Module finalization (along the lines of calling a function on exit)
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- Subject: Module finalization (along the lines of calling a function on exit)
- From: "Vijay Aswadhati" <wyseman@...>
- Date: 2005年8月16日 15:52:52 -0700
Searching through the archives I found this post[1] that suggests a way to call
function on exit. How does it work in practice for a module. In other words if
I have code like this:
<C code>
static int z_foo(lua_State *L);
static int z_bar(lua_State *L);
static int z_initialize();
static int z_finalize();
static const struct luaL_reg functions[] = {
{"foo", z_foo},
{"bar", z_bar},
{"__gc", z_finalize}, /* <-- does not work */
{NULL, NULL}
};
Z_API int luaopen_z (lua_State *L)
{
int rac = 0, cc = z_initialize();
if ( cc != Z_OK ) {
z_decode_and_raise_error(L, cc, "luaopen_z");
}
else {
luaL_module(L, "z", functions, 0);
rac = 1;
}
return rac;
}
</C code>
Where exactly would I set the __gc hook to invoke z_finalize() function call
when the module 'z' gets unloaded. In LuaSocket and as per Diego's post there
is an "__unload" method registered as part of the base libraries, which seems
to be nothing at run time; i.e it never gets called automatically.
Help!
-- v.a
[1] http://lua-users.org/lists/lua-l/2004-06/msg00195.html