forked from OSchip/llvm-project
80 lines
1.5 KiB
C++
80 lines
1.5 KiB
C++
//===-- tsan_clock.h --------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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_CLOCK_H
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#define TSAN_CLOCK_H
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#include "tsan_defs.h"
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#include "tsan_vector.h"
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namespace __tsan {
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// The clock that lives in sync variables (mutexes, atomics, etc).
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class SyncClock {
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public:
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SyncClock();
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uptr size() const {
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return clk_.Size();
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}
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void Reset() {
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clk_.Reset();
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}
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private:
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Vector<u64> clk_;
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friend struct ThreadClock;
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};
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// The clock that lives in threads.
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struct ThreadClock {
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public:
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ThreadClock();
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u64 get(unsigned tid) const {
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DCHECK(tid < kMaxTid);
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return clk_[tid];
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}
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void set(unsigned tid, u64 v) {
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DCHECK(tid < kMaxTid);
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DCHECK(v >= clk_[tid]);
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clk_[tid] = v;
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if (nclk_ <= tid)
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nclk_ = tid + 1;
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}
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void tick(unsigned tid) {
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DCHECK(tid < kMaxTid);
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clk_[tid]++;
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if (nclk_ <= tid)
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nclk_ = tid + 1;
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}
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uptr size() const {
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return nclk_;
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}
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void acquire(const SyncClock *src);
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void release(SyncClock *dst) const;
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void acq_rel(SyncClock *dst);
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private:
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uptr nclk_;
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u64 clk_[kMaxTid];
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};
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} // namespace __tsan
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#endif // TSAN_CLOCK_H
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