webkitgtk-2.4.11webkitgtk-2.4.11

1 files changed, 0 insertions, 118 deletions

diff --git a/Source/JavaScriptCore/API/tests/CompareAndSwapTest.cpp b/Source/JavaScriptCore/API/tests/CompareAndSwapTest.cpp
deleted file mode 100644
index 525ebc9cc..000000000
--- a/Source/JavaScriptCore/API/tests/CompareAndSwapTest.cpp
+++ /dev/null
@@ -1,118 +0,0 @@
-/*
- * Copyright (C) 2015 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "CompareAndSwapTest.h"
-
-#include <stdio.h>
-#include <wtf/Atomics.h>
-#include <wtf/Threading.h>
-
-class Bitmap {
-public:
-    Bitmap() { clearAll(); }
-
-    inline void clearAll();
-    inline bool concurrentTestAndSet(size_t n);
-    inline size_t numBits() const { return words * wordSize; }
-
-private:
-    static const size_t Size = 4096*10;
-
-    static const unsigned wordSize = sizeof(uint8_t) * 8;
-    static const unsigned words = (Size + wordSize - 1) / wordSize;
-    static const uint8_t one = 1;
-
-    uint8_t bits[words];
-};
-
-inline void Bitmap::clearAll()
-{
-    memset(&bits, 0, sizeof(bits));
-}
-
-inline bool Bitmap::concurrentTestAndSet(size_t n)
-{
-    uint8_t mask = one << (n % wordSize);
-    size_t index = n / wordSize;
-    uint8_t* wordPtr = &bits[index];
-    uint8_t oldValue;
-    do {
-        oldValue = *wordPtr;
-        if (oldValue & mask)
-            return true;
-    } while (!WTF::weakCompareAndSwap(wordPtr, oldValue, static_cast<uint8_t>(oldValue | mask)));
-    return false;
-}
-
-struct Data {
-    Bitmap* bitmap;
-    int id;
-    int numThreads;
-};
-
-static void setBitThreadFunc(void* p)
-{
-    Data* data = reinterpret_cast<Data*>(p);
-    Bitmap* bitmap = data->bitmap;
-    size_t numBits = bitmap->numBits();
-
-    // The computed start index here is heuristic that seems to maximize (anecdotally)
-    // the chance for the CAS issue to manifest.
-    size_t start = (numBits * (data->numThreads - data->id)) / data->numThreads;
-
-    printf("   started Thread %d\n", data->id);
-    for (size_t i = start; i < numBits; i++)
-        while (!bitmap->concurrentTestAndSet(i)) { }
-    for (size_t i = 0; i < start; i++)
-        while (!bitmap->concurrentTestAndSet(i)) { }
-
-    printf("   finished Thread %d\n", data->id);
-}
-
-void testCompareAndSwap()
-{
-    Bitmap bitmap;
-    const int numThreads = 5;
-    ThreadIdentifier threadIDs[numThreads];
-    Data data[numThreads];
-
-    WTF::initializeThreading();
-    
-    printf("Starting %d threads for CompareAndSwap test.  Test should complete without hanging.\n", numThreads);
-    for (int i = 0; i < numThreads; i++) {
-        data[i].bitmap = &bitmap;
-        data[i].id = i;
-        data[i].numThreads = numThreads;
-        std::function<void()> threadFunc = std::bind(setBitThreadFunc, &data[i]);
-        threadIDs[i] = createThread("setBitThreadFunc", threadFunc);
-    }
-
-    printf("Waiting for %d threads to join\n", numThreads);
-    for (int i = 0; i < numThreads; i++)
-        waitForThreadCompletion(threadIDs[i]);
-
-    printf("PASS: CompareAndSwap test completed without a hang\n");
-}