diff options
Diffstat (limited to 'libodb-sqlite/odb/sqlite/statement-cache.txx')
-rw-r--r-- | libodb-sqlite/odb/sqlite/statement-cache.txx | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/libodb-sqlite/odb/sqlite/statement-cache.txx b/libodb-sqlite/odb/sqlite/statement-cache.txx new file mode 100644 index 0000000..c089e32 --- /dev/null +++ b/libodb-sqlite/odb/sqlite/statement-cache.txx @@ -0,0 +1,60 @@ +// file : odb/sqlite/statement-cache.txx +// license : GNU GPL v2; see accompanying LICENSE file + +#include <odb/sqlite/database.hxx> + +namespace odb +{ + namespace sqlite + { + template <typename T> + typename object_traits_impl<T, id_sqlite>::statements_type& + statement_cache:: + find_object () + { + typedef + typename object_traits_impl<T, id_sqlite>::statements_type + statements_type; + + // Clear the cache if the database version has changed. This + // makes sure we don't re-use statements that correspond to + // the old schema. + // + if (version_seq_ != conn_.database ().schema_version_sequence ()) + { + map_.clear (); + version_seq_ = conn_.database ().schema_version_sequence (); + } + + map::iterator i (map_.find (&typeid (T))); + + if (i != map_.end ()) + return static_cast<statements_type&> (*i->second); + + details::shared_ptr<statements_type> p ( + new (details::shared) statements_type (conn_)); + + map_.insert (map::value_type (&typeid (T), p)); + return *p; + } + + template <typename T> + view_statements<T>& statement_cache:: + find_view () + { + // We don't cache any statements for views so no need to clear + // the cache. + + map::iterator i (map_.find (&typeid (T))); + + if (i != map_.end ()) + return static_cast<view_statements<T>&> (*i->second); + + details::shared_ptr<view_statements<T> > p ( + new (details::shared) view_statements<T> (conn_)); + + map_.insert (map::value_type (&typeid (T), p)); + return *p; + } + } +} |