Port cleanups, trivial refactoring and code rearrangements from

Alik's patch for BUG#22306: STOP INSTANCE can not be applied for 
instances in Crashed, Failed and Abandoned" to ease review process.
Evaluate global variable linuxthreads before starting threads to avoid
a race.

server-tools/instance-manager/buffer.cc

@@ -27,7 +27,7 @@ const uint Buffer::MAX_BUFFER_SIZE= 16777216;
 /*
   Puts the given string to the buffer.
 
-  SYNOPSYS
+  SYNOPSIS
     append()
     position          start position in the buffer
     string            string to be put in the buffer
@@ -59,7 +59,7 @@ int Buffer::append(uint position, const char *string, uint len_arg)
   Checks whether the current buffer size is ok to put a string of the length
   "len_arg" starting from "position" and reallocs it if no.
 
-  SYNOPSYS
+  SYNOPSIS
     reserve()
     position          the number starting byte on the buffer to store a buffer
     len_arg           the length of the string.

server-tools/instance-manager/command.h

@@ -43,7 +43,7 @@ public:
   /*
     This operation incapsulates behaviour of the command.
 
-    SYNOPSYS
+    SYNOPSIS
       net             The network connection to the client.
       connection_id   Client connection ID
 

server-tools/instance-manager/commands.cc

@@ -49,7 +49,7 @@ static const int modify_defaults_to_im_error[]= { 0, ER_OUT_OF_RESOURCES,
 /*
   Add a string to a buffer.
 
-  SYNOPSYS
+  SYNOPSIS
     put_to_buff()
     buff              buffer to add the string
     str               string to add
@@ -590,7 +590,7 @@ Create_instance::Create_instance(const LEX_STRING *instance_name_arg)
 /*
   This operation initializes Create_instance object.
 
-  SYNOPSYS
+  SYNOPSIS
     text            [IN/OUT] a pointer to the text containing instance options.
 
   RETURN
@@ -607,7 +607,7 @@ bool Create_instance::init(const char **text)
 /*
   This operation parses CREATE INSTANCE options.
 
-  SYNOPSYS
+  SYNOPSIS
     text            [IN/OUT] a pointer to the text containing instance options.
 
   RETURN
@@ -1255,7 +1255,7 @@ bool Abstract_option_cmd::init(const char **text)
   Correct the option file. The "skip" option is used to remove the found
   option.
 
-  SYNOPSYS
+  SYNOPSIS
   Abstract_option_cmd::correct_file()
     skip     Skip the option, being searched while writing the result file.
              That is, to delete it.
@@ -1395,7 +1395,7 @@ int Abstract_option_cmd::execute_impl(st_net *net, ulong connection_id)
 /*
   This operation parses SET options.
 
-  SYNOPSYS
+  SYNOPSIS
     text            [IN/OUT] a pointer to the text containing options.
 
   RETURN
@@ -1569,7 +1569,7 @@ int Set_option::process_option(Instance *instance, Named_value *option)
 /*
   This operation parses UNSET options.
 
-  SYNOPSYS
+  SYNOPSIS
     text            [IN/OUT] a pointer to the text containing options.
 
   RETURN

server-tools/instance-manager/commands.h

@@ -32,15 +32,11 @@
 
 /*
   Print all instances of this instance manager.
-  Grammar: SHOW ISTANCES
+  Grammar: SHOW INSTANCES
 */
 
-class Show_instances : public Command
+class Show_instances: public Command
 {
-public:
-  Show_instances()
-  { }
-
 public:
   int execute(st_net *net, ulong connection_id);
 
@@ -57,10 +53,6 @@ private:
 
 class Flush_instances : public Command
 {
-public:
-  Flush_instances()
-  { }
-
 public:
   int execute(st_net *net, ulong connection_id);
 };
@@ -103,7 +95,7 @@ private:
 
 /*
   Print status of an instance.
-  Grammar: SHOW ISTANCE STATUS <instance_name>
+  Grammar: SHOW INSTANCE STATUS <instance_name>
 */
 
 class Show_instance_status : public Abstract_instance_cmd
@@ -319,10 +311,6 @@ private:
 
 class Set_option : public Abstract_option_cmd
 {
-public:
-  Set_option()
-  { }
-
 protected:
   virtual bool parse_args(const char **text);
   virtual int process_option(Instance *instance, Named_value *option);
@@ -336,10 +324,6 @@ protected:
 
 class Unset_option: public Abstract_option_cmd
 {
-public:
-  Unset_option()
-  { }
-
 protected:
   virtual bool parse_args(const char **text);
   virtual int process_option(Instance *instance, Named_value *option);
@@ -357,10 +341,6 @@ protected:
 
