2bc0ff6e24
This check verifies that all .h files in the src/ directory have an include guard of the form #ifndef V8_PATH_TO_FILE_H_ #define V8_PATH_TO_FILE_H_ // ... #endif // V8_PATH_TO_FILE_H_ The check can be skipped with a magic comment: // PRESUBMIT_INTENTIONALLY_MISSING_INCLUDE_GUARD Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng;master.tryserver.blink:linux_trusty_blink_rel Change-Id: I0a7b96abec289ad60f64ba8418f1892a6969596d Reviewed-on: https://chromium-review.googlesource.com/897487 Reviewed-by: Benedikt Meurer <bmeurer@chromium.org> Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org> Reviewed-by: Georg Neis <neis@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Reviewed-by: Andreas Haas <ahaas@chromium.org> Commit-Queue: Jakob Gruber <jgruber@chromium.org> Cr-Commit-Position: refs/heads/master@{#51079}
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_LOCKED_QUEUE_H_
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#define V8_LOCKED_QUEUE_H_
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#include "src/allocation.h"
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#include "src/base/platform/platform.h"
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namespace v8 {
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namespace internal {
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// Simple lock-based unbounded size queue (multi producer; multi consumer) based
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// on "Simple, Fast, and Practical Non-Blocking and Blocking Concurrent Queue
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// Algorithms" by M. Scott and M. Michael.
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// See:
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// https://www.cs.rochester.edu/research/synchronization/pseudocode/queues.html
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template <typename Record>
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class LockedQueue final BASE_EMBEDDED {
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public:
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inline LockedQueue();
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inline ~LockedQueue();
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inline void Enqueue(const Record& record);
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inline bool Dequeue(Record* record);
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inline bool IsEmpty() const;
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inline bool Peek(Record* record) const;
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private:
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struct Node;
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mutable base::Mutex head_mutex_;
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base::Mutex tail_mutex_;
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Node* head_;
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Node* tail_;
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DISALLOW_COPY_AND_ASSIGN(LockedQueue);
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};
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} // namespace internal
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} // namespace v8
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#endif // V8_LOCKED_QUEUE_H_
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