Index: base/task_scheduler/priority_queue.cc |
diff --git a/base/task_scheduler/priority_queue.cc b/base/task_scheduler/priority_queue.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..e2c1898720f0555bbf9227f37eab76778bf09d58 |
--- /dev/null |
+++ b/base/task_scheduler/priority_queue.cc |
@@ -0,0 +1,87 @@ |
+// 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/priority_queue.h" |
+ |
+#include <limits> |
+ |
+#include "base/logging.h" |
+ |
+namespace base { |
+namespace internal { |
+ |
+PriorityQueue::SequenceAndSortKey::SequenceAndSortKey( |
+ scoped_refptr<Sequence> sequence, |
+ SequenceSortKey sort_key) |
+ : sequence(sequence), sort_key(sort_key) {} |
+ |
+PriorityQueue::SequenceAndSortKey::~SequenceAndSortKey() = default; |
+ |
+PriorityQueue::PriorityQueue(const Closure& sequence_inserted_callback) |
+ : PriorityQueue(sequence_inserted_callback, nullptr) {} |
+ |
+PriorityQueue::PriorityQueue(const Closure& sequence_inserted_callback, |
+ PriorityQueue* predecessor_priority_queue) |
+ : lock_(&predecessor_priority_queue->lock_), |
robliao
2016/02/23 02:10:58
Won't this line crash since predecessor_priority_q
fdoray
2016/02/23 17:02:14
Done. It didn't crash but it was definitely wrong.
|
+ sequence_inserted_callback_(sequence_inserted_callback) { |
gab
2016/02/23 03:02:10
Same order for initializer list, parameter order,
fdoray
2016/02/23 17:02:14
Done.
|
+ DCHECK(!sequence_inserted_callback_.is_null()); |
+} |
+ |
+PriorityQueue::~PriorityQueue() = default; |
+ |
+PriorityQueue::Transaction::~Transaction() { |
+ DCHECK(CalledOnValidThread()); |
+ auto_lock_.reset(); |
gab
2016/02/23 03:02:10
Add a comment about what's happening here (unlock
fdoray
2016/02/23 17:02:14
Done.
|
+ for (size_t i = 0; i < num_pushed_sequences_; ++i) |
+ priority_queue_->sequence_inserted_callback_.Run(); |
+} |
+ |
+void PriorityQueue::Transaction::PushSequence(scoped_refptr<Sequence> sequence, |
+ const SequenceSortKey& sort_key) { |
+ DCHECK(CalledOnValidThread()); |
+ priority_queue_->container_.push( |
+ make_scoped_ptr(new SequenceAndSortKey(sequence, sort_key))); |
+ ++num_pushed_sequences_; |
+} |
+ |
+PriorityQueue::SequenceAndSortKey PriorityQueue::Transaction::PeekSequence() |
+ const { |
+ DCHECK(CalledOnValidThread()); |
+ |
+ if (priority_queue_->container_.empty()) { |
+ return SequenceAndSortKey( |
+ scoped_refptr<Sequence>(), |
+ SequenceSortKey( |
+ TaskPriority::LOWEST, |
+ TimeTicks::FromInternalValue(std::numeric_limits<int64_t>::max()))); |
gab
2016/02/23 03:02:10
Should SequenceAndSortKey instead have a default c
fdoray
2016/02/23 17:02:14
Done.
|
+ } |
+ |
+ return *priority_queue_->container_.top(); |
+} |
+ |
+void PriorityQueue::Transaction::PopSequence() { |
+ DCHECK(CalledOnValidThread()); |
+ DCHECK(!priority_queue_->container_.empty()); |
+ priority_queue_->container_.pop(); |
+} |
+ |
+PriorityQueue::Transaction::Transaction(PriorityQueue* priority_queue) |
+ : priority_queue_(priority_queue), |
+ auto_lock_(new AutoSchedulerLock(priority_queue->lock_)), |
+ num_pushed_sequences_(0) { |
+ DCHECK(CalledOnValidThread()); |
+} |
+ |
+scoped_ptr<PriorityQueue::Transaction> PriorityQueue::BeginTransaction() { |
+ return make_scoped_ptr(new Transaction(this)); |
+} |
+ |
+bool PriorityQueue::SequenceAndSortKeyComparator::operator()( |
+ const scoped_ptr<SequenceAndSortKey>& left, |
+ const scoped_ptr<SequenceAndSortKey>& right) const { |
+ return left->sort_key < right->sort_key; |
+} |
+ |
+} // namespace internal |
+} // namespace base |