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Diffstat (limited to 'indra/llplugin/llplugininstance.cpp')
| -rw-r--r-- | indra/llplugin/llplugininstance.cpp | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/indra/llplugin/llplugininstance.cpp b/indra/llplugin/llplugininstance.cpp new file mode 100644 index 0000000000..58fb792d0d --- /dev/null +++ b/indra/llplugin/llplugininstance.cpp @@ -0,0 +1,140 @@ +/** + * @file llplugininstance.cpp + * @brief LLPluginInstance handles loading the dynamic library of a plugin and setting up its entry points for message passing. + * + * $LicenseInfo:firstyear=2008&license=viewergpl$ + * + * Copyright (c) 2008, 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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 "llplugininstance.h" + +#include "llapr.h" + +//virtual +LLPluginInstanceMessageListener::~LLPluginInstanceMessageListener() +{ +} + +const char *LLPluginInstance::PLUGIN_INIT_FUNCTION_NAME = "LLPluginInitEntryPoint"; + +LLPluginInstance::LLPluginInstance(LLPluginInstanceMessageListener *owner) : + mDSOHandle(NULL), + mPluginUserData(NULL), + mPluginSendMessageFunction(NULL) +{ + mOwner = owner; +} + +LLPluginInstance::~LLPluginInstance() +{ + if(mDSOHandle != NULL) + { + apr_dso_unload(mDSOHandle); + mDSOHandle = NULL; + } +} + +int LLPluginInstance::load(std::string &plugin_file) +{ + pluginInitFunction init_function = NULL; + + int result = apr_dso_load(&mDSOHandle, + plugin_file.c_str(), + gAPRPoolp); + if(result != APR_SUCCESS) + { + char buf[1024]; + apr_dso_error(mDSOHandle, buf, sizeof(buf)); + + LL_WARNS("Plugin") << "apr_dso_load of " << plugin_file << " failed with error " << result << " , additional info string: " << buf << LL_ENDL; + + } + + if(result == APR_SUCCESS) + { + result = apr_dso_sym((apr_dso_handle_sym_t*)&init_function, + mDSOHandle, + PLUGIN_INIT_FUNCTION_NAME); + + if(result != APR_SUCCESS) + { + LL_WARNS("Plugin") << "apr_dso_sym failed with error " << result << LL_ENDL; + } + } + + if(result == APR_SUCCESS) + { + result = init_function(staticReceiveMessage, (void*)this, &mPluginSendMessageFunction, &mPluginUserData); + + if(result != APR_SUCCESS) + { + LL_WARNS("Plugin") << "call to init function failed with error " << result << LL_ENDL; + } + } + + return (int)result; +} + +void LLPluginInstance::sendMessage(const std::string &message) +{ + if(mPluginSendMessageFunction) + { + LL_DEBUGS("Plugin") << "sending message to plugin: \"" << message << "\"" << LL_ENDL; + mPluginSendMessageFunction(message.c_str(), &mPluginUserData); + } + else + { + LL_WARNS("Plugin") << "dropping message: \"" << message << "\"" << LL_ENDL; + } +} + +void LLPluginInstance::idle(void) +{ +} + +// static +void LLPluginInstance::staticReceiveMessage(const char *message_string, void **user_data) +{ + // TODO: validate that the user_data argument is still a valid LLPluginInstance pointer + // we could also use a key that's looked up in a map (instead of a direct pointer) for safety, but that's probably overkill + LLPluginInstance *self = (LLPluginInstance*)*user_data; + self->receiveMessage(message_string); +} + +void LLPluginInstance::receiveMessage(const char *message_string) +{ + if(mOwner) + { + LL_DEBUGS("Plugin") << "processing incoming message: \"" << message_string << "\"" << LL_ENDL; + mOwner->receivePluginMessage(message_string); + } + else + { + LL_WARNS("Plugin") << "dropping incoming message: \"" << message_string << "\"" << LL_ENDL; + } +} |