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/*******************************************************************************
* libmodman - A library for extending applications
* Copyright (C) 2009 Nathaniel McCallum <nathaniel@natemccallum.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
******************************************************************************/
#ifndef MODULE_HPP_
#define MODULE_HPP_
#include <cstdlib> // For NULL
#ifndef MM_MODULE_BUILTIN
#define MM_MODULE_BUILTIN
#endif
#ifdef _MSC_VER
#define __MM_DLL_EXPORT __declspec(dllexport)
#else
#define __MM_DLL_EXPORT __attribute__ ((visibility("default")))
#endif
#define __MM_MODULE_VERSION 2
#define __MM_MODULE_VARNAME__(suffix, name) mm_ ## name ## _ ## suffix
#define __MM_MODULE_VARNAME_(suffix, name) __MM_MODULE_VARNAME__(suffix, name)
#define __MM_MODULE_VARNAME(name) __MM_MODULE_VARNAME_(MM_MODULE_BUILTIN, name)
#define MM_MODULE_INIT(mtype, minit, mtest, msymb, msmod) \
extern "C" __MM_DLL_EXPORT struct mm_module __MM_MODULE_VARNAME(info); \
struct mm_module __MM_MODULE_VARNAME(info) = { \
__MM_MODULE_VERSION, \
# mtype, \
mtype::base_type, \
minit, mtest, msymb, msmod \
}
#define MM_MODULE_INIT_EZ(clsname, mtest, msymb, msmod) \
static libmodman::base_extension** clsname ## _init() { \
libmodman::base_extension** retval = new libmodman::base_extension*[2]; \
retval[0] = new clsname(); \
retval[1] = NULL; \
return retval; \
} \
static bool clsname ## _test() { return mtest; } \
MM_MODULE_INIT(clsname, clsname ## _init, clsname ## _test, msymb, msmod)
/* Helper macro for loading builtins */
#define MM_DEF_BUILTIN(modname) \
extern "C" struct mm_module __MM_MODULE_VARNAME_(modname,info)
#define MM_BUILTIN(modname) __MM_MODULE_VARNAME_(modname,info)
namespace libmodman {
class __MM_DLL_EXPORT base_extension {
public:
static const char* base_type() { return NULL; }
static bool singleton() { return false; }
virtual ~base_extension() {}
virtual const char* get_base_type() const =0;
virtual bool operator<(const base_extension&) const =0;
};
template <class basetype, bool sngl=false>
class __MM_DLL_EXPORT extension : public base_extension {
public:
#ifdef _MSC_VER
static const char* base_type() { return __FUNCSIG__; }
#else
static const char* base_type() { return __PRETTY_FUNCTION__; }
#endif
static bool singleton() { return sngl; }
virtual const char* get_base_type() const { return basetype::base_type(); }
virtual bool operator<(const base_extension&) const { return false; };
};
}
extern "C" {
struct __MM_DLL_EXPORT mm_module
{
/* For some unknown reason, when vers is const VC++ (win32) NULLs out the whole struct.
* This obviously breaks module loading. I'd love to know the reason for this, so if
* anyone knows, please tell me. In the meantime, vers not being const is by design,
* so don't change it. */
unsigned int vers;
const char* name;
const char* (*type)();
libmodman::base_extension** (*init)();
bool (*test)();
const char* symb;
const char* smod;
};
}
#endif /* MODULE_HPP_ */
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