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When EGL is used on some other thread than the thread that drives the main wl_display queue, the Wayland EGL dri2 implementation is vulnerable to a race condition related to display round trips and global object advertisements. The race that may happen is that after after a proxy is created, but before the queue is set, events meant to be emitted via the yet to be set queue may already have been queued on the wrong queue. In order to make it possible to avoid this race, wayland 1.11 introduced new API that allows creating a proxy wrapper that may be used as the factory proxy when creating new proxies via Wayland requests. The queue of a proxy wrapper can be changed without effecting what queue events emitted by the actual proxy will be queued on, while still effecting what default queue proxies created from it will have. By introducing a wl_display proxy wrapper and using this when performing round trips (via wl_display_sync()) and retrieving the global objects (via wl_display_get_registry()), the mentioned race condition is avoided. Signed-off-by: Jonas Ådahl <jadahl@gmail.com> Cc: mesa-stable@lists.freedesktop.org Reviewed-by: Daniel Stone <daniels@collabora.com> |
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File: docs/README.WIN32 Last updated: 21 June 2013 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. Recipe ------ Building on windows requires several open-source packages. These are steps that work as of this writing. - install python 2.7 - install scons (latest) - install mingw, flex, and bison - install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe - install git - download mesa from git see http://www.mesa3d.org/repository.html - run scons General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.