Line data    Source code

       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.
       4             : 
       5             : #ifndef V8_PROFILER_CIRCULAR_QUEUE_INL_H_
       6             : #define V8_PROFILER_CIRCULAR_QUEUE_INL_H_
       7             : 
       8             : #include "src/profiler/circular-queue.h"
       9             : 
      10             : namespace v8 {
      11             : namespace internal {
      12             : 
      13             : template<typename T, unsigned L>
      14             : SamplingCircularQueue<T, L>::SamplingCircularQueue()
      15             :     : enqueue_pos_(buffer_),
      16      138421 :       dequeue_pos_(buffer_) {
      17             : }
      18             : 
      19             : 
      20             : template<typename T, unsigned L>
      21             : SamplingCircularQueue<T, L>::~SamplingCircularQueue() {
      22             : }
      23             : 
      24             : 
      25             : template<typename T, unsigned L>
      26      422512 : T* SamplingCircularQueue<T, L>::Peek() {
      27             :   base::SeqCst_MemoryFence();
      28      845024 :   if (base::Acquire_Load(&dequeue_pos_->marker) == kFull) {
      29       77485 :     return &dequeue_pos_->record;
      30             :   }
      31             :   return nullptr;
      32             : }
      33             : 
      34             : 
      35             : template<typename T, unsigned L>
      36       32215 : void SamplingCircularQueue<T, L>::Remove() {
      37       32215 :   base::Release_Store(&dequeue_pos_->marker, kEmpty);
      38       64430 :   dequeue_pos_ = Next(dequeue_pos_);
      39       32215 : }
      40             : 
      41             : 
      42             : template<typename T, unsigned L>
      43       32443 : T* SamplingCircularQueue<T, L>::StartEnqueue() {
      44             :   base::SeqCst_MemoryFence();
      45       64886 :   if (base::Acquire_Load(&enqueue_pos_->marker) == kEmpty) {
      46       32377 :     return &enqueue_pos_->record;
      47             :   }
      48             :   return nullptr;
      49             : }
      50             : 
      51             : 
      52             : template<typename T, unsigned L>
      53       32377 : void SamplingCircularQueue<T, L>::FinishEnqueue() {
      54       32377 :   base::Release_Store(&enqueue_pos_->marker, kFull);
      55       64754 :   enqueue_pos_ = Next(enqueue_pos_);
      56       32377 : }
      57             : 
      58             : 
      59             : template<typename T, unsigned L>
      60             : typename SamplingCircularQueue<T, L>::Entry* SamplingCircularQueue<T, L>::Next(
      61             :     Entry* entry) {
      62       64592 :   Entry* next = entry + 1;
      63       64592 :   if (next == &buffer_[L]) return buffer_;
      64             :   return next;
      65             : }
      66             : 
      67             : }  // namespace internal
      68             : }  // namespace v8
      69             : 
      70             : #endif  // V8_PROFILER_CIRCULAR_QUEUE_INL_H_