mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
69 lines
2.5 KiB
69 lines
2.5 KiB
// 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_UNBOUND_QUEUE_
|
|
#define V8_UNBOUND_QUEUE_
|
|
|
|
#include "allocation.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
|
|
|
|
// Lock-free unbound queue for small records. Intended for
|
|
// transferring small records between a Single producer and a Single
|
|
// consumer. Doesn't have restrictions on the number of queued
|
|
// elements, so producer never blocks. Implemented after Herb
|
|
// Sutter's article:
|
|
// http://www.ddj.com/high-performance-computing/210604448
|
|
template<typename Record>
|
|
class UnboundQueue BASE_EMBEDDED {
|
|
public:
|
|
inline UnboundQueue();
|
|
inline ~UnboundQueue();
|
|
|
|
INLINE(void Dequeue(Record* rec));
|
|
INLINE(void Enqueue(const Record& rec));
|
|
INLINE(bool IsEmpty()) { return divider_ == last_; }
|
|
INLINE(Record* Peek());
|
|
|
|
private:
|
|
INLINE(void DeleteFirst());
|
|
|
|
struct Node;
|
|
|
|
Node* first_;
|
|
AtomicWord divider_; // Node*
|
|
AtomicWord last_; // Node*
|
|
|
|
DISALLOW_COPY_AND_ASSIGN(UnboundQueue);
|
|
};
|
|
|
|
|
|
} } // namespace v8::internal
|
|
|
|
#endif // V8_UNBOUND_QUEUE_
|
|
|