 class Syntax_error : public Command
 {
-public:
-  Syntax_error()
-  { }
-
 public:
   int execute(st_net *net, ulong connection_id);
 };

server-tools/instance-manager/guardian.cc

@@ -91,7 +91,7 @@ Guardian::~Guardian()
 void Guardian::request_shutdown()
 {
   pthread_mutex_lock(&LOCK_guardian);
-  /* stop instances or just clean up Guardian repository */
+  /* STOP Instances or just clean up Guardian repository */
   stop_instances();
   shutdown_requested= TRUE;
   pthread_mutex_unlock(&LOCK_guardian);
@@ -110,23 +110,14 @@ void Guardian::process_instance(Instance *instance,
 
   if (current_node->state == STOPPING)
   {
-    /* this branch is executed during shutdown */
-    if (instance->options.shutdown_delay)
-    {
-      /*
-        NOTE: it is important to check shutdown_delay here, but use
-        shutdown_delay_val. The idea is that if the option is unset,
-        shutdown_delay will be NULL, but shutdown_delay_val will not be reset.
-      */
-      waitchild= instance->options.shutdown_delay_val;
-    }
+    waitchild= instance->options.get_shutdown_delay();
 
     /* this returns TRUE if and only if an instance was stopped for sure */
     if (instance->is_crashed())
       *guarded_instances= list_delete(*guarded_instances, node);
     else if ( (uint) (current_time - current_node->last_checked) > waitchild)
     {
-      instance->kill_instance(SIGKILL);
+      instance->kill_mysqld(SIGKILL);
       /*
         Later we do node= node->next. This is ok, as we are only removing
         the node from the list. The pointer to the next one is still valid.
@@ -137,20 +128,20 @@ void Guardian::process_instance(Instance *instance,
     return;
   }
 
-  if (instance->is_running())
+  if (instance->is_mysqld_running())
   {
     /* The instance can be contacted  on it's port */
 
     /* If STARTING also check that pidfile has been created */
     if (current_node->state == STARTING &&
-        current_node->instance->options.get_pid() == 0)
+        current_node->instance->options.load_pid() == 0)
     {
       /* Pid file not created yet, don't go to STARTED state yet  */
     }
     else if (current_node->state != STARTED)
     {
       /* clear status fields */
-      log_info("guardian: instance '%s' is running, set state to STARTED.",
+      log_info("Guardian: '%s' is running, set state to STARTED.",
                (const char *) instance->options.instance_name.str);
       current_node->restart_counter= 0;
       current_node->crash_moment= 0;
@@ -161,7 +152,7 @@ void Guardian::process_instance(Instance *instance,
   {
     switch (current_node->state) {
     case NOT_STARTED:
-      log_info("guardian: starting instance '%s'...",
+      log_info("Guardian: starting '%s'...",
                (const char *) instance->options.instance_name.str);
 
       /* NOTE, set state to STARTING _before_ start() is called */
@@ -186,7 +177,7 @@ void Guardian::process_instance(Instance *instance,
         if (instance->is_crashed())
         {
           instance->start();
-          log_info("guardian: starting instance '%s'...",
+          log_info("Guardian: starting '%s'...",
                    (const char *) instance->options.instance_name.str);
         }
       }
@@ -204,14 +195,15 @@ void Guardian::process_instance(Instance *instance,
             instance->start();
             current_node->last_checked= current_time;
             current_node->restart_counter++;
-            log_info("guardian: restarting instance '%s'...",
+            log_info("Guardian: restarting '%s'...",
                      (const char *) instance->options.instance_name.str);
           }
         }
         else
         {
-          log_info("guardian: cannot start instance %s. Abandoning attempts "
-                   "to (re)start it", instance->options.instance_name.str);
+          log_info("Guardian: can not start '%s'. "
+                   "Abandoning attempts to (re)start it",
+                   (const char *) instance->options.instance_name.str);
           current_node->state= CRASHED_AND_ABANDONED;
         }
       }
@@ -226,13 +218,12 @@ void Guardian::process_instance(Instance *instance,
 
 
 /*
-  Run guardian thread
+  Main function of Guardian thread.
 
