/** * @file llappviewerlinux_api_dbus.cpp * @brief dynamic DBus symbol-grabbing code * * $LicenseInfo:firstyear=2008&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #if LL_DBUS_ENABLED #include "linden_common.h" extern "C" { #include <dbus/dbus-glib.h> #include "apr_pools.h" #include "apr_dso.h" } #define DEBUGMSG(...) do { LL_DEBUGS() << llformat(__VA_ARGS__) << LL_ENDL; } while(0) #define INFOMSG(...) do { LL_INFOS() << llformat(__VA_ARGS__) << LL_ENDL; } while(0) #define WARNMSG(...) do { LL_WARNS() << llformat(__VA_ARGS__) << LL_ENDL; } while(0) #define LL_DBUS_SYM(REQUIRED, DBUSSYM, RTN, ...) RTN (*ll##DBUSSYM)(__VA_ARGS__) = NULL #include "llappviewerlinux_api_dbus_syms_raw.inc" #undef LL_DBUS_SYM static bool sSymsGrabbed = false; static apr_pool_t *sSymDBUSDSOMemoryPool = NULL; static apr_dso_handle_t *sSymDBUSDSOHandleG = NULL; bool grab_dbus_syms(std::string dbus_dso_name) { if (sSymsGrabbed) { // already have grabbed good syms return TRUE; } bool sym_error = false; bool rtn = false; apr_status_t rv; apr_dso_handle_t *sSymDBUSDSOHandle = NULL; #define LL_DBUS_SYM(REQUIRED, DBUSSYM, RTN, ...) do{rv = apr_dso_sym((apr_dso_handle_sym_t*)&ll##DBUSSYM, sSymDBUSDSOHandle, #DBUSSYM); if (rv != APR_SUCCESS) {INFOMSG("Failed to grab symbol: %s", #DBUSSYM); if (REQUIRED) sym_error = true;} else DEBUGMSG("grabbed symbol: %s from %p", #DBUSSYM, (void*)ll##DBUSSYM);}while(0) //attempt to load the shared library apr_pool_create(&sSymDBUSDSOMemoryPool, NULL); if ( APR_SUCCESS == (rv = apr_dso_load(&sSymDBUSDSOHandle, dbus_dso_name.c_str(), sSymDBUSDSOMemoryPool) )) { INFOMSG("Found DSO: %s", dbus_dso_name.c_str()); #include "llappviewerlinux_api_dbus_syms_raw.inc" if ( sSymDBUSDSOHandle ) { sSymDBUSDSOHandleG = sSymDBUSDSOHandle; sSymDBUSDSOHandle = NULL; } rtn = !sym_error; } else { INFOMSG("Couldn't load DSO: %s", dbus_dso_name.c_str()); rtn = false; // failure } if (sym_error) { WARNMSG("Failed to find necessary symbols in DBUS-GLIB libraries."); } #undef LL_DBUS_SYM sSymsGrabbed = rtn; return rtn; } void ungrab_dbus_syms() { // should be safe to call regardless of whether we've // actually grabbed syms. if ( sSymDBUSDSOHandleG ) { apr_dso_unload(sSymDBUSDSOHandleG); sSymDBUSDSOHandleG = NULL; } if ( sSymDBUSDSOMemoryPool ) { apr_pool_destroy(sSymDBUSDSOMemoryPool); sSymDBUSDSOMemoryPool = NULL; } // NULL-out all of the symbols we'd grabbed #define LL_DBUS_SYM(REQUIRED, DBUSSYM, RTN, ...) do{ll##DBUSSYM = NULL;}while(0) #include "llappviewerlinux_api_dbus_syms_raw.inc" #undef LL_DBUS_SYM sSymsGrabbed = false; } #endif // LL_DBUS_ENABLED