Libmysqld improvements

sql/convert.cc

@@ -473,3 +473,12 @@ bool CONVERT::store(String *packet,const char *from,uint length)
   packet->length((uint) (to-packet->ptr()));
   return 0;
 }
+
+#ifdef EMBEDDED_LIBRARY
+void CONVERT::convert_back(char *dest, const char *source, uint length) const
+{
+  for (char *end= dest+length; dest < end; dest++, source++)
+    *dest= to_map[*source];
+}
+#endif
+

sql/item.cc

@@ -816,11 +816,64 @@ bool Item::send(THD *thd, String *packet)
   return net_store_data(packet,res->ptr(),res->length());
 }
 
+
 bool Item_null::send(THD *thd, String *packet)
 {
   return net_store_null(packet);
 }
 
+#ifdef EMBEDDED_LIBRARY
+bool Item::embedded_send(const CONVERT *convert, CHARSET_INFO *charset, MEM_ROOT *alloc, 
+			 char **result, ulong *length)
+{
+  char buff[MAX_FIELD_WIDTH];
+  String s(buff, sizeof(buff), charset), *value;
+  if (!(value=val_str(&s)) ||
+      !(*result=alloc_root(alloc, value->length() + 1)))
+    return true;
+  *length= value->length();
+  if (convert)
+    convert->convert_back(*result, value->ptr(), *length);
+  else
+    memcpy(*result, value->ptr(), *length);
+  (*result)[*length]= 0;
+  return false;
+}
+
+bool Item_null::embedded_send(const CONVERT *convert, CHARSET_INFO *charset, MEM_ROOT *alloc, 
+			     char **result, ulong *length)
+{
+  *result= NULL;
+  return false;
+}
+
+bool Item_field::embedded_send(const CONVERT *convert, CHARSET_INFO *charset, MEM_ROOT *alloc, 
+			       char **result, ulong *length)
+{
+  if (result_field->is_null())
+  {
+    result= NULL;
+    return false;
+  }
+
+  char buff[MAX_FIELD_WIDTH];
+  String tmp(buff,sizeof(buff),default_charset_info);
+  result_field->val_str(&tmp,&tmp);
+
+  if (!(*result=alloc_root(alloc, tmp.length() + 1)))
+    return true;
+  *length= tmp.length();
+  if (convert)
+    convert->convert_back(*result, tmp.ptr(), *length);
+  else
+    memcpy(*result, tmp.ptr(), *length);
+  (*result)[*length]= 0;
+  return false;
+}
+
+#endif
+
+
 /*
   This is used for HAVING clause
   Find field in select list having the same name

sql/item.h

@@ -22,6 +22,8 @@
 struct st_table_list;
 void item_init(void);				/* Init item functions */
 
+class CONVERT;
+
 class Item {
   Item(const Item &);				/* Prevent use of these */
   void operator=(Item &);
@@ -59,6 +61,10 @@ class Item {
   virtual int save_safe_in_field(Field *field)
     { return save_in_field(field); }
   virtual bool send(THD *thd, String *str);
+#ifdef EMBEDDED_LIBRARY
+  virtual bool embedded_send(const CONVERT *convert, CHARSET_INFO *charset, MEM_ROOT *alloc, 
+			     char **result, ulong *length);
+#endif
   virtual bool eq(const Item *, bool binary_cmp) const;
   virtual Item_result result_type () const { return REAL_RESULT; }
   virtual enum Type type() const =0;
@@ -128,6 +134,10 @@ class Item_field :public Item_ident
   {
     return result_field->send(thd,str_arg);
   }
+#ifdef EMBEDDED_LIBRARY
+  bool embedded_send(const CONVERT *convert, CHARSET_INFO *charset, MEM_ROOT *alloc, 
+		     char **result, ulong *length);
+#endif
   void make_field(Send_field *field);
   bool fix_fields(THD *, struct st_table_list *, Item **);
   int  save_in_field(Field *field);
@@ -160,6 +170,10 @@ class Item_null :public Item
   enum Item_result result_type () const
   { return STRING_RESULT; }
   bool send(THD *thd, String *str);
+#ifdef EMBEDDED_LIBRARY
+  bool embedded_send(const CONVERT *convert, CHARSET_INFO *charset, MEM_ROOT *alloc, 
+		     char **result, ulong *length);
+#endif
   bool basic_const_item() const { return 1; }
   Item *new_item() { return new Item_null(name); }
   bool is_null() { return 1; }
@@ -423,6 +437,11 @@ class Item_ref :public Item_ident
     return (null_value=(*ref)->get_date(ltime,fuzzydate));
   }
   bool send(THD *thd, String *tmp)	{ return (*ref)->send(thd, tmp); }
+#ifdef EMBEDDED_LIBRARY
+  bool embedded_send(const CONVERT *convert, CHARSET_INFO *charset, MEM_ROOT *alloc, 
+		     char **result, ulong *length)
+    { return (*ref)->embedded_send(convert, charset, alloc, result, length); }
+#endif
   void make_field(Send_field *field)	{ (*ref)->make_field(field); }
   bool fix_fields(THD *, struct st_table_list *, Item **);
   int  save_in_field(Field *field)	{ return (*ref)->save_in_field(field); }

