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Using Boost in CLR Class
by 임성준 09 Jan '24

09 Jan '24

Hello, I have question about using Boost. I'm trying to using boost in clr class of Visual Studito 2022 When I build the project, I got following error Error C1189 #error: "This library now requires a C++11 or later compiler - this message was generated as a result of BOOST_NO_CXX11_REF_QUALIFIERS being set" ClassLibrary2 C:\Users\bussly\source\repos\ClassLibrary2\packages\boost.1.84.0\lib\native\include\boost\multiprecision\detail\check_cpp11_config.hpp 34 Error (active) E0035 #error directive: "This library now requires a C++11 or later compiler - this message was generated as a result of BOOST_NO_CXX11_REF_QUALIFIERS being set" ClassLibrary2 C:\Users\bussly\source\repos\ClassLibrary2\packages\boost.1.84.0\lib\native\include\boost\multiprecision\detail\check_cpp11_config.hpp 58 Even I didn't make any code, just add an include boost header. Following is the scenario of what I did - Visual Studio 2022 - Create new project -> CLR Class Library(.Net Framework) - Install NuGet Package -> boost 1.84.0 - Add include boost -> #include "boost/geometry.hpp" - Build solution - Error and following is properties of my project - Platform Toolset: Visual Studio 2022(v143) - C++ Language Standard: ISO C++ 20 Standard(/std:c++20) - C Language Standard: Default(Legacy MSVC) I tried with C++ 14 and C++ 17 also, but failed. Can I get any solution for this? Thank you.

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[Boost.Redis] Single Connection Concurrency Inquiry
by Samarah Uriarte 08 Jan '24

08 Jan '24

Hello, I am using the Boost Redis library to write to a local Redis server and would like to inquire about how a single connection can handle concurrent calls. I have several C++ classes that have their own Boost.Redis connections, but this is leading to ASIO-related hanging behavior that is difficult to debug. I would like to simplify the design by initializing only one connection that can be used by all of these classes instead. I know the "async_exec" method supports concurrency but I wonder if this might cause any future issues with larger workloads. Thank you in advance. Sincerely, Samarah Uriarte

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Problems downloading boost on Linux
by Gonzalo Garramuño 01 Jan '24

01 Jan '24

I have tried downloading boost 1.76 on Linux from Argentina with: curl -# -L -o boost_1_76_0.zip.tmp https://boostorg.jfrog.io/artifactory/main/release/1.76.0/source/boost_1_76… and also from the boost web page. This leads to a redirect to JFrog. I tried creating an account with both Google (which led to Invalid credentials - you might not be a registered MyJFrog user. Please try again. ) and with a new account on JFrog which sent me an email requesting my company: To confirm this request, please include the license owner or any other support contact associated with your company's subscription approval in this email thread. Are the boost libraries at www.boost.org available for free or only under subscription? I found I can still download them from sourceforge, of course, but I would need to patch any dependencies that point to the older web-site. -- Gonzalo Garramuño ggarra13(a)gmail.com

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Cobalt link error
by Josué Andrade Gomes 23 Dec '23

