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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef LUA_DEFS_H
#define LUA_DEFS_H
#include <cassert>
#include <string>
#include "System/UnorderedMap.hpp"
enum DataType {
INT_TYPE,
BOOL_TYPE,
FLOAT_TYPE,
STRING_TYPE,
FUNCTION_TYPE,
READONLY_TYPE,
ERROR_TYPE
};
struct lua_State;
typedef int (*AccessFunc)(lua_State* L, const void* data);
struct DataElement {
public:
DataElement()
: type(ERROR_TYPE), offset(0), func(NULL), deprecated(true) {}
DataElement(DataType t)
: type(t), offset(0), func(NULL), deprecated(false) {}
DataElement(DataType t, int o)
: type(t), offset(o), func(NULL), deprecated(false) {}
DataElement(DataType t, int o, AccessFunc f, bool d=false)
: type(t), offset(o), func(f), deprecated(d) {}
public:
DataType type;
int offset;
AccessFunc func;
bool deprecated;
};
typedef spring::unordered_map<std::string, DataElement> ParamMap;
namespace {
template<typename T> DataType GetDataType(T) {
const bool valid_type = false;
assert(valid_type);
return ERROR_TYPE;
}
template<> inline DataType GetDataType(unsigned) { return INT_TYPE; }
template<> inline DataType GetDataType(int) { return INT_TYPE; }
template<> inline DataType GetDataType(bool) { return BOOL_TYPE; }
template<> inline DataType GetDataType(float) { return FLOAT_TYPE; }
template<> inline DataType GetDataType(std::string) { return STRING_TYPE; }
}
#define ADDRESS(name) ((const char *)&name)
// Requires a "start" address, use ADDRESS()
#define ADD_INT(lua, cpp) \
paramMap[lua] = DataElement(GetDataType(cpp), ADDRESS(cpp) - start)
#define ADD_BOOL(lua, cpp) \
paramMap[lua] = DataElement(GetDataType(cpp), ADDRESS(cpp) - start)
#define ADD_FLOAT(lua, cpp) \
paramMap[lua] = DataElement(GetDataType(cpp), ADDRESS(cpp) - start)
#define ADD_STRING(lua, cpp) \
paramMap[lua] = DataElement(GetDataType(cpp), ADDRESS(cpp) - start)
#define ADD_FUNCTION(lua, cpp, func) \
paramMap[lua] = DataElement(FUNCTION_TYPE, ADDRESS(cpp) - start, func)
#define ADD_DEPRECATED_FUNCTION(lua, cpp, func) \
paramMap[lua] = DataElement(FUNCTION_TYPE, ADDRESS(cpp) - start, func, true)
// keys added through this macro will generate
// (non-fatal) ERROR_TYPE warnings if indexed
#define ADD_DEPRECATED_LUADEF_KEY(lua) \
paramMap[lua] = DataElement();
#define DECL_LOAD_HANDLER(HandlerType, HandlerInstance) \
bool HandlerType::LoadHandler() { \
{ \
std::lock_guard<spring::mutex> lk(m_singleton); \
\
if (HandlerInstance != nullptr) \
return (HandlerInstance->IsValid()); \
if (!HandlerType::CanLoadHandler()) \
return false; \
\
HandlerInstance = new HandlerType(); \
return (HandlerInstance->IsValid()); \
} \
}
#define DECL_FREE_HANDLER(HandlerType, HandlerInstance) \
bool HandlerType::FreeHandler() { \
std::lock_guard<spring::mutex> lk(m_singleton); \
\
if (HandlerInstance == nullptr) \
return false; \
\
auto* inst = HandlerInstance; \
HandlerInstance = NULL; \
inst->KillLua(true); \
delete inst; \
return true; \
}
#endif // LUA_DEFS_H
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