Fix for SAFE_MUTEX + MERGE tables

Docs/manual.texi:
  Fix for release
include/my_pthread.h:
  Fix for SAFE_MUTEX for windows
include/myisammrg.h:
  Fix for empty MERGE tables
myisam/ft_stopwords.c:
  Free used memory
myisammrg/myrg_open.c:
  Fix for empty MERGE tables
myisammrg/myrg_queue.c:
  Fix for empty MERGE tables
myisammrg/myrg_rfirst.c:
  cleanup
myisammrg/myrg_rkey.c:
  cleanup
mysys/my_thr_init.c:
  Fix SAFE_MUTEX for windows
mysys/my_winthread.c:
  Fix SAFE_MUTEX for windows
mysys/thr_mutex.c:
  Fix SAFE_MUTEX for windows
sql/ha_myisammrg.cc:
  Fix for empty MERGE tables
sql/mysqld.cc:
  Fix type

Docs/manual.texi

@@ -40860,6 +40860,9 @@ Fixed @code{DISTINCT} with calculated columns.
 
 @itemize @bullet
 @item
+@code{mysqldump} on a @code{MERGE} table doesn't include the current
+mapped tables.
+@item
 For the moment @code{MATCH} only works with @code{SELECT} statements.
 @item
 You cannot build in another directory when using

include/my_pthread.h

@@ -60,6 +60,7 @@ typedef int pthread_mutexattr_t;
 #define pthread_handler_decl(A,B) unsigned __cdecl A(void *B)
 typedef unsigned (__cdecl *pthread_handler)(void *);
 
+void win_pthread_init(void);
 int win_pthread_setspecific(void *A,void *B,uint length);
 int pthread_create(pthread_t *,pthread_attr_t *,pthread_handler,void *);
 int pthread_cond_init(pthread_cond_t *cond, const pthread_condattr_t *attr);

include/myisammrg.h

@@ -59,7 +59,7 @@ typedef struct st_myrg_info
   ulonglong records;			/* records in tables */
   ulonglong del;			/* Removed records */
   ulonglong data_file_length;
-  uint	 tables,options,reclength;
+  uint	 tables,options,reclength,keys;
   my_bool cache_in_use;
   LIST	open_list;
   QUEUE     by_key;

myisam/ft_stopwords.c

@@ -72,6 +72,7 @@ void ft_free_stopwords()
   if (stopwords3)
   {
     delete_tree(stopwords3); /* purecov: inspected */    
+    my_free((char*) stopwords3,MYF(0));
     stopwords3=0;
   }
 }

myisammrg/myrg_open.c

@@ -86,6 +86,7 @@ int handle_locking;
   *m_info=info;
   m_info->open_tables=(MYRG_TABLE *) (m_info+1);
   m_info->tables=files;
+  errpos=2;
  
   for (i=files ; i-- > 0 ; )
   {
@@ -104,16 +105,21 @@ int handle_locking;
     m_info->open_tables[i].file_offset=(my_off_t) file_offset;
     file_offset+=m_info->open_tables[i].table->state->data_file_length;
   }
-  errpos=2;
   if (sizeof(my_off_t) == 4 && file_offset > (ulonglong) (ulong) ~0L)
   {
     my_errno=HA_ERR_RECORD_FILE_FULL;
     goto err;
   }
   /* Allocate memory for queue */
-  if (m_info->open_tables->table->s->base.keys &&
-      _myrg_init_queue(m_info,0,HA_READ_KEY_EXACT))
-    goto err;
+  m_info->keys=0;
+  if (files)
+  {
+    if ((m_info->keys=m_info->open_tables->table->s->base.keys) &&
+	_myrg_init_queue(m_info,0,HA_READ_KEY_EXACT))
+      goto err;
+  }
+  else
+    bzero((char*) &m_info->by_key,sizeof(m_info->by_key));
 
   m_info->end_table=m_info->open_tables+files;
   m_info->last_used_table=m_info->open_tables;

myisammrg/myrg_queue.c

@@ -34,21 +34,24 @@ int _myrg_init_queue(MYRG_INFO *info,int inx,enum ha_rkey_function search_flag)
   int error=0;
   QUEUE *q= &(info->by_key);
 
-  if (!is_queue_inited(q))
+  if (inx < (int) info->keys)
   {
-    if (init_queue(q,info->tables, 0,
-                   (myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
-                   queue_key_cmp,
-                   info->open_tables->table->s->keyinfo[inx].seg))
-      error=my_errno;
-  }
-  else
-  {
-    if (reinit_queue(q,info->tables, 0,
-                     (myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
-                     queue_key_cmp,
-                     info->open_tables->table->s->keyinfo[inx].seg))
-      error=my_errno;
+    if (!is_queue_inited(q))
+    {
+      if (init_queue(q,info->tables, 0,
+		     (myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
+		     queue_key_cmp,
+		     info->open_tables->table->s->keyinfo[inx].seg))
+	error=my_errno;
+    }
+    else
+    {
+      if (reinit_queue(q,info->tables, 0,
+		       (myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
+		       queue_key_cmp,
+		       info->open_tables->table->s->keyinfo[inx].seg))
+	error=my_errno;
+    }
   }
   return error;
 }

myisammrg/myrg_rfirst.c

@@ -27,7 +27,7 @@ int myrg_rfirst(MYRG_INFO *info, byte *buf, int inx)
   if (_myrg_init_queue(info,inx,HA_READ_KEY_OR_NEXT))
     return my_errno;
 
-  for (table=info->open_tables ; table < info->end_table ; table++)
+  for (table=info->open_tables ; table != info->end_table ; table++)
   {
     if ((err=mi_rfirst(table->table,NULL,inx)))
     {

myisammrg/myrg_rkey.c

@@ -49,7 +49,7 @@ int myrg_rkey(MYRG_INFO *info,byte *record,int inx, const byte *key,
   if (_myrg_init_queue(info,inx,search_flag))
     return my_errno;
 
-  for (table=info->open_tables ; table < info->end_table ; table++)
+  for (table=info->open_tables ; table != info->end_table ; table++)
   {
     mi=table->table;
 

mysys/my_thr_init.c

@@ -35,9 +35,6 @@ pthread_mutex_t THR_LOCK_malloc,THR_LOCK_open,THR_LOCK_keycache,
 #ifndef HAVE_LOCALTIME_R
 pthread_mutex_t LOCK_localtime_r;
 #endif
-#ifdef __WIN__
-pthread_mutex_t THR_LOCK_thread;
-#endif
 
 /* FIXME  Note.  TlsAlloc does not set an auto destructor, so
 	the function my_thread_global_free must be called from
@@ -60,7 +57,7 @@ my_bool my_thread_global_init(void)
   pthread_mutex_init(&THR_LOCK_net,NULL);
   pthread_mutex_init(&THR_LOCK_charset,NULL);
 #ifdef __WIN__
-  pthread_mutex_init(&THR_LOCK_thread,NULL);
+  win_pthread_init();
 #endif
 #ifndef HAVE_LOCALTIME_R
   pthread_mutex_init(&LOCK_localtime_r,NULL);
@@ -78,7 +75,7 @@ void my_thread_global_end(void)
 static long thread_id=0;
 
 /*
-  We can't use mutex_locks here if we re using windows as
+  We can't use mutex_locks here if we are using windows as
   we may have compiled the program with SAFE_MUTEX, in which
   case the checking of mutex_locks will not work until
   the pthread_self thread specific variable is initialized.

mysys/my_winthread.c

@@ -19,13 +19,16 @@
 ** Simulation of posix threads calls for WIN95 and NT
 *****************************************************************************/
 
+/* SAFE_MUTEX will not work until the thread structure is up to date */
+#undef SAFE_MUTEX
+
 #include "mysys_priv.h"
 #if defined(THREAD) && defined(__WIN__)
 #include <m_string.h>
 #undef getpid
 #include <process.h>
 
-extern pthread_mutex_t THR_LOCK_thread;
+static pthread_mutex_t THR_LOCK_thread;
 
 struct pthread_map
 {
@@ -34,6 +37,11 @@ struct pthread_map
   void *param;
 };
 
+void win_pthread_init(void)
+{
+  pthread_mutex_init(&THR_LOCK_thread,NULL);
+}
+
 /*
 ** We have tried to use '_beginthreadex' instead of '_beginthread' here
 ** but in this case the program leaks about 512 characters for each

mysys/thr_mutex.c

@@ -67,6 +67,7 @@ int safe_mutex_lock(safe_mutex_t *mp,const char *file, uint line)
   {
     fprintf(stderr,"safe_mutex: Trying to lock mutex at %s, line %d, when the mutex was already locked at %s, line %d\n",
 	    file,line,mp->file,mp->line);
+    fflush(stderr);
     abort();
   }
   pthread_mutex_unlock(&mp->global);
@@ -75,11 +76,13 @@ int safe_mutex_lock(safe_mutex_t *mp,const char *file, uint line)
   {
     fprintf(stderr,"Got error %d when trying to lock mutex at %s, line %d\n",
 	    error, file, line);
+    fflush(stderr);
     abort();
   }
   if (mp->count++)
   {
     fprintf(stderr,"safe_mutex: Error in thread libray: Got mutex at %s, line %d more than 1 time\n", file,line);
+    fflush(stderr);
     abort();
   }
   mp->thread=pthread_self();
@@ -98,12 +101,14 @@ int safe_mutex_unlock(safe_mutex_t *mp,const char *file, uint line)
   {
     fprintf(stderr,"safe_mutex: Trying to unlock mutex that wasn't locked at %s, line %d\n            Last used at %s, line: %d\n",
 	    file,line,mp->file ? mp->file : "",mp->line);
+    fflush(stderr);
     abort();
   }
   if (!pthread_equal(pthread_self(),mp->thread))
   {
     fprintf(stderr,"safe_mutex: Trying to unlock mutex at %s, line %d  that was locked by another thread at: %s, line: %d\n",
 	    file,line,mp->file,mp->line);
+    fflush(stderr);
     abort();
   }
   mp->count--;
@@ -115,6 +120,7 @@ int safe_mutex_unlock(safe_mutex_t *mp,const char *file, uint line)
   if (error)
   {
     fprintf(stderr,"safe_mutex: Got error: %d when trying to unlock mutex at %s, line %d\n", error, file, line);
+    fflush(stderr);
     abort();
   }
 #endif /* __WIN__ */
@@ -131,12 +137,14 @@ int safe_cond_wait(pthread_cond_t *cond, safe_mutex_t *mp, const char *file,
   if (mp->count == 0)
   {
     fprintf(stderr,"safe_mutex: Trying to cond_wait on a unlocked mutex at %s, line %d\n",file,line);
+    fflush(stderr);
     abort();
   }
   if (!pthread_equal(pthread_self(),mp->thread))
   {
     fprintf(stderr,"safe_mutex: Trying to cond_wait on a mutex at %s, line %d  that was locked by another thread at: %s, line: %d\n",
 	    file,line,mp->file,mp->line);
+    fflush(stderr);
     abort();
   }
 