   SYNOPSIS
     run()
 
   DESCRIPTION
-
     Check for all guarded instances and restart them if needed. If everything
     is fine go and sleep for some time.
 */
@@ -436,7 +427,7 @@ int Guardian::stop_instances()
       If instance is running or was running (and now probably hanging),
       request stop.
     */
-    if (current_node->instance->is_running() ||
+    if (current_node->instance->is_mysqld_running() ||
         (current_node->state == STARTED))
     {
       current_node->state= STOPPING;
@@ -446,7 +437,7 @@ int Guardian::stop_instances()
       /* otherwise remove it from the list */
       guarded_instances= list_delete(guarded_instances, node);
     /* But try to kill it anyway. Just in case */
-    current_node->instance->kill_instance(SIGTERM);
+    current_node->instance->kill_mysqld(SIGTERM);
     node= node->next;
   }
   return 0;
@@ -499,5 +490,5 @@ bool Guardian::is_active(Instance *instance)
   if (guarded)
     return true;
 
-  return instance->is_running();
+  return instance->is_mysqld_running();
 }

server-tools/instance-manager/instance.h

@@ -88,21 +88,19 @@ public:
   static bool is_mysqld_compatible_name(const LEX_STRING *name);
 
 public:
-  Instance(Thread_registry &thread_registry_arg);
+  Instance();
 
   ~Instance();
-  int init(const LEX_STRING *name_arg);
-  int complete_initialization(Instance_map *instance_map_arg,
-                              const char *mysqld_path);
+  bool init(const LEX_STRING *name_arg);
+  bool complete_initialization();
 
-  bool is_running();
+  bool is_mysqld_running();
   int start();
   int stop();
   /* send a signal to the instance */
-  void kill_instance(int signo);
+  void kill_mysqld(int signo);
   bool is_crashed();
   void set_crash_flag_n_wake_all();
-  Instance_map *get_map();
 
   /*
     The operation is intended to check if the instance is mysqld-compatible
@@ -121,7 +119,6 @@ public:
 public:
   enum { DEFAULT_SHUTDOWN_DELAY= 35 };
   Instance_options options;
-  Thread_registry &thread_registry;
 
 private:
   /* This attributes is a flag, specifies if the instance has been crashed. */
@@ -155,7 +152,6 @@ private:
     stop in Instance::stop()
   */
   pthread_cond_t COND_instance_stopped;
-  Instance_map *instance_map;
 
   void  remove_pid();
 };

server-tools/instance-manager/instance_map.cc

@@ -63,7 +63,7 @@ static void delete_instance(void *u)
 /*
   The option handler to pass to the process_default_option_files finction.
 
-  SYNOPSYS
+  SYNOPSIS
     process_option()
     ctx               Handler context. Here it is an instance_map structure.
     group_name        The name of the group the option belongs to.
@@ -169,7 +169,7 @@ int Instance_map::process_one_option(const LEX_STRING *group,
   if (!(instance= (Instance *) hash_search(&hash, (byte *) group->str,
                                            group->length)))
   {
-    if (!(instance= new Instance(thread_registry)))
+    if (!(instance= new Instance()))
       return 1;
 
     if (instance->init(group) || add_instance(instance))
@@ -213,16 +213,13 @@ int Instance_map::process_one_option(const LEX_STRING *group,
 }
 
 
-Instance_map::Instance_map(const char *default_mysqld_path_arg,
-                           Thread_registry &thread_registry_arg):
-  mysqld_path(default_mysqld_path_arg),
-  thread_registry(thread_registry_arg)
+Instance_map::Instance_map()
 {
   pthread_mutex_init(&LOCK_instance_map, 0);
 }
 
 
-int Instance_map::init()
+bool Instance_map::init()
 {
   return hash_init(&hash, default_charset_info, START_HASH_SIZE, 0, 0,
                    get_instance_key, delete_instance, 0);
@@ -310,7 +307,7 @@ bool Instance_map::is_there_active_instance()
   while ((instance= iterator.next()))
   {
     if (guardian->find_instance_node(instance) != NULL ||
-        instance->is_running())
+        instance->is_mysqld_running())
     {
       return TRUE;
     }
@@ -335,18 +332,18 @@ int Instance_map::remove_instance(Instance *instance)
 int Instance_map::create_instance(const LEX_STRING *instance_name,
                                   const Named_value_arr *options)
 {
-  Instance *instance= new Instance(thread_registry);
+  Instance *instance= new Instance();
 
   if (!instance)
   {
-    log_error("Error: can not initialize (name: '%s').",
+    log_error("Error: can not allocate instance (name: '%s').",
               (const char *) instance_name->str);
     return ER_OUT_OF_RESOURCES;
   }
 
   if (instance->init(instance_name))
   {
-    log_error("Error: can not initialize (name: '%s').",
+    log_error("Error: can not initialize instance (name: '%s').",
               (const char *) instance_name->str);
     delete instance;
     return ER_OUT_OF_RESOURCES;
@@ -374,7 +371,7 @@ int Instance_map::create_instance(const LEX_STRING *instance_name,
     log_info("Warning: instance name '%s' is mysqld-compatible.",
              (const char *) instance_name->str);
 
