Index: base/task_scheduler/utils.cc |
diff --git a/base/task_scheduler/utils.cc b/base/task_scheduler/utils.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d43028fe7773dcf82199470d98bb971d58393220 |
--- /dev/null |
+++ b/base/task_scheduler/utils.cc |
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+// 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. |
+ |
+#include "base/task_scheduler/utils.h" |
+ |
+#include <utility> |
+ |
+#include "base/logging.h" |
+#include "base/memory/ptr_util.h" |
+#include "base/task_scheduler/priority_queue.h" |
+#include "base/task_scheduler/sequence_sort_key.h" |
+#include "base/task_scheduler/task_tracker.h" |
+ |
+namespace base { |
+namespace internal { |
+ |
+bool PostTaskHelper(std::unique_ptr<Task> task, |
+ scoped_refptr<Sequence> sequence, |
+ PriorityQueue* priority_queue, |
+ TaskTracker* task_tracker) { |
+ DCHECK(task); |
+ DCHECK(sequence); |
+ DCHECK(priority_queue); |
+ DCHECK(task_tracker); |
+ |
+ if (!task_tracker->WillPostTask(task.get())) |
+ return false; |
+ |
+ const bool sequence_was_empty = sequence->PushTask(std::move(task)); |
+ if (sequence_was_empty) { |
+ // Insert |sequence| in |priority_queue| if it was empty before |task| was |
+ // inserted into it. When that's not the case, one of these must be true: |
+ // - |sequence| is already in a PriorityQueue, or, |
+ // - A worker thread is running a Task from |sequence|. It will insert |
+ // |sequence| in a PriorityQueue once it's done running the Task. |
+ const auto sequence_sort_key = sequence->GetSortKey(); |
+ priority_queue->BeginTransaction()->Push( |
+ WrapUnique(new PriorityQueue::SequenceAndSortKey(std::move(sequence), |
+ sequence_sort_key))); |
+ } |
+ |
+ return true; |
+} |
+ |
+} // namespace internal |
+} // namespace base |