// In header: </Users/bobw/workspace/stldb_lib/stldb/logger.h>

template<typename void_alloc_t, typename mutex_type> 
struct SharedLogInfo {
  // types
  typedef void_alloc_t::template rebind< char >::other                                          shm_char_alloc_t;  
  typedef boost::interprocess::basic_string< char, std::char_traits< char >, shm_char_alloc_t > shm_string;        
  typedef std::pair< stldb::commit_buffer_t< void_alloc_t > *, transaction_id_t >               waiting_write;     
  typedef void_alloc_t::template rebind< waiting_write >::other                                 shm_txn_id_alloc_t;

  // construct/copy/destruct
  SharedLogInfo(const void_alloc_t &);
  mutex_type _queue_mutex;
  mutex_type _file_mutex;
  transaction_id_t _next_commit_txn_id;
  transaction_id_t _last_write_txn_id;
  transaction_id_t _last_sync_txn_id;
  boost::interprocess::deque< waiting_write, shm_txn_id_alloc_t > waiting_txns;
  shm_string log_dir;
  shm_string log_filename;
  boost::interprocess::offset_t log_len;
  boost::interprocess::offset_t log_max_len;
  bool log_sync;
  struct log_stats stats;
};