23 Dec '23

I'm trying to build a minimal Cobalt library sample. I'm getting link errors: Build and installed Boost with: ./bootstrap.sh --prefix=$HOME/.local ./b2 install Sample: #include <boost/cobalt.hpp> #include <iostream> boost::cobalt::main co_main(int, char *[]) { std::cout << "Hello world\n"; co_return 0; } CMakeLists.txt cmake_minimum_required(VERSION 3.20) project(coro_study) set(CMAKE_EXPORT_COMPILE_COMMANDS ON) set(CMAKE_CXX_STANDARD 20) set(CMAKE_VERBOSE_MAKEFILE ON) set(Boost_VERBOSE 1) set(Boost_DEBUG 1) find_package(Boost REQUIRED COMPONENTS system) add_executable(sample sample.cpp) target_include_directories(sample4 PRIVATE ${Boost_INCLUDE_DIRS}) target_link_libraries(sample4 PRIVATE ${Boost_LIBRARIES}) cmake output: dev ~/Projects/coroutines/x64-linux-debug $ cmake .. -- The C compiler identification is GNU 11.4.0 -- The CXX compiler identification is GNU 11.4.0 -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Check for working C compiler: /usr/bin/cc - skipped -- Detecting C compile features -- Detecting C compile features - done -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Check for working CXX compiler: /usr/bin/c++ - skipped -- Detecting CXX compile features -- Detecting CXX compile features - done -- Found Boost 1.84.0 at /home/dev/.local/lib/cmake/Boost-1.84.0 -- Requested configuration: QUIET REQUIRED COMPONENTS system -- BoostConfig: find_package(boost_headers 1.84.0 EXACT CONFIG REQUIRED QUIET HINTS /home/dev/.local/lib/cmake) -- Found boost_headers 1.84.0 at /home/dev/.local/lib/cmake/boost_headers-1.84.0 -- BoostConfig: find_package(boost_system 1.84.0 EXACT CONFIG REQUIRED QUIET HINTS /home/dev/.local/lib/cmake) -- Found boost_system 1.84.0 at /home/dev/.local/lib/cmake/boost_system-1.84.0 -- Boost toolset is gcc11 (GNU 11.4.0) -- Scanning /home/dev/.local/lib/cmake/boost_system-1.84.0/libboost_system-variant*.cmake -- Including /home/dev/.local/lib/cmake/boost_system-1.84.0/libboost_system-variant-shared.cmake -- [x] libboost_system.so.1.84.0 -- Including /home/dev/.local/lib/cmake/boost_system-1.84.0/libboost_system-variant-static.cmake -- [ ] libboost_system.a -- Adding boost_system dependencies: headers -- Found Boost: /home/dev/.local/lib/cmake/Boost-1.84.0/BoostConfig.cmake (found version "1.84.0") found components: system -- Configuring done -- Generating done -- Build files have been written to: /home/dev/Projects/coroutines/x64-linux-debug make output: dev ~/Projects/coroutines/x64-linux-debug $ make /usr/bin/cmake -S/home/dev/Projects/coroutines -B/home/dev/Projects/coroutines/x64-linux-debug --check-build-system CMakeFiles/Makefile.cmake 0 /usr/bin/cmake -E cmake_progress_start /home/dev/Projects/coroutines/x64-linux-debug/CMakeFiles /home/dev/Projects/coroutines/x64-linux-debug//CMakeFiles/progress.marks make -f CMakeFiles/Makefile2 all make[1]: Entering directory '/home/dev/Projects/coroutines/x64-linux-debug' make -f CMakeFiles/sample4.dir/build.make CMakeFiles/sample4.dir/depend make[2]: Entering directory '/home/dev/Projects/coroutines/x64-linux-debug' cd /home/dev/Projects/coroutines/x64-linux-debug && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/dev/Projects/coroutines /home/dev/Projects/coroutines /home/dev/Projects/coroutines/x64-linux-debug /home/dev/Projects/coroutines/x64-linux-debug /home/dev/Projects/coroutines/x64-linux-debug/CMakeFiles/sample4.dir/DependInfo.cmake --color= make[2]: Leaving directory '/home/dev/Projects/coroutines/x64-linux-debug' make -f CMakeFiles/sample4.dir/build.make CMakeFiles/sample4.dir/build make[2]: Entering directory '/home/dev/Projects/coroutines/x64-linux-debug' [ 50%] Building CXX object CMakeFiles/sample4.dir/sample4.cpp.o /usr/bin/c++ -DBOOST_SYSTEM_DYN_LINK -DBOOST_SYSTEM_NO_LIB -isystem /home/dev/.local/include -std=gnu++20 -MD -MT CMakeFiles/sample4.dir/sample4.cpp.o -MF CMakeFiles/sample4.dir/sample4.cpp.o.d -o CMakeFiles/sample4.dir/sample4.cpp.o -c /home/dev/Projects/coroutines/sample4.cpp [100%] Linking CXX executable sample4 /usr/bin/cmake -E cmake_link_script CMakeFiles/sample4.dir/link.txt --verbose=1 /usr/bin/c++ CMakeFiles/sample4.dir/sample4.cpp.o -o sample4 /home/dev/.local/lib/libboost_system.so.1.84.0 /usr/bin/ld: CMakeFiles/sample4.dir/sample4.cpp.o: in function `co_main(co_main(int, char**)::_Z7co_mainiPPc.Frame*) [clone .actor]': sample4.cpp:(.text+0x2a9): undefined reference to `boost::cobalt::detail::main_promise::final_suspend()' /usr/bin/ld: CMakeFiles/sample4.dir/sample4.cpp.o: in function `main::reset_res::operator()(std::pmr::memory_resource*)': sample4.cpp:(.text._ZZ4mainEN9reset_resclEPNSt3pmr15memory_resourceE[_ZZ4mainEN9reset_resclEPNSt3pmr15memory_resourceE]+0x1c): undefined reference to `boost::cobalt::this_thread::set_default_resource(std::pmr::memory_resource*)' /usr/bin/ld: CMakeFiles/sample4.dir/sample4.cpp.o: in function `main': sample4.cpp:(.text.main[main]+0x5b): undefined reference to `boost::cobalt::this_thread::set_default_resource(std::pmr::memory_resource*)' /usr/bin/ld: sample4.cpp:(.text.main[main]+0xc2): undefined reference to `boost::cobalt::detail::main_promise::run_main(boost::cobalt::main)' /usr/bin/ld: CMakeFiles/sample4.dir/sample4.cpp.o: in function `bool boost::cobalt::detail::promise_receiver<void>::awaitable::await_suspend<boost::cobalt::detail::fork::promise_type>(std::__n4861::coroutine_handle<boost::cobalt::detail::fork::promise_type>)': sample4.cpp:(.text._ZN5boost6cobalt6detail16promise_receiverIvE9awaitable13await_suspendINS1_4fork12promise_typeEEEbNSt7__n486116coroutine_handleIT_EE[_ZN5boost6cobalt6detail16promise_receiverIvE9awaitable13await_suspendINS1_4fork12promise_typeEEEbNSt7__n486116coroutine_handleIT_EE]+0x7f): undefined reference to `boost::cobalt::detail::already_awaited()' /usr/bin/ld: CMakeFiles/sample4.dir/sample4.cpp.o: in function `boost::cobalt::detail::promise_receiver<void>::awaitable::interrupt_await() &': sample4.cpp:(.text._ZNR5boost6cobalt6detail16promise_receiverIvE9awaitable15interrupt_awaitEv[_ZNR5boost6cobalt6detail16promise_receiverIvE9awaitable15interrupt_awaitEv]+0x33): undefined reference to `boost::cobalt::detail::detached_exception()' collect2: error: ld returned 1 exit status make[2]: *** [CMakeFiles/sample4.dir/build.make:101: sample4] Error 1 make[2]: Leaving directory '/home/dev/Projects/coroutines/x64-linux-debug' make[1]: *** [CMakeFiles/Makefile2:86: CMakeFiles/sample4.dir/all] Error 2 make[1]: Leaving directory '/home/dev/Projects/coroutines/x64-linux-debug' make: *** [Makefile:94: all] Error 2

