Review fixes:

Fixed portability problem with bool in C programs
Moved close_thread_tables out from LOCK_thread_count mutex (safety fix)
my_sleep() -> pthread_cond_timedwait()


include/thr_lock.h:
  bool -> my_bool (bool is not portable in C programs)
mysys/thr_lock.c:
  bool -> my_bool (bool is not portable in C programs)
sql/lock.cc:
  Added comment
  Don't use | on bool variable
sql/mysql_priv.h:
  Added comment
sql/slave.cc:
  Moved close_thread_tables out from LOCK_thread_count mutex (safety fix)
sql/sql_base.cc:
  Added comments
  my_sleep() -> pthread_cond_timedwait() to get less code and potentitally faster loop
BitKeeper/etc/ignore:
  added ac_available_languages_fragment

.bzrignore

@@ -546,3 +546,4 @@ vio/viotest-ssl
 scripts/make_win_binary_distribution
 EXCEPTIONS-CLIENT
 support-files/my-innodb-heavy-4G.cnf
+ac_available_languages_fragment

include/thr_lock.h

@@ -107,7 +107,7 @@ void thr_unlock(THR_LOCK_DATA *data);
 int thr_multi_lock(THR_LOCK_DATA **data,uint count);
 void thr_multi_unlock(THR_LOCK_DATA **data,uint count);
 void thr_abort_locks(THR_LOCK *lock);
-bool thr_abort_locks_for_thread(THR_LOCK *lock, pthread_t thread);
+my_bool thr_abort_locks_for_thread(THR_LOCK *lock, pthread_t thread);
 void thr_print_locks(void);		/* For debugging */
 my_bool thr_upgrade_write_delay_lock(THR_LOCK_DATA *data);
 my_bool thr_reschedule_write_lock(THR_LOCK_DATA *data);

mysys/thr_lock.c

@@ -966,10 +966,10 @@ void thr_abort_locks(THR_LOCK *lock)
   This is used to abort all locks for a specific thread
 */
 
-bool thr_abort_locks_for_thread(THR_LOCK *lock, pthread_t thread)
+my_bool thr_abort_locks_for_thread(THR_LOCK *lock, pthread_t thread)
 {
   THR_LOCK_DATA *data;
-  bool found= FALSE;
+  my_bool found= FALSE;
   DBUG_ENTER("thr_abort_locks_for_thread");
 
   pthread_mutex_lock(&lock->mutex);

sql/lock.cc

@@ -331,7 +331,18 @@ void mysql_lock_abort(THD *thd, TABLE *table)
 }
 
 
-/* Abort one thread / table combination */
+/*
+  Abort one thread / table combination
+
+  SYNOPSIS
+    mysql_lock_abort_for_thread()
+    thd		Thread handler
+    table	Table that should be removed from lock queue
+
+  RETURN
+    0  Table was not locked by another thread
+    1  Table was locked by at least one other thread
+*/
 
 bool mysql_lock_abort_for_thread(THD *thd, TABLE *table)
 {
@@ -344,10 +355,9 @@ bool mysql_lock_abort_for_thread(THD *thd, TABLE *table)
   {
     for (uint i=0; i < locked->lock_count; i++)
     {
-      bool found;
-      found= thr_abort_locks_for_thread(locked->locks[i]->lock,
-	         			 table->in_use->real_id);
-      result|= found;
+      if (thr_abort_locks_for_thread(locked->locks[i]->lock,
+                                     table->in_use->real_id))
+        result= TRUE;
     }
     my_free((gptr) locked,MYF(0));
   }

sql/mysql_priv.h

@@ -606,12 +606,15 @@ bool rename_temporary_table(THD* thd, TABLE *table, const char *new_db,
 			    const char *table_name);
 void remove_db_from_cache(const my_string db);
 void flush_tables();
+
+/* bits for last argument to remove_table_from_cache() */
 #define RTFC_NO_FLAG                0x0000
 #define RTFC_OWNED_BY_THD_FLAG      0x0001
 #define RTFC_WAIT_OTHER_THREAD_FLAG 0x0002
 #define RTFC_CHECK_KILLED_FLAG      0x0004
 bool remove_table_from_cache(THD *thd, const char *db, const char *table,
                              uint flags);
+
 bool close_cached_tables(THD *thd, bool wait_for_refresh, TABLE_LIST *tables);
 void copy_field_from_tmp_record(Field *field,int offset);
 int fill_record(List<Item> &fields,List<Item> &values, bool ignore_errors);

sql/slave.cc

@@ -2719,9 +2719,9 @@ err:
   mi->abort_slave = 0; // TODO: check if this is needed
   DBUG_ASSERT(thd->net.buff != 0);
   net_end(&thd->net); // destructor will not free it, because net.vio is 0
+  close_thread_tables(thd, 0);
   pthread_mutex_lock(&LOCK_thread_count);
   THD_CHECK_SENTRY(thd);
-  close_thread_tables(thd);
   delete thd;
   pthread_mutex_unlock(&LOCK_thread_count);
   pthread_cond_broadcast(&mi->stop_cond);	// tell the world we are done

sql/sql_base.cc

@@ -2403,8 +2403,14 @@ void flush_tables()
 
 
 /*
-** Mark all entries with the table as deleted to force an reopen of the table
-** Returns true if the table is in use by another thread
+  Mark all entries with the table as deleted to force an reopen of the table
+
+  PREREQUISITES
+    Lock on LOCK_open()
+
+  RETURN
+    0 If the table is NOT in use by another thread
+    1 If the table is NOT in use by another thread
 */
 
 bool remove_table_from_cache(THD *thd, const char *db, const char *table_name,
@@ -2416,6 +2422,7 @@ bool remove_table_from_cache(THD *thd, const char *db, const char *table_name,
   bool result=0, signalled= 0;
   DBUG_ENTER("remove_table_from_cache");
 
+
   key_length=(uint) (strmov(strmov(key,db)+1,table_name)-key)+1;
   for (;;)
   {
@@ -2473,15 +2480,12 @@ bool remove_table_from_cache(THD *thd, const char *db, const char *table_name,
     {
       if (!(flags & RTFC_CHECK_KILLED_FLAG) || !thd->killed)
       {
+        dropping_tables++;
         if (likely(signalled))
-        {
-          dropping_tables++;
           (void) pthread_cond_wait(&COND_refresh, &LOCK_open);
-          dropping_tables--;
-          continue;
-        }
         else
         {
+          struct timespec abstime;
           /*
             It can happen that another thread has opened the
             table but has not yet locked any table at all. Since
@@ -2492,11 +2496,11 @@ bool remove_table_from_cache(THD *thd, const char *db, const char *table_name,
             and then we retry another loop in the
             remove_table_from_cache routine.
           */
-          pthread_mutex_unlock(&LOCK_open);
-          my_sleep(10);
-          pthread_mutex_lock(&LOCK_open);
-          continue;
+          set_timespec(abstime, 10);
+          pthread_cond_timedwait(&COND_refresh, &LOCK_open, &abstime);
         }
+        dropping_tables--;
+        continue;
       }
     }
     break;