@@ -144,6 +152,7 @@ int safe_cond_wait(pthread_cond_t *cond, safe_mutex_t *mp, const char *file,
   {
     fprintf(stderr,"safe_mutex:  Count was %d on locked mutex at %s, line %d\n",
 	    mp->count+1, file, line);
+    fflush(stderr);
     abort();
   }
   pthread_mutex_unlock(&mp->global);
@@ -152,6 +161,7 @@ int safe_cond_wait(pthread_cond_t *cond, safe_mutex_t *mp, const char *file,
   if (error)
   {
     fprintf(stderr,"safe_mutex: Got error: %d when doing a safe_mutex_wait at %s, line %d\n", error, file, line);
+    fflush(stderr);
     abort();
   }
   if (mp->count++)
@@ -159,6 +169,7 @@ int safe_cond_wait(pthread_cond_t *cond, safe_mutex_t *mp, const char *file,
     fprintf(stderr,
 	    "safe_mutex:  Count was %d in thread %lx when locking mutex at %s, line %d\n",
 	    mp->count-1, my_thread_id(), file, line);
+    fflush(stderr);
     abort();
   }
   mp->thread=pthread_self();
@@ -178,6 +189,7 @@ int safe_cond_timedwait(pthread_cond_t *cond, safe_mutex_t *mp,
   if (mp->count != 1 || !pthread_equal(pthread_self(),mp->thread))
   {
     fprintf(stderr,"safe_mutex: Trying to cond_wait at %s, line %d on a not hold mutex\n",file,line);
+    fflush(stderr);
     abort();
   }
   mp->count--;					/* Mutex will be released */
@@ -195,6 +207,7 @@ int safe_cond_timedwait(pthread_cond_t *cond, safe_mutex_t *mp,
     fprintf(stderr,
 	    "safe_mutex:  Count was %d in thread %lx when locking mutex at %s, line %d (error: %d)\n",
 	    mp->count-1, my_thread_id(), file, line, error);
+    fflush(stderr);
     abort();
   }
   mp->thread=pthread_self();
@@ -211,6 +224,7 @@ int safe_mutex_destroy(safe_mutex_t *mp, const char *file, uint line)
   {
     fprintf(stderr,"safe_mutex: Trying to destroy a mutex that was locked at %s, line %d at %s, line %d\n",
 	    mp->file,mp->line, file, line);
+    fflush(stderr);
     abort();
   }
 #ifdef __WIN__ 

sql/ha_myisammrg.cc

@@ -48,7 +48,7 @@ int ha_myisammrg::open(const char *name, int mode, int test_if_locked)
   info(HA_STATUS_NO_LOCK | HA_STATUS_VARIABLE | HA_STATUS_CONST);
   if (!(test_if_locked & HA_OPEN_WAIT_IF_LOCKED))
     myrg_extra(file,HA_EXTRA_WAIT_LOCK);
-  if (table->reclength != mean_rec_length)
+  if (table->reclength != mean_rec_length && mean_rec_length)
   {
     DBUG_PRINT("error",("reclength: %d  mean_rec_length: %d",
 			table->reclength, mean_rec_length));

sql/mysqld.cc

@@ -2400,7 +2400,7 @@ struct show_var_st init_vars[]= {
   {"interactive_timeout",     (char*) &net_interactive_timeout,     SHOW_LONG},
   {"key_buffer_size",         (char*) &keybuff_size,                SHOW_LONG},
   {"language",                language,                             SHOW_CHAR},
-#ifdef HAVE_MEMLOCKALL
+#ifdef HAVE_MLOCKALL
   {"locked_in_memory",	      (char*) &locked_in_memory,	    SHOW_BOOL},
 #endif
   {"log",                     (char*) &opt_log,                     SHOW_BOOL},