1 files changed, 146 insertions, 0 deletions
diff --git a/chromium/third_party/webrtc/base/criticalsection_unittest.cc b/chromium/third_party/webrtc/base/criticalsection_unittest.cc
new file mode 100644
index 00000000000..e1b05cb0170
--- /dev/null
+++ b/chromium/third_party/webrtc/base/criticalsection_unittest.cc
@@ -0,0 +1,146 @@
+/*
+ *  Copyright 2014 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <set>
+#include <vector>
+
+#include "webrtc/base/criticalsection.h"
+#include "webrtc/base/event.h"
+#include "webrtc/base/gunit.h"
+#include "webrtc/base/scopedptrcollection.h"
+#include "webrtc/base/thread.h"
+
+namespace rtc {
+
+namespace {
+
+const int kLongTime = 10000;  // 10 seconds
+const int kNumThreads = 16;
+const int kOperationsToRun = 1000;
+
+template <class T>
+class AtomicOpRunner : public MessageHandler {
+ public:
+  explicit AtomicOpRunner(int initial_value)
+      : value_(initial_value),
+        threads_active_(0),
+        start_event_(true, false),
+        done_event_(true, false) {}
+
+  int value() const { return value_; }
+
+  bool Run() {
+    // Signal all threads to start.
+    start_event_.Set();
+
+    // Wait for all threads to finish.
+    return done_event_.Wait(kLongTime);
+  }
+
+  void SetExpectedThreadCount(int count) {
+    threads_active_ = count;
+  }
+
+  virtual void OnMessage(Message* msg) {
+    std::vector<int> values;
+    values.reserve(kOperationsToRun);
+
+    // Wait to start.
+    ASSERT_TRUE(start_event_.Wait(kLongTime));
+
+    // Generate a bunch of values by updating value_ atomically.
+    for (int i = 0; i < kOperationsToRun; ++i) {
+      values.push_back(T::AtomicOp(&value_));
+    }
+
+    { // Add them all to the set.
+      CritScope cs(&all_values_crit_);
+      for (size_t i = 0; i < values.size(); ++i) {
+        std::pair<std::set<int>::iterator, bool> result =
+            all_values_.insert(values[i]);
+        // Each value should only be taken by one thread, so if this value
+        // has already been added, something went wrong.
+        EXPECT_TRUE(result.second)
+            << "Thread=" << Thread::Current() << " value=" << values[i];
+      }
+    }
+
+    // Signal that we're done.
+    if (AtomicOps::Decrement(&threads_active_) == 0) {
+      done_event_.Set();
+    }
+  }
+
+ private:
+  int value_;
+  int threads_active_;
+  CriticalSection all_values_crit_;
+  std::set<int> all_values_;
+  Event start_event_;
+  Event done_event_;
+};
+
+struct IncrementOp {
+  static int AtomicOp(int* i) { return AtomicOps::Increment(i); }
+};
+
+struct DecrementOp {
+  static int AtomicOp(int* i) { return AtomicOps::Decrement(i); }
+};
+
+void StartThreads(ScopedPtrCollection<Thread>* threads,
+                  MessageHandler* handler) {
+  for (int i = 0; i < kNumThreads; ++i) {
+    Thread* thread = new Thread();
+    thread->Start();
+    thread->Post(handler);
+    threads->PushBack(thread);
+  }
+}
+
+}  // namespace
+
+TEST(AtomicOpsTest, Simple) {
+  int value = 0;
+  EXPECT_EQ(1, AtomicOps::Increment(&value));
+  EXPECT_EQ(1, value);
+  EXPECT_EQ(2, AtomicOps::Increment(&value));
+  EXPECT_EQ(2, value);
+  EXPECT_EQ(1, AtomicOps::Decrement(&value));
+  EXPECT_EQ(1, value);
+  EXPECT_EQ(0, AtomicOps::Decrement(&value));
+  EXPECT_EQ(0, value);
+}
+
+TEST(AtomicOpsTest, Increment) {
+  // Create and start lots of threads.
+  AtomicOpRunner<IncrementOp> runner(0);
+  ScopedPtrCollection<Thread> threads;
+  StartThreads(&threads, &runner);
+  runner.SetExpectedThreadCount(kNumThreads);
+
+  // Release the hounds!
+  EXPECT_TRUE(runner.Run());
+  EXPECT_EQ(kOperationsToRun * kNumThreads, runner.value());
+}
+
+TEST(AtomicOpsTest, Decrement) {
+  // Create and start lots of threads.
+  AtomicOpRunner<DecrementOp> runner(kOperationsToRun * kNumThreads);
+  ScopedPtrCollection<Thread> threads;
+  StartThreads(&threads, &runner);
+  runner.SetExpectedThreadCount(kNumThreads);
+
+  // Release the hounds!
+  EXPECT_TRUE(runner.Run());
+  EXPECT_EQ(0, runner.value());
+}
+
+}  // namespace rtc