Merge with 4.0.21

BitKeeper/etc/logging_ok:
  auto-union
Build-tools/mysql-copyright-2:
  Auto merged
include/violite.h:
  Auto merged
innobase/btr/btr0btr.c:
  Auto merged
innobase/buf/buf0buf.c:
  Auto merged
innobase/buf/buf0flu.c:
  Auto merged
innobase/buf/buf0lru.c:
  Auto merged
innobase/dict/dict0dict.c:
  Auto merged
innobase/dict/dict0mem.c:
  Auto merged
innobase/fsp/fsp0fsp.c:
  Auto merged
innobase/fut/fut0lst.c:
  Auto merged
innobase/ha/hash0hash.c:
  Auto merged
innobase/include/buf0buf.ic:
  Auto merged
innobase/include/buf0lru.h:
  Auto merged
innobase/include/data0data.h:
  Auto merged
innobase/include/dict0dict.h:
  Auto merged
innobase/include/dict0mem.h:
  Auto merged
innobase/include/fsp0fsp.h:
  Auto merged
innobase/include/hash0hash.h:
  Auto merged
innobase/include/lock0lock.h:
  Auto merged
innobase/include/log0log.h:
  Auto merged
innobase/include/log0log.ic:
  Auto merged
innobase/include/mem0dbg.ic:
  Auto merged
innobase/include/mem0pool.h:
  Auto merged
innobase/include/mtr0mtr.h:
  Auto merged
innobase/include/sync0rw.h:
  Auto merged
innobase/include/sync0sync.h:
  Auto merged
innobase/include/trx0roll.h:
  Auto merged
innobase/include/trx0trx.h:
  Auto merged
innobase/include/ut0mem.h:
  Auto merged
innobase/lock/lock0lock.c:
  Auto merged
innobase/log/log0log.c:
  Auto merged
innobase/mem/mem0dbg.c:
  Auto merged
innobase/mem/mem0pool.c:
  Auto merged
innobase/mtr/mtr0mtr.c:
  Auto merged
innobase/pars/lexyy.c:
  Auto merged
innobase/pars/pars0opt.c:
  Auto merged
innobase/que/que0que.c:
  Auto merged
innobase/rem/rem0cmp.c:
  Auto merged
innobase/row/row0ins.c:
  Auto merged
innobase/row/row0mysql.c:
  Auto merged
innobase/row/row0upd.c:
  Auto merged
innobase/srv/srv0srv.c:
  Auto merged
innobase/srv/srv0start.c:
  Auto merged
innobase/sync/sync0rw.c:
  Auto merged
innobase/sync/sync0sync.c:
  Auto merged
innobase/thr/thr0loc.c:
  Auto merged
innobase/trx/trx0purge.c:
  Auto merged
innobase/trx/trx0roll.c:
  Auto merged
innobase/trx/trx0sys.c:
  Auto merged
innobase/trx/trx0trx.c:
  Auto merged
innobase/usr/usr0sess.c:
  Auto merged
innobase/ut/ut0mem.c:
  Auto merged
mysql-test/r/func_if.result:
  Auto merged
mysql-test/r/type_date.result:
  Auto merged
mysql-test/t/type_date.test:
  Auto merged
mysql-test/t/type_decimal.test:
  Auto merged
mysys/mf_tempfile.c:
  Auto merged
netware/BUILD/nwbootstrap:
  Auto merged
netware/Makefile.am:
  Auto merged
scripts/mysqld_safe.sh:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
mysql-test/t