Cleanup: manually port the polishing parts from Alik's changeset for

BUG#22306: STOP INSTANCE can not be applied for instances in Crashed,
Failed and Abandoned

mysql-test/t/im_options.imtest

@@ -32,33 +32,7 @@
 #
 ###########################################################################
 
---source include/im_check_os.inc
-
-###########################################################################
-#
-# Check starting conditions.
-#
-###########################################################################
-
-# - check the configuration file;
-
---echo --------------------------------------------------------------------
---exec grep '^server_id[^a-zA-Z0-9_-]' $MYSQLTEST_VARDIR/im.cnf ;
---echo --------------------------------------------------------------------
-
-# - check the running instances.
-
---connect (mysql1_con,localhost,root,,mysql,$IM_MYSQLD1_PORT,$IM_MYSQLD1_SOCK)
-
---connection mysql1_con
-
-SHOW VARIABLES LIKE 'server_id';
-
---connection default
-
-# - check the internal cache.
-
-SHOW INSTANCES;
+--source include/im_check_env.inc
 
 ###########################################################################
 #

server-tools/instance-manager/IMService.cpp

@@ -21,22 +21,22 @@ void IMService::Stop()
 {
   ReportStatus(SERVICE_STOP_PENDING);
 
-  // stop the IM work
+  /* stop the IM work */
   raise(SIGTERM);
 }
 
 void IMService::Run(DWORD argc, LPTSTR *argv)
 {
-  // report to the SCM that we're about to start
+  /* report to the SCM that we're about to start */
   ReportStatus((DWORD)SERVICE_START_PENDING);
 
   Options::load(argc, argv);
 
-  // init goes here
+  /* init goes here */
   ReportStatus((DWORD)SERVICE_RUNNING);
 
-  // wait for main loop to terminate
-  manager();
+  /* wait for main loop to terminate */
+  (void) Manager::main();
   Options::cleanup();
 }
 

server-tools/instance-manager/Makefile.am

@@ -61,6 +61,8 @@ client_settings.h:
 
 libexec_PROGRAMS= mysqlmanager
 
+mysqlmanager_CXXFLAGS=  -Werror
+
 mysqlmanager_SOURCES=	command.cc command.h mysqlmanager.cc \
 			manager.h manager.cc log.h log.cc \
 			thread_registry.h thread_registry.cc \

server-tools/instance-manager/command.cc

@@ -19,10 +19,12 @@
 #endif
 
 #include "command.h"
+#include "manager.h"
 
 
-Command::Command(Instance_map *instance_map_arg)
-  :instance_map(instance_map_arg)
+Command::Command()
+  :guardian(Manager::get_guardian()),
+  instance_map(Manager::get_instance_map())
 {}
 
 Command::~Command()

server-tools/instance-manager/command.h

@@ -24,6 +24,7 @@
 
 /* Class responsible for allocation of IM commands. */
 
+class Guardian;
 class Instance_map;
 
 struct st_net;
@@ -36,7 +37,7 @@ struct st_net;
 class Command
 {
 public:
-  Command(Instance_map *instance_map_arg= 0);
+  Command();
   virtual ~Command();
 
   /*
@@ -53,6 +54,7 @@ public:
   virtual int execute(st_net *net, ulong connection_id) = 0;
 
 protected:
+  Guardian *guardian;
   Instance_map *instance_map;
 };
 

server-tools/instance-manager/commands.cc

@@ -242,10 +242,8 @@ int Flush_instances::execute(st_net *net, ulong connection_id)
  Implementation of Abstract_instance_cmd.
 **************************************************************************/
 
-Abstract_instance_cmd::Abstract_instance_cmd(
-  Instance_map *instance_map_arg, const LEX_STRING *instance_name_arg)
-  :Command(instance_map_arg),
-  instance_name(instance_name_arg)
+Abstract_instance_cmd::Abstract_instance_cmd(const LEX_STRING *instance_name_arg)
+  :instance_name(instance_name_arg)
 {
   /*
     MT-NOTE: we can not make a search for Instance object here,
@@ -285,9 +283,8 @@ int Abstract_instance_cmd::execute(st_net *net, ulong connection_id)
  Implementation of Show_instance_status.
 **************************************************************************/
 
-Show_instance_status::Show_instance_status(Instance_map *instance_map_arg,
-                                           const LEX_STRING *instance_name_arg)
-  :Abstract_instance_cmd(instance_map_arg, instance_name_arg)
+Show_instance_status::Show_instance_status(const LEX_STRING *instance_name_arg)
+  :Abstract_instance_cmd(instance_name_arg)
 {
 }
 
@@ -406,8 +403,8 @@ int Show_instance_status::write_data(st_net *net, Instance *instance)
 **************************************************************************/
 
 Show_instance_options::Show_instance_options(
-  Instance_map *instance_map_arg, const LEX_STRING *instance_name_arg)
-  :Abstract_instance_cmd(instance_map_arg, instance_name_arg)
+  const LEX_STRING *instance_name_arg)
+  :Abstract_instance_cmd(instance_name_arg)
 {
 }
 
