
+    }
+
+    while (SDL_GetAtomicInt(&threadsRunning) > 0) {
+        SDL_WaitSemaphore(threadDone);
+    }
+
+    for (i = 0; i < NThreads; i++) {
+        SDL_WaitThread(threads[i], NULL);
+    }
+
+    SDL_DestroySemaphore(threadDone);
+
+    end = SDL_GetTicksNS();
+
+    SDL_Log("Finished in %f sec", (end - start) / 1000000000.0);
+}
+
+static void RunEpicTest(void)
+{
+    int b;
+    atomicValue v;
+
+    SDL_Log("%s", "");
+    SDL_Log("epic test---------------------------------------");
+    SDL_Log("%s", "");
+
+    SDL_Log("Size asserted to be >= 32-bit");
+    SDL_assert(sizeof(atomicValue) >= 4);
+
+    SDL_Log("Check static initializer");
+    v = SDL_GetAtomicInt(&good);
+    SDL_assert(v == 42);
+
+    SDL_assert(bad == 42);
+
+    SDL_Log("Test negative values");
+    SDL_SetAtomicInt(&good, -5);
+    v = SDL_GetAtomicInt(&good);
+    SDL_assert(v == -5);
+
+    SDL_Log("Verify maximum value");
+    SDL_SetAtomicInt(&good, CountTo);
+    v = SDL_GetAtomicInt(&good);
+    SDL_assert(v == CountTo);
+
+    SDL_Log("Test compare and exchange");
+
+    b = SDL_CompareAndSwapAtomicInt(&good, 500, 43);
+    SDL_assert(!b); /* no swap since CountTo!=500 */
+    v = SDL_GetAtomicInt(&good);
+    SDL_assert(v == CountTo); /* ensure no swap */
+
+    b = SDL_CompareAndSwapAtomicInt(&good, CountTo, 44);
+    SDL_assert(!!b); /* will swap */
+    v = SDL_GetAtomicInt(&good);
+    SDL_assert(v == 44);
+
+    SDL_Log("Test Add");
+
+    v = SDL_AddAtomicInt(&good, 1);
+    SDL_assert(v == 44);
+    v = SDL_GetAtomicInt(&good);
+    SDL_assert(v == 45);
+
+    v = SDL_AddAtomicInt(&good, 10);
+    SDL_assert(v == 45);
+    v = SDL_GetAtomicInt(&good);
+    SDL_assert(v == 55);
+
+    SDL_Log("Test Add (Negative values)");
+
+    v = SDL_AddAtomicInt(&good, -20);
+    SDL_assert(v == 55);
+    v = SDL_GetAtomicInt(&good);
+    SDL_assert(v == 35);
+
+    v = SDL_AddAtomicInt(&good, -50); /* crossing zero down */
+    SDL_assert(v == 35);
+    v = SDL_GetAtomicInt(&good);
+    SDL_assert(v == -15);
+
+    v = SDL_AddAtomicInt(&good, 30); /* crossing zero up */
+    SDL_assert(v == -15);
+    v = SDL_GetAtomicInt(&good);
+    SDL_assert(v == 15);
+
+    SDL_Log("Reset before count down test");
+    SDL_SetAtomicInt(&good, CountTo);
+    v = SDL_GetAtomicInt(&good);
+    SDL_assert(v == CountTo);
+
+    bad = CountTo;
+    SDL_assert(bad == CountTo);
+
+    SDL_Log("Counting down from %d, Expect %d remaining", CountTo, Expect);
+    runAdder();
+
+    v = SDL_GetAtomicInt(&good);
+    SDL_Log("Atomic %d Non-Atomic %d", v, bad);
+    SDL_assert(v == Expect);
+    /* We can't guarantee that bad != Expect, this would happen on a single core system, for example. */
+    /*SDL_assert(bad != Expect);*/
+}
+
+/* End atomic operation test */
+/**************************************************************************/
+
+/**************************************************************************/
+/* Lock-free FIFO test */
+
+/* This is useful to test the impact of another thread locking the queue
+   entirely for heavy-weight manipulation.
