diff options
| -rw-r--r-- | indra/llcommon/CMakeLists.txt | 1 | ||||
| -rw-r--r-- | indra/llcommon/llsingleton.cpp | 38 | ||||
| -rw-r--r-- | indra/llcommon/llsingleton.h | 33 |
3 files changed, 71 insertions, 1 deletions
diff --git a/indra/llcommon/CMakeLists.txt b/indra/llcommon/CMakeLists.txt index 410cd0f6b2..7fe4491a8b 100644 --- a/indra/llcommon/CMakeLists.txt +++ b/indra/llcommon/CMakeLists.txt @@ -74,6 +74,7 @@ set(llcommon_SOURCE_FILES llsdserialize_xml.cpp llsdutil.cpp llsecondlifeurls.cpp + llsingleton.cpp llstat.cpp llstacktrace.cpp llstreamtools.cpp diff --git a/indra/llcommon/llsingleton.cpp b/indra/llcommon/llsingleton.cpp new file mode 100644 index 0000000000..62988cdc64 --- /dev/null +++ b/indra/llcommon/llsingleton.cpp @@ -0,0 +1,38 @@ +/** + * @file llsingleton.cpp + * @author Brad Kittenbrink + * + * $LicenseInfo:firstyear=2009&license=viewergpl$ + * + * Copyright (c) 2009-2009, Linden Research, Inc. + * + * Second Life Viewer Source Code + * The source code in this file ("Source Code") is provided by Linden Lab + * to you under the terms of the GNU General Public License, version 2.0 + * ("GPL"), unless you have obtained a separate licensing agreement + * ("Other License"), formally executed by you and Linden Lab. Terms of + * the GPL can be found in doc/GPL-license.txt in this distribution, or + * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 + * + * There are special exceptions to the terms and conditions of the GPL as + * it is applied to this Source Code. View the full text of the exception + * in the file doc/FLOSS-exception.txt in this software distribution, or + * online at + * http://secondlifegrid.net/programs/open_source/licensing/flossexception + * + * By copying, modifying or distributing this software, you acknowledge + * that you have read and understood your obligations described above, + * and agree to abide by those obligations. + * + * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO + * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, + * COMPLETENESS OR PERFORMANCE. + * $/LicenseInfo$ + */ + +#include "linden_common.h" + +#include "llsingleton.h" + +std::map<std::string, void *> LLSingletonRegistry::sSingletonMap; + diff --git a/indra/llcommon/llsingleton.h b/indra/llcommon/llsingleton.h index dc1457e4f7..cd3963b260 100644 --- a/indra/llcommon/llsingleton.h +++ b/indra/llcommon/llsingleton.h @@ -33,7 +33,30 @@ #include "llerror.h" // *TODO: eliminate this +#include <typeinfo> #include <boost/noncopyable.hpp> +#include <boost/any.hpp> + +/// @brief A global registry of all singletons to prevent duplicate allocations +/// across shared library boundaries +class LL_COMMON_API LLSingletonRegistry { + private: + typedef std::map<std::string, void *> TypeMap; + static TypeMap sSingletonMap; + + public: + template<typename T> static void * & get() + { + std::string name(typeid(T).name()); + + if(0 == sSingletonMap.count(name)) + { + sSingletonMap[name] = NULL; + } + + return sSingletonMap[typeid(T).name()]; + } +}; // LLSingleton implements the getInstance() method part of the Singleton // pattern. It can't make the derived class constructors protected, though, so @@ -107,8 +130,16 @@ public: static SingletonInstanceData& getData() { + void * & registry = LLSingletonRegistry::get<DERIVED_TYPE>(); static SingletonInstanceData data; - return data; + + // *TODO - look into making this threadsafe + if(NULL == registry) + { + registry = &data; + } + + return *static_cast<SingletonInstanceData *>(registry); } static DERIVED_TYPE* getInstance() |