Revert r4159 because of x64 test failures.

src/circular-queue-inl.h

-// Copyright 2010 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-//       notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-//       copyright notice, this list of conditions and the following
-//       disclaimer in the documentation and/or other materials provided
-//       with the distribution.
-//     * Neither the name of Google Inc. nor the names of its
-//       contributors may be used to endorse or promote products derived
-//       from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#ifndef V8_CIRCULAR_BUFFER_INL_H_
-#define V8_CIRCULAR_BUFFER_INL_H_
-
-#include "circular-queue.h"
-
-namespace v8 {
-namespace internal {
-
-
-template<typename Record>
-CircularQueue<Record>::CircularQueue(int desired_buffer_size_in_bytes)
-    : buffer_(NewArray<Record>(desired_buffer_size_in_bytes / sizeof(Record))),
-      buffer_end_(buffer_ + desired_buffer_size_in_bytes / sizeof(Record)),
-      enqueue_semaphore_(OS::CreateSemaphore((buffer_end_ - buffer_) - 1)),
-      enqueue_pos_(buffer_),
-      dequeue_pos_(buffer_) {
-  // To be able to distinguish between a full and an empty queue
-  // state, the queue must be capable of containing at least 2
-  // records.
-  ASSERT((buffer_end_ - buffer_) >= 2);
-}
-
-
-template<typename Record>
-CircularQueue<Record>::~CircularQueue() {
-  DeleteArray(buffer_);
-  delete enqueue_semaphore_;
-}
-
-
-template<typename Record>
-void CircularQueue<Record>::Dequeue(Record* rec) {
-  ASSERT(!IsEmpty());
-  *rec = *dequeue_pos_;
-  dequeue_pos_ = Next(dequeue_pos_);
-  // Tell we have a spare record.
-  enqueue_semaphore_->Signal();
-}
-
-
-template<typename Record>
-void CircularQueue<Record>::Enqueue(const Record& rec) {
-  // Wait until we have at least one spare record.
-  enqueue_semaphore_->Wait();
-  ASSERT(Next(enqueue_pos_) != dequeue_pos_);
-  *enqueue_pos_ = rec;
-  enqueue_pos_ = Next(enqueue_pos_);
-}
-
-
-template<typename Record>
-Record* CircularQueue<Record>::Next(Record* curr) {
-  return ++curr != buffer_end_ ? curr : buffer_;
-}
-
-
-void* SamplingCircularQueue::Enqueue() {
-  Cell* enqueue_pos = reinterpret_cast<Cell*>(
-      Thread::GetThreadLocal(producer_key_));
-  WrapPositionIfNeeded(&enqueue_pos);
-  Thread::SetThreadLocal(producer_key_, enqueue_pos + record_size_);
-  return enqueue_pos;
-}
-
-
-void SamplingCircularQueue::WrapPositionIfNeeded(
-    SamplingCircularQueue::Cell** pos) {
-  if (**pos == kEnd) *pos = buffer_;
-}
-
-
-} }  // namespace v8::internal
-
-#endif  // V8_CIRCULAR_BUFFER_INL_H_