@@ -501,9 +498,8 @@ int Show_instance_options::write_data(st_net *net, Instance *instance)
  Implementation of Start_instance.
 **************************************************************************/
 
-Start_instance::Start_instance(Instance_map *instance_map_arg,
-                               const LEX_STRING *instance_name_arg)
-  :Abstract_instance_cmd(instance_map_arg, instance_name_arg)
+Start_instance::Start_instance(const LEX_STRING *instance_name_arg)
+  :Abstract_instance_cmd(instance_name_arg)
 {
 }
 
@@ -543,9 +539,8 @@ int Start_instance::send_ok_response(st_net *net, ulong connection_id)
  Implementation of Stop_instance.
 **************************************************************************/
 
-Stop_instance::Stop_instance(Instance_map *instance_map_arg,
-                             const LEX_STRING *instance_name_arg)
-  :Abstract_instance_cmd(instance_map_arg, instance_name_arg)
+Stop_instance::Stop_instance(const LEX_STRING *instance_name_arg)
+  :Abstract_instance_cmd(instance_name_arg)
 {
 }
 
@@ -585,10 +580,8 @@ int Stop_instance::send_ok_response(st_net *net, ulong connection_id)
  Implementation for Create_instance.
 **************************************************************************/
 
-Create_instance::Create_instance(Instance_map *instance_map_arg,
-                                 const LEX_STRING *instance_name_arg)
-  :Command(instance_map_arg),
-  instance_name(instance_name_arg)
+Create_instance::Create_instance(const LEX_STRING *instance_name_arg)
+  :instance_name(instance_name_arg)
 {
 }
 
@@ -795,9 +788,8 @@ int Create_instance::execute(st_net *net, ulong connection_id)
  Implementation for Drop_instance.
 **************************************************************************/
 
-Drop_instance::Drop_instance(Instance_map *instance_map_arg,
-                             const LEX_STRING *instance_name_arg)
-  :Abstract_instance_cmd(instance_map_arg, instance_name_arg)
+Drop_instance::Drop_instance(const LEX_STRING *instance_name_arg)
+  :Abstract_instance_cmd(instance_name_arg)
 {
 }
 
@@ -863,11 +855,10 @@ int Drop_instance::send_ok_response(st_net *net, ulong connection_id)
  Implementation for Show_instance_log.
 **************************************************************************/
 
-Show_instance_log::Show_instance_log(Instance_map *instance_map_arg,
-                                     const LEX_STRING *instance_name_arg,
+Show_instance_log::Show_instance_log(const LEX_STRING *instance_name_arg,
                                      Log_type log_type_arg,
                                      uint size_arg, uint offset_arg)
-  :Abstract_instance_cmd(instance_map_arg, instance_name_arg),
+  :Abstract_instance_cmd(instance_name_arg),
   log_type(log_type_arg),
   size(size_arg),
   offset(offset_arg)
@@ -1013,9 +1004,8 @@ int Show_instance_log::write_data(st_net *net, Instance *instance)
 **************************************************************************/
 
 Show_instance_log_files::Show_instance_log_files
-              (Instance_map *instance_map_arg,
-               const LEX_STRING *instance_name_arg)
-  :Abstract_instance_cmd(instance_map_arg, instance_name_arg)
+              (const LEX_STRING *instance_name_arg)
+  :Abstract_instance_cmd(instance_name_arg)
 {
 }
 
@@ -1214,9 +1204,8 @@ C_MODE_END
 
 /**************************************************************************/
 
-Abstract_option_cmd::Abstract_option_cmd(Instance_map *instance_map_arg)
-  :Command(instance_map_arg),
-  initialized(FALSE)
+Abstract_option_cmd::Abstract_option_cmd()
+  :initialized(FALSE)
 {
 }
 
@@ -1400,12 +1389,6 @@ int Abstract_option_cmd::execute_impl(st_net *net, ulong connection_id)
  Implementation of Set_option.
 **************************************************************************/
 
-Set_option::Set_option(Instance_map *instance_map_arg)
-  :Abstract_option_cmd(instance_map_arg)
-{
-}
-
-
 /*
   This operation parses SET options.
 
@@ -1580,12 +1563,6 @@ int Set_option::process_option(Instance *instance, Named_value *option)
  Implementation of Unset_option.
 **************************************************************************/
 
-Unset_option::Unset_option(Instance_map *instance_map_arg)
-  :Abstract_option_cmd(instance_map_arg)
-{
-}
-
-
 /*
   This operation parses UNSET options.
 

server-tools/instance-manager/commands.h

@@ -38,9 +38,6 @@
 class Show_instances : public Command
 {
 public:
-  Show_instances(Instance_map *instance_map_arg): Command(instance_map_arg)
-  {}
-
   int execute(st_net *net, ulong connection_id);
 
 private:
@@ -57,9 +54,6 @@ private:
 class Flush_instances : public Command
 {
 public:
-  Flush_instances(Instance_map *instance_map_arg): Command(instance_map_arg)
-  {}
-
   int execute(st_net *net, ulong connection_id);
 };
 
