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/**
* @file llappviewerlinux_api_dbus.cpp
* @brief dynamic DBus symbol-grabbing code
*
* $LicenseInfo:firstyear=2008&license=viewergpl$
*
* Copyright (c) 2008-2009, 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.
* $/LicenseInfo$
*/
#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(...) lldebugs << llformat(__VA_ARGS__) << llendl
#define INFOMSG(...) llinfos << llformat(__VA_ARGS__) << llendl
#define WARNMSG(...) llwarns << llformat(__VA_ARGS__) << llendl
#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
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