1 // Copyright 2011 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef V8_PROFILER_CIRCULAR_QUEUE_INL_H_
6 #define V8_PROFILER_CIRCULAR_QUEUE_INL_H_
8 #include "src/profiler/circular-queue.h"
13 template<typename T, unsigned L>
14 SamplingCircularQueue<T, L>::SamplingCircularQueue()
15 : enqueue_pos_(buffer_),
16 dequeue_pos_(buffer_) {
20 template<typename T, unsigned L>
21 SamplingCircularQueue<T, L>::~SamplingCircularQueue() {
25 template<typename T, unsigned L>
26 T* SamplingCircularQueue<T, L>::Peek() {
27 base::MemoryBarrier();
28 if (base::Acquire_Load(&dequeue_pos_->marker) == kFull) {
29 return &dequeue_pos_->record;
35 template<typename T, unsigned L>
36 void SamplingCircularQueue<T, L>::Remove() {
37 base::Release_Store(&dequeue_pos_->marker, kEmpty);
38 dequeue_pos_ = Next(dequeue_pos_);
42 template<typename T, unsigned L>
43 T* SamplingCircularQueue<T, L>::StartEnqueue() {
44 base::MemoryBarrier();
45 if (base::Acquire_Load(&enqueue_pos_->marker) == kEmpty) {
46 return &enqueue_pos_->record;
52 template<typename T, unsigned L>
53 void SamplingCircularQueue<T, L>::FinishEnqueue() {
54 base::Release_Store(&enqueue_pos_->marker, kFull);
55 enqueue_pos_ = Next(enqueue_pos_);
59 template<typename T, unsigned L>
60 typename SamplingCircularQueue<T, L>::Entry* SamplingCircularQueue<T, L>::Next(
62 Entry* next = entry + 1;
63 if (next == &buffer_[L]) return buffer_;
67 } // namespace internal
70 #endif // V8_PROFILER_CIRCULAR_QUEUE_INL_H_