147 lines
4.1 KiB
C++
147 lines
4.1 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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* $LicenseInfo:firstyear=2008&license=viewergpl$
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*
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* Copyright (c) 2008-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#if LL_DBUS_ENABLED
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#ifdef LL_STANDALONE
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#include <dlfcn.h>
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#include <apr_portable.h>
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#endif
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#include "linden_common.h"
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#include "llaprpool.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(...) lldebugs << llformat(__VA_ARGS__) << llendl
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#define INFOMSG(...) llinfos << llformat(__VA_ARGS__) << llendl
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#define WARNMSG(...) llwarns << llformat(__VA_ARGS__) << llendl
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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 LLAPRPool sSymDBUSDSOMemoryPool; // Used for sSymDBUSDSOHandleG (and what it is pointing at?)
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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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sSymDBUSDSOMemoryPool.create();
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#ifdef LL_STANDALONE
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void *dso_handle = dlopen(dbus_dso_name.c_str(), RTLD_NOW | RTLD_GLOBAL);
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rv = (!dso_handle)?APR_EDSOOPEN:apr_os_dso_handle_put(&sSymDBUSDSOHandle,
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dso_handle, sSymDBUSDSOMemoryPool());
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if ( APR_SUCCESS == rv )
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#else
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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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#endif
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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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if (!sSymsGrabbed)
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{
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sSymDBUSDSOMemoryPool.destroy();
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}
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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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sSymDBUSDSOMemoryPool.destroy();
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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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