/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */


/* Write some debug info */


#include "mysql_priv.h"
#include "sql_select.h"
#include <hash.h>
#include <thr_alarm.h>

/* Intern key cache variables */
extern "C" pthread_mutex_t THR_LOCK_keycache;

#ifndef DBUG_OFF

void
print_where(COND *cond,const char *info)
{
  if (cond)
  {
    char buff[256];
    String str(buff,(uint32) sizeof(buff), default_charset_info);
    str.length(0);
    cond->print(&str);
    str.append('\0');
    DBUG_LOCK_FILE;
    (void) fprintf(DBUG_FILE,"\nWHERE:(%s) ",info);
    (void) fputs(str.ptr(),DBUG_FILE);
    (void) fputc('\n',DBUG_FILE);
    DBUG_UNLOCK_FILE;
  }
}

	/* This is for debugging purposes */

extern HASH open_cache;
extern TABLE *unused_tables;

static const char *lock_descriptions[] =
{
  "No lock",
  "Low priority read lock",
  "Shared Read lock",
  "High priority read lock",
  "Read lock  without concurrent inserts",
  "Write lock that allows other writers",
  "Write lock, but allow reading",
  "Concurrent insert lock",
  "Lock Used by delayed insert",
  "Low priority write lock",
  "High priority write lock",
  "Highest priority write lock"
};


void print_cached_tables(void)
{
  uint idx,count,unused;
  TABLE *start_link,*lnk;

  VOID(pthread_mutex_lock(&LOCK_open));
  puts("DB             Table                            Version  Thread  L.thread  Open  Lock");

  for (idx=unused=0 ; idx < open_cache.records ; idx++)
  {
    TABLE *entry=(TABLE*) hash_element(&open_cache,idx);
    printf("%-14.14s %-32s%6ld%8ld%10ld%6d  %s\n",
	   entry->table_cache_key,entry->real_name,entry->version,
	   entry->in_use ? entry->in_use->thread_id : 0L,
	   entry->in_use ? entry->in_use->dbug_thread_id : 0L,
	   entry->db_stat ? 1 : 0, entry->in_use ? lock_descriptions[(int)entry->reginfo.lock_type] : "Not in use");
    if (!entry->in_use)
      unused++;
  }
  count=0;
  if ((start_link=lnk=unused_tables))
  {
    do
    {
      if (lnk != lnk->next->prev || lnk != lnk->prev->next)
      {
	printf("unused_links isn't linked properly\n");
	return;
      }
    } while (count++ < open_cache.records && (lnk=lnk->next) != start_link);
    if (lnk != start_link)
    {
      printf("Unused_links aren't connected\n");
    }
  }
  if (count != unused)
    printf("Unused_links (%d) doesn't match open_cache: %d\n", count,unused);
  printf("\nCurrent refresh version: %ld\n",refresh_version);
  if (hash_check(&open_cache))
    printf("Error: File hash table is corrupted\n");
  fflush(stdout);
  VOID(pthread_mutex_unlock(&LOCK_open));
  return;
}


void TEST_filesort(SORT_FIELD *sortorder,uint s_length)
{
  char buff[256],buff2[256];
  String str(buff,sizeof(buff),default_charset_info);
  String out(buff2,sizeof(buff2),default_charset_info);
  const char *sep;
  DBUG_ENTER("TEST_filesort");

  out.length(0);
  for (sep=""; s_length-- ; sortorder++, sep=" ")
  {
    out.append(sep);
    if (sortorder->reverse)
      out.append('-');
    if (sortorder->field)
    {
      if (sortorder->field->table_name)
      {
	out.append(sortorder->field->table_name);
	out.append('.');
      }
      out.append(sortorder->field->field_name ? sortorder->field->field_name:
		 "tmp_table_column");
    }
    else
    {
      str.length(0);
      sortorder->item->print(&str);
      out.append(str);
    }
  }
  out.append('\0');				// Purify doesn't like c_ptr()
  DBUG_LOCK_FILE;
  VOID(fputs("\nInfo about FILESORT\n",DBUG_FILE));
  fprintf(DBUG_FILE,"Sortorder: %s\n",out.ptr());
  DBUG_UNLOCK_FILE;
  DBUG_VOID_RETURN;
}


void
TEST_join(JOIN *join)
{
  uint i,ref;
  DBUG_ENTER("TEST_join");

