include/tools/link.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
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   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #ifndef INCLUDED_TOOLS_LINK_HXX
  21 #define INCLUDED_TOOLS_LINK_HXX
  22
  23 #include <sal/config.h>
  24
  25 #include <sal/types.h>
  26
  27 #define DECL_LINK(Member, ArgType) \
  28     static sal_IntPtr LinkStub##Member(void *, void *); \
  29     sal_IntPtr Member(ArgType)
  30
  31 #define DECL_STATIC_LINK(Class, Member, ArgType) \
  32     static sal_IntPtr LinkStub##Member(void *, void *); \
  33     static sal_IntPtr Member(Class *, ArgType)
  34
  35 #define DECL_DLLPRIVATE_LINK(Member, ArgType) \
  36     SAL_DLLPRIVATE static sal_IntPtr LinkStub##Member(void *, void *); \
  37     SAL_DLLPRIVATE sal_IntPtr Member(ArgType)
  38
  39 #define DECL_DLLPRIVATE_STATIC_LINK(Class, Member, ArgType) \
  40     SAL_DLLPRIVATE static sal_IntPtr LinkStub##Member(void *, void *); \
  41     SAL_DLLPRIVATE static sal_IntPtr Member(Class *, ArgType)
  42
  43 #define IMPL_LINK(Class, Member, ArgType, ArgName) \
  44     sal_IntPtr Class::LinkStub##Member(void * instance, void * data) { \
  45         return static_cast<Class *>(instance)->Member( \
  46             static_cast<ArgType>(data)); \
  47     } \
  48     sal_IntPtr Class::Member(ArgType ArgName)
  49
  50 #define IMPL_LINK_NOARG(Class, Member) \
  51     sal_IntPtr Class::LinkStub##Member(void * instance, void * data) { \
  52         return static_cast<Class *>(instance)->Member(data); \
  53     } \
  54     sal_IntPtr Class::Member(SAL_UNUSED_PARAMETER void *)
  55
  56 #define IMPL_STATIC_LINK(Class, Member, ArgType, ArgName) \
  57     sal_IntPtr Class::LinkStub##Member(void * instance, void * data) { \
  58         return Member( \
  59             static_cast<Class *>(instance), static_cast<ArgType>(data)); \
  60     } \
  61     sal_IntPtr Class::Member(SAL_UNUSED_PARAMETER Class *, ArgType ArgName)
  62
  63 #define IMPL_STATIC_LINK_NOARG(Class, Member) \
  64     sal_IntPtr Class::LinkStub##Member(void * instance, void * data) { \
  65         return Member(static_cast<Class *>(instance), data); \
  66     } \
  67     sal_IntPtr Class::Member( \
  68         SAL_UNUSED_PARAMETER Class *, SAL_UNUSED_PARAMETER void *)
  69
  70 #define DECL_LINK_TYPED(Member, ArgType, RetType) \
  71     static RetType LinkStub##Member(void *, ArgType); \
  72     RetType Member(ArgType)
  73
  74 #define DECL_STATIC_LINK_TYPED(Class, Member, ArgType, RetType) \
  75     static RetType LinkStub##Member(void *, ArgType); \
  76     static RetType Member(Class *, ArgType)
  77
  78 #define DECL_DLLPRIVATE_LINK_TYPED(Member, ArgType, RetType) \
  79     SAL_DLLPRIVATE static RetType LinkStub##Member(void *, ArgType); \
  80     SAL_DLLPRIVATE RetType Member(ArgType)
  81
  82 #define DECL_DLLPRIVATE_STATIC_LINK_TYPED(Class, Member, ArgType, RetType) \
  83     SAL_DLLPRIVATE static RetType LinkStub##Member(void *, ArgType); \
  84     SAL_DLLPRIVATE static RetType Member(Class *, ArgType)
  85
  86 #define IMPL_LINK_TYPED(Class, Member, ArgType, ArgName, RetType) \
  87     RetType Class::LinkStub##Member(void * instance, ArgType data) { \
  88         return static_cast<Class *>(instance)->Member(data); \
  89     } \
  90     RetType Class::Member(ArgType ArgName)
  91
  92 #define IMPL_LINK_NOARG_TYPED(Class, Member, ArgType, RetType) \
  93     RetType Class::LinkStub##Member(void * instance, ArgType data) { \
  94         return static_cast<Class *>(instance)->Member(data); \
  95     } \
  96     RetType Class::Member(SAL_UNUSED_PARAMETER ArgType)
  97
  98 #define IMPL_STATIC_LINK_TYPED( \
  99         Class, Member, ArgType, ArgName, RetType) \
 100     RetType Class::LinkStub##Member(void * instance, ArgType data) { \
 101         return Member(static_cast<Class *>(instance), data); \
 102     } \
 103     RetType Class::Member(SAL_UNUSED_PARAMETER Class *, ArgType ArgName)
 104
 105 #define IMPL_STATIC_LINK_NOARG_TYPED( \
 106         Class, Member, ArgType, RetType) \
 107     RetType Class::LinkStub##Member(void * instance, ArgType data) { \
 108         return Member(static_cast<Class *>(instance), data); \
 109     } \
 110     RetType Class::Member( \
 111         SAL_UNUSED_PARAMETER Class *, SAL_UNUSED_PARAMETER ArgType)
 112
 113 #define LINK(Instance, Class, Member) ::tools::detail::makeLink( \
 114     static_cast<Class *>(Instance), &Class::LinkStub##Member)
 115
 116 template<typename Arg = void *, typename Ret = sal_IntPtr>
 117 class SAL_WARN_UNUSED Link {
 118 public:
 119     typedef Ret Stub(void *, Arg);
 120
 121     Link(): function_(nullptr), instance_(nullptr) {}
 122
 123     Link(void * instance, Stub * function):
 124         function_(function), instance_(instance) {}
 125
 126     Ret Call(Arg data) const
 127     { return function_ == nullptr ? Ret() : (*function_)(instance_, data); }
 128
 129     bool IsSet() const { return function_ != nullptr; }
 130
 131     bool operator !() const { return !IsSet(); }
 132
 133     bool operator <(Link const & other) const {
 134         return reinterpret_cast<sal_uIntPtr>(function_)
 135             < reinterpret_cast<sal_uIntPtr>(other.function_);
 136     };
 137
 138     bool operator ==(Link const & other) const
 139     { return function_ == other.function_ && instance_ == other.instance_; };
 140
 141     bool operator !=(Link const & other) const { return !operator ==(other); };
 142     void *GetInstance() const { return instance_; }
 143
 144 private:
 145     Stub * function_;
 146     void * instance_;
 147 };
 148
 149 namespace tools { namespace detail {
 150
 151 template<typename Arg, typename Ret>
 152 Link<Arg, Ret> makeLink(void * instance, Ret (* function)(void *, Arg)) {
 153     return Link<Arg, Ret>(instance, function);
 154 }
 155
 156 } }
 157
 158 #endif
 159
 160 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */