Re: How should I set up C + Lua modules
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- Subject: Re: How should I set up C + Lua modules
- From: Peter Odding <peter@...>
- Date: 2011年2月10日 22:55:04 +0100
Hi Michael,
My Lua/APR binding [1] includes lots of C source code plus a few 'sugar'
functions as you describe them. The easiest way I've found to combine
them is more or less as you envision it:
There's a Lua script which is loaded on require 'apr', this file is
named "apr.lua" [2] and is placed in one of the top level directories in
Lua's module search path. The first line of this script contains:
local apr = require 'apr.core'
-- .. and the script ends with ..
return apr
The binary module is called "core.so" ("core.dll" on Windows) and is
located in a subdirectory "apr" in one of the directories in Lua's
binary module search path. The loader function in the binary module [3]
is called "luaopen_apr_core".
The nice thing about this scheme is that your Lua script can remove some
functions from the module table created in C and save those functions in
local variables. Now your Lua functions can call the C functions to
perform low level tasks and the C functions don't have to be foolproof
because you'll be writing the code that calls them.
- Peter Odding
[1] http://peterodding.com/code/lua/apr/
[2] http://github.com/xolox/lua-apr/blob/master/src/apr.lua
[3] http://github.com/xolox/lua-apr/blob/master/src/lua_apr.c