-  if (instance->complete_initialization(this, mysqld_path))
+  if (instance->complete_initialization())
   {
     log_error("Error: can not complete initialization of instance (name: '%s').",
               (const char *) instance_name->str);
@@ -411,7 +408,7 @@ bool Instance_map::complete_initialization()
   {
     Instance *instance= (Instance *) hash_element(&hash, i);
 
-    if (instance->complete_initialization(this, mysqld_path))
+    if (instance->complete_initialization())
       return TRUE;
   }
 
@@ -543,14 +540,14 @@ const char *Instance_map::get_instance_state_name(Instance *instance)
 
   /* The instance is not managed by Guardian: we can report status only.  */
 
-  return instance->is_running() ? "online" : "offline";
+  return instance->is_mysqld_running() ? "online" : "offline";
 }
 
 
 /*
   Create a new configuration section for mysqld-instance in the config file.
 
-  SYNOPSYS
+  SYNOPSIS
     create_instance_in_file()
     instance_name       mysqld-instance name
     options             options for the new mysqld-instance

server-tools/instance-manager/instance_map.h

@@ -75,7 +75,7 @@ public:
   void lock();
   void unlock();
 
-  int init();
+  bool init();
 
   /*
     Process a given option and assign it to appropricate instance. This is
@@ -105,8 +105,7 @@ public:
   int create_instance(const LEX_STRING *instance_name,
                       const Named_value_arr *options);
 
-  Instance_map(const char *default_mysqld_path_arg,
-               Thread_registry &thread_registry_arg);
+  Instance_map();
   ~Instance_map();
 
   /*
@@ -132,8 +131,6 @@ private:
   enum { START_HASH_SIZE = 16 };
   pthread_mutex_t LOCK_instance_map;
   HASH hash;
-
-  Thread_registry &thread_registry;
 };
 
 #endif /* INCLUDES_MYSQL_INSTANCE_MANAGER_INSTANCE_MAP_H */

server-tools/instance-manager/instance_options.cc

@@ -29,6 +29,7 @@
 #include "buffer.h"
 #include "instance.h"
 #include "log.h"
+#include "options.h"
 #include "parse_output.h"
 #include "priv.h"
 
@@ -82,8 +83,12 @@ bool Instance_options::is_option_im_specific(const char *option_name)
 
 Instance_options::Instance_options()
   :mysqld_version(NULL), mysqld_socket(NULL), mysqld_datadir(NULL),
-  mysqld_pid_file(NULL), mysqld_port(NULL), mysqld_port_val(0),
-  nonguarded(NULL), shutdown_delay(NULL), shutdown_delay_val(0),
+  mysqld_pid_file(NULL), 
+  nonguarded(NULL),
+  mysqld_port(NULL), 
+  mysqld_port_val(0),
+  shutdown_delay(NULL),
+  shutdown_delay_val(0),
   filled_default_options(0)
 {
   mysqld_path.str= NULL;
@@ -99,7 +104,7 @@ Instance_options::Instance_options()
 /*
   Get compiled-in value of default_option
 
-  SYNOPSYS
+  SYNOPSIS
     get_default_option()
     result            buffer to put found value
     result_len        buffer size
@@ -139,7 +144,7 @@ err:
 /*
   Fill mysqld_version option (used at initialization stage)
 
-  SYNOPSYS
+  SYNOPSIS
     fill_instance_version()
 
   DESCRIPTION
@@ -182,7 +187,7 @@ int Instance_options::fill_instance_version()
 err:
   if (rc)
     log_error("fill_instance_version: Failed to get version of '%s'",
-              mysqld_path.str);
+              (const char *) mysqld_path.str);
   return rc;
 }
 
@@ -190,7 +195,7 @@ err:
 /*
   Fill mysqld_real_path
 
-  SYNOPSYS
+  SYNOPSIS
     fill_mysqld_real_path()
 
   DESCRIPTION
@@ -242,7 +247,7 @@ err:
 /*
   Fill various log options
 
-  SYNOPSYS
+  SYNOPSIS
     fill_log_options()
 
   DESCRIPTION
@@ -355,7 +360,7 @@ err:
 /*
   Get the full pid file name with path
 
-  SYNOPSYS
+  SYNOPSIS
     get_pid_filaname()
     result            buffer to sotre the pidfile value
 
@@ -396,7 +401,7 @@ int Instance_options::unlink_pidfile()
 }
 
 
-pid_t Instance_options::get_pid()
+pid_t Instance_options::load_pid()
 {
   FILE *pid_file_stream;
 
@@ -415,7 +420,7 @@ pid_t Instance_options::get_pid()
 }
 
 
-int Instance_options::complete_initialization(const char *default_path)
+bool Instance_options::complete_initialization()
 {
   int arg_idx;
   const char *tmp;
@@ -423,10 +428,14 @@ int Instance_options::complete_initialization(const char *default_path)
 
   if (!mysqld_path.str)
   {
-    // Need one extra byte, as convert_dirname() adds a slash at the end.
-    if (!(mysqld_path.str= alloc_root(&alloc, strlen(default_path) + 2)))
-      goto err;
-    strcpy(mysqld_path.str, default_path);
+    /* Need one extra byte, as convert_dirname() adds a slash at the end. */
+    mysqld_path.str= alloc_root(&alloc,
+                                strlen(Options::Main::default_mysqld_path) + 2);
+
+    if (! mysqld_path.str)
+      return TRUE;
+
+    strcpy(mysqld_path.str, Options::Main::default_mysqld_path);
   }
 
   // it's safe to cast this to char* since this is a buffer we are allocating
@@ -442,7 +451,7 @@ int Instance_options::complete_initialization(const char *default_path)
     shutdown_delay_val= atoi(shutdown_delay);
 
   if (!(tmp= strdup_root(&alloc, "--no-defaults")))
-    goto err;
+    return TRUE;
 
   if (!mysqld_pid_file)
   {
@@ -477,21 +486,21 @@ int Instance_options::complete_initialization(const char *default_path)
   }
 
   if (get_pid_filename(pid_file_with_path))
-    goto err;
+    return TRUE;
 
   /* we need to reserve space for the final zero + possible default options */
   if (!(argv= (char**)
         alloc_root(&alloc, (get_num_options() + 1
                             + MAX_NUMBER_OF_DEFAULT_OPTIONS) * sizeof(char*))))
-    goto err;
+    return TRUE;
   filled_default_options= 0;
 
   /* the path must be first in the argv */
   if (add_to_argv(mysqld_path.str))
-    goto err;
+    return TRUE;
 
   if (add_to_argv(tmp))
-    goto err;
+    return TRUE;
 
   arg_idx= filled_default_options;
   for (int opt_idx= 0; opt_idx < get_num_options(); ++opt_idx)
@@ -514,12 +523,9 @@ int Instance_options::complete_initialization(const char *default_path)
   argv[arg_idx]= 0;
 
   if (fill_log_options() || fill_mysqld_real_path() || fill_instance_version())
-    goto err;
-
-  return 0;
+    return TRUE;
 
-err:
-  return 1;
+  return FALSE;
 }
 
 
@@ -636,26 +642,26 @@ void Instance_options::print_argv()
 
 /*
   We execute this function to initialize some options.
-  Return value: 0 - ok. 1 - unable to allocate memory.
+
+  RETURN
+    FALSE - ok
+    TRUE  - memory allocation error
 */
 
-int Instance_options::init(const LEX_STRING *instance_name_arg)
+bool Instance_options::init(const LEX_STRING *instance_name_arg)
 {
   instance_name.length= instance_name_arg->length;
 
   init_alloc_root(&alloc, MEM_ROOT_BLOCK_SIZE, 0);
 
   if (options.init())
-    goto err;
+    return TRUE;
 
   if (!(instance_name.str= strmake_root(&alloc, instance_name_arg->str,
                                         instance_name_arg->length)))
-    goto err;
-
-  return 0;
+    return TRUE;
 
-err:
-  return 1;
+  return FALSE;
 }
 
 
@@ -663,3 +669,29 @@ Instance_options::~Instance_options()
 {
   free_root(&alloc, MYF(0));
 }
+
+
+uint Instance_options::get_shutdown_delay() const
+{
+  static const uint DEFAULT_SHUTDOWN_DELAY= 35;
+
+  /*
+    NOTE: it is important to check shutdown_delay here, but use
+    shutdown_delay_val. The idea is that if the option is unset,
+    shutdown_delay will be NULL, but shutdown_delay_val will not be reset.
+  */
+
+  return shutdown_delay ? shutdown_delay_val : DEFAULT_SHUTDOWN_DELAY;
+}
+
+int Instance_options::get_mysqld_port() const
+{
+  /*
+    NOTE: it is important to check mysqld_port here, but use mysqld_port_val.
+    The idea is that if the option is unset, mysqld_port will be NULL, but
+    mysqld_port_val will not be reset.
+  */
+
+  return mysqld_port ? mysqld_port_val : 0;
+}
+

server-tools/instance-manager/instance_options.h

@@ -45,8 +45,9 @@ public:
 public:
   Instance_options();
   ~Instance_options();
+
   /* fills in argv */
-  int complete_initialization(const char *default_path);
+  bool complete_initialization();
 
   bool set_option(Named_value *option);
   void unset_option(const char *option_name);
@@ -55,12 +56,15 @@ public:
   inline Named_value get_option(int idx) const;
 
 public:
-  int init(const LEX_STRING *instance_name_arg);
-  pid_t get_pid();
+  bool init(const LEX_STRING *instance_name_arg);
+  pid_t load_pid();
   int get_pid_filename(char *result);
   int unlink_pidfile();
   void print_argv();
 