sql/mysqld.cc

@@ -1768,13 +1768,11 @@ bool open_log(MYSQL_LOG *log, const char *hostname,
 		   no_auto_events);
 }
 
-static int init_common_variables(char *progname, 
-				 const char *conf_file_name, int argc, char **argv,
+static int init_common_variables(const char *conf_file_name, int argc, char **argv,
 				 const char **groups)
 {
   my_umask=0660;		// Default umask for new files
   my_umask_dir=0700;		// Default umask for new directories
-  MY_INIT(progname);		// init my_sys library & pthreads
   umask(((~my_umask) & 0666));
   tzset();			// Set tzname
 
@@ -1999,7 +1997,74 @@ static void create_maintenance_thread()
   }
 }
 
-#ifdef _DUMMY
+static void create_shutdown_thread()
+{
+
+#ifdef __WIN__
+  {
+    hEventShutdown=CreateEvent(0, FALSE, FALSE, event_name);
+    pthread_t hThread;
+    if (pthread_create(&hThread,&connection_attrib,handle_shutdown,0))
+      sql_print_error("Warning: Can't create thread to handle shutdown requests");
+
+    // On "Stop Service" we have to do regular shutdown
+    Service.SetShutdownEvent(hEventShutdown);
+  }
+#endif
+#ifdef OS2
+  {
+    pthread_cond_init( &eventShutdown, NULL);
+    pthread_t hThread;
+    if (pthread_create(&hThread,&connection_attrib,handle_shutdown,0))
+      sql_print_error("Warning: Can't create thread to handle shutdown requests");
+  }
+#endif
+}
+
+#ifdef __NT__
+void create_named_pipe_thread()
+{
+  if (hPipe == INVALID_HANDLE_VALUE &&
+      (!have_tcpip || opt_disable_networking))
+  {
+    sql_print_error("TCP/IP or --enable-named-pipe should be configured on NT OS");
+	unireg_abort(1);
+  }
+  else
+  {
+    pthread_mutex_lock(&LOCK_thread_count);
+    (void) pthread_cond_init(&COND_handler_count,NULL);
+    {
+      pthread_t hThread;
+      handler_count=0;
+      if (hPipe != INVALID_HANDLE_VALUE && opt_enable_named_pipe)
+      {
+	handler_count++;
+	if (pthread_create(&hThread,&connection_attrib,
+			   handle_connections_namedpipes, 0))
+	{
+	  sql_print_error("Warning: Can't create thread to handle named pipes");
+	  handler_count--;
+	}
+      }
+      if (have_tcpip && !opt_disable_networking)
+      {
+	handler_count++;
+	if (pthread_create(&hThread,&connection_attrib,
+			   handle_connections_sockets, 0))
+	{
+	  sql_print_error("Warning: Can't create thread to handle named pipes");
+	  handler_count--;
+	}
+      }
+      while (handler_count > 0)
+	pthread_cond_wait(&COND_handler_count,&LOCK_thread_count);
+    }
+    pthread_mutex_unlock(&LOCK_thread_count);
+  }
+}
+#endif
+
 #ifdef __WIN__
 int win_main(int argc, char **argv)
 #else
@@ -2009,25 +2074,18 @@ int main(int argc, char **argv)
   int init_error;
 
   DEBUGGER_OFF;
-//  MAIN_THD;
-  /*
-    Initialize signal_th and shutdown_th to main_th for default value
-    as we need to initialize them to something safe. They are used
-    when compiled with safemalloc.
-  */
-//  SIGNAL_THD;
-//  SHUTDOWN_THD;
 
-/*#ifdef _CUSTOMSTARTUPCONFIG_
+#ifdef _CUSTOMSTARTUPCONFIG_
   if (_cust_check_startup())
   {
     / * _cust_check_startup will report startup failure error * /
     exit( 1 );
   }
 #endif
-*/
-  if ((init_error=init_common_variables(argv[0], MYSQL_CONFIG_NAME, 
-				       argc, argv, load_default_groups)))
+
+  MY_INIT(argv[0]);		// init my_sys library & pthreads
+  if ((init_error=init_common_variables(MYSQL_CONFIG_NAME, 
+					argc, argv, load_default_groups)))
     if (init_error == 2)
       unireg_abort(1);
     else
@@ -2145,70 +2203,14 @@ The server will not act as a slave.");
     }
   }
 
-#ifdef __WIN__
-  {
-    hEventShutdown=CreateEvent(0, FALSE, FALSE, event_name);
-    pthread_t hThread;
-    if (pthread_create(&hThread,&connection_attrib,handle_shutdown,0))
-      sql_print_error("Warning: Can't create thread to handle shutdown requests");
-
-    // On "Stop Service" we have to do regular shutdown
-    Service.SetShutdownEvent(hEventShutdown);
-  }
-#endif
-#ifdef OS2
-  {
-    pthread_cond_init( &eventShutdown, NULL);
-    pthread_t hThread;
-    if (pthread_create(&hThread,&connection_attrib,handle_shutdown,0))
-      sql_print_error("Warning: Can't create thread to handle shutdown requests");
-  }
-#endif
-
+  create_shutdown_thread();
   create_maintenance_thread();
 
   printf(ER(ER_READY),my_progname,server_version,"");
   fflush(stdout);
 
 #ifdef __NT__
-  if (hPipe == INVALID_HANDLE_VALUE &&
-      (!have_tcpip || opt_disable_networking))
-  {
-    sql_print_error("TCP/IP or --enable-named-pipe should be configured on NT OS");
-	unireg_abort(1);
-  }
-  else
-  {
-    pthread_mutex_lock(&LOCK_thread_count);
-    (void) pthread_cond_init(&COND_handler_count,NULL);
-    {
-      pthread_t hThread;
-      handler_count=0;
-      if (hPipe != INVALID_HANDLE_VALUE && opt_enable_named_pipe)
-      {
-	handler_count++;
-	if (pthread_create(&hThread,&connection_attrib,
-			   handle_connections_namedpipes, 0))
-	{
-	  sql_print_error("Warning: Can't create thread to handle named pipes");
-	  handler_count--;
-	}
-      }
-      if (have_tcpip && !opt_disable_networking)
-      {
-	handler_count++;
-	if (pthread_create(&hThread,&connection_attrib,
-			   handle_connections_sockets, 0))
-	{
-	  sql_print_error("Warning: Can't create thread to handle named pipes");
-	  handler_count--;
-	}
-      }
-      while (handler_count > 0)
-	pthread_cond_wait(&COND_handler_count,&LOCK_thread_count);
-    }
-    pthread_mutex_unlock(&LOCK_thread_count);
-  }
+  create_named_pipe_thread();
 #else
   handle_connections_sockets(0);
 #ifdef EXTRA_DEBUG2
@@ -2254,7 +2256,8 @@ The server will not act as a slave.");
   exit(0);
   return(0);					/* purecov: deadcode */
 }
-#endif
+
+#ifdef _DUMMY
 
 #ifdef __WIN__
 int win_main(int argc, char **argv)
@@ -2693,6 +2696,7 @@ The server will not act as a slave.");
   exit(0);
   return(0);					/* purecov: deadcode */
 }
+#endif
 
 /****************************************************************************
   Main and thread entry function for Win32

sql/sql_class.h

@@ -178,6 +178,9 @@ class CONVERT
     convert_array(from_map, (uchar*) a,length);
   }
   bool store(String *, const char *,uint);
+#ifdef EMBEDDED_LIBRARY
+  void convert_back(char *dest, const char *source, uint length) const;
+#endif
   inline uint number() { return numb; }
 };