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