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Handshake Error 10009
by Jens Kallup 23 Dec '23

23 Dec '23

Hello, I tried use the boost::asio to create a SSL-Server, but I fail. The Code I used is attached to this Text. acceptor_ and context_ give me true result, but the start_accept() methode give me a Handshake-Error: 10009 (invalid descriptor handle). How can I avoid this, and how can I fix the Code in the right point ? Thanks for reading paule32 // ----------------------------------------------------------------- // File: BoostServer.cc // Author: (c) 2023 Jens Kallup - paule32 // All rights reserved // // only for education, and non-profit usage ! // ----------------------------------------------------------------- # include <stdio.h> # include <stdlib.h> # include <sys/types.h> # include <iostream> # include <string> # include <functional> # include <thread> # include <memory> # include <boost/asio.hpp> # include <boost/asio/ssl.hpp> using namespace boost::asio; using namespace std; // ----------------------------------------------------------------- // @brief namespace name for Version 1.0.0 of our project ... // ----------------------------------------------------------------- namespace dBaseRelease { std::string ApplicationExeName; // ----------------------------------------------------------------- // @brief This member handle the exception message text that is use // to "try catch" exception's during the runtime of the // application. // // @param std::string& message - The e.what() message. // @return nothing // // @since dBaseRelease // @author paule32 // ----------------------------------------------------------------- void handle_exception(const std::string& message) { std::string error_message; for (int len = 0; len < message.length(); ++len) { if (message[len] == '[') break; error_message.push_back(message[len]); } std::cerr << "Exception " << error_message << std::endl; } class SSLServer: public std::enable_shared_from_this<SSLServer> { public: SSLServer(io_service& service, uint16_t port): acceptor_(service, ip::tcp::endpoint(ip::tcp::v4(), port)), context_ (ssl::context::tlsv12) { context_.set_options( ssl::context::default_workarounds | ssl::context::sslv2 | ssl::context::sslv3 | ssl::context::tlsv12); if (isAcceptorInitialized() && isContextInitialized ()) { std::cout << "acceptor ok" << std::endl; std::cout << "context ok" << std::endl; start_accept(); } else { std::cout << "server init error" << std::endl; } } private: void start_accept() { ssl_socket_ = std::make_shared<ssl::stream<ip::tcp::socket> >(acceptor_.get_executor(), context_); // ---------------------------------- // Starte den asynchronen Handshake // ---------------------------------- ssl_socket_->async_handshake(ssl::stream_base::server, [this](const boost::system::error_code& error) { if (!error) { // ----------------------------------- // Wenn der Handshake erfolgreich ist, // akzeptiere die Verbindung // ----------------------------------- if (ssl_socket_ && ssl_socket_->lowest_layer().is_open()) { std::cout << "SSL-Handshake erfolgreich und verbunden." << std::endl; acceptor_.async_accept(ssl_socket_->lowest_layer(), [this](const boost::system::error_code& accept_error) { if (!accept_error) { handle_client(); } else { std::cerr << "Accept error: " << accept_error.message() << std::endl; } }); } else { std::cerr << "SSL-Handshake erfolgreich, aber Verbindung nicht geöffnet." << std::endl; } } else { std::cerr << "Handshake error: " << error.message() << " (" << error.value() << ")" << std::endl; } }); } void handle_client() { // ------------------------------------ // Lese/Schreibe Daten mit ssl_socket_ // ------------------------------------ boost::asio::async_read_until(*ssl_socket_, buffer_, '\n', [this](const boost::system::error_code& read_error, std::size_t bytes_transferred) { if (!read_error) { std::istream is(&buffer_); std::string received_data; std::getline(is, received_data); std::cout << "Received data from client: " << received_data << std::endl; // ----------------------------------------- // Hier kannst du auf die empfangenen Daten // reagieren und die Antwort vorbereiten // ----------------------------------------- std::string response = "Hello from the server!\n"; // ----------------------------------------- // Sende die Antwort an den Client // ----------------------------------------- boost::asio::async_write(*ssl_socket_, boost::asio::buffer(response), [this](const boost::system::error_code& write_error, std::size_t) { if (!write_error) { // ----------------------------- // Schließe die Verbindung // ----------------------------- ssl_socket_->lowest_layer().close(); // ----------------------------- // Starte die nächste Akzeptanz // ----------------------------- start_accept(); } else { std::cerr << "Write error: " << write_error.message() << std::endl; } }); } else { std::cerr << "Read error: " << read_error.message() << std::endl; } }); } // ------------------------------------------------ // Überprüfung, ob der Acceptor initialisiert wurde // ------------------------------------------------ bool isAcceptorInitialized() const { return acceptor_.is_open(); } // ------------------------------------------------ // Überprüfung, ob der Context initialisiert wurde // ------------------------------------------------ bool isContextInitialized() { try { // ---------------------------------- // load certificate, and private key // ---------------------------------- context_.use_certificate_chain_file("server.crt.pem"); context_.use_private_key_file("server.key.pem", ssl::context::pem); return true; } catch (const boost::system::system_error& e) { handle_exception(e.what()); return false; } } private: ip::tcp::acceptor acceptor_; ssl::context context_; std::shared_ptr<ssl::stream<ip::tcp::socket>> ssl_socket_; boost::asio::streambuf buffer_; }; } // namespace: dBaseRelease int main(int argc, char **argv) { using namespace dBaseRelease; try { ApplicationExeName = argv[0]; io_service service; std::shared_ptr<SSLServer> server = std::make_shared<SSLServer>(service, 12345); service.run(); } catch (const std::exception& e) { std::cerr << "Exception: " << e.what() << std::endl; return EXIT_FAILURE; } return EXIT_SUCCESS; } -- Diese E-Mail wurde von Avast-Antivirussoftware auf Viren geprüft. www.avast.com

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Abwesenheitsnachricht: Re: Cobalt link error
by Sören Textor 23 Dec '23

23 Dec '23

Derzeit bin ich nicht im Hause Ihre E-Mail wird nicht weitergeleitet. In dringenden Fällen bitte support(a)ditec-gmbh.de oder Telefonhotline +49-6221-31698-110 oder die Zentrale +49-6221-31698-0 kontaktieren. Mit freundlichen Grüßen Dr. Sören Textor ----------------------------------------------- DiTEC Dr. Siegfried Kahlich & Dierk Langer GmbH Im Breitspiel 19 | 69126 Heidelberg | Germany Handelsregister | Mannheim | HRB 341229 Dieses Dokument ist vertraulich zu behandeln. Die Weitergabe, sowie Vervielfältigung, Verwertung und Mitteilung seines Inhalts ist nur mit unserer ausdrücklichen Genehmigung gestattet. Alle Rechte vorbehalten, insbesondere für den Fall der Schutzrechtsanmeldung. This document has to be treated confidentially. Its contents are not to be passed on, duplicated, exploited or disclosed without our express permission. All rights reserved, especially the right to apply for protective rights.

