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[datasource] add plugin_registered function

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This commit is contained in:
Mathis Logemann 2022-02-14 10:14:59 +01:00
parent 6fcdccaf83
commit 0f0e06c6b8
2 changed files with 27 additions and 4 deletions
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5
include/mapnik/datasource_cache.hpp
View file

@ -47,7 +47,8 @@ class MAPNIK_DECL datasource_cache : public singleton<datasource_cache, CreateSt
friend class CreateStatic<datasource_cache>;
public:
std::vector<std::string> plugin_names();
bool plugin_registered(const std::string& plugin_name) const;
std::vector<std::string> plugin_names() const;
std::string plugin_directories();
bool register_datasources(std::string const& path, bool recurse = false);
bool register_datasource(std::string const& path);
@ -62,7 +63,7 @@ class MAPNIK_DECL datasource_cache : public singleton<datasource_cache, CreateSt
// but the instance also needs its own mutex to protect the
// plugins_ and plugin_directories_ members which are potentially
// modified recusrively by register_datasources(path, true);
std::recursive_mutex instance_mutex_;
mutable std::recursive_mutex instance_mutex_;
};
extern template class MAPNIK_DECL singleton<datasource_cache, CreateStatic>;

26
src/datasource_cache.cpp
View file

@ -113,7 +113,7 @@ datasource_ptr datasource_cache::create(parameters const& params)
#ifdef __GNUC__
__extension__
#endif
datasource_plugin* create_datasource = reinterpret_cast<datasource_plugin*>(itr->second->get_symbol("plugin"));
datasource_plugin* create_datasource = reinterpret_cast<datasource_plugin*>(itr->second->get_symbol("plugin"));
if (!create_datasource)
{
@ -131,7 +131,29 @@ std::string datasource_cache::plugin_directories()
return boost::algorithm::join(plugin_directories_, ", ");
}
std::vector<std::string> datasource_cache::plugin_names()
bool datasource_cache::plugin_registered(const std::string& plugin_name) const
{
#ifdef MAPNIK_STATIC_PLUGINS
const auto static_names = get_static_datasource_names();
const auto static_it = std::find(static_names.begin(), static_names.end(), plugin_name);
if (static_it != static_names.end())
return true;
#endif
#ifdef MAPNIK_THREADSAFE
std::lock_guard<std::recursive_mutex> lock(instance_mutex_);
#endif
std::map<std::string, std::shared_ptr<PluginInfo>>::const_iterator itr;
for (itr = plugins_.begin(); itr != plugins_.end(); ++itr)
{
if (itr->second->name() == plugin_name)
return true;
}
return false;
}
std::vector<std::string> datasource_cache::plugin_names() const
{
std::vector<std::string> names;