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Can we return a value from thread?
It’s usually pointless, but in Android you can’t make a network request to a server on the main Thread (to keep the app responsive) so you’ll have to use a network thread. There are scenarios in which you need the result before the app can resume.
How does thread run method return value?
get() whenever you need to grab your returned value, the thread is started the very second you give value a value so you don’t ever have to say threadName. start() on it. If you want the value from the calling method, then it should wait for the thread to finish, which makes using threads a bit pointless.
Which function is used to return a value from the thread back to the main process in C?
and then in main: printf(“%d\n”,(int)status); If you need to return a complicated value such a structure, it’s probably easiest to allocate it dynamically via malloc() and return a pointer. Of course, the code that initiated the thread will then be responsible for freeing the memory.
Can Python thread return value?
Threading in Python is simple. It allows you to manage concurrent threads doing work at the same time. Returning values from threads is not possible and, as such, in this example we pass in a globally accessible (to all threads) “results” array with the index of the array in which to store the result once fetched.
Can Run method return value in Java?
Return value : Return type of Runnable run() method is void , so it can not return any value. while Callable can return the Future object, which represents the life cycle of a task and provides methods to check if the task has been completed or canceled. 3.
How does a thread return a value in C++?
Using C++11 threads, one can’t get the return value as thread exit which used to be the case with pthread_exit(…) You need to use C++11 Future<> to get the return value. Future is created using templated argument where the template takes the return value (built in of User Defined types)..
Is callable a thread?
Callable , represents an asynchronous task which can be executed by a separate thread. For instance, it is possible to submit a Callable object to a Java ExecutorService which will then execute it asynchronously.
What is the function of thread?
The following functions are used with threads. Attaches the input processing mechanism of one thread to that of another thread. Creates a thread that runs in the virtual address space of another process.
What is the use of Pthread_join () and Pthread_exit () function?
Description: The pthread_join() function blocks the calling thread until the target thread thread terminates, unless thread has already terminated. If value_ptr is non-NULL and pthread_join() returns successfully, then the value passed to pthread_exit() by the target thread is placed in value_ptr.
Is list thread safe in Python?
Although list under multithreading is thread-unsafe, it is thread-safe under the operation of append . Obviously, this method of operation is not universal. If the European spirit is too strong, there may be no abnormalities. The dis library is a library that comes with Python and can be used to analyze bytecode.
Can runnable return value?
With Runnable. The Runnable interface is a functional interface and has a single run() method which doesn’t accept any parameters and does not return any values.