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This is required to make some of llvm's api calls thread save. In particular the PassRegistry, which is implicitly accessed while compiling shader programs. The PassRegistry uses a mutex that is only active if the llvm_is_multithreaded() returns true. Calling llvm_start_multithreading() makes this happen and by calling this function we try to make sure that we can savely compile shaders in paralell. Since there is also a call llvm_stop_multithreading() in the llvm api, we cannot guarantee that this does not get switched off while we are relying on this being set, but for the easier use cases this fixes a race with the radeon llvm compiler we have as of today. Signed-off-by: Mathias Froehlich <Mathias.Froehlich@web.de> Signed-off-by: Tom Stellard <thomas.stellard@amd.com> |
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| common.py | ||
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File: docs/README.WIN32 Last updated: 23 April 2011 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons osmesa mesagdi to build classic mesa Windows GDI drivers; or 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. 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.