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Boost Asio Multicast
by Georg Gast 18 Dec '23

18 Dec '23

Hi there, I wrote an application that is to a good part based on https://www.boost.org/doc/libs/1_83_0/doc/html/boost_asio/example/cpp11/mul… https://www.boost.org/doc/libs/1_83_0/doc/html/boost_asio/example/cpp11/mul… It worked OK on my laptop as the packages arrived in my vm and my host. As we tried it on real machines the packages did not arrive. (all windows machines). With *netsh interface ip show joins* I could see on my laptop that the join was on the ethernet card. On the real machines it choose "the wrong" network card. I tried with "outbound_interface" to change it but didn't work... It's all ipv4. Can or should I use a static route to get the packages into the right net segment? Bye Georg

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[Boost.Asio] Asynchronous queue?
by accelerator0099 16 Dec '23

16 Dec '23

Consider the producer-consumer model: producer -+- consumer1 +- consumer2 +- consumer3 +- consumer4 +- consumer5 The producer periodly push items into a queue, and those consumers wait on that queue for items It's easy to implement in a synchronous, multi-threaded environment: the producer just locks the queue and push into it, and notify one consumer through a condition variable. Consumers waiting on that condition variable will be woken one by one, popping items and consume them How to do those in a asynchronous environment? Consumers async_pop() on that queue, posting their completion tokens into the executor. When there are items available, the executor notify one consumer by calling its completion token Is it right? How do the producer tell the executor "The asynchronous operation is done, You should call that completion token"? My implemention of a possible async queue (based on timers): #include <boost/asio.hpp> #include <deque> #include <iostream> using namespace std::literals; namespace io = boost::asio; using io::awaitable; auto& uawait = io::use_awaitable; template<class D> awaitable<void> delay(const D& dur) { io::steady_timer tm{ co_await io::this_coro::executor }; tm.expires_after(dur); co_await tm.async_wait(uawait); } template<class T> class aqueue { std::deque<T> mq; public: using reference = T&; using const_reference = const T&; size_t size() const noexcept { return mq.size(); } bool empty() const noexcept { return mq.empty(); } awaitable<T> async_pop() { while (empty()) { co_await delay(1ms); } auto t = std::move(mq.front()); mq.pop_front(); co_return t; } awaitable<void> async_push(T t) { mq.push_back(std::move(t)); co_return; } }; class consumer { public: const int id; aqueue<int>& queue; consumer(int _i, aqueue<int>& _q) : id{ _i }, queue{ _q } {} awaitable<void> operator()() { std::cout << "Consumer " << id << " started\n"; auto i = co_await queue.async_pop(); std::cout << "Consumer " << id << " got " << i << '\n'; } }; int main() { io::io_context ctx; aqueue<int> aq; auto producer = [&]() -> awaitable<void> { std::cout << "Producer started\n"; for (int i{}; i != 5; ++i) { co_await delay(1s); co_await aq.async_push(i); } }; io::co_spawn(ctx, producer, io::detached); for (int i{}; i != 5; ++i) io::co_spawn(ctx, consumer{ i, aq }, io::detached); std::cout << "RUN\n"; ctx.run(); return 0; } Is it a proper way to do so using timers? I think there should be a better way

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Fin boost with cmake in config mode
by Alain O' Miniussi 15 Dec '23

15 Dec '23

Hi, I'd like to find Boost 1.84 from cmake 3.28 in config mode (https://cmake.org/cmake/help/latest/command/find_package.html#id6) My Boost distribution is in a non standard location <mypath> meaning, IF i UNDERSTAND CORRECTLY, that cmake will try to set Boost_DIR to <mypath>/lib/cmake/Boost-1.84.0/BoostConfig.cmake. Which environnement should I set so that it works ? Thanks ---- Alain Miniussi DSI, Pôles Calcul et Genie Log. Observatoire de la Côte d'Azur Tél. : +33609650665

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Cobalt documentation error
by Josué Andrade Gomes 14 Dec '23

14 Dec '23

I’m seeing the following error while browsing the recently released Cobalt library documentation [1]: Failed to generate image: mmdc failed: Error: Failed to launch the browser process! /root/.cache/puppeteer/chrome/linux-1108766/chrome-linux/chrome: error while loading shared libraries: libatk-1.0.so.0: cannot open shared object file: No such file or directory TROUBLESHOOTING: https://pptr.dev/troubleshooting at Interface.onClose (file:///root/.nvm/versions/node/v18.18.1/lib/node_modules/@mermaid-js/mermaid-cli/node_modules/@puppeteer/browsers/lib/esm/launch.js:253:24) at Interface.emit (node:events:529:35) at Interface.close (node:internal/readline/interface:534:10) at Socket.onend (node:internal/readline/interface:260:10) at Socket.emit (node:events:529:35) at endReadableNT (node:internal/streams/readable:1368:12) at process.processTicksAndRejections (node:internal/process/task_queues:82:21) [1] https://www.boost.org/doc/libs/1_84_0/libs/cobalt/doc/html/index.html

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Re: [Boost-users] Could sprintf be replaced with snprintf?
by Matt Borland 14 Dec '23

