got3nks
44efecda41
Dispatch() resolves the handler through a map keyed by the descriptor stored in epoll_event::data, which means taking a lock for every event dispatched, on the thread running the event loop. Point epoll_event::data.ptr at a small dispatcher-owned entry holding the handler instead. Unregistering clears the handler in the entry rather than freeing it, since a batch being dispatched may still point at one, so the entries live as long as the dispatcher and are indexed by descriptor. Dispatch() then reaches the handler through the pointer epoll_wait() gave back and never looks at the container at all, so it takes no lock. The lock that remains guards only the growth of the vector, from registrations made on worker threads. This also makes the RegisterFD()/ModifyFD() disagreement noted in the map version a non-issue: an entry is created on demand by either path. No behaviour change, and the test added with the map version passes unchanged. Closes #26930.
About
wxWidgets is a free and open source cross-platform C++ framework for writing advanced GUI applications using native controls.
wxWidgets allows you to write native-looking GUI applications for all the major desktop platforms and also helps with abstracting the differences in the non-GUI aspects between them. It is free for the use in both open source and commercial applications, comes with the full, easy to read and modify, source and extensive documentation and a collection of more than a hundred examples. You can learn more about wxWidgets at https://www.wxwidgets.org/ and read its documentation online at https://docs.wxwidgets.org/
Platforms
This version of wxWidgets supports the following primary platforms:
- Windows 7, 8, 10 and 11 (32/64 bit Intel and ARM64).
- Most Unix variants using the GTK+ toolkit (version 2.6 or newer or 3.x).
- macOS (10.10 or newer) using Cocoa under both amd64 and ARM platforms.
All C++11 compilers are supported including but not limited to:
- Microsoft Visual C++ 2015 or later (up to 2026).
- g++ 4.8 or later (up to 15), including MinGW/MinGW-64/TDM under Windows.
- Clang (up to 19/Xcode 16).
Please use 3.2 branch if you must use wxWidgets with a C++98 compiler or support Windows XP.
Licence
wxWidgets licence is a modified version of LGPL explicitly allowing not distributing the sources of an application using the library even in the case of static linking.
Building
For building the library, please see platform-specific documentation under
docs/<port> directory, e.g. here are the instructions for
wxGTK, wxMSW and
wxOSX.
If you're building the sources checked out from Git, and not from a released version, please see these additional Git-specific notes.
Contributing
Contributions to wxWidgets are always welcome, please don't hesitate to submit your patches or pull requests! If you are not sure how to do this, please check our guidelines explaining it.
Not all contributions have to be code, you can also help by improving documentation or translations, for which we have a separate page with more details.
Thank you in advance for your help in making wxWidgets better!
Further information
If you are looking for community support, you can get it from
- Mailing Lists
- Discussion Forums
- #wxwidgets IRC channel
- Stack Overflow
(tag your questions with
wxwidgets) - And you can report bugs at GitHub
Commercial support is also available.
Finally, keep in mind that wxWidgets is an open source project collaboratively developed by its users and your contributions to it are always welcome. Please check our guidelines if you'd like to do it.
Have fun!
The wxWidgets Team.