+  uint get_shutdown_delay() const;
+  int get_mysqld_port() const;
+
 public:
   /*
     We need this value to be greater or equal then FN_REFLEN found in
@@ -79,14 +83,10 @@ public:
   const char *mysqld_socket;
   const char *mysqld_datadir;
   const char *mysqld_pid_file;
-  const char *mysqld_port;
-  uint mysqld_port_val;
   LEX_STRING instance_name;
   LEX_STRING mysqld_path;
   LEX_STRING mysqld_real_path;
   const char *nonguarded;
-  const char *shutdown_delay;
-  uint shutdown_delay_val;
   /* log enums are defined in parse.h */
   char *logs[3];
 
@@ -102,6 +102,11 @@ private:
   int find_option(const char *option_name);
 
 private:
+  const char *mysqld_port;
+  uint mysqld_port_val;
+  const char *shutdown_delay;
+  uint shutdown_delay_val;
+
   uint filled_default_options;
   MEM_ROOT alloc;
 

server-tools/instance-manager/listener.cc

@@ -85,14 +85,7 @@ void Listener::run()
   log_info("Listener: started.");
 
 #ifndef __WIN__
-  /* we use this var to check whether we are running on LinuxThreads */
-  pid_t thread_pid;
-
-  thread_pid= getpid();
-
   struct sockaddr_un unix_socket_address;
-  /* set global variable */
-  linuxthreads= (thread_pid != manager_pid);
 #endif
 
   thread_registry->register_thread(&thread_info);
@@ -151,10 +144,12 @@ void Listener::run()
         {
           set_no_inherit(client_fd);
 
-          Vio *vio= vio_new(client_fd, socket_index == 0 ?
-                            VIO_TYPE_SOCKET : VIO_TYPE_TCPIP,
+          struct st_vio *vio=
+            vio_new(client_fd,
+                    socket_index == 0 ?  VIO_TYPE_SOCKET : VIO_TYPE_TCPIP,
                     socket_index == 0 ? 1 : 0);
-          if (vio != 0)
+
+          if (vio != NULL)
             handle_new_mysql_connection(vio);
           else
           {
@@ -318,12 +313,12 @@ create_unix_socket(struct sockaddr_un &unix_socket_address)
 
 /*
   Create new mysql connection. Created thread is responsible for deletion of
-  the Mysql_connection_thread_args and Vio instances passed to it.
-  SYNOPSYS
+  the Mysql_connection and Vio instances passed to it.
+  SYNOPSIS
     handle_new_mysql_connection()
 */
 
-void Listener::handle_new_mysql_connection(Vio *vio)
+void Listener::handle_new_mysql_connection(struct st_vio *vio)
 {
   Mysql_connection *mysql_connection=
     new Mysql_connection(thread_registry, user_map,

server-tools/instance-manager/log.cc

@@ -33,7 +33,7 @@
 
 /*
   Format log entry and write it to the given stream.
-  SYNOPSYS
+  SYNOPSIS
     log()
 */
 

server-tools/instance-manager/manager.cc

@@ -93,17 +93,17 @@ int my_sigwait(const sigset_t *set, int *sig)
 #endif
 
 
-void stop_all(Guardian *guardian, Thread_registry *registry)
+void Manager::stop_all_threads()
 {
   /*
     Let guardian thread know that it should break it's processing cycle,
     once it wakes up.
   */
-  guardian->request_shutdown();
+  p_guardian->request_shutdown();
   /* wake guardian */
-  pthread_cond_signal(&guardian->COND_guardian);
+  pthread_cond_signal(&p_guardian->COND_guardian);
   /* stop all threads */
-  registry->deliver_shutdown();
+  p_thread_registry->deliver_shutdown();
 }
 
 /**********************************************************************
@@ -112,6 +112,9 @@ void stop_all(Guardian *guardian, Thread_registry *registry)
 
 Guardian *Manager::p_guardian;
 Instance_map *Manager::p_instance_map;
+Thread_registry *Manager::p_thread_registry;
+User_map *Manager::p_user_map;
+pid_t Manager::manager_pid;
 
 /*
   manager - entry point to the main instance manager process: start
@@ -137,8 +140,7 @@ int Manager::main()
   */
 