14 Dec '23

> On Dec 13, 2023, at 9:32 PM, Karsten Ahnert <karsten.ahnert(a)gmx.de> wrote: > > Yes, please go on. It would be great if odeint will be maintained in the future. Thank you! > > What are your GitHub user names? I can add you as maintainer but I want to be sure to use right name and avoid a potential name collision. > > Karsten Karsten, My GitHub username is mborland (https://github.com/mborland) and Nick is NAThompson (https://github.com/NAThompson) Let me know if you need anything else. Thanks, Matt

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[release] Boost 1.84.0
by Marshall Clow 14 Dec '23

14 Dec '23

Release 1.84.0 of the Boost C++ Libraries is now available. These open-source libraries work well with the C++ Standard Library, and are usable across a broad spectrum of applications. The Boost license encourages both commercial and non-commercial use. This release contain two new libraries, numerous enhancements and bug fixes for existing libraries. For details, including download links, see <http://www.boost.org/users/news/version_1.84.0> You can also download directly from: <https://boostorg.jfrog.io/artifactory/main/release/1.84.0/source> To install this release on your system, see <http://www.boost.org/doc/libs/release/more/getting_started/index.html> Thanks to everyone who participated in this release. -- The Boost Release Team Marshall Clow, Glen Fernandes

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Re: [Boost-users] Could sprintf be replaced with snprintf?
by McGrath, Justin M 13 Dec '23

13 Dec '23

Has there been any movement on having someone else maintain ODEINT? I don't know that I would be of much use, but I'm willing to help where I can. There is one other issue that isn't critical, but it would save our group from having to do some hand editing of ODEINT for use with our project. Some of the paths are long enough that after they're included in our project they have nonportable lengths, requiring use to rename them. I made an issue last year: https://github.com/boostorg/odeint/issues/54. Changing the names would surely break code, and I don't know if this is a feasible change. Given that it's pretty easy for people to update include directives though, maybe it's not too intrusive. If it's a welcome change, I can submit a PR on GitHub. Best wishes, Justin ________________________________________ From: McGrath, Justin M <jmcgrath(a)illinois.edu> Sent: Monday, December 4, 2023 11:53 AM To: Matt Borland; Karsten Ahnert Cc: mario.mulansky(a)gmx.net; Nick Thompson Subject: Re: [Boost-users] Could sprintf be replaced with snprintf? Thank you everyone. It would be great if someone could continue managing the package. It's a great resource. Best wishes, Justin ________________________________________ From: Matt Borland <matt(a)mattborland.com> Sent: Friday, December 1, 2023 2:04 AM To: Karsten Ahnert Cc: McGrath, Justin M; mario.mulansky(a)gmx.net; Nick Thompson Subject: Re: [Boost-users] Could sprintf be replaced with snprintf? > On Nov 30, 2023, at 9:27 PM, Karsten Ahnert <karsten.ahnert(a)gmx.de> wrote: > > Merged the pull request. We are not actively maintaining the library anymore. > > But I will keep an eye on any upcoming changes. > Karsten, Thanks. Would you be interested in new maintainers stepping in for the library? Nick Thompson (cced) and I are maintainers on several other Boost libraries (math, multiprecision, random, and test), and we would be interested in helping out. He’s a mathematician, and I am a full-time Boost developer. If you would like to schedule a call or anything to discuss we can do that. Matt

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coroutine condition_variable
by Keith Bennett 07 Dec '23

07 Dec '23

I'm using asio's awaitable. Couroutines are pretty neat. One of the things that keeps cropping up in the ability to notify another function that something has finished. In the past, I would use condition_variable and wait on that. Is there a better way to do that with coroutines? eg, I want to do something like: asio::awaitable<void> function(std::mutex& mtx, condition_variable& cv) { std::unique_lock lock{mtx}; // suspend this function until notified or 30 seconds expired auto expired = co_await cv.wait_until(lock, std::chrono::seconds(30)); if (expired) { // or something log("expired"); co_return; } do_some_work(); } then somewhere else I might do: asio::awaitable<void> somewhere_else(condition_variable& cv) { do_other_work(); cv.notify_one(); } I understand that it's a bad idea to hold a lock during co_await. What other problems prevent something like this from being created? Does something like this already exist? It's not clear from asio reference. I'm using boost 1.81.0 but I can upgrade if that is a problem -- Keith Bennett

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[python] to_python_converter , is by value needed?
by MM 04 Dec '23

04 Dec '23

Hello, I have posted a question here some time ago, I thought to try here as well https://stackoverflow.com/questions/77552946/to-python-converter-is-by-valu… The community of experts in boost.python seems to have moved off to other concerns? Rds,

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Could sprintf be replaced with snprintf?
by McGrath, Justin M 30 Nov '23