+ */
+#define TEST_SPINLOCK_FIFO
+
+#define NUM_READERS       4
+#define NUM_WRITERS       4
+#define EVENTS_PER_WRITER 1000000
+
+/* The number of entries must be a power of 2 */
+#define MAX_ENTRIES 256
+#define WRAP_MASK   (MAX_ENTRIES - 1)
+
+typedef struct
+{
+    SDL_AtomicInt sequence;
+    SDL_Event event;
+} SDL_EventQueueEntry;
+
+typedef struct
+{
+    SDL_EventQueueEntry entries[MAX_ENTRIES];
+
+    char cache_pad1[SDL_CACHELINE_SIZE - ((sizeof(SDL_EventQueueEntry) * MAX_ENTRIES) % SDL_CACHELINE_SIZE)];
+
+    SDL_AtomicInt enqueue_pos;
+
+    char cache_pad2[SDL_CACHELINE_SIZE - sizeof(SDL_AtomicInt)];
+
+    SDL_AtomicInt dequeue_pos;
+
+    char cache_pad3[SDL_CACHELINE_SIZE - sizeof(SDL_AtomicInt)];
+
+#ifdef TEST_SPINLOCK_FIFO
+    SDL_SpinLock lock;
+    SDL_AtomicInt rwcount;
+    SDL_AtomicInt watcher;
+
+    char cache_pad4[SDL_CACHELINE_SIZE - sizeof(SDL_SpinLock) - 2 * sizeof(SDL_AtomicInt)];
+#endif
+
+    SDL_AtomicInt active;
+
+    /* Only needed for the mutex test */
+    SDL_Mutex *mutex;
+
+} SDL_EventQueue;
+
+static void InitEventQueue(SDL_EventQueue *queue)
+{
+    int i;
+
+    for (i = 0; i < MAX_ENTRIES; ++i) {
+        SDL_SetAtomicInt(&queue->entries[i].sequence, i);
+    }
+    SDL_SetAtomicInt(&queue->enqueue_pos, 0);
+    SDL_SetAtomicInt(&queue->dequeue_pos, 0);
+#ifdef TEST_SPINLOCK_FIFO
+    queue->lock = 0;
+    SDL_SetAtomicInt(&queue->rwcount, 0);
+    SDL_SetAtomicInt(&queue->watcher, 0);
+#endif
+    SDL_SetAtomicInt(&queue->active, 1);
+}
+
+static bool EnqueueEvent_LockFree(SDL_EventQueue *queue, const SDL_Event *event)
+{
+    SDL_EventQueueEntry *entry;
+    unsigned queue_pos;
+    unsigned entry_seq;
+    int delta;
+    bool status;
+
+#ifdef TEST_SPINLOCK_FIFO
+    /* This is a gate so an external thread can lock the queue */
+    SDL_LockSpinlock(&queue->lock);
+    SDL_assert(SDL_GetAtomicInt(&queue->watcher) == 0);
+    SDL_AtomicIncRef(&queue->rwcount);
+    SDL_UnlockSpinlock(&queue->lock);
+#endif
+
+    queue_pos = (unsigned)SDL_GetAtomicInt(&queue->enqueue_pos);
+    for (;;) {
+        entry = &queue->entries[queue_pos & WRAP_MASK];
+        entry_seq = (unsigned)SDL_GetAtomicInt(&entry->sequence);
+
+        delta = (int)(entry_seq - queue_pos);
+        if (delta == 0) {
+            /* The entry and the queue position match, try to increment the queue position */
+            if (SDL_CompareAndSwapAtomicInt(&queue->enqueue_pos, (int)queue_pos, (int)(queue_pos + 1))) {
+                /* We own the object, fill it! */
+                entry->event = *event;
+                SDL_SetAtomicInt(&entry->sequence, (int)(queue_pos + 1));
+                status = true;
+                break;
+            }
+        } else if (delta < 0) {
+            /* We ran into an old queue entry, which means it still needs to be dequeued */
+            status = false;
+            break;
+        } else {
+            /* We ran into a new queue entry, get the new queue position */
+            queue_pos = (unsigned)SDL_GetAtomicInt(&queue->enqueue_pos);
+        }
+    }
+
+#ifdef TEST_SPINLOCK_FIFO
+    (void)SDL_AtomicDecRef(&queue->rwcount);
+#endif
+    return status;
+}
+
+static bool DequeueEvent_LockFree(SDL_EventQueue *queue, SDL_Event *event)
+{
+    SDL_EventQueueEntry *entry;
+    unsigned queue_pos;
+    unsigned entry_seq;
+    int delta;
+    bool status;
+
+#ifdef TEST_SPINLOCK_FIFO
+    /* This is a gate so an external thread can lock the queue */
+    SDL_LockSpinlock(&queue->lock);
+    SDL_assert(SDL_GetAtomicInt(&queue->watcher) == 0);
+    SDL_AtomicIncRef(&queue->rwcount);
+    SDL_UnlockSpinlock(&queue->lock);
+#endif
+
+    queue_pos = (unsigned)SDL_GetAtomicInt(&queue->dequeue_pos);
