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52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
//===-- tsan_vector_clock.h -------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of ThreadSanitizer (TSan), a race detector.
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//
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//===----------------------------------------------------------------------===//
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#ifndef TSAN_VECTOR_CLOCK_H
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#define TSAN_VECTOR_CLOCK_H
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#include "tsan_defs.h"
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namespace __tsan {
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// Fixed-size vector clock, used both for threads and sync objects.
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class VectorClock {
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public:
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VectorClock();
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Epoch Get(Sid sid) const;
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void Set(Sid sid, Epoch v);
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void Reset();
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void Acquire(const VectorClock* src);
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void Release(VectorClock** dstp) const;
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void ReleaseStore(VectorClock** dstp) const;
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void ReleaseStoreAcquire(VectorClock** dstp);
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void ReleaseAcquire(VectorClock** dstp);
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VectorClock& operator=(const VectorClock& other);
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private:
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Epoch clk_[kThreadSlotCount] VECTOR_ALIGNED;
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};
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ALWAYS_INLINE Epoch VectorClock::Get(Sid sid) const {
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return clk_[static_cast<u8>(sid)];
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}
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ALWAYS_INLINE void VectorClock::Set(Sid sid, Epoch v) {
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DCHECK_GE(v, clk_[static_cast<u8>(sid)]);
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clk_[static_cast<u8>(sid)] = v;
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}
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} // namespace __tsan
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#endif // TSAN_VECTOR_CLOCK_H
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