Lua for windows luajit ffi

The luaffifb project seems generally dead and nonportable, while alien doesnt provide any sort of fancy interface, and im not aware of any others. Aug 28, 2014 luv is a lua bindung for the libuv library which means that it uses all the c api provided by the lua language to code the interface between c functions and lua functions. Luajit offers a very fast script interpreter and justintime compiler, in addition to several extensions to the base lua api. Discuss github, using source code to modify the engine, and the creation of engine plugins. If youve already embedded lua into your application, you probably dont need to do anything to switch to luajit, except link with a different library. These new lua bindings add optional support for luajit2s new ffi extension. Windows support would be even better if someone else contributed this, since i dont run windows. No unexpected code being generated that may present edgecase bugs which might be difficult to detect. Here we have a ffi binding which means that only the header of the c functions are sufficient for the ffi library to handle all conversions of variables to and from the lua.

This decision opens up all sorts of possibilities for extensions through. Browse other questions tagged c, ffi, lua, luajit you may be interested in these books. Tonight i did some more modeling and discovered that sandbags and sandbag walls and bunkers are hella hard. Its easy to use for users, cause the header file is very easy to find from library source code. Extending lua to c using the luajit ffi library the runtime lua environment hosted by the stingray engine is powered by the luajit library. The ffi library is tightly integrated into luajit its not available as a separate module.

Extending lua to c using the luajit ffi library autodesk. The ffi is disabled, too, since its not very useful in such an environment. Luajits bit, ffi and jit modules luajits extensions from lua 5. Lua is a powerful, dynamic and lightweight programming language. The relative bug counts reinforce the fact that in the details, the two implementations are very different for example, luajit uses a lot of assembly language while puc lua is pure c89. Luajits builtin ffi provides a very fast way for lua programs to access c functions and structures.

See the luaradio mailing list for general discussion. Its considerably faster than plain lua up to a hundred times faster and it comes with a really nice way of loading shared libraries through its ffi library. This would allow direct lowlevel access to numpy matrices and the like, thus providing an efficient lua companion for the huge set of scientific computation libraries in scipy, sage and the like. Here we have a ffibinding which means that only the header of the c functions are sufficient for the ffi library to handle all conversions of variables to and from the lua. Some minor concessions are needed for smoother interoperation with lua. Rewrite printc in lua using the ffi, or write lua c api bindings to the library youre using p with. On windows systems, this binds to symbols exported from the. Here were wrapping the call to the c function in a lua. As there seem little to no luajit binaries anywhere on the web, i decided to put some up myself. You would need to add the definition of those data types as well. Lua luajit more than 3 years have passed since last update. On the other hand, the call to those functions should be made through a library that actually implement.

Mar 07, 2014 tonight i did some more modeling and discovered that sandbags and sandbag walls and bunkers are hella hard. At runtime you pass it some c function definitions, and then everything youve defined becomes callable, and these calls are subsequently jit compiled in the most efficient way possible. Its strongly suggested to build luajit separately using the supplied build system. Extending lua to c using the luajit ffi library i did a. But with the jit compiler comes along a nice ffi c interface. Add lua and lua\jit directories below it and copy all lua files from the src\jit directory. Net command prompt, change to the directory where msvcbuild. The build went through with no errors and the jit seems to just work just fine. An existing finalizer can be removed by setting a nil finalizer, e.

Feedback appreciated to email protected, or the luajit mailing list. Luaradio blocks are written in pure lua, but can use luajits ffi to wrap external libraries, like volk, liquiddsp, and others, for computational acceleration, sophisticated processing, and interfacing with sdr hardware. The only annoying thing is its lack of standard libraries. Speed easier bindings done from the lua side, given a simple c abi of whatever needs binding. Extending lua to c using the luajit ffi library hi, my guess is that youve compiled your dll for a windows 32 target. The code generated by the jitcompiler for accesses to c data structures from lua code is on par with the code a c compiler would generate. These are supported by luajits ffi and will not be supported by this. The bindings will still work with lua vms that dont have the ffi extension by falling back to using the standard lua c api. The example in luajit ffi shows luajit ffi call is 110x faster than in pure lua interpreter. Until recently it did not dawn on me what a brilliant decision the stingray team made by using luajit for their lua implementation.

Luajit has an ffi which allows code to be jit compiled, whereas regular c api calls arent 1. The problem is, ffi only searches for symbols in the. The luajit wiki has been created to gather community resources about developing programs using luajit. Many of the simpler c functions can probably be used directly from your lua code, without any wrappers. Luajit and python support copynpasting c header file when defining function signatures. I recently looked into lua and it seems really nice. Ive searched around and found that therere really little document on the ffi module. Luajit is meant to be a dropin replacement for stock lua, so it should work just by replacing it. Lua is implemented in pure ansi c and compiles unmodified in all platforms that have an ansi c compiler. The advantages of luajit over puc lua seem to be performance and its ffi. So heres something to pop up a message box on windows. Rewrite printc in lua using the ffi, or write lua c api bindings to the library youre using p. It is designed to be interface compatible with the ffi library in luajit see.

Depending on your distribution, you may need to install a package for gcc, the. If you didnt install in luajit directory, set basedir variable in imgui. Calls to c functions can be inlined in jitcompiled code, unlike calls to functions bound via the classic luac api. Simple c function and structure declarations are directly understood. The foreign function interface ffi present in the latest beta releases of luajit is really nice for when you need to do things outside the lua world. Hi all, just thought i would share how i have made luasocket work with stingray in windows. On the other hand, the call to those functions should be made through a library that actually implement those functions, such as openssl, not ffi.

The lua users wiki lists many usercontributed addons for lua. Please note that most developers prefer to only bind to the few library calls they actually need. Luajit and puc lua appear to be very similar superficially luajit is lua, but fast. Luajit ffi bindings for libiconv character encoding conversion in openresty xiaooloong lua restyiconv. Extending lua to c using the luajit ffi library search. Now, these buffers are basically represented as a struct containing a void. Luajit ffi binding to libuv with coroutines hacker. Heres a simple example for embedding lua or luajit into your application. Ffi native libraries pure lua libraries leveraging ffi.

Also, lua os with one or two tweaks now works with luajit. Whats happening is that the application is giving a bad callback error shortly after the application starts, especially when moving the. I always liked how the luajit ffi worked, so i decided to roughly recreate it, but in a portable way, using libffi, so that it works on anything as. Tags c, ffi, lua, luajit not what youre looking for. This is a library for calling c function and manipulating c types from lua.

Stingrays a win64 application so your dll needs to be compiled for win 64. Luajit is a justintime compiler jit for the lua programming language. One major advantage of the luajit ffi is that you are now able to write those wrappers in lua. The finalizer can be a lua function or a cdata function or cdata function pointer. Provided luajit supports your platform, it will be as fast if not faster than writing c extensions. Given that the ffi library is designed to interface with c code and that declarations. Luajit s builtin ffi provides a very fast way for lua programs to access c functions and structures. Precompiled lua libraries and executables are available at luabinaries. Everyone is welcome to contribute relevant material please refer to the wiki faq for details. And the endless loop protection is, by definition, incomplete, as luajit cannot protect against that. Ive worked out the module loading system and have luajit linked in to my game moduledll, and can all and run lua code. The lua c api and the luajit ffi are deliberately separated and cannot interact. All discussions only photos only videos only links only polls only events only. The luausers wiki lists many usercontributed addons for lua.