kc3-lang/libevent

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  • Hash : 227510d5
    Author : Vladislav Gusev
    Date : 2023-07-13T22:20:33 

    Fix EVDNS_BASE_DISABLE_WHEN_INACTIVE (#1493)

I faced with strange problem: event loop doesn't exit after dns resolving with
`EVDNS_BASE_DISABLE_WHEN_INACTIVE`.

Stand:
- Ubuntu 22;
- libevent release-2.1.12-stable
- `resolve.conf` contains 2 nameservers;
- I use `evdns_base_new` with `EVDNS_BASE_DISABLE_WHEN_INACTIVE | EVDNS_BASE_INITIALIZE_NAMESERVERS` to avoid OS specific code.

After small investigation, look like events related with dns sockets added to
event_base before `evdns->disable_when_inactive` was initialized. `libevent`
did epoll_ctl(DEL) after resolving completed on the first socket, but the
second socket remained in the `epoll` interest list.

  • README.md

  • libevent logo

    CI Coverage Status Join the chat at https://gitter.im/libevent/libevent doxygen

    1. BUILDING AND INSTALLATION

    CMake (Unix)

    mkdir build && cd build
cmake ..     # Default to Unix Makefiles.
make
make verify  # (optional)

    See Documentation/Building#Building on Unix using CMake for more information.

    CMake (Windows)

    Install CMake: https://cmake.org/

    md build && cd build
cmake -G "Visual Studio 10" ..   # Or use any generator you want to use. Run cmake --help for a list
cmake --build . --config Release # Or "start libevent.sln" and build with menu in Visual Studio.

    See Documentation/Building#Building on Windows for more information.

    Package Managers

    You can download and install libevent using the vcpkg dependency manager:

    git clone https://github.com/Microsoft/vcpkg.git
cd vcpkg
./bootstrap-vcpkg.sh
./vcpkg integrate install
./vcpkg install libevent

    The libevent port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please create an issue or pull request on the vcpkg repository.

    Autoconf

    Note, since 2.2 it is deprecated

    ./configure
make
make verify   # (optional)
sudo make install

    See Documentation/Building#Autoconf for more information.

    2. USEFUL LINKS:

    For the latest released version of Libevent, see the official website at https://libevent.org/ .

    There’s a pretty good work-in-progress manual up at http://www.wangafu.net/~nickm/libevent-book/ .

    For the latest development versions of Libevent, access our Git repository via

    $ git clone https://github.com/libevent/libevent.git

    You can browse the git repository online at:

    https://github.com/libevent/libevent

    To report bugs, issues, or ask for new features:

    Patches: https://github.com/libevent/libevent/pulls

    OK, those are not really patches. You fork, modify, and hit the “Create Pull Request” button. You can still submit normal git patches via the mailing list.

    Bugs, Features [RFC], and Issues: https://github.com/libevent/libevent/issues

    Or you can do it via the mailing list.

    There’s also a libevent-users mailing list for talking about Libevent use and development:

    https://archives.seul.org/libevent/users/

    3. ACKNOWLEDGMENTS

    The following people have helped with suggestions, ideas, code or fixing bugs.

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