bool datasource_cache::register_datasource(std::string const& str)
{
bool success = false;
try
{
lt_dlhandle module = lt_dlopen(str.c_str());
if (module)
{
// http://www.mr-edd.co.uk/blog/supressing_gcc_warnings
#ifdef __GNUC__
__extension__
#endif
datasource_name* ds_name =
reinterpret_cast<datasource_name*>(lt_dlsym(module, "datasource_name"));
if (ds_name && insert(ds_name(),module))
{
MAPNIK_LOG_DEBUG(datasource_cache) << "datasource_cache: Registered=" << ds_name();
success = true;
}
else if (!ds_name)
{
MAPNIK_LOG_ERROR(datasource_cache)
<< "Problem loading plugin library '"
<< str << "' (plugin is lacking compatible interface)";
}
}
else
{
MAPNIK_LOG_ERROR(datasource_cache)
<< "Problem loading plugin library: " << str
<< " (dlopen failed - plugin likely has an unsatisfied dependency or incompatible ABI)";
}
}
catch (...) {
MAPNIK_LOG_ERROR(datasource_cache)
<< "Exception caught while loading plugin library: " << str;
}
return success;
}
void datasource_cache::register_datasources(const std::string& str)
{
#ifdef MAPNIK_THREADSAFE
mutex::scoped_lock lock(mapnik::singleton<mapnik::datasource_cache,
mapnik::CreateStatic>::mutex_);
#endif
boost::filesystem::path path(str);
plugin_directories_.push_back(str);
boost::filesystem::directory_iterator end_itr;
if (exists(path) && is_directory(path))
{
for (boost::filesystem::directory_iterator itr(path);itr!=end_itr;++itr )
{
#if BOOST_VERSION < 103400
if (!is_directory( *itr ) && is_input_plugin(itr->leaf()))
#else
#if (BOOST_FILESYSTEM_VERSION == 3)
if (!is_directory( *itr ) && is_input_plugin(itr->path().filename().string()))
#else // v2
if (!is_directory( *itr ) && is_input_plugin(itr->path().leaf()))
#endif
#endif
{
try
{
#ifdef LIBTOOL_SUPPORTS_ADVISE
/* Note: the below was added as a workaround pre http://trac.mapnik.org/ticket/790
It could now be removed, but also is not doing any harm AFAICT.
*/
// with ltdl >=2.2 we can actually pass RTDL_GLOBAL to dlopen via the
// ltdl advise trick which is required on linux unless plugins are directly
// linked to libmapnik (and deps) at build time. The only other approach is to
// set the dlopen flags in the calling process (like in the python bindings)
// clear errors
lt_dlerror();
lt_dlhandle module = 0;
lt_dladvise advise;
int ret;
ret = lt_dlinit();
if (ret != 0) {
std::clog << "Datasource loader: could not intialize dynamic loading: " << lt_dlerror() << "\n";
}
ret = lt_dladvise_init(&advise);
if (ret != 0) {
std::clog << "Datasource loader: could not intialize dynamic loading: " << lt_dlerror() << "\n";
}
ret = lt_dladvise_global(&advise);
if (ret != 0) {
std::clog << "Datasource loader: could not intialize dynamic loading of global symbols: " << lt_dlerror() << "\n";
}
#if (BOOST_FILESYSTEM_VERSION == 3)
module = lt_dlopenadvise (itr->path().string().c_str(), advise);
#else // v2
module = lt_dlopenadvise (itr->string().c_str(), advise);
#endif
lt_dladvise_destroy(&advise);
#else
#if (BOOST_FILESYSTEM_VERSION == 3)
lt_dlhandle module = lt_dlopen(itr->path().string().c_str());
#else // v2
lt_dlhandle module = lt_dlopen(itr->string().c_str());
#endif
#endif
if (module)
{
// http://www.mr-edd.co.uk/blog/supressing_gcc_warnings
#ifdef __GNUC__
__extension__
#endif
datasource_name* ds_name =
reinterpret_cast<datasource_name*>(lt_dlsym(module, "datasource_name"));
if (ds_name && insert(ds_name(),module))
{
#ifdef MAPNIK_DEBUG
std::clog << "Datasource loader: registered: " << ds_name() << std::endl;
#endif
registered_=true;
}
}
else
{
#if (BOOST_FILESYSTEM_VERSION == 3)
std::clog << "Problem loading plugin library: " << itr->path().string()
<< " (dlopen failed - plugin likely has an unsatisfied dependency or incompatible ABI)" << std::endl;
#else // v2
std::clog << "Problem loading plugin library: " << itr->string()
<< " (dlopen failed - plugin likely has an unsatisfied dependency or incompatible ABI)" << std::endl;
#endif
}
}
catch (...) {}
}
}
}
}