@@ -71,8 +65,7 @@ public:
 class Abstract_instance_cmd : public Command
 {
 public:
-  Abstract_instance_cmd(Instance_map *instance_map_arg,
-                        const LEX_STRING *instance_name_arg);
+  Abstract_instance_cmd(const LEX_STRING *instance_name_arg);
 
 public:
   virtual int execute(st_net *net, ulong connection_id);
@@ -108,8 +101,7 @@ private:
 class Show_instance_status : public Abstract_instance_cmd
 {
 public:
-  Show_instance_status(Instance_map *instance_map_arg,
-                       const LEX_STRING *instance_name_arg);
+  Show_instance_status(const LEX_STRING *instance_name_arg);
 
 protected:
   virtual int execute_impl(st_net *net, Instance *instance);
@@ -129,8 +121,7 @@ private:
 class Show_instance_options : public Abstract_instance_cmd
 {
 public:
-  Show_instance_options(Instance_map *instance_map_arg,
-                        const LEX_STRING *instance_name_arg);
+  Show_instance_options(const LEX_STRING *instance_name_arg);
 
 protected:
   virtual int execute_impl(st_net *net, Instance *instance);
@@ -150,8 +141,7 @@ private:
 class Start_instance : public Abstract_instance_cmd
 {
 public:
-  Start_instance(Instance_map *instance_map_arg,
-                 const LEX_STRING *instance_name_arg);
+  Start_instance(const LEX_STRING *instance_name_arg);
 
 protected:
   virtual int execute_impl(st_net *net, Instance *instance);
@@ -167,8 +157,7 @@ protected:
 class Stop_instance : public Abstract_instance_cmd
 {
 public:
-  Stop_instance(Instance_map *instance_map_arg,
-                const LEX_STRING *instance_name_arg);
+  Stop_instance(const LEX_STRING *instance_name_arg);
 
 protected:
   virtual int execute_impl(st_net *net, Instance *instance);
@@ -184,8 +173,7 @@ protected:
 class Create_instance : public Command
 {
 public:
-  Create_instance(Instance_map *instance_map_arg,
-                  const LEX_STRING *instance_name_arg);
+  Create_instance(const LEX_STRING *instance_name_arg);
 
 public:
   bool init(const char **text);
@@ -220,8 +208,7 @@ private:
 class Drop_instance : public Abstract_instance_cmd
 {
 public:
-  Drop_instance(Instance_map *instance_map_arg,
-                const LEX_STRING *instance_name_arg);
+  Drop_instance(const LEX_STRING *instance_name_arg);
 
 protected:
   virtual int execute_impl(st_net *net, Instance *instance);
@@ -238,8 +225,7 @@ protected:
 class Show_instance_log : public Abstract_instance_cmd
 {
 public:
-  Show_instance_log(Instance_map *instance_map_arg,
-                    const LEX_STRING *instance_name_arg,
+  Show_instance_log(const LEX_STRING *instance_name_arg,
                     Log_type log_type_arg, uint size_arg, uint offset_arg);
 
 protected:
@@ -266,8 +252,7 @@ private:
 class Show_instance_log_files : public Abstract_instance_cmd
 {
 public:
-  Show_instance_log_files(Instance_map *instance_map_arg,
-                          const LEX_STRING *instance_name_arg);
+  Show_instance_log_files(const LEX_STRING *instance_name_arg);
 
 protected:
   virtual int execute_impl(st_net *net, Instance *instance);
@@ -299,7 +284,7 @@ public:
   virtual int execute(st_net *net, ulong connection_id);
 
 protected:
-  Abstract_option_cmd(Instance_map *instance_map_arg);
+  Abstract_option_cmd();
 
   int correct_file(Instance *instance, Named_value *option, bool skip);
 
@@ -326,9 +311,6 @@ private:
 
 class Set_option : public Abstract_option_cmd
 {
-public:
-  Set_option(Instance_map *instance_map_arg);
-
 protected:
   virtual bool parse_args(const char **text);
   virtual int process_option(Instance *instance, Named_value *option);
@@ -342,9 +324,6 @@ protected:
 
 class Unset_option: public Abstract_option_cmd
 {
-public:
-  Unset_option(Instance_map *instance_map_arg);
-
 protected:
   virtual bool parse_args(const char **text);
   virtual int process_option(Instance *instance, Named_value *option);
@@ -362,11 +341,6 @@ protected:
 
 class Syntax_error : public Command
 {
-public:
-  /* This is just to avoid compiler warning. */
-  Syntax_error() :Command(NULL)
-  {}
-
 public:
   int execute(st_net *net, ulong connection_id);
 };

server-tools/instance-manager/guardian.cc

@@ -31,16 +31,16 @@
 #include "mysql_manager_error.h"
 
 
-pthread_handler_t guardian(void *arg)
+pthread_handler_t guardian_thread_func(void *arg)
 {
-  Guardian_thread *guardian_thread= (Guardian_thread *) arg;
-  guardian_thread->run();
+  Guardian *guardian= (Guardian *) arg;
+  guardian->run();
   return 0;
 }
 
 
 const char *
-Guardian_thread::get_instance_state_name(enum_instance_state state)
+Guardian::get_instance_state_name(enum_instance_state state)
 {
   switch (state) {
   case NOT_STARTED:
@@ -69,10 +69,10 @@ Guardian_thread::get_instance_state_name(enum_instance_state state)
 }
 
