release/src/router/mysql/server-tools/instance-manager/instance_map.h

   1 #ifndef INCLUDES_MYSQL_INSTANCE_MANAGER_INSTANCE_MAP_H
   2 #define INCLUDES_MYSQL_INSTANCE_MANAGER_INSTANCE_MAP_H
   3 /* Copyright (c) 2004-2006 MySQL AB
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; version 2 of the License.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA */
  17
  18 #include <my_global.h>
  19 #include <my_sys.h>
  20 #include <m_string.h>
  21 #include <hash.h>
  22
  23 #if defined(__GNUC__) && defined(USE_PRAGMA_INTERFACE)
  24 #pragma interface
  25 #endif
  26
  27 class Guardian;
  28 class Instance;
  29 class Named_value_arr;
  30 class Thread_registry;
  31
  32 extern int load_all_groups(char ***groups, const char *filename);
  33 extern void free_groups(char **groups);
  34
  35 extern int create_instance_in_file(const LEX_STRING *instance_name,
  36                                    const Named_value_arr *options);
  37
  38
  39 /**
  40   Instance_map - stores all existing instances
  41 */
  42
  43 class Instance_map
  44 {
  45 public:
  46   /**
  47     Instance_map iterator
  48   */
  49
  50   class Iterator
  51   {
  52   private:
  53     uint current_instance;
  54     Instance_map *instance_map;
  55   public:
  56     Iterator(Instance_map *instance_map_arg) :
  57      current_instance(0), instance_map(instance_map_arg)
  58     {}
  59
  60     void go_to_first();
  61     Instance *next();
  62   };
  63
  64 public:
  65   Instance *find(const LEX_STRING *name);
  66
  67   bool is_there_active_instance();
  68
  69   void lock();
  70   void unlock();
  71
  72   bool init();
  73   bool reset();
  74
  75   int load();
  76
  77   int process_one_option(const LEX_STRING *group, const char *option);
  78
  79   int add_instance(Instance *instance);
  80
  81   int remove_instance(Instance *instance);
  82
  83   int create_instance(const LEX_STRING *instance_name,
  84                       const Named_value_arr *options);
  85
  86 public:
  87   Instance_map();
  88   ~Instance_map();
  89
  90 private:
  91   bool complete_initialization();
  92
  93 private:
  94   enum { START_HASH_SIZE = 16 };
  95   pthread_mutex_t LOCK_instance_map;
  96   HASH hash;
  97
  98 private:
  99   friend class Iterator;
 100 };
 101
 102 #endif /* INCLUDES_MYSQL_INSTANCE_MANAGER_INSTANCE_MAP_H */