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Diffstat (limited to 'include/tools/link.hxx')
| -rw-r--r-- | include/tools/link.hxx | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/include/tools/link.hxx b/include/tools/link.hxx new file mode 100644 index 000000000..ec88bf953 --- /dev/null +++ b/include/tools/link.hxx @@ -0,0 +1,180 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#ifndef INCLUDED_TOOLS_LINK_HXX +#define INCLUDED_TOOLS_LINK_HXX + +#include <sal/config.h> + +#include <sal/macros.h> +#include <sal/types.h> + +#define DECL_LINK(Member, ArgType, RetType) \ + static RetType LinkStub##Member(void *, ArgType); \ + RetType Member(ArgType) + +#define DECL_STATIC_LINK(Class, Member, ArgType, RetType) \ + static RetType LinkStub##Member(void *, ArgType); \ + static RetType Member(Class *, ArgType) + +#define DECL_DLLPRIVATE_LINK(Member, ArgType, RetType) \ + SAL_DLLPRIVATE static RetType LinkStub##Member(void *, ArgType); \ + SAL_DLLPRIVATE RetType Member(ArgType) + +#define DECL_DLLPRIVATE_STATIC_LINK(Class, Member, ArgType, RetType) \ + SAL_DLLPRIVATE static RetType LinkStub##Member(void *, ArgType); \ + SAL_DLLPRIVATE static RetType Member(Class *, ArgType) + +#define IMPL_LINK(Class, Member, ArgType, ArgName, RetType) \ + RetType Class::LinkStub##Member(void * instance, ArgType data) { \ + return static_cast<Class *>(instance)->Member(data); \ + } \ + RetType Class::Member(ArgType ArgName) + +#define IMPL_LINK_NOARG(Class, Member, ArgType, RetType) \ + RetType Class::LinkStub##Member(void * instance, ArgType data) { \ + return static_cast<Class *>(instance)->Member(data); \ + } \ + RetType Class::Member(SAL_UNUSED_PARAMETER ArgType) + +#define IMPL_STATIC_LINK( \ + Class, Member, ArgType, ArgName, RetType) \ + RetType Class::LinkStub##Member(void * instance, ArgType data) { \ + return Member(static_cast<Class *>(instance), data); \ + } \ + RetType Class::Member(SAL_UNUSED_PARAMETER Class *, ArgType ArgName) + +#define IMPL_STATIC_LINK_NOARG( \ + Class, Member, ArgType, RetType) \ + RetType Class::LinkStub##Member(void * instance, ArgType data) { \ + return Member(static_cast<Class *>(instance), data); \ + } \ + RetType Class::Member( \ + SAL_UNUSED_PARAMETER Class *, SAL_UNUSED_PARAMETER ArgType) + +#ifdef DBG_UTIL +#define LINK(Instance, Class, Member) ::tools::detail::makeLink( \ + ::tools::detail::castTo<Class *>(Instance), &Class::LinkStub##Member, __FILE__, __LINE__, SAL_STRINGIFY(Class::LinkStub##Member)) +#else +#define LINK(Instance, Class, Member) ::tools::detail::makeLink( \ + ::tools::detail::castTo<Class *>(Instance), &Class::LinkStub##Member) +#endif + +template<typename Arg, typename Ret> +class SAL_WARN_UNUSED Link { +public: + typedef Ret Stub(void *, Arg); + +#ifdef DBG_UTIL + Link() + : function_(nullptr) + , instance_(nullptr) + , file_("unknown") + , line_(0) + , target_("unknown") + { + } + + Link(void* instance, Stub* function, const char* const file = "unknown", const int line = 0, + const char* const target = "unknown") + : function_(function) + , instance_(instance) + , file_(file) + , line_(line) + , target_(target) + { + } +#else + Link(): function_(nullptr), instance_(nullptr) {} + + Link(void * instance, Stub * function): + function_(function), instance_(instance) {} +#endif + + Ret Call(Arg data) const + { return function_ == nullptr ? Ret() : (*function_)(instance_, data); } + + bool IsSet() const { return function_ != nullptr; } + + bool operator !() const { return !IsSet(); } + + bool operator <(Link const & other) const { + char* ptr1 = reinterpret_cast<char*>(function_); + char* ptr2 = reinterpret_cast<char*>(other.function_); + if (ptr1 < ptr2) + return true; + else if (ptr1 > ptr2) + return false; + else + return instance_ < other.instance_; + }; + + bool operator ==(Link const & other) const + { return function_ == other.function_ && instance_ == other.instance_; }; + + void *GetInstance() const { return instance_; } + +#ifdef DBG_UTIL + const char* getSourceFilename() const { return file_; } + int getSourceLineNumber() const { return line_; } + const char* getTargetName() const { return target_; } +#endif + +private: + Stub * function_; + void * instance_; + +#ifdef DBG_UTIL + /// Support tracing link source and target. + /// When debugging async events, it's often critical + /// to find out not only where a link leads (i.e. the target + /// function), but also where it was created (file:line). + const char* file_; + int line_; + const char* target_; +#endif +}; + +// Class used to indicate that the Call() parameter is not in use: +class LinkParamNone { LinkParamNone() = delete; }; + +namespace tools::detail { + +// Avoids loplugin:redundantcast in LINK macro, in the common case that Instance +// is already of type Class * (instead of a derived type): +template<typename To, typename From> To castTo(From from) +{ return static_cast<To>(from); } + +#ifdef DBG_UTIL +template<typename Arg, typename Ret> +Link<Arg, Ret> makeLink(void * instance, Ret (* function)(void *, Arg), const char* file, int line, const char* target) { + return Link<Arg, Ret>(instance, function, file, line, target); +} +#else +template<typename Arg, typename Ret> +Link<Arg, Ret> makeLink(void * instance, Ret (* function)(void *, Arg)) { + return Link<Arg, Ret>(instance, function); +} +#endif + +} + +#endif + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |