All Questions
Tagged with c++ asynchronous
1,194
questions
1
vote
1
answer
41
views
async_read_some() operation not getting run even when socket has received data?
int main(int argc, char *argv[])
{
int acceptingCounter = 0;
std::array<char, 2048> message_buffer;
boost::asio::io_context io_context;
std::vector<tcp::endpoint * > ...
- 45
0
votes
1
answer
32
views
Boost asio, timer inside async_receive_from wont trigger
I am trying to write a small UDP proxy using Boost asio. Within it I need to read a socket, and if that socket receives a datagram, a callback should be triggered after a specific time, forwarding the ...
- 383
0
votes
2
answers
87
views
Why do we need async and io_context?
I'm studying multithreading, and I came across that it is preferable to use async() with io_context. But I don’t quite understand why they are needed. I re-read several documentations and watched many ...
- 11
0
votes
0
answers
93
views
Is there a way to read more than one network packer for async_read for ssl websockets?
I want to know whether there is a way in C++ to do an async read on ssl websocket and return more than 1 network packet from network card if available?
Apparently its not available in boost::beast, I ...
- 6,986
1
vote
0
answers
57
views
GitHub Runners issue with Visual Studio 2022? Segmentation fault with the simplest async program
I stumbled upon something that seems like a serious issue in GitHub's runner CI.
This code:
#include <future>
#include <cstdio>
int main()
{
auto handle = std::async(std::launch::...
- 4,043
0
votes
1
answer
51
views
concurrent async_write on the same strand
Here is an example: https://www.boost.org/doc/libs/1_74_0/libs/beast/example/websocket/server/chat-multi/websocket_session.cpp
You can see that they have some queue'ing logic in order to only have one ...
- 1,183
0
votes
1
answer
54
views
locking shared objects in a multi-threaded environment
The documentation here: https://1973.beastdocs.prtest.cppalliance.org/libs/beast/doc/html/beast/ref/boost__beast__websocket__stream.html
states
Sharedobjects:Unsafe. The application must also ensure ...
- 1,183
0
votes
0
answers
49
views
I wanted decompress .xz file in cpp using lzma in chunks i.e decompress some data and the read in async fashion
I am doing this using lzma strm decoder and maintain position variable till we have read the file and using seekg(postion) before decoding but
when second time function is called but I am receiving ...
0
votes
1
answer
60
views
What the fundamental difference between an async code polling a cancellation token and registering a callback to be executed when the caller requests?
I'm watching (not for the first time) Working with Asynchrony Generically: A Tour of C++ Executors (part 1 and 2), which is about P2300.
With respect to cancellation support, Eric Niebler says that ...
- 26.7k
2
votes
1
answer
60
views
boost asio: how to encapsulate strand properly
The design I want seems like fairly basic:
struct my_object {
explicit my_object(io_context& ctx)
: strand{make_strand(ctx)}
{
socket = make_unique<some_socket_like_object>(*...
- 7,686
0
votes
0
answers
76
views
ASIO async_read_some reading 0 bytes
Currently, I am using ASIO 1.10.8.
While reading the data, async_read_some is intermittently throwing EOF error with 0 bytes as read. This is observed to be sporadic and for a few websites only. (it ...
- 1
0
votes
1
answer
101
views
Proper syntax for a function that takes two functions with variable parameters?
I have a lot of async calls in my application. They retrieve data from a server and execute a callback with the retrieved data. I want to handle them them following way:
Execute function with ...
- 363
1
vote
1
answer
78
views
mock AsyncReadStream boost for unit tests
I am faced with a situation where we use http::async_read(...) and http::async_write(...) internally in a class that represents an HTTP session. However, if we want to unit test this class, we would ...
- 1,183
2
votes
1
answer
91
views
C++ multiple promises for one task
My use-case is rather common.
I have a class that performs some asynchronous operation: e.g. get some data asynchronously from a service;
I can have multiple requests (get_data calls) for that ...
- 21
4
votes
2
answers
162
views
How does io_uring fulfill asynchronus read?
Recently, I have been trying to incorporate async read into an existing feature and came around io_uring. I read the documentations present on internet and had the impression tht io_uring spawns a new ...