   User_map user_map;
-  Instance_map instance_map(Options::Main::default_mysqld_path,
-                            thread_registry);
+  Instance_map instance_map;
   Guardian guardian(&thread_registry, &instance_map,
                     Options::Main::monitoring_interval);
 
@@ -147,6 +149,8 @@ int Manager::main()
   manager_pid= getpid();
   p_instance_map= &instance_map;
   p_guardian= instance_map.guardian= &guardian;
+  p_thread_registry= &thread_registry;
+  p_user_map= &user_map;
 
   /* Initialize instance map. */
 
@@ -199,14 +203,11 @@ int Manager::main()
     NOTE: To work nicely with LinuxThreads, the signal thread is the first
     thread in the process.
 
-    NOTE:
-      After init_thr_alarm() call it's possible to call thr_alarm() (from
-      different threads), that results in sending ALARM signal to the alarm
-      thread (which can be the main thread). That signal can interrupt
-      blocking calls.
-
-      In other words, a blocking call can be interrupted in the main thread
-      after init_thr_alarm().
+    NOTE: After init_thr_alarm() call it's possible to call thr_alarm()
+    (from different threads), that results in sending ALARM signal to the
+    alarm thread (which can be the main thread). That signal can interrupt
+    blocking calls. In other words, a blocking call can be interrupted in
+    the main thread after init_thr_alarm().
   */
 
   sigset_t mask;
@@ -230,11 +231,12 @@ int Manager::main()
   */
   if (guardian.start_detached())
   {
-    log_error("manager(): Failed to create the guardian thread");
+    log_error("Error: can not start Guardian thread.");
     goto err;
   }
 
   /* Load instances. */
+
   {
     instance_map.guardian->lock();
     instance_map.lock();
@@ -246,19 +248,18 @@ int Manager::main()
 
     if (flush_instances_status)
     {
-      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_registry);
+      log_error("Error: can not init instances repository.");
+      stop_all_threads();
       goto err;
     }
   }
 
-  /* start the listener */
+  /* Initialize the Listener. */
+
   if (listener.start_detached())
   {
-    log_error("manager(): set_stacksize_n_create_thread(listener) failed");
-    stop_all(&guardian, &thread_registry);
+    log_error("Error: can not start Listener thread.");
+    stop_all_threads();
     goto err;
   }
 
@@ -268,7 +269,9 @@ int Manager::main()
   */
   pthread_cond_signal(&guardian.COND_guardian);
 
-  log_info("Main loop: started.");
+  /* Main loop. */
+
+  log_info("Manager: started.");
 
   while (!shutdown_complete)
   {
@@ -277,8 +280,8 @@ int Manager::main()
 
     if ((status= my_sigwait(&mask, &signo)) != 0)
     {
-      log_error("sigwait() failed");
-      stop_all(&guardian, &thread_registry);
+      log_error("Error: sigwait() failed");
+      stop_all_threads();
       goto err;
     }
 
@@ -304,7 +307,7 @@ int Manager::main()
   Bug #14164 IM tests fail on MacOS X (powermacg5)
 */
 #ifdef IGNORE_SIGHUP_SIGQUIT
-    if ( SIGHUP == signo )
+    if (SIGHUP == signo)
       continue;
 #endif
     if (THR_SERVER_ALARM == signo)
@@ -312,7 +315,7 @@ int Manager::main()
     else
 #endif
     {
-      log_info("Main loop: got shutdown signal.");
+      log_info("Manager: got shutdown signal.");
 
       if (!guardian.is_stopped())
       {
@@ -327,7 +330,7 @@ int Manager::main()
     }
   }
 
-  log_info("Main loop: finished.");
+  log_info("Manager: finished.");
 
   rc= 0;
 

server-tools/instance-manager/manager.h

@@ -19,9 +19,12 @@
 #if defined(__GNUC__) && defined(USE_PRAGMA_INTERFACE)
 #pragma interface
 #endif
+#include <my_global.h>
 
 class Guardian;
 class Instance_map;
+class Thread_registry;
+class User_map;
 
 class Manager
 {
@@ -33,12 +36,18 @@ public:
   */
   static Instance_map *get_instance_map() { return p_instance_map; }
   static Guardian *get_guardian() { return p_guardian; }
+  static Thread_registry *get_thread_registry() { return p_thread_registry; }
+  static User_map *get_user_map() { return p_user_map; }
+  static pid_t get_manager_pid() { return manager_pid; }
 
 private:
-  static int manager_impl();
+  static void stop_all_threads();
 private:
+  static pid_t manager_pid;
   static Guardian *p_guardian;
   static Instance_map *p_instance_map;
+  static Thread_registry *p_thread_registry;
+  static User_map *p_user_map;
 };
 