+    for (;;) {
+        entry = &queue->entries[queue_pos & WRAP_MASK];
+        entry_seq = (unsigned)SDL_GetAtomicInt(&entry->sequence);
+
+        delta = (int)(entry_seq - (queue_pos + 1));
+        if (delta == 0) {
+            /* The entry and the queue position match, try to increment the queue position */
+            if (SDL_CompareAndSwapAtomicInt(&queue->dequeue_pos, (int)queue_pos, (int)(queue_pos + 1))) {
+                /* We own the object, fill it! */
+                *event = entry->event;
+                SDL_SetAtomicInt(&entry->sequence, (int)(queue_pos + MAX_ENTRIES));
+                status = true;
+                break;
+            }
+        } else if (delta < 0) {
+            /* We ran into an old queue entry, which means we've hit empty */
+            status = false;
+            break;
+        } else {
+            /* We ran into a new queue entry, get the new queue position */
+            queue_pos = (unsigned)SDL_GetAtomicInt(&queue->dequeue_pos);
+        }
+    }
+
+#ifdef TEST_SPINLOCK_FIFO
+    (void)SDL_AtomicDecRef(&queue->rwcount);
+#endif
+    return status;
+}
+
+static bool EnqueueEvent_Mutex(SDL_EventQueue *queue, const SDL_Event *event)
+{
+    SDL_EventQueueEntry *entry;
+    unsigned queue_pos;
+    unsigned entry_seq;
+    int delta;
+    bool status = false;
+
+    SDL_LockMutex(queue->mutex);
+
+    queue_pos = (unsigned)queue->enqueue_pos.value;
+    entry = &queue->entries[queue_pos & WRAP_MASK];
+    entry_seq = (unsigned)entry->sequence.value;
+
+    delta = (int)(entry_seq - queue_pos);
+    if (delta == 0) {
+        ++queue->enqueue_pos.value;
+
+        /* We own the object, fill it! */
+        entry->event = *event;
+        entry->sequence.value = (int)(queue_pos + 1);
+        status = true;
+    } else if (delta < 0) {
+        /* We ran into an old queue entry, which means it still needs to be dequeued */
+    } else {
+        SDL_Log("ERROR: mutex failed!");
+    }
+
+    SDL_UnlockMutex(queue->mutex);
+
+    return status;
+}
+
+static bool DequeueEvent_Mutex(SDL_EventQueue *queue, SDL_Event *event)
+{
+    SDL_EventQueueEntry *entry;
+    unsigned queue_pos;
+    unsigned entry_seq;
+    int delta;
+    bool status = false;
+
+    SDL_LockMutex(queue->mutex);
+
+    queue_pos = (unsigned)queue->dequeue_pos.value;
+    entry = &queue->entries[queue_pos & WRAP_MASK];
+    entry_seq = (unsigned)entry->sequence.value;
+
+    delta = (int)(entry_seq - (queue_pos + 1));
+    if (delta == 0) {
+        ++queue->dequeue_pos.value;
+
+        /* We own the object, fill it! */
+        *event = entry->event;
+        entry->sequence.value = (int)(queue_pos + MAX_ENTRIES);
+        status = true;
+    } else if (delta < 0) {
+        /* We ran into an old queue entry, which means we've hit empty */
+    } else {
+        SDL_Log("ERROR: mutex failed!");
+    }
+
+    SDL_UnlockMutex(queue->mutex);
+
+    return status;
+}
+
+typedef struct
+{
+    SDL_EventQueue *queue;
+    int index;
+    char padding1[SDL_CACHELINE_SIZE - (sizeof(SDL_EventQueue *) + sizeof(int)) % SDL_CACHELINE_SIZE];
+    int waits;
+    bool lock_free;
+    char padding2[SDL_CACHELINE_SIZE - sizeof(int) - sizeof(bool)];
+    SDL_Thread *thread;
+} WriterData;
+
+typedef struct
+{
+    SDL_EventQueue *queue;
+    int counters[NUM_WRITERS];
+    int waits;
+    bool lock_free;
+    char padding[SDL_CACHELINE_SIZE - (sizeof(SDL_EventQueue *) + sizeof(int) * NUM_WRITERS + sizeof(int) + sizeof(bool)) % SDL_CACHELINE_SIZE];
+    SDL_Thread *thread;
+} ReaderData;
+
+static int SDLCALL FIFO_Writer(void *_data)
+{
+    WriterData *data = (WriterData *)_data;
+    SDL_EventQueue *queue = data->queue;
+    int i;
