Am 04.09.2012 um 14:35 schrieb David Seikel <onef...@gmail.com>: > On Tue, 4 Sep 2012 13:24:27 +0200 Leif Middelschulte > <leif.middelschu...@gmail.com> wrote: > >> as some distributions and Mac OS' (home)brew package manager already >> ship lua >=5.2, it might be time to make the code compatible. >> >> The functions which aren't available anymore: >> >> _luaL_register >> Module and luaL_register deprecated, replaced by luaL_newlib and >> luaL_setfuncs. >> >> _lua_objlen >> lua_objlen has become lua_rawlen with a very slight change in >> behaviour, lua_len and luaL_len have been addded. The length >> function(s) changed between Lua 5.0 and 5.1, and they've changed >> again between 5.1 and 5.2-work3. What used to be calledlua_objlen in >> 5.1 was been renamed to lua_rawlen, with the only difference in >> behaviour being that lua_rawlen no longer calculates the length of a >> number by taking the string representation of it; it just returns >> zero. The new lua_len function behaves exactly like the length >> operator in Lua code, and the new luaL_len function behaves in a >> similar way but returns the result as an integer rather than on the >> stack (and throws an error if the length is not a number). >> >> I'm not familiar with the behavior edje expects, so I'm asking for >> anybody who's familiar with it to add a conditional define to edje's >> configure.ac, corresponding code to edje's code and changelog+NEWS(?) >> to maintain vtorri's sanity :) > > We discussed this last year and came to the conclusion that moving to > 5.2 was not a good idea at the time. It might be time to look at that > again, things progress. > > Since then I have spent some time experimenting with LuaJIT 2, which is > Lua 5.1 with some 5.2 features, plus lots and lots of JIT speed, and > some speed, as well as red speed stripes for that extra bit of raw > speed. Did I mention it's fast? I also added luaproc into the mix, but > ended up rewriting most of luaproc. By "rewriting" I mean "throwing > out most of it, replacing a few of the removed bits with EFL, and > massaging the rest to suit my purposes". Well, half of luaproc just > implemented stuff we already had in EFL. > > My experiments with LuaJIT 2 + what's left of luaproc are not finished > yet, but so far I like what I have. Only one part of LuaJIT 2 I want to > replace, and that's the memory allocator. Simply coz it does not > handle setting memory size limits per script like we do in Edje Lua. > Which is also important for the non Edje project I have been using as a > test bed. > > Apart from being generally regarded as the worlds fastest script > language interpreter, LuaJIT 2 offers one important thing that I think > might be great for EFL - it very easily wraps existing C libraries, > turning them into Lua API. This part I've not experimented with > yet, but I have high hopes. > > Now while I have no problem with detecting an OS installed Lua 5.1/5.2 > and adjusting the compile to suit, I'd like to suggest a different > approach. Basically do something similar to what we did with Small/Pawn > -> Embryo. Not such a drastic fork though, but keeping more or less in > sync with upstream of LuaJIT 2, and having our own copy in SVN. Replace > the LuaJIT 2 memory allocator with an Eina one, and implement our memory > size per script limit. Lua, like Small/Pawn and Embryo, is tiny. > That's one of the reasons we picked it for EFL. Lua is designed to be > embedded, so it's quite happy not being a system library. > > The reason none of this Lua experimentation has been seen here in EFL > land is that my experiments where on another project. Using EFL, with > an eye to using my experience with EFL's Lua code, but not actually > related to EFL. https://github.com/onefang/SledjHamr look at the > experimental branch, and then the LuaSL directory. Or look at > https://github.com/onefang/SledjHamr/tree/experimental/LuaSL for the > lazy. It's an implementation of the Second Life LSL scripting language > made for OpenSim, but using Lua and C (instead of C#), with EFL as the > major support libraries. Basically it converts LSL into Lua, with the > option of using pure Lua, then passes the result to LuaJIT 2. Luaproc > (or what's left of it) is used to scale the result up to the thousands > of event driven scripts running at once that virtual worlds with user > written scripts requires. > > Since I did that with an eye to using my experience in EFL's Lua code, > there's some similarities with the EFL Lua bindings Raster and I > wrote. It's not a drop in replacement, but I think I can make the > switch. > > I wanted to finish my experiments and have it working nicely, with some > benchmarks and useful figures, before I hit EFL coders with the idea of > using LuaJIT 2. Wanted to get a good handle on what I'm talking about > before putting it through the grill of trying to get it into EFL. Right > now, I still want to experiment with the LuaJIT C library binding > mechanism before even deciding if it's good enough for EFL. > > That was six months ago. I've been too busy with other things since, > and the coder I was relying on to get the next step done vanished. > Guess I'll have to learn C# and interface with the OpenSim code > myself. B-( Sounds like a nice thing for the future. Question remains though: Would you be willing to make those (minor?) adjustments, so it'll work with mac os mountain lion + brew ootb? Just until the lua jit stuff you're hacking on hits svn? > > -- > A big old stinking pile of genius that no one wants > coz there are too many silver coated monkeys in the world. -- Leif
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