TaskScheduler [2/9] Scheduler Lock

base/task_scheduler/scheduler_lock_impl.h

Index: base/task_scheduler/scheduler_lock_impl.h
diff --git a/base/task_scheduler/scheduler_lock_impl.h b/base/task_scheduler/scheduler_lock_impl.h
new file mode 100644
index 0000000000000000000000000000000000000000..512aeff8cca62eb92d2b4d6d6d42837a492421aa
--- /dev/null
+++ b/base/task_scheduler/scheduler_lock_impl.h
@@ -0,0 +1,45 @@
+// Copyright 2016 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.
+
+#ifndef BASE_TASK_SCHEDULER_SCHEDULER_LOCK_IMPL_H
+#define BASE_TASK_SCHEDULER_SCHEDULER_LOCK_IMPL_H
+
+#include "base/base_export.h"
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/synchronization/lock.h"
+
+namespace base {
+
+class ConditionVariable;
+
+namespace internal {
+
+// A regular lock with simple deadlock correctness checking.
+// This lock tracks all of the available locks to make sure that any locks are
+// acquired in an expected order.
+// See scheduler_lock.h for full DCHECK details.

[gab, 2016/02/19 16:08:03]

s/full DCHECK details/details/ ? (i.e. there are more details than just DCHECKs
in scheduler_lock.h; e.g., method comments)

[robliao, 2016/02/19 21:25:06]

Fair enough. Done.

+class BASE_EXPORT SchedulerLockImpl {
+ public:
+  SchedulerLockImpl();
+  explicit SchedulerLockImpl(const SchedulerLockImpl* predecessor);
+  ~SchedulerLockImpl();
+
+  void Acquire();
+  void Release();
+
+  void AssertAcquired() const;
+
+  scoped_ptr<ConditionVariable> CreateConditionVariable();
+
+ private:
+  Lock lock_;
+
+  DISALLOW_COPY_AND_ASSIGN(SchedulerLockImpl);
+};
+
+}  // namespace internal
+}  // namespace base
+
+#endif  // BASE_TASK_SCHEDULER_SCHEDULER_LOCK_IMPL_H