 #endif // INCLUDES_MYSQL_INSTANCE_MANAGER_MANAGER_H

server-tools/instance-manager/mysqlmanager.cc

@@ -71,6 +71,7 @@ static void daemonize(const char *log_file_name);
 static void angel();
 static struct passwd *check_user(const char *user);
 static int set_user(const char *user, struct passwd *user_info);
+static bool check_if_linuxthreads();
 #endif
 
 
@@ -110,6 +111,9 @@ int main(int argc, char *argv[])
       }
   }
 
+  if (check_if_linuxthreads())
+    goto main_end; /* out of resources */
+
   if (Options::Daemon::run_as_service)
   {
     /* forks, and returns only in child */
@@ -232,7 +236,7 @@ static void init_environment(char *progname)
 #ifndef __WIN__
 /*
   Become a UNIX service
-  SYNOPSYS
+  SYNOPSIS
     daemonize()
 */
 
@@ -392,4 +396,27 @@ spawn:
   }
 }
 
+extern "C" {
+static void *check_if_linuxthreads_thread_func(void *arg)
+{
+  pid_t main_pid= *(pid_t*) arg;
+  linuxthreads= getpid() != main_pid;
+  return NULL; 
+}
+} /* extern "C" */
+
+
+static bool check_if_linuxthreads()
+{
+  pid_t pid= getpid();
+  pthread_t thread_id;
+  int rc;
+
+  rc= pthread_create(&thread_id, NULL, check_if_linuxthreads_thread_func,
+                     (void*) &pid);
+  if (rc == 0)
+    rc= pthread_join(thread_id, NULL);
+
+  return test(rc);
+}
 #endif

server-tools/instance-manager/parse_output.cc

@@ -43,7 +43,7 @@ void trim_space(const char **text, uint *word_len)
 /*
   Parse output of the given command
 
-  SYNOPSYS
+  SYNOPSIS
     parse_output_and_get_value()
 
     command          the command to execue with popen.

server-tools/instance-manager/priv.cc

@@ -22,14 +22,13 @@
 
 #include "log.h"
 
-/* the pid of the manager process (of the signal thread on the LinuxThreads) */
-pid_t manager_pid;
-
+#ifndef __WIN__
 /*
   This flag is set if mysqlmanager has detected that it is running on the
   system using LinuxThreads
 */
 bool linuxthreads;
+#endif
 
 /*
   The following string must be less then 80 characters, as

server-tools/instance-manager/priv.h

@@ -50,9 +50,6 @@ const int MAX_VERSION_LENGTH= 160;
 
 const int MAX_INSTANCE_NAME_SIZE= FN_REFLEN;
 
-/* the pid of the manager process (of the signal thread on the LinuxThreads) */
-extern pid_t manager_pid;
-
 #ifndef __WIN__
 /*
   This flag is set if mysqlmanager has detected that it is running on the

server-tools/instance-manager/user_management_commands.cc

@@ -20,7 +20,7 @@
     This function must not be used in user-management command implementations.
     Use get_user_name() instead.
 
-  SYNOPSYS
+  SYNOPSIS
     get_user_name_impl()
 
   RETURN
@@ -58,7 +58,7 @@ static char *get_user_name_impl()
   (not empty, not exceeds USERNAME_LENGTH). Report to stderr if something is
   wrong.
 
-  SYNOPSYS
+  SYNOPSIS
     get_user_name()
     user_name     [OUT] on success contains user name
 
@@ -102,7 +102,7 @@ static bool get_user_name(LEX_STRING *user_name)
   The password is retrieved from command-line options (if specified) or from
   console.
 
-  SYNOPSYS
+  SYNOPSIS
     get_password()
 
   RETURN
@@ -131,7 +131,7 @@ static const char *get_password()
 /*
   Load password file into user map.
 
-  SYNOPSYS
+  SYNOPSIS
     load_password_file()
     user_map            target user map
 
@@ -160,7 +160,7 @@ static int load_password_file(User_map *user_map)
 /*
   Save user map into password file.
 
-  SYNOPSYS
+  SYNOPSIS
     save_password_file()
     user_map            user map
 

server-tools/instance-manager/user_management_commands.h

@@ -49,7 +49,7 @@ public:
   /*
     Executes user-management command.
 
-    SYNOPSYS
+    SYNOPSIS
       execute()
 
     RETURN

server-tools/instance-manager/user_map.cc

@@ -159,7 +159,7 @@ User_map::~User_map()
 /*
   Load password database.
 
-  SYNOPSYS
+  SYNOPSIS
     load()
     password_file_name  [IN] password file path
     err_msg             [OUT] error message