60     sDb.mutex = sqlite3MutexAlloc(SQLITE_MUTEX_RECURSIVE);  in btree_open()
61     sqlite3_mutex_enter(sDb.mutex);  in btree_open()
107     sqlite3_mutex_leave(sDb.mutex);  in btree_close()
108     sqlite3_mutex_free(sDb.mutex);  in btree_close()
109     sDb.mutex = 0;  in btree_close()
174   sqlite3_mutex_enter(pBt->db->mutex);  in btree_pager_stats()
191   sqlite3_mutex_leave(pBt->db->mutex);  in btree_pager_stats()
224   sqlite3_mutex_enter(pBt->db->mutex);  in btree_cursor()
233   sqlite3_mutex_leave(pBt->db->mutex);  in btree_cursor()
267     sqlite3_mutex_enter(pBt->db->mutex);  in btree_close_cursor()
271     sqlite3_mutex_leave(pBt->db->mutex);  in btree_close_cursor()
572   sqlite3_mutex_enter(pBt->db->mutex);  in btree_ismemdb()
577   sqlite3_mutex_leave(pBt->db->mutex);  in btree_ismemdb()
604   sqlite3_mutex_enter(pBt->db->mutex);  in btree_set_cache_size()
608   sqlite3_mutex_leave(pBt->db->mutex);  in btree_set_cache_size()
643   sqlite3_mutex_enter(pCur->pBtree->db->mutex);  in btree_insert()
647   sqlite3_mutex_leave(pCur->pBtree->db->mutex);  in btree_insert()