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[22_1] improve code of resources to use them inside namespace #321

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Apr 15, 2024
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[22_1] improve code of resources to use them inside namespace #321

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52 changes: 21 additions & 31 deletions Kernel/Abstractions/resource.hpp
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Original file line number Diff line number Diff line change
@@ -1,19 +1,25 @@

/******************************************************************************
* MODULE : resource.hpp
* COPYRIGHT : (C) 1999 Joris van der Hoeven
*******************************************************************************
* This software falls under the GNU general public license version 3 or later.
* It comes WITHOUT ANY WARRANTY WHATSOEVER. For details, see the file LICENSE
* in the root directory or <http://www.gnu.org/licenses/gpl-3.0.html>.
******************************************************************************/
/** \file resource.hpp
* \copyright GPLv3
* \details Utils to define a class that holding its instances globally.
* Instances is called "Resources", and can be looked up by a string.
* Weak referrence is provided to access member of resources.
* \author Joris van der Hoeven
* \date 1999
* \author jingkaimori
* \date 2024
*/

#ifndef RESOURCE_H
#define RESOURCE_H

#include "hashmap.hpp"
#include "string.hpp"

/**
* \brief base class of resources
* \note no referrence counting is applied on this structure
*/
template <class T> struct rep {
string res_name;
inline rep<T> (string res_name2) : res_name (res_name2) {
Expand All @@ -27,38 +33,22 @@ template <class R> class resource_ptr {
~resource_ptr (){};

public:
R* rep;
static hashmap<string, pointer> instances;
inline R* operator->() { return rep; }
R* rep;
inline static hashmap<string, pointer> instances=
hashmap<string, pointer> (NULL);
/* C++17 feature, use inline keyword here to pack definition along with
declaration, instead of defining static member inside expansion
of RESOURCE macro.*/
inline R* operator->() { return rep; }
};

#if (defined(_WIN32) || defined(_WIN64))
#define RESOURCE(PTR) \
struct PTR##_rep; \
struct PTR : public resource_ptr<PTR##_rep> { \
inline PTR (PTR##_rep* rep2= NULL) { rep= rep2; } \
inline PTR (string s) { rep= (PTR##_rep*) instances[s]; } \
inline ~PTR () {} \
}
#else
#define RESOURCE(PTR) \
struct PTR##_rep; \
template <> hashmap<string, pointer> resource_ptr<PTR##_rep>::instances; \
struct PTR : public resource_ptr<PTR##_rep> { \
inline PTR (PTR##_rep* rep2= NULL) { rep= rep2; } \
inline PTR (string s) { rep= (PTR##_rep*) instances[s]; } \
inline ~PTR () {} \
}
#endif

#if (defined(_WIN32) || defined(_WIN64))
#define RESOURCE_CODE(PTR) \
hashmap<string, pointer> resource_ptr<PTR##_rep>::instances (NULL);
#else
#define RESOURCE_CODE(PTR) \
template <> \
hashmap<string, pointer> resource_ptr<PTR##_rep>::instances (NULL);
#endif

template <class R>
inline bool
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