instance_specific_extensions_int.h revision 13511:dc5864c73df3 
1/*****************************************************************************
2
3  Licensed to Accellera Systems Initiative Inc. (Accellera) under one or
4  more contributor license agreements.  See the NOTICE file distributed
5  with this work for additional information regarding copyright ownership.
6  Accellera licenses this file to you under the Apache License, Version 2.0
7  (the "License"); you may not use this file except in compliance with the
8  License.  You may obtain a copy of the License at
9
10    http://www.apache.org/licenses/LICENSE-2.0
11
12  Unless required by applicable law or agreed to in writing, software
13  distributed under the License is distributed on an "AS IS" BASIS,
14  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
15  implied.  See the License for the specific language governing
16  permissions and limitations under the License.
17
18 *****************************************************************************/
19#ifndef TLM_UTILS_INSTANCE_SPECIFIC_EXTENSIONS_INT_H_INCLUDED_
20#define TLM_UTILS_INSTANCE_SPECIFIC_EXTENSIONS_INT_H_INCLUDED_
21
22#ifndef SC_BUILD // incluce full TLM, when not building the library
23#include <tlm>
24#else
25#include "tlm_core/tlm_2/tlm_generic_payload/tlm_gp.h"
26#endif // SC_BUILD
27
28namespace tlm_utils {
29class SC_API ispex_base;
30class SC_API instance_specific_extension_accessor;
31class SC_API instance_specific_extension_container;
32class instance_specific_extension_carrier;
33class instance_specific_extension_container_pool;
34}
35
36namespace tlm {
37SC_API_TEMPLATE_DECL_ tlm_array<tlm_utils::ispex_base*>;
38} // namespace tlm
39
40namespace tlm_utils {
41
42//The private extension base. Similar to normal extension base, but without clone and free
43class SC_API ispex_base
44{
45    friend class tlm::tlm_array<ispex_base*>;
46    void free() {} // needed for explicit tlm_array instantiation
47public:
48    virtual ~ispex_base() {}
49protected:
50    static unsigned int register_private_extension(const std::type_info&);
51};
52
53//this thing is basically a snippet of the generic_payload
54// it contains all the extension specific code (the extension API so to speak)
55// the differences are:
56// - it calls back to its owner whenever a real (==non-NULL) extension gets set for the first time
57// - it calls back to its owner whenever a living (==non-NULL) extension gets cleared
58class SC_API instance_specific_extensions_per_accessor
59{
60public:
61  typedef instance_specific_extension_container container_type;
62
63  explicit
64  instance_specific_extensions_per_accessor(container_type* container)
65    : m_container(container)
66  {}
67
68  template <typename T> T* set_extension(T* ext)
69  {
70      return static_cast<T*>( set_extension(T::priv_id, ext) );
71  }
72
73  // non-templatized version with manual index:
74  ispex_base* set_extension(unsigned int index, ispex_base* ext);
75
76  // Check for an extension, ext will point to 0 if not present
77  template <typename T> void get_extension(T*& ext) const
78  {
79      ext = static_cast<T*>(get_extension(T::priv_id));
80  }
81  // Non-templatized version:
82   ispex_base* get_extension(unsigned int index) const;
83
84  // Clear extension, the argument is needed to find the right index:
85  template <typename T> void clear_extension(const T*)
86  {
87      clear_extension(T::priv_id);
88  }
89
90  // Non-templatized version with manual index
91  void clear_extension(unsigned int index);
92
93  // Make sure the extension array is large enough. Can be called once by
94  // an initiator module (before issuing the first transaction) to make
95  // sure that the extension array is of correct size. This is only needed
96  // if the initiator cannot guarantee that the generic payload object is
97  // allocated after C++ static construction time.
98  void resize_extensions();
99
100private:
101  tlm::tlm_array<ispex_base*> m_extensions;
102  container_type* m_container;
103
104}; // class instance_specific_extensions_per_accessor
105
106#if defined(_MSC_VER) && !defined(SC_WIN_DLL_WARN)
107#pragma warning(push)
108#pragma warning(disable: 4251) // DLL import for vector
109#endif
110
111//this thing contains the vector of extensions per accessor
112//which can be really large so this one should be pool allocated
113// therefore it keeps a use_count of itself to automatically free itself
114// - to this end it provides callbacks to the extensions per accessor
115//   to increment and decrement the use_count
116class SC_API instance_specific_extension_container
117{
118  friend class instance_specific_extension_accessor;
119  friend class instance_specific_extension_carrier;
120  friend class instance_specific_extension_container_pool;
121  friend class instance_specific_extensions_per_accessor;
122
123  typedef void release_fn(instance_specific_extension_carrier*,void*);
124
125  instance_specific_extension_container();
126  ~instance_specific_extension_container();
127
128  void resize();
129
130  void inc_use_count();
131  void dec_use_count();
132
133  static instance_specific_extension_container* create();
134  void attach_carrier(instance_specific_extension_carrier*, void* txn, release_fn*);
135
136  instance_specific_extensions_per_accessor* get_accessor(unsigned int index);
137
138  std::vector<instance_specific_extensions_per_accessor*> m_ispex_per_accessor;
139  unsigned int use_count;
140  void* m_txn;
141  release_fn* m_release_fn;
142  instance_specific_extension_carrier* m_carrier;
143  instance_specific_extension_container* next; //for pooling
144
145}; // class instance_specific_extension_container
146
147#if defined(_MSC_VER) && !defined(SC_WIN_DLL_WARN)
148#pragma warning(pop)
149#endif
150
151// ----------------------------------------------------------------------------
152
153//This class 'hides' all the instance specific extension stuff from the user
154// he instantiates one of those (e.g. instance_specific_extension_accessor extAcc;) and can then access
155// the private extensions
156//    extAcc(txn).extensionAPIFnCall()
157//  where extensionAPIFnCall is set_extension, get_extension, clear_extension,...
158class SC_API instance_specific_extension_accessor
159{
160public:
161  instance_specific_extension_accessor();
162
163  template<typename T> // implementation in instance_specific_extensions.h
164  inline instance_specific_extensions_per_accessor& operator()(T& txn);
165
166protected:
167  template<typename T>
168  static void release_carrier(instance_specific_extension_carrier*, void* txn);
169
170  unsigned int m_index;
171}; // class instance_specific_extension_accessor
172
173} // namespace tlm_utils
174#endif // TLM_UTILS_INSTANCE_SPECIFIC_EXTENSIONS_INT_H_INCLUDED_
175