Is there a way to tell if a join exits from a timeout or thread dying?

Is there a way to tell if a join exits from a timeout or thread dying?

By : Daniel
Date : November 17 2020, 11:52 AM
I wish this helpful for you I have some code that talks to a api. After the server runs for about a day, it freezes on the call to stream.read;
code :
Thread one = ...;
if (one.isAlive()) {
  //clearly, the Thread is not dead

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Timeout for thread.join()

Timeout for thread.join()

By : Alex
Date : March 29 2020, 07:55 AM
To fix the issue you can do There is no timeout for std::thread::join(). However you can view std::thread::join() as merely a convenience function. Using condition_variables you can create very rich communication and cooperation between your threads, including timed waits. For example:
code :
#include <chrono>
#include <thread>
#include <iostream>

int thread_count = 0;
bool time_to_quit = false;
std::mutex m;
std::condition_variable cv;

void f(int id)
    std::lock_guard<std::mutex> _(m);
    while (true)
        std::lock_guard<std::mutex> _(m);
        std::cout << "thread " << id << " working\n";
        std::lock_guard<std::mutex> _(m);
        if (time_to_quit)
    std::lock_guard<std::mutex> _(m);
    std::cout << "thread ended\n";

int main()
    typedef std::chrono::steady_clock Clock;
    std::thread(f, 1).detach();
    std::thread(f, 2).detach();
    std::thread(f, 3).detach();
    std::thread(f, 4).detach();
    std::thread(f, 5).detach();
    auto t0 = Clock::now();
    auto t1 = t0 + std::chrono::seconds(5);
    std::unique_lock<std::mutex> lk(m);
    while (!time_to_quit && Clock::now() < t1)
        cv.wait_until(lk, t1);
    time_to_quit = true;
    std::cout << "main ending\n";
    while (thread_count > 0)
    std::cout << "main ended\n";
Thread.Join(int) not killing thread after specified timeout in C#

Thread.Join(int) not killing thread after specified timeout in C#

By : Michael Smith
Date : March 29 2020, 07:55 AM
this will help I found the real problem:
The property compInfo.Path is doing a check for a directory existence on the remote file system to determine if the remote machine is 64 bit or not. Depending on the results, it returns a different value. I tried commenting out the the check and it executed successfully. This explains why I couldn't get past the throwing of the exception, I call compInfo.Path in the message of the exception.
std::thread::join() hangs if called after main() exits when using VS2012 RC

std::thread::join() hangs if called after main() exits when using VS2012 RC

By : zerolu
Date : March 29 2020, 07:55 AM
Hope that helps Tracing through Fraser's sample code in his connect bug (https://connect.microsoft.com/VisualStudio/feedback/details/747145) with VS2012 RTM seems to show a fairly straightforward case of deadlocking. This likely isn't specific to std::thread - likely _beginthreadex suffers the same fate.
What I see in the debugger is the following:
when main thread exits from thread join method

when main thread exits from thread join method

By : Nicole van Gerven LL
Date : March 29 2020, 07:55 AM
should help you out Since the joining thread has called wait() as you've seen in the source code, then the target thread must call notify() or notifyAll to wake it up.
If you can't see that anywhere in the Thread source code, then it may happen in a different class, or the native code or the non-public JVM-vendor implementation code.
C++11: How can I join a std::thread as soon as its execution function exits?

C++11: How can I join a std::thread as soon as its execution function exits?

By : Rodrigo Willrich
Date : March 29 2020, 07:55 AM
will be helpful for those in need
Is having a thread whose execution function has exited a drain on resources if it is never joined with the main thread
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