Problem with table created from C

[Steve Heller <steve@...>]

Hi all,

I'm having a problem when creating a Lua table from
C++, then asking for its value later. For some reason,
the table doesn't seem to exist.

Code that shows what I'm doing is at the bottom of
this message. The
"GetThreadLuaPointer"/"SetThreadLuaPointer" functions
use thread local storage to save the Lua environment
pointer. There are two phases of this program.

1. Store the rules into the RuleManager table, via
code like this:

LuaRuleManager RulesObject;
LuaRuleManager.AddRule(ruleNumber,ruleString);

2. Retrieve the rules from the RuleManager table, via
code like this:

LuaRuleManager RulesObject;
string result = LuaRuleManager.GetRule(ruleNumber);

The storage part works fine; I've confirmed that the
rules are actually being saved in the RuleManager
table. Unfortunately, when I try to retrieve the
rules, the RuleManager object comes up as nil.

Any suggestions as to what the problem may be, or how
to fix it?

Thanks.

--------------------------------
LuaRuleManager::LuaRuleManager()
{
    m_L = GetThreadLuaPointer();
    
    if (m_L == 0)
        {
        m_L = lua_open();              /* opens Lua */
        SetThreadLuaPointer(m_L);
        luaL_openlibs(m_L);            /* open
standard libraries */
        
        lua_newtable(m_L);             // create new
table
        lua_setglobal(m_L,"RuleManager");    // assign
it to global variable named RuleManager
        }
}

LuaRuleManager::~LuaRuleManager()
{
}

void LuaRuleManager::AddRule(int id, const string&
RuleString)
{
    lua_getglobal(m_L,"RuleManager");
    if (!lua_istable(m_L,-1))
        __asm int 3; //RuleManager table not found
    
    lua_pushnumber(m_L,id);
    lua_pushstring(m_L,RuleString.c_str());
    lua_settable(m_L,-3);
    lua_settop (m_L, 0);
}

string LuaRuleManager::GetRule(int id)
{
    lua_getglobal(m_L,"RuleManager");
    if (!lua_istable(m_L,-1))
        {
        PassThrough::DumpStack(m_L);
        __asm int 3; //RuleManager table not found
        }
        
    lua_pushnumber(m_L,id);
    lua_gettable(m_L,-2);
    size_t size;
    const char* rule = lua_tolstring(m_L,-1,&size);
    lua_settop (m_L, 0);
    
    return string(rule,size);
}