How do I cancel CWinThread?

4 Answers

1. Actively killing the thread: Use the return value of AfxBeginThread ( CWinThread* ) to get the thread handle ( m_hThread ) then pass that handle to the TerminateThread Win32 API.
2. Waiting for the thread to finish:
3. Signaling to your thread that it should end:
4. Even better ways:

What could cause a thread to terminate prematurely?

Two normal situations cause a thread to terminate: the controlling function exits or the thread is not allowed to run to completion. If the user wants to cancel the printing, however, the background printing thread has to be terminated prematurely.

What is CWinThread?

CWinThread::ResumeThread Called to resume execution of a thread that was suspended by the SuspendThread member function, or a thread created with the CREATE_SUSPENDED flag.

When a thread terminates its processing into what state that thread enters?

What state does a thread enter when it terminates its processing? When a thread terminates its processing, it enters the dead state.

What is worker thread C++?

A worker thread is commonly used to handle background tasks that the user should not have to wait for to continue using your application. Tasks such as recalculation and background printing are good examples of worker threads. Starting the thread. Implementing the controlling function.

What is thread A thread is a dependent path of execution in a system?

A thread is a path of execution within a process. A process can contain multiple threads. Why Multithreading? A thread is also known as lightweight process. The idea is to achieve parallelism by dividing a process into multiple threads.

What does thread detach do?

thread::detach Separates the thread of execution from the thread object, allowing execution to continue independently. Any allocated resources will be freed once the thread exits. After calling detach *this no longer owns any thread.

Does STD Async use thread pool?

Always use the std::launch::async policy with std::async if you actually want multi-threading. If you need a real thread pool or some other higher-level concurrency construct, use a library or roll your own. Standard objects like std::future, std::promise and std::packaged_task can be very helpful.

What are the benefits of threads?

Advantages of Thread

• Threads minimize the context switching time.
• Use of threads provides concurrency within a process.
• Efficient communication.
• It is more economical to create and context switch threads.
• Threads allow utilization of multiprocessor architectures to a greater scale and efficiency.

What happens if you don’t join threads?

If you don’t join these threads, you might end up using more resources than there are concurrent tasks, making it harder to measure the load. To be clear, if you don’t call join , the thread will complete at some point anyway, it won’t leak or anything. But this some point is non-deterministic.

How do you destroy a detached thread?

There is no way to cleanly shutdown a detached thread. Doing so would require waiting for the cleanup to complete, and you can only do that if the thread is joinable. Consider, for example, if the thread holds a mutex that another thread needs to acquire in order to cleanly shut down.

What happens to cwinthread after a thread is terminated?

Set the m_bAutoDelete data member to FALSE. This allows the CWinThread object to survive after the thread has been terminated. You can then access the m_hThread data member after the thread has been terminated.

How do you create a thread in cwinthread?

Creating a thread is simple: You just call :: AfxBeginThread (…), supply a thread handler and voila, thread is started. No matter if you start a thread in a suspended or not suspended state, you know when the thread is started. However, thread destruction is a different story.

Is there a way to terminate a thread prematurely?

Premature Thread Termination. Terminating a thread prematurely is almost as simple: Call AfxEndThread from within the thread. Pass the desired exit code as the only parameter. This stops execution of the thread, deallocates the thread’s stack, detaches all DLLs attached to the thread, and deletes the thread object from memory.

How to terminate a cwinthread object in MFC?

The safest way to do this is to pass CREATE_SUSPENDED to AfxBeginThread, store the handle, and then resume the thread by calling ResumeThread. Either method allows you to determine why a CWinThread object terminated.