  DBUG_LOCK_FILE;
  VOID(fputs("\nInfo about JOIN\n",DBUG_FILE));
  for (i=0 ; i < join->tables ; i++)
  {
    JOIN_TAB *tab=join->join_tab+i;
    TABLE *form=tab->table;
    fprintf(DBUG_FILE,"%-16.16s  type: %-7s  q_keys: %4d  refs: %d  key: %d  len: %d\n",
	    form->table_name,
	    join_type_str[tab->type],
	    tab->keys,
	    tab->ref.key_parts,
	    tab->ref.key,
	    tab->ref.key_length);
    if (tab->select)
    {
      if (tab->use_quick == 2)
	fprintf(DBUG_FILE,
		"                  quick select checked for each record (keys: %d)\n",
		(int) tab->select->quick_keys);
      else if (tab->select->quick)
	fprintf(DBUG_FILE,"                  quick select used on key %s, length: %d\n",
		form->key_info[tab->select->quick->index].name,
		tab->select->quick->max_used_key_length);
      else
	VOID(fputs("                  select used\n",DBUG_FILE));
    }
    if (tab->ref.key_parts)
    {
      VOID(fputs("                  refs: ",DBUG_FILE));
      for (ref=0 ; ref < tab->ref.key_parts ; ref++)
      {
	Item *item=tab->ref.items[ref];
	fprintf(DBUG_FILE,"%s  ", item->full_name());
      }
      VOID(fputc('\n',DBUG_FILE));
    }
  }
  DBUG_UNLOCK_FILE;
  DBUG_VOID_RETURN;
}

#endif

void mysql_print_status(THD *thd)
{
  char current_dir[FN_REFLEN];
  printf("\nStatus information:\n\n");
  my_getwd(current_dir, sizeof(current_dir),MYF(0));
  printf("Current dir: %s\n", current_dir);
  if (thd)
    thd->proc_info="locks";
  thr_print_locks();				// Write some debug info
#ifndef DBUG_OFF
  if (thd)
    thd->proc_info="table cache";
  print_cached_tables();
#endif
  /* Print key cache status */
  if (thd)
    thd->proc_info="key cache";
  pthread_mutex_lock(&THR_LOCK_keycache);
  printf("key_cache status:\n\
blocks used:%10lu\n\
not flushed:%10lu\n\
w_requests: %10lu\n\
writes:     %10lu\n\
r_requests: %10lu\n\
reads:      %10lu\n",
	 _my_blocks_used,_my_blocks_changed,_my_cache_w_requests,
	 _my_cache_write,_my_cache_r_requests,_my_cache_read);
  pthread_mutex_unlock(&THR_LOCK_keycache);

  if (thd)
    thd->proc_info="status";
  pthread_mutex_lock(&LOCK_status);
  printf("\nhandler status:\n\
read_key:   %10lu\n\
read_next:  %10lu\n\
read_rnd    %10lu\n\
read_first: %10lu\n\
write:      %10lu\n\
delete      %10lu\n\
update:     %10lu\n",
	 ha_read_key_count, ha_read_next_count,
	 ha_read_rnd_count, ha_read_first_count,
	 ha_write_count, ha_delete_count, ha_update_count);
  pthread_mutex_unlock(&LOCK_status);
  printf("\nTable status:\n\
Opened tables: %10lu\n\
Open tables:   %10lu\n\
Open files:    %10lu\n\
Open streams:  %10lu\n",
	 opened_tables,
	 (ulong) cached_tables(),
	 (ulong) my_file_opened,
	 (ulong) my_stream_opened);

  ALARM_INFO alarm_info;
#ifndef DONT_USE_THR_ALARM
  thr_alarm_info(&alarm_info);
  printf("\nAlarm status:\n\
Active alarms:   %u\n\
Max used alarms: %u\n\
Next alarm time: %lu\n",
	 alarm_info.active_alarms,
	 alarm_info.max_used_alarms,
	 alarm_info.next_alarm_time);
#endif
  fflush(stdout);
  if (thd)
    thd->proc_info="malloc";
  my_checkmalloc();
  TERMINATE(stdout);				// Write malloc information
  if (thd)
    thd->proc_info=0;
}