mirror of
https://github.com/amyinspace/MagicSetEditor2.git
synced 2026-06-10 13:06:59 -04:00
Twan van Laarhoven
120 lines
3.3 KiB
C++
120 lines
3.3 KiB
C++
//+----------------------------------------------------------------------------+
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//| Description: Magic Set Editor - Program to make Magic (tm) cards |
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//| Copyright: (C) Twan van Laarhoven and the other MSE developers |
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//| License: GNU General Public License 2 or later (see file COPYING) |
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//+----------------------------------------------------------------------------+
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#pragma once
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/** @file util/dynamic_arg.hpp
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*
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* @brief Support for 'dynamicly scopped' arguments.
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* This header
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*/
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// ----------------------------------------------------------------------------- : Includes
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#include <util/prec.hpp>
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#include <wx/thread.h>
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// ----------------------------------------------------------------------------- : Dynamic argument
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#ifdef _MSC_VER
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# define THREAD_LOCAL __declspec(thread)
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# define HAVE_TLS 1
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#elif defined __GNUC__
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# define THREAD_LOCAL __thread
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# define HAVE_TLS 1
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#else
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# define HAVE_TLS 0
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#endif
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#if HAVE_TLS
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/// Declare a dynamic argument.
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/** The value of the argument can be got with: name()
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* To change the value use WITH_DYNAMIC_ARG(name, newValue)
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* To be used in a header file. Use IMPLEMENT_DYN_ARG in a source file
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*/
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#define DECLARE_DYNAMIC_ARG(Type, name) \
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extern THREAD_LOCAL Type name##_private; \
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inline Type name() { return name##_private; } \
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class name##_changer { \
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public: \
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inline name##_changer(Type const& newValue) \
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: oldValue(name##_private) { \
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name##_private = newValue; \
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} \
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inline ~name##_changer() { \
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name##_private = oldValue; \
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} \
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private: \
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Type oldValue; \
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}
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/// Implementation of a dynamic argument
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#define IMPLEMENT_DYNAMIC_ARG(Type, name, initial) \
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THREAD_LOCAL Type name##_private = initial;
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/// Locally change the value of a dynamic argument
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/** Usage:
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* @code
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* // here name() == old value
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* {
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* WITH_DYNAMIC_ARG(name, newValue);
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* // here name() == newValue
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* }
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* // here name() == old value
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* @endcode
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*/
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#define WITH_DYNAMIC_ARG(name, value) \
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name##_changer name##_dummmy(value)
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#else
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template <typename T> struct ThreadLocalObject {
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map<int,T*> objects;
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T def;
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wxCriticalSection container_access;
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inline T operator () () {
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wxCriticalSectionLocker lock(container_access);
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T*& p = objects[wxThread::GetCurrentId()];
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if (!p) {
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p = new T(def);
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}
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return *objects[wxThread::GetCurrentId()];
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}
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inline void store (T value) {
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wxCriticalSectionLocker lock(container_access);
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T*& p = objects[wxThread::GetCurrentId()];
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if (!p) {
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p = new T(def);
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}
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*objects[wxThread::GetCurrentId()] = value;
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}
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ThreadLocalObject (T def)
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: def(def)
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{}
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~ThreadLocalObject () {
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for (typename map<int,T*>::iterator i = objects.begin(); i != objects.end(); ++i) {
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delete (*i).second;
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}
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}
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};
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#define DECLARE_DYNAMIC_ARG(Type, name) \
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extern ThreadLocalObject<Type> name;
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#define IMPLEMENT_DYNAMIC_ARG(Type, name, initial) \
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ThreadLocalObject<Type> name (initial);
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#define WITH_DYNAMIC_ARG(name, value) \
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name.store(value);
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#endif
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