+    SDL_Event event;
+
+    event.type = SDL_EVENT_USER;
+    event.user.windowID = 0;
+    event.user.code = 0;
+    event.user.data1 = data;
+    event.user.data2 = NULL;
+
+    if (data->lock_free) {
+        for (i = 0; i < EVENTS_PER_WRITER; ++i) {
+            event.user.code = i;
+            while (!EnqueueEvent_LockFree(queue, &event)) {
+                ++data->waits;
+                SDL_Delay(0);
+            }
+        }
+    } else {
+        for (i = 0; i < EVENTS_PER_WRITER; ++i) {
+            event.user.code = i;
+            while (!EnqueueEvent_Mutex(queue, &event)) {
+                ++data->waits;
+                SDL_Delay(0);
+            }
+        }
+    }
+    return 0;
+}
+
+static int SDLCALL FIFO_Reader(void *_data)
+{
+    ReaderData *data = (ReaderData *)_data;
+    SDL_EventQueue *queue = data->queue;
+    SDL_Event event;
+
+    if (data->lock_free) {
+        for (;;) {
+            if (DequeueEvent_LockFree(queue, &event)) {
+                WriterData *writer = (WriterData *)event.user.data1;
+                ++data->counters[writer->index];
+            } else if (SDL_GetAtomicInt(&queue->active)) {
+                ++data->waits;
+                SDL_Delay(0);
+            } else {
+                /* We drained the queue, we're done! */
+                break;
+            }
+        }
+    } else {
+        for (;;) {
+            if (DequeueEvent_Mutex(queue, &event)) {
+                WriterData *writer = (WriterData *)event.user.data1;
+                ++data->counters[writer->index];
+            } else if (SDL_GetAtomicInt(&queue->active)) {
+                ++data->waits;
+                SDL_Delay(0);
+            } else {
+                /* We drained the queue, we're done! */
+                break;
+            }
+        }
+    }
+    return 0;
+}
+
+#ifdef TEST_SPINLOCK_FIFO
+/* This thread periodically locks the queue for no particular reason */
+static int SDLCALL FIFO_Watcher(void *_data)
+{
+    SDL_EventQueue *queue = (SDL_EventQueue *)_data;
+
+    while (SDL_GetAtomicInt(&queue->active)) {
+        SDL_LockSpinlock(&queue->lock);
+        SDL_AtomicIncRef(&queue->watcher);
+        while (SDL_GetAtomicInt(&queue->rwcount) > 0) {
+            SDL_Delay(0);
+        }
+        /* Do queue manipulation here... */
+        (void)SDL_AtomicDecRef(&queue->watcher);
+        SDL_UnlockSpinlock(&queue->lock);
+
+        /* Wait a bit... */
+        SDL_Delay(1);
+    }
+    return 0;
+}
+#endif /* TEST_SPINLOCK_FIFO */
+
+static void RunFIFOTest(bool lock_free)
+{
+    SDL_EventQueue queue;
+    SDL_Thread *fifo_thread = NULL;
+    WriterData writerData[NUM_WRITERS];
+    ReaderData readerData[NUM_READERS];
+    Uint64 start, end;
+    int i, j;
+    int grand_total;
+    char textBuffer[1024];
+    size_t len;
+
+    SDL_Log("%s", "");
+    SDL_Log("FIFO test---------------------------------------");
+    SDL_Log("%s", "");
+    SDL_Log("Mode: %s", lock_free ? "LockFree" : "Mutex");
+
+    SDL_memset(&queue, 0xff, sizeof(queue));
+
+    InitEventQueue(&queue);
+    if (!lock_free) {
+        queue.mutex = SDL_CreateMutex();
+    }
+
+    start = SDL_GetTicksNS();
+
+#ifdef TEST_SPINLOCK_FIFO
+    /* Start a monitoring thread */
+    if (lock_free) {
+        fifo_thread = SDL_CreateThread(FIFO_Watcher, "FIFOWatcher", &queue);
+    }
+#endif
+
+    /* Start the readers first */
+    SDL_Log("Starting %d readers", NUM_READERS);
+    SDL_zeroa(readerData);
+    for (i = 0; i < NUM_READERS; ++i) {
+        char name[64];
+        (void)SDL_snprintf(name, sizeof(name), "FIFOReader%d", i);
+        readerData[i].queue = &queue;
+        readerData[i].lock_free = lock_free;
+        readerData[i].thread = SDL_CreateThread(FIFO_Reader, name, &readerData[i]);
+    }
+
+    /* Start up the writers */
+    SDL_Log("Starting %d writers", NUM_WRITERS);
+    SDL_zeroa(writerData);
+    for (i = 0; i < NUM_WRITERS; ++i) {
+        char name[64];
+        (void)SDL_snprintf(name, sizeof(name), "FIFOWriter%d", i);
+        writerData[i].queue = &queue;
+        writerData[i].index = i;
+        writerData[i].lock_free = lock_free;
+        writerData[i].thread = SDL_CreateThread(FIFO_Writer, name, &writerData[i]);
+    }
+
+    /* Wait for the writers */
+    for (i = 0; i < NUM_WRITERS; ++i) {
+        SDL_WaitThread(writerData[i].thread, NULL);
+    }
+
+    /* Shut down the queue so readers exit */
+    SDL_SetAtomicInt(&queue.active, 0);
+
+    /* Wait for the readers */
+    for (i = 0; i < NUM_READERS; ++i) {
+        SDL_WaitThread(readerData[i].thread, NULL);
+    }
+
+    end = SDL_GetTicksNS();
+
+    /* Wait for the FIFO thread */
+    if (fifo_thread) {
+        SDL_WaitThread(fifo_thread, NULL);
+    }
+
+    if (!lock_free) {
+        SDL_DestroyMutex(queue.mutex);
+    }
+
+    SDL_Log("Finished in %f sec", (end - start) / 1000000000.0);
+
+    SDL_Log("%s", "");
+    for (i = 0; i < NUM_WRITERS; ++i) {
+        SDL_Log("Writer %d wrote %d events, had %d waits", i, EVENTS_PER_WRITER, writerData[i].waits);
+    }
+    SDL_Log("Writers wrote %d total events", NUM_WRITERS * EVENTS_PER_WRITER);
+
+    /* Print a breakdown of which readers read messages from which writer */
+    SDL_Log("%s", "");
+    grand_total = 0;
+    for (i = 0; i < NUM_READERS; ++i) {
+        int total = 0;
+        for (j = 0; j < NUM_WRITERS; ++j) {
+            total += readerData[i].counters[j];
+        }
+        grand_total += total;
+        SDL_Log("Reader %d read %d events, had %d waits", i, total, readerData[i].waits);
+        (void)SDL_snprintf(textBuffer, sizeof(textBuffer), "  { ");
+        for (j = 0; j < NUM_WRITERS; ++j) {
+            if (j > 0) {
+                len = SDL_strlen(textBuffer);
+                (void)SDL_snprintf(textBuffer + len, sizeof(textBuffer) - len, ", ");
+            }
+            len = SDL_strlen(textBuffer);
+            (void)SDL_snprintf(textBuffer + len, sizeof(textBuffer) - len, "%d", readerData[i].counters[j]);
+        }
+        len = SDL_strlen(textBuffer);
+        (void)SDL_snprintf(textBuffer + len, sizeof(textBuffer) - len, " }\n");
+        SDL_Log("%s", textBuffer);
+    }
+    SDL_Log("Readers read %d total events", grand_total);
+}
+
+/* End FIFO test */
+/**************************************************************************/
+
+int main(int argc, char *argv[])
+{
+    SDLTest_CommonState *state;
+    int i;
+    bool enable_threads = true;
+
+    /* 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 == 0) {
+            consumed = -1;
+            if (SDL_strcasecmp(argv[i], "--no-threads") == 0) {
+                enable_threads = false;
+                consumed = 1;
+            }
+        }
+        if (consumed < 0) {
+            static const char *options[] = {
+                "[--no-threads]",
+                NULL
+            };
+            SDLTest_CommonLogUsage(state, argv[0], options);
+            return 1;
+        }
+        i += consumed;
+    }
+
+    RunBasicTest();
+
+    if (SDL_GetEnvironmentVariable(SDL_GetEnvironment(), "SDL_TESTS_QUICK") != NULL) {
+        SDL_Log("Not running slower tests");
+        return 0;
+    }
+
+    if (enable_threads) {
+        RunEpicTest();
+    }
+/* This test is really slow, so don't run it by default */
+#if 0
+    RunFIFOTest(false);
+#endif
+    RunFIFOTest(true);
+    SDL_Quit();
+    SDLTest_CommonDestroyState(state);
+    return 0;
+}