30 Nov '23

I am using some Boost libraries in a code base that does not want any use of sprintf. An automatic test flags any calls to it or vsprintf. Is it possible to replace all uses of sprintf with snprintf? I really doubt there are actually any security issues here, but I'm hoping this wouldn't be too difficult or cause any problems other than the effort to do it. Cheers, Justin

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[Boost.Test] Saving Context Information for Failed Test Cases
by Bingtao Yin 16 Nov '23

16 Nov '23

I am a user of Boost.Test, and I am currently looking for a way to record some context information when dealing with failed test cases. Specifically, I would like to save certain variables to a file to facilitate debugging Could you please advise on any methods or recommendations within Boost.Test to fulfill this requirement? Are there any best practices or example code snippets that you could share? Thank you very much for your assistance! Best regards,

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Re: [Boost-users] Problem with named_mutex on Windows
by David C. Partridge 15 Nov '23

15 Nov '23

I just realised it's not hanging - it's thrown an interprocess exception. I have revised my code to capture and report on that. I will let you know what it says. David From: David C. Partridge <david.partridge(a)perdrix.co.uk> Sent: 13 November 2023 14:16 To: 'boost-users(a)lists.boost.org' <boost-users(a)lists.boost.org> Subject: Problem with named_mutex on Windows I have a user reporting that the following code in my application's main() hangs unless he uses "Run as Adminstrator": ZTRACE_RUNTIME("Checking Mutex"); bip::named_mutex dssMutex{ bip::open_or_create, "DeepSkyStacker.Mutex.UniqueID.12354687" }; bip::scoped_lock<bip::named_mutex> lk(dssMutex, bip::defer_lock); const bool firstInstance{ lk.try_lock() }; ZTRACE_RUNTIME(" firstInstance: %s", firstInstance ? "true" : "false"); The trace shows "Checking mutex" and then it all stops. Is my code in error and if so what do I need to change? If not, how can I determine what the problem is? On a related issue: I think that this is C++ Exception safe, as the mutex will be unlocked and deleted. However, if a C exception occurs then how should I clean up? Is the named_mutex persistent over reboots? If so, where is it held (in case I need to do a manual cleanup). Many thanks David

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Problem with named_mutex on Windows
by David C. Partridge 13 Nov '23

13 Nov '23

I have a user reporting that the following code in my application's main() hangs unless he uses "Run as Adminstrator": ZTRACE_RUNTIME("Checking Mutex"); bip::named_mutex dssMutex{ bip::open_or_create, "DeepSkyStacker.Mutex.UniqueID.12354687" }; bip::scoped_lock<bip::named_mutex> lk(dssMutex, bip::defer_lock); const bool firstInstance{ lk.try_lock() }; ZTRACE_RUNTIME(" firstInstance: %s", firstInstance ? "true" : "false"); The trace shows "Checking mutex" and then it all stops. Is my code in error and if so what do I need to change? If not, how can I determine what the problem is? On a related issue: I think that this is C++ Exception safe, as the mutex will be unlocked and deleted. However, if a C exception occurs then how should I clean up? Is the named_mutex persistent over reboots? If so, where is it held (in case I need to do a manual cleanup). Many thanks David

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Optimizing serialization of std containers
by Gidi Gal 05 Nov '23

05 Nov '23

Hello, Are there any settings or additional code required to optimize the serialization of std containers ? I serialize a nested container: std::vector<std::deque<int>>. The max size of each deque entry is 20. I include boost/serialization/deque.hpp and boost/serialization/vector.hpp and I serialize the container in the following way: std::ofstream ofs(outFileName); boost::archive::binary_oarchive oa(ofs); oa << data; I created data with 10600 integers in the deque. The size of the serialized output file is 54493. Now, I test an alternate serialization. I serialized the size of the vector and then per each entry I serialize its size, which cannot be more than 20, so char is enough for that, next I serialize the integers in this entry. The size of the serialized output file is 43484. Is there a way to achieve better results for the default serialization ? Thanks, Gidi

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why diagnostic_information is std::exception::what: Unknown exception
by Bernard 30 Oct '23

30 Oct '23

greetings kind regards may i please inquire how not to obtain "std::exception::what: Unknown exception" from diagnosic_inforumation() . my meaning is to inquire how to obtain as per example on boost web page https://www.boost.org/doc/libs/1_83_0/libs/exception/doc/tutorial_diagnosti… output : "std::exception::what: example_io error" id est where did "example_io error" come from as neither boost::exception nor std:::exception accept constructor string arguments . please my code below . thank you kindly #include "stl" // #includes all stl #include files #include "boost\exception\all.hpp" using namespace std; struct ceXception : virtual boost::exception, virtual std::exception { using this_type = ceXception; ceXception() {} auto what() { cerr << __FUNCSIG__ << endl; return string("return from " + string(__FUNCSIG__)); } template<typename charType> friend std::basic_ostream<charType>& operator<<(std::basic_ostream<charType>& _ostream, const this_type&) { cerr << "to cerr from " << __FUNCSIG__ << endl; _ostream << "to ostream from " << __FUNCSIG__ << endl; return _ostream; } }; void foo() { try { BOOST_THROW_EXCEPTION(ceXception()); } catch (ceXception& e) { cerr << boost::diagnostic_information(e); } } int main() { foo(); return 0; }

