CODEWITHSUNDEEP
c++mutextimedunique-lock
Sujith Gunawardhane
Sujith Gunawardhane

Reputation: 1311

TSAN WARNING: ThreadSanitizer: unlock of an unlocked mutex (or by a wrong thread)

I have write the following member function in my class which executes in a seperate thread and it sets the _cancellationRequested to true and execution function which runs in a seperate thread detects that variable and cancel the execution and return. All good in functionality. However I'm getting a TSAN warning as

TSAN WARNING: ThreadSanitizer: unlock of an unlocked mutex (or by a wrong thread)

at the end of the if block.

bool Sender::CancelRequest()
{
    std::unique_lock<std::timed_mutex> lock(_processMutex, std::try_to_lock);
    if (!lock.owns_lock())
    {
        _cancellationRequested = true;

        std::unique_lock<std::timed_mutex> timedLock(_processMutex, std::chrono::seconds(30));
        if (!timedLock.owns_lock())
        {
            // Unable to get the lock 
            return false;
        }

        return _cancelled;
    }

    // Cancellation Called without having a request
    return false;
}

Please help me in identifying how to fix it.

Upvotes: 1

Views: 109

Answers (0)

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