Questions tagged [stdthread]
std::thread is a C++11 standard library class which represents a single thread of execution. Threads allow multiple functions to execute concurrently.
stdthread
617
questions
-4
votes
0
answers
56
views
Unusual Access Violation when joining a thread [closed]
When terminating my program, the many components join their threads and this particular one gives me an access violation when joined along with other components at the same time.
The code is simple - ...
- 1,011
0
votes
1
answer
71
views
QProcess and std::thread - Cannot create children for a parent that is in a different thread
I am getting a run-time message
QObject: Cannot create children for a parent that is in a different thread.
when starting a QProcess in a std::thread. The program runs, but I feel that this message ...
- 1,498
0
votes
1
answer
95
views
Virtual memory size increases considerably with thread count
In the below C++ code example, each time the user presses the Enter key, a new thread will be created. The thread waits for 10 minutes and then exits. The thread has a std::string object with some ...
- 87
1
vote
1
answer
81
views
C++ Concurrency - memory_order_acquire [duplicate]
#include <atomic>
#include <thread>
std::vector<int> queue_data;
std::atomic<int> count;
void populate_queue()
{
unsigned const number_of_items=20;
queue_data.clear();
...
- 110
2
votes
2
answers
69
views
How to spawn a single thread with OpenMP (like a std::thread()) and use "#pragma omp single" and "#pragma omp for" afterwards?
I would simply like to spawn a background thread, like std::thread, but just with OpenMP.
Is this possible?
If yes, how ist it done?
To better explain what I want to achieve, here the C++ Code of what ...
- 75
3
votes
1
answer
121
views
Why should I not pass a lambda with by-reference captures to the std::thread constructor?
I wrote a timer class, but it does not work the way I needed it to. Can anyone tell me what is wrong with this?
template<typename D, typename C>
class timer
{
public:
timer(D period, C&&...
- 41
2
votes
1
answer
170
views
Not able to stop jthread using stop_token
very new to posting here, so apologies if it's in the wrong place.
I'm a hobby coder, so my experience is limited and while I learned C++ some years ago, I have to re-learn it periodically. Now is ...
- 35
0
votes
1
answer
64
views
recv doesn't work in a thread - Windows c++
I'm currently developing a TCP server and I use multi threading, so for this I init a server using a Server.start() which give me a fd like and then I init an infinite loop to accept and start new ...
- 25
4
votes
3
answers
184
views
What happens with a thread's arguments if thread creation fails?
Imagine I create a thread like this:
jthread thr( []( string &&str ) {}, move( str ) );
What happens if the thread creation fails ? Is the string guaranteed to keep its old contents ?
0
votes
1
answer
55
views
c++ thread: wrap thread function in lambda
#include <iostream>
#include <thread>
class MyClass {
public:
MyClass(int val) : val_(val) {}
int val_{0};
};
void threadFunction(MyClass myObj) {
// do ...
- 59
0
votes
1
answer
76
views
c++ thread function accepting object by value: why does std::ref(obj) compile?
#include <iostream>
#include <thread>
template<int Num>
class MyClass {
public:
MyClass(int val) : val_(val) {}
// Copy constructor
MyClass(const MyClass& other) : ...
- 59
1
vote
0
answers
171
views
Problem with g++ on Mac using std::thread and exceptions
this is my first question here, so feel free to ask for further information if needed.
EDIT: After the bot encouraged me to clarify my problem and state what I'd like to do: I would like to use C++ 20 ...
0
votes
0
answers
115
views
getting core dump in this simple threading program in C++
I'm new to concurrency in C++. I just tried creating new thread and tried running it.
But I'm getting memory fault(coredump) error.
Now able to find why it is causing memory fault. When I tried to ...
0
votes
0
answers
88
views
C++ lambda used in std::thread crash
This my code:
std::thread t([](){
int ret = func();
if (ret != 0){
return false;
}
});
t.detach();
As this code, compiler deduce the lambda return value type is bool, so when ret==0, the ...
- 19
0
votes
1
answer
123
views
What is wrong with this C++ multi-threaded program?
I write a multi-threaded C++ program using std::thread that looks like the following:
#include <iostream>
#include <thread>
#include <mutex>
#include <condition_variable>
using ...