 
-Guardian_thread::Guardian_thread(Thread_registry &thread_registry_arg,
+Guardian::Guardian(Thread_registry &thread_registry_arg,
                                  Instance_map *instance_map_arg,
                                  uint monitoring_interval_arg) :
-  Guardian_thread_args(thread_registry_arg, instance_map_arg,
+  Guardian_args(thread_registry_arg, instance_map_arg,
                        monitoring_interval_arg),
   thread_info(pthread_self(), TRUE), guarded_instances(0)
 {
@@ -84,7 +84,7 @@ Guardian_thread::Guardian_thread(Thread_registry &thread_registry_arg,
 }
 
 
-Guardian_thread::~Guardian_thread()
+Guardian::~Guardian()
 {
   /* delay guardian destruction to the moment when no one needs it */
   pthread_mutex_lock(&LOCK_guardian);
@@ -95,7 +95,7 @@ Guardian_thread::~Guardian_thread()
 }
 
 
-void Guardian_thread::request_shutdown()
+void Guardian::request_shutdown()
 {
   pthread_mutex_lock(&LOCK_guardian);
   /* stop instances or just clean up Guardian repository */
@@ -105,7 +105,7 @@ void Guardian_thread::request_shutdown()
 }
 
 
-void Guardian_thread::process_instance(Instance *instance,
+void Guardian::process_instance(Instance *instance,
                                        GUARD_NODE *current_node,
                                        LIST **guarded_instances,
                                        LIST *node)
@@ -244,7 +244,7 @@ void Guardian_thread::process_instance(Instance *instance,
     is fine go and sleep for some time.
 */
 
-void Guardian_thread::run()
+void Guardian::run()
 {
   Instance *instance;
   LIST *node;
@@ -292,7 +292,7 @@ void Guardian_thread::run()
 }
 
 
-int Guardian_thread::is_stopped()
+int Guardian::is_stopped()
 {
   int var;
   pthread_mutex_lock(&LOCK_guardian);
@@ -307,10 +307,10 @@ int Guardian_thread::is_stopped()
   add all of the instances, which don't have 'nonguarded' option specified.
 
   SYNOPSYS
-    Guardian_thread::init()
+    Guardian::init()
 
   NOTE: The operation should be invoked with the following locks acquired:
-    - Guardian_thread;
+    - Guardian;
     - Instance_map;
 
   RETURN
@@ -318,7 +318,7 @@ int Guardian_thread::is_stopped()
     1 - error occured
 */
 
-int Guardian_thread::init()
+int Guardian::init()
 {
   Instance *instance;
   Instance_map::Iterator iterator(instance_map);
@@ -360,7 +360,7 @@ int Guardian_thread::init()
     1 - error occured
 */
 
-int Guardian_thread::guard(Instance *instance, bool nolock)
+int Guardian::guard(Instance *instance, bool nolock)
 {
   LIST *node;
   GUARD_NODE *content;
@@ -397,7 +397,7 @@ int Guardian_thread::guard(Instance *instance, bool nolock)
   a piece of the MEM_ROOT).
 */
 
-int Guardian_thread::stop_guard(Instance *instance)
+int Guardian::stop_guard(Instance *instance)
 {
   LIST *node;
 
@@ -434,7 +434,7 @@ int Guardian_thread::stop_guard(Instance *instance)
     1 - error occured
 */
 
-int Guardian_thread::stop_instances()
+int Guardian::stop_instances()
 {
   LIST *node;
   node= guarded_instances;
@@ -462,19 +462,19 @@ int Guardian_thread::stop_instances()
 }
 
 
-void Guardian_thread::lock()
+void Guardian::lock()
 {
   pthread_mutex_lock(&LOCK_guardian);
 }
 
 
-void Guardian_thread::unlock()
+void Guardian::unlock()
 {
   pthread_mutex_unlock(&LOCK_guardian);
 }
 
 
-LIST *Guardian_thread::find_instance_node(Instance *instance)
+LIST *Guardian::find_instance_node(Instance *instance)
 {
   LIST *node= guarded_instances;
 
@@ -494,7 +494,7 @@ LIST *Guardian_thread::find_instance_node(Instance *instance)
 }
 
 
-bool Guardian_thread::is_active(Instance *instance)
+bool Guardian::is_active(Instance *instance)
 {
   bool guarded;
 

server-tools/instance-manager/guardian.h

@@ -31,15 +31,15 @@ class Instance_map;
 class Thread_registry;
 struct GUARD_NODE;
 
-pthread_handler_t guardian(void *arg);
+pthread_handler_t guardian_thread_func(void *arg);
 
-struct Guardian_thread_args
+struct Guardian_args
 {
   Thread_registry &thread_registry;
   Instance_map *instance_map;
   int monitoring_interval;
 
-  Guardian_thread_args(Thread_registry &thread_registry_arg,
+  Guardian_args(Thread_registry &thread_registry_arg,
                        Instance_map *instance_map_arg,
                        uint monitoring_interval_arg) :
     thread_registry(thread_registry_arg),
@@ -54,7 +54,7 @@ struct Guardian_thread_args
   instances.
 */
 
-class Guardian_thread: public Guardian_thread_args
+class Guardian: public Guardian_args
 {
 public:
   /* states of an instance */
@@ -82,10 +82,10 @@ public:
   /* Return client state name. */
   static const char *get_instance_state_name(enum_instance_state state);
 
-  Guardian_thread(Thread_registry &thread_registry_arg,
+  Guardian(Thread_registry &thread_registry_arg,
                   Instance_map *instance_map_arg,
                   uint monitoring_interval_arg);
-  ~Guardian_thread();
+  ~Guardian();
   /* Main funtion of the thread */
   void run();
   /* Initialize or refresh the list of guarded instances */
@@ -140,8 +140,8 @@ private:
 };
 
 
-inline Guardian_thread::enum_instance_state
-Guardian_thread::get_instance_state(LIST *instance_node)
+inline Guardian::enum_instance_state
+Guardian::get_instance_state(LIST *instance_node)
 {
   return ((GUARD_NODE *) instance_node->data)->state;
 }

server-tools/instance-manager/instance_map.cc

@@ -276,7 +276,7 @@ void Instance_map::unlock()
     FLUSH INSTANCES without prior stop of all running instances.
 
   NOTE: The operation should be invoked with the following locks acquired:
-    - Guardian_thread;
+    - Guardian;
     - Instance_map;
 */
 
@@ -537,7 +537,7 @@ const char *Instance_map::get_instance_state_name(Instance *instance)
   {
     /* The instance is managed by Guardian: we can report precise state. */
 
-    return Guardian_thread::get_instance_state_name(
+    return Guardian::get_instance_state_name(
       guardian->get_instance_state(instance_node));
   }
 

server-tools/instance-manager/instance_map.h

@@ -25,7 +25,7 @@
 #pragma interface
 #endif
 
-class Guardian_thread;
+class Guardian;
 class Instance;
 class Named_value_arr;
 class Thread_registry;
@@ -115,13 +115,13 @@ public:
     MT-NOTE: the options must be called under acquired locks of the following
     objects:
       - Instance_map;
-      - Guardian_thread;
+      - Guardian;
   */
   const char *get_instance_state_name(Instance *instance);
 
 public:
   const char *mysqld_path;
-  Guardian_thread *guardian;
+  Guardian *guardian;
 
 private:
   /* loads options from config files */

server-tools/instance-manager/manager.cc

@@ -37,33 +37,6 @@
 #include "user_map.h"
 
 
-int create_pid_file(const char *pid_file_name, int pid)
-{
-  FILE *pid_file;
-
-  if (!(pid_file= my_fopen(pid_file_name, O_WRONLY | O_CREAT | O_BINARY,
-                           MYF(0))))
-  {
-    log_error("Error: can not create pid file '%s': %s (errno: %d)",
-              (const char *) pid_file_name,
-              (const char *) strerror(errno),
-              (int) errno);
-    return 1;
-  }
-
-  if (fprintf(pid_file, "%d\n", (int) pid) <= 0)
-  {
-    log_error("Error: can not write to pid file '%s': %s (errno: %d)",
-              (const char *) pid_file_name,
-              (const char *) strerror(errno),
-              (int) errno);
-    return 1;
-  }
-
-  my_fclose(pid_file, MYF(0));
-
-  return 0;
-}
 
 #ifndef __WIN__
 void set_signals(sigset_t *mask)
@@ -120,7 +93,7 @@ int my_sigwait(const sigset_t *set, int *sig)
 #endif
 
 
-void stop_all(Guardian_thread *guardian, Thread_registry *registry)
+void stop_all(Guardian *guardian, Thread_registry *registry)
 {
   /*
     Let guardian thread know that it should break it's processing cycle,
@@ -133,6 +106,13 @@ void stop_all(Guardian_thread *guardian, Thread_registry *registry)
   registry->deliver_shutdown();
 }
 
+/**********************************************************************
+  Manager implementation
+***********************************************************************/
+
+Guardian *Manager::p_guardian;
+Instance_map *Manager::p_instance_map;
+
 /*
   manager - entry point to the main instance manager process: start
   listener thread, write pid file and enter into signal handling.
@@ -142,9 +122,10 @@ void stop_all(Guardian_thread *guardian, Thread_registry *registry)
   TODO: how about returning error status.
 */
 
-void manager()
+int Manager::main()
 {
   int err_code;
+  int rc= 1;
   const char *err_msg;
   bool shutdown_complete= FALSE;
 
@@ -158,21 +139,21 @@ void manager()
   User_map user_map;
   Instance_map instance_map(Options::Main::default_mysqld_path,
                             thread_registry);
-  Guardian_thread guardian_thread(thread_registry,
-                                  &instance_map,
-                                  Options::Main::monitoring_interval);
+  Guardian guardian(thread_registry, &instance_map,
+                    Options::Main::monitoring_interval);
 
   Listener_thread_args listener_args(thread_registry, user_map, instance_map);
 
   manager_pid= getpid();
-  instance_map.guardian= &guardian_thread;
+  p_instance_map= &instance_map;
+  p_guardian= instance_map.guardian= &guardian;
 
