Implementation of SequencedTaskRunner based on SequencedWorkerPool.

base/threading/sequenced_worker_pool_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/threading/sequenced_worker_pool_unittest.h"
+
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/message_loop_proxy.h"
 #include "base/synchronization/condition_variable.h"
 #include "base/synchronization/lock.h"
 #include "base/test/task_runner_test_template.h"
 #include "base/threading/platform_thread.h"
-#include "base/threading/sequenced_worker_pool.h"
 #include "base/tracked_objects.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace base {
 
+SequencedWorkerPoolOwner::SequencedWorkerPoolOwner(
+    size_t max_threads,
+    const std::string& thread_name_prefix)
+    : constructor_message_loop_(MessageLoop::current()),
+      pool_(new SequencedWorkerPool(max_threads, thread_name_prefix)) {
+  pool_->SetTestingObserver(this);
+}
+
+SequencedWorkerPoolOwner::~SequencedWorkerPoolOwner() {
+  pool_ = NULL;
+  MessageLoop::current()->Run();
+}
+
+const scoped_refptr<SequencedWorkerPool>& SequencedWorkerPoolOwner::pool() {
+  return pool_;
+}
+
+void SequencedWorkerPoolOwner::SetWillWaitForShutdownCallback(
+    const Closure& callback) {
+  will_wait_for_shutdown_callback_ = callback;
+}
+
+void SequencedWorkerPoolOwner::WillWaitForShutdown() {
+  if (!will_wait_for_shutdown_callback_.is_null()) {
+    will_wait_for_shutdown_callback_.Run();
+  }
+}
+
+void SequencedWorkerPoolOwner::OnDestruct() {
+  constructor_message_loop_->PostTask(
+      FROM_HERE,
+      constructor_message_loop_->QuitClosure());
+}
+
 // IMPORTANT NOTE:
 //
 // Many of these tests have failure modes where they'll hang forever. These
 // tests should not be flaky, and hangling indicates a type of failure. Do not
 // mark as flaky if they're hanging, it's likely an actual bug.
 
 namespace {
 
 const size_t kNumWorkerThreads = 3;
 
@@ skipping 105 matching lines @@
 
   base::ConditionVariable cond_var_;
 
   // Protected by lock_.
   std::vector<int> complete_sequence_;
 
   // Counter of the number of "block" workers that have started.
   size_t started_events_;
 };
 
-// Wrapper around SequencedWorkerPool that blocks destruction until
-// the pool is actually destroyed.  This is so that a
-// SequencedWorkerPool from one test doesn't outlive its test and
-// cause strange races with other tests that touch global stuff (like
-// histograms and logging).  However, this requires that nothing else
-// on this thread holds a ref to the pool when the
-// SequencedWorkerPoolOwner is destroyed.
-class SequencedWorkerPoolOwner : public SequencedWorkerPool::TestingObserver {
- public:
-  SequencedWorkerPoolOwner(size_t max_threads,
-                           const std::string& thread_name_prefix)
-      : constructor_message_loop_(MessageLoop::current()),
-        pool_(new SequencedWorkerPool(max_threads, thread_name_prefix)) {
-    pool_->SetTestingObserver(this);
-  }
-
-  virtual ~SequencedWorkerPoolOwner() {
-    pool_ = NULL;
-    MessageLoop::current()->Run();
-  }
-
-  // Don't change the return pool's testing observer.
-  const scoped_refptr<SequencedWorkerPool>& pool() {
-    return pool_;
-  }
-
-  // The given callback will be called on WillWaitForShutdown().
-  void SetWillWaitForShutdownCallback(const Closure& callback) {
-    will_wait_for_shutdown_callback_ = callback;
-  }
-
- private:
-  // SequencedWorkerPool::TestingObserver implementation.
-  virtual void WillWaitForShutdown() OVERRIDE {
-    if (!will_wait_for_shutdown_callback_.is_null()) {
-      will_wait_for_shutdown_callback_.Run();
-    }
-  }
-
-  virtual void OnDestruct() OVERRIDE {
-    constructor_message_loop_->PostTask(
-        FROM_HERE,
-        constructor_message_loop_->QuitClosure());
-  }
-
-  MessageLoop* const constructor_message_loop_;
-  scoped_refptr<SequencedWorkerPool> pool_;
-  Closure will_wait_for_shutdown_callback_;
-
-  DISALLOW_COPY_AND_ASSIGN(SequencedWorkerPoolOwner);
-};
-
 class SequencedWorkerPoolTest : public testing::Test {
  public:
   SequencedWorkerPoolTest()
       : pool_owner_(kNumWorkerThreads, "test"),
         tracker_(new TestTracker) {}
 
   ~SequencedWorkerPoolTest() {}
 
   virtual void SetUp() {}
 
@@ skipping 302 matching lines @@
   scoped_ptr<SequencedWorkerPoolOwner> pool_owner_;
 };
 
 INSTANTIATE_TYPED_TEST_CASE_P(
     SequencedWorkerPool, TaskRunnerTest,
     SequencedWorkerPoolTaskRunnerTestDelegate);
 
 }  // namespace
 
 }  // namespace base