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Async review scheduled for September 22, 2023 - October 2, 2023
by Mateusz Loskot 07 Sep '23

07 Sep '23

Hi, Following request from Nial and Klemens, we have scheduled new round of the Async review for September 22, 2023 - October 2, 2023 https://www.boost.org/community/review_schedule.html Best regards, -- Mateusz Loskot, on behalf of the Review Wizards

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Error LNK1104 cannot open file 'boost_unit_test_framework-vc143-mt-x64-1_82.lib' cal_data_gain_pwr_test C:\Users\mushtaq.syed\Downloads\uhd-master\host\build\tests\LINK 1
by Mushtaq A. Syed, Ph.D. 28 Aug '23

28 Aug '23

Hi: My project uses the Boost library. I have installed C:\Program Files\Boost\boost_1_82_0. I also built using the bootstrap and .\b2 commands from the command window. This was because all the libboost libraries in C:\Program Files\Boost\boost_1_82_0\stage\lib were missing. Now when I build my code using Visual Studio 2022, I am getting the above error. I searched my Boost root folder and cannot find boost_unit_test_framework-vc143-mt-x64-1_82.lib; however, I do see libboost_unit_test_framework-vc143-mt-x64-1_82.lib and other libboost libraries but not a single boost library. I don’t know why it is looking for boost_unit_test_framework-vc143-mt-x64-1_82.lib and not libboost_unit_test_framework-vc143-mt-x64-1_82.lib. Could you please help resolve this? Thanks a lot! Cheers, Mushtaq ---------------------------- Mushtaq Syed, Ph.D. Principal Digital Signal Processing Engineer Verus Research [cid:image5fd716.JPG@ebfac5a4.47a0da54]<http://> Direct 505-396-7109 Cell 408-514-7821 6100 Uptown Blvd NE, Suite 260 Albuquerque, New Mexico 87110 verusresearch.net ---------------------------- NOTICE: This electronic mail message is intended exclusively for the individual or entity to which it is addressed. This message, together with any attachment, may contain sensitive or privileged information. Any unauthorized review, use, printing, retention, copying, disclosure, or distribution of said email is strictly prohibited. If you have received this message in error, please (1) immediately advise the sender by reply email message and (2) delete all copies of this message

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Quadmath.h not found for float128 arm64 rocky linux
by David Frank 25 Aug '23

25 Aug '23

When compile with boost float128 on arm64 rocky linux, i got a failure of missing quadmath.h Thanks.

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[Compiler] Boost compatibility in a untested compiler version
by Kankanamge, Gimhani 17 Aug '23

17 Aug '23

Hi team, Based on release notes for boost 1.83.0, there is a list of tested compilers (https://www.boost.org/users/history/version_1_83_0.html) But, we are going to use boost 1.83.0 in a different compiler which is not listed here(GCC 8.5.0). In such a case, what is the approach we should use to verify that boost is compatible in our given platform? Thank you. Gimhani Uthpala ------------------------------------------------------------------------------------------------------------ Please read these warnings and restrictions: This e-mail transmission is strictly confidential and intended solely for the ordinary user of the e-mail address to which it was addressed. It may contain legally privileged and/or CONFIDENTIAL information. The unauthorised use, disclosure, distribution and/or copying of this e-mail or any information it contains is prohibited and could, in certain circumstances, constitute a criminal offence. If you have received this e-mail in error or are not an intended recipient please inform London Stock Exchange Group (“LSEG”) immediately by return e-mail or telephone 020 7797 1000. LSEG may collect, process and retain your personal information for its business purposes. For more information please see our Privacy Policy. We advise that in keeping with good computing practice the recipient of this e-mail should ensure that it is virus free. We do not accept responsibility for any virus that may be transferred by way of this e-mail. E-mail may be susceptible to data corruption, interception and unauthorised amendment, and we do not accept liability for any such corruption, interception or amendment or any consequences thereof. Calls to London Stock Exchange Group may be recorded to enable LSEG to carry out its regulatory responsibilities. For more details on the LSEG group of companies click here London Stock Exchange Group plc 10 Paternoster Square London EC4M 7LS Registered in England and Wales No 05369106 ------------------------------------------------------------------------------------------------------------

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