   /* Initialize instance map. */
 
   if (instance_map.init())
   {
     log_error("Error: can not initialize instance list: out of memory.");
-    return;
+    return 1;
   }
 
   /* Initialize user map and load password file. */
@@ -180,7 +161,7 @@ void manager()
   if (user_map.init())
   {
     log_error("Error: can not initialize user list: out of memory.");
-    return;
+    return 1;
   }
 
   if ((err_code= user_map.load(Options::Main::password_file_name, &err_msg)))
@@ -199,7 +180,7 @@ void manager()
     else
     {
       log_error("Error: %s.", (const char *) err_msg);
-      return;
+      return 1;
     }
   }
 
@@ -210,7 +191,7 @@ void manager()
            (int) manager_pid);
 
   if (create_pid_file(Options::Main::pid_file_name, manager_pid))
-    return; /* necessary logging has been already done. */
+    return 1; /* necessary logging has been already done. */
 
   /*
     Initialize signals and alarm-infrastructure.
@@ -253,7 +234,7 @@ void manager()
     pthread_attr_init(&guardian_thd_attr);
     pthread_attr_setdetachstate(&guardian_thd_attr, PTHREAD_CREATE_DETACHED);
     rc= set_stacksize_n_create_thread(&guardian_thd_id, &guardian_thd_attr,
-                                      guardian, &guardian_thread);
+                                      guardian_thread_func, &guardian);
     pthread_attr_destroy(&guardian_thd_attr);
     if (rc)
     {
@@ -279,7 +260,7 @@ void manager()
       log_error("Cannot init instances repository. This might be caused by "
         "the wrong config file options. For instance, missing mysqld "
         "binary. Aborting.");
-      stop_all(&guardian_thread, &thread_registry);
+      stop_all(&guardian, &thread_registry);
       goto err;
     }
   }
@@ -298,7 +279,7 @@ void manager()
     if (rc)
     {
       log_error("manager(): set_stacksize_n_create_thread(listener) failed");
-      stop_all(&guardian_thread, &thread_registry);
+      stop_all(&guardian, &thread_registry);
       goto err;
     }
   }
@@ -307,7 +288,7 @@ void manager()
     After the list of guarded instances have been initialized,
     Guardian should start them.
   */
-  pthread_cond_signal(&guardian_thread.COND_guardian);
+  pthread_cond_signal(&guardian.COND_guardian);
 
   log_info("Main loop: started.");
 
@@ -319,7 +300,7 @@ void manager()
     if ((status= my_sigwait(&mask, &signo)) != 0)
     {
       log_error("sigwait() failed");
-      stop_all(&guardian_thread, &thread_registry);
+      stop_all(&guardian, &thread_registry);
       goto err;
     }
 
@@ -328,8 +309,8 @@ void manager()
         - we are waiting for SIGINT, SIGTERM -- signals that mean we should
           shutdown;
         - as shutdown signal is caught, we stop Guardian thread (by calling
-          Guardian_thread::request_shutdown());
-        - as Guardian_thread is stopped, it sends SIGTERM to this thread
+          Guardian::request_shutdown());
+        - as Guardian is stopped, it sends SIGTERM to this thread
           (by calling Thread_registry::request_shutdown()), so that the
           my_sigwait() above returns;
         - as we catch the second SIGTERM, we send signals to all threads
@@ -355,10 +336,10 @@ void manager()
     {
       log_info("Main loop: got shutdown signal.");
 
-      if (!guardian_thread.is_stopped())
+      if (!guardian.is_stopped())
       {
-        guardian_thread.request_shutdown();
-        pthread_cond_signal(&guardian_thread.COND_guardian);
+        guardian.request_shutdown();
+        pthread_cond_signal(&guardian.COND_guardian);
       }
       else
       {
@@ -370,6 +351,8 @@ void manager()
 
   log_info("Main loop: finished.");
 
+  rc= 0;
+
 err:
   /* delete the pid file */
   my_delete(Options::Main::pid_file_name, MYF(0));
@@ -379,4 +362,5 @@ err:
   end_thr_alarm(1);
   /* don't pthread_exit to kill all threads who did not shut down in time */
 #endif
+  return rc;
 }

server-tools/instance-manager/manager.h

@@ -16,8 +16,29 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
-void manager();
+#if defined(__GNUC__) && defined(USE_PRAGMA_INTERFACE)
+#pragma interface
+#endif
 
-int create_pid_file(const char *pid_file_name, int pid);
+class Guardian;
+class Instance_map;
+
+class Manager
+{
+public:
+  static int main();
+  /**
+    These methods return a non-zero value only for the duration
+    of main().
+  */
+  static Instance_map *get_instance_map() { return p_instance_map; }
+  static Guardian *get_guardian() { return p_guardian; }
+
+private:
+  static int manager_impl();
+private:
+  static Guardian *p_guardian;
+  static Instance_map *p_instance_map;
+};
 
 #endif // INCLUDES_MYSQL_INSTANCE_MANAGER_MANAGER_H

server-tools/instance-manager/mysql_connection.cc

@@ -315,7 +315,7 @@ int Mysql_connection_thread::do_command()
     packet= (char*) net.read_pos;
     enum enum_server_command command= (enum enum_server_command)
                                       (uchar) *packet;
-    log_info("connection %lu: packet_length=%lu, command=%d",
+    log_info("connection %d: packet_length=%d, command=%d",
              (int) connection_id, (int) packet_length, (int) command);
     return dispatch_command(command, packet + 1, packet_length - 1);
   }
@@ -336,10 +336,10 @@ int Mysql_connection_thread::dispatch_command(enum enum_server_command command,
     break;
   case COM_QUERY:
   {
-    log_info("query for connection %lu : ----\n%s\n-------------------------",
+    log_info("query for connection %d : ----\n%s\n-------------------------",
 	     (int) connection_id,
              (const char *) packet);
-    if (Command *command= parse_command(&instance_map, packet))
+    if (Command *command= parse_command(packet))
     {
       int res= 0;
       log_info("query for connection %lu successfully parsed",

server-tools/instance-manager/mysqlmanager.cc

@@ -31,6 +31,7 @@
 #include "log.h"
 #include "manager.h"
 #include "options.h"
+#include "priv.h"
 #include "user_management_commands.h"
 
 #ifdef __WIN__
@@ -117,7 +118,7 @@ int main(int argc, char *argv[])
     angel();
   }
 
-  manager();
+  (void) Manager::main(); /* ignore the return value for now */
 
 #else
 
@@ -131,7 +132,7 @@ int main(int argc, char *argv[])
   }
   else
   {
-    manager();
+    (void) Manager::main(); /* ignore the return value for now */
   }
 
 #endif
@@ -384,8 +385,8 @@ spawn:
     }
     /*
       mysqlmanager successfully exited, let's silently evaporate
-      If we return to main we fall into the manager() function, so let's
-      simply exit().
+      If we return to main we will fall into the manager functionality,
+      so let's simply exit().
     */
     exit(0);
   }

server-tools/instance-manager/parse.cc

@@ -269,7 +269,7 @@ void skip_spaces(const char **text)
 }
 
 
-Command *parse_command(Instance_map *map, const char *text)
+Command *parse_command(const char *text)
 {
   uint word_len;
   LEX_STRING instance_name;
@@ -294,7 +294,7 @@ Command *parse_command(Instance_map *map, const char *text)
 
     if (tok1 == TOK_CREATE)
     {
-      Create_instance *cmd= new Create_instance(map, &instance_name);
+      Create_instance *cmd= new Create_instance(&instance_name);
 
       if (!cmd)
         return NULL; /* Report ER_OUT_OF_RESOURCES. */
@@ -317,16 +317,16 @@ Command *parse_command(Instance_map *map, const char *text)
 
     switch (tok1) {
     case TOK_START:
-      command= new Start_instance(map, &instance_name);
+      command= new Start_instance(&instance_name);
       break;
     case TOK_STOP:
-      command= new Stop_instance(map, &instance_name);
+      command= new Stop_instance(&instance_name);
       break;
     case TOK_CREATE:
       ; /* command already initialized. */
       break;
     case TOK_DROP:
-      command= new Drop_instance(map, &instance_name);
+      command= new Drop_instance(&instance_name);
       break;
     default: /* this is impossible, but nevertheless... */
       DBUG_ASSERT(0);
@@ -340,7 +340,7 @@ Command *parse_command(Instance_map *map, const char *text)
     if (word_len)
       goto syntax_error;
 
-    command= new Flush_instances(map);
+    command= new Flush_instances();
     break;
   case TOK_UNSET:
   case TOK_SET:
@@ -348,9 +348,9 @@ Command *parse_command(Instance_map *map, const char *text)
       Abstract_option_cmd *cmd;
 
       if (tok1 == TOK_SET)
-        cmd= new Set_option(map);
+        cmd= new Set_option();
       else
-        cmd= new Unset_option(map);
+        cmd= new Unset_option();
 
       if (!cmd)
         return NULL; /* Report ER_OUT_OF_RESOURCES. */
@@ -371,7 +371,7 @@ Command *parse_command(Instance_map *map, const char *text)
       get_word(&text, &word_len, NONSPACE);
       if (word_len)
         goto syntax_error;
-      command= new Show_instances(map);
+      command= new Show_instances();
       break;
     case TOK_INSTANCE:
       switch (Token tok2= shift_token(&text, &word_len)) {
@@ -385,9 +385,9 @@ Command *parse_command(Instance_map *map, const char *text)
         if (word_len)
           goto syntax_error;
         if (tok2 == TOK_STATUS)
-          command= new Show_instance_status(map, &instance_name);
+          command= new Show_instance_status(&instance_name);
         else
-          command= new Show_instance_options(map, &instance_name);
+          command= new Show_instance_options(&instance_name);
         break;
       default:
         goto syntax_error;
@@ -414,7 +414,7 @@ Command *parse_command(Instance_map *map, const char *text)
             /* check that this is the end of the command */
             if (word_len)
               goto syntax_error;
-            command= new Show_instance_log_files(map, &instance_name);
+            command= new Show_instance_log_files(&instance_name);
             break;
           case TOK_ERROR:
           case TOK_GENERAL:
@@ -484,7 +484,7 @@ Command *parse_command(Instance_map *map, const char *text)
                 goto syntax_error;
             }
 
-            command= new Show_instance_log(map, &instance_name,
+            command= new Show_instance_log(&instance_name,
                                            log_type, log_size, log_offset);
           break;
           default:
@@ -504,5 +504,8 @@ Command *parse_command(Instance_map *map, const char *text)
 syntax_error:
     command= new Syntax_error();
   }
+
+  DBUG_ASSERT(command);
+
   return command;
 }

server-tools/instance-manager/parse.h

@@ -21,7 +21,6 @@
 #include <m_string.h>
 
 class Command;
-class Instance_map;
 
 enum Log_type
 {
@@ -30,7 +29,7 @@ enum Log_type
   IM_LOG_SLOW
 };
 
-Command *parse_command(Instance_map *map, const char *text);
+Command *parse_command(const char *text);
 
 bool parse_option_value(const char *text, uint *text_len, char **value);
 

server-tools/instance-manager/priv.cc

@@ -18,6 +18,9 @@
 
 #include <my_global.h>
 #include <mysql_com.h>
+#include <my_sys.h>
+
+#include "log.h"
 
 #if defined(__ia64__) || defined(__ia64)
 /*
@@ -90,3 +93,32 @@ int set_stacksize_n_create_thread(pthread_t  *thread, pthread_attr_t *attr,
     rc= pthread_create(thread, attr, start_routine, arg);
   return rc;
 }
+
+
+int create_pid_file(const char *pid_file_name, int pid)
+{
+  FILE *pid_file;
+
+  if (!(pid_file= my_fopen(pid_file_name, O_WRONLY | O_CREAT | O_BINARY,
+                           MYF(0))))
+  {
+    log_error("Error: can not create pid file '%s': %s (errno: %d)",
+              (const char *) pid_file_name,
+              (const char *) strerror(errno),
+              (int) errno);
+    return 1;
+  }
+
+  if (fprintf(pid_file, "%d\n", (int) pid) <= 0)
+  {
+    log_error("Error: can not write to pid file '%s': %s (errno: %d)",
+              (const char *) pid_file_name,
+              (const char *) strerror(errno),
+              (int) errno);
+    return 1;
+  }
+
+  my_fclose(pid_file, MYF(0));
+
+  return 0;
+}

server-tools/instance-manager/priv.h

@@ -109,4 +109,6 @@ extern unsigned long open_files_limit;
 int set_stacksize_n_create_thread(pthread_t  *thread, pthread_attr_t *attr,
                                   void *(*start_routine)(void *), void *arg);
 
+int create_pid_file(const char *pid_file_name, int pid);
+
 #endif // INCLUDES_MYSQL_INSTANCE_MANAGER_PRIV_H

server-tools/instance-manager/thread_registry.h

@@ -101,6 +101,7 @@ public:
                  pthread_mutex_t *mutex);
   int cond_timedwait(Thread_info *info, pthread_cond_t *cond,
                      pthread_mutex_t *mutex, struct timespec *wait_time);
+
 private:
   void interrupt_threads();
   void wait_for_threads_to_unregister();
@@ -111,6 +112,10 @@ private:
   pthread_mutex_t LOCK_thread_registry;
   pthread_cond_t COND_thread_registry_is_empty;
   pthread_t sigwait_thread_pid;
+
+private:
+  Thread_registry(const Thread_registry &);
+  Thread_registry &operator =(const Thread_registry &);
 };
 
 

server-tools/instance-manager/user_map.cc

@@ -42,7 +42,7 @@ int User::init(const char *line)
     if (name_end == 0 || name_end[1] != ':')
     {
       log_info("Error: invalid format (unmatched quote) of user line (%s).",
-                (const char *) line);
+               (const char *) line);
       return 1;
     }
     password= name_end + 2;
@@ -54,7 +54,7 @@ int User::init(const char *line)
     if (name_end == 0)
     {
       log_info("Error: invalid format (no delimiter) of user line (%s).",
-                (const char *) line);
+               (const char *) line);
       return 1;
     }
     password= name_end + 1;
@@ -64,17 +64,18 @@ int User::init(const char *line)
   if (user_length > USERNAME_LENGTH)
   {
     log_info("Error: user name is too long (%d). Max length: %d. "
-              "User line: '%s'.",
-              (int) user_length,
-              (int) USERNAME_LENGTH,
-              (const char *) line);
+             "User line: '%s'.",
+             (int) user_length,
+             (int) USERNAME_LENGTH,
+             (const char *) line);
     return 1;
   }
 
   password_length= strlen(password);
   if (password_length > SCRAMBLED_PASSWORD_CHAR_LENGTH)
   {
-    log_info("Error: password is too long (%d). Max length: %d. User line: '%s'.",
+    log_info("Error: password is too long (%d). Max length: %d."
+             "User line: '%s'.",
              (int) password_length,
              (int) SCRAMBLED_PASSWORD_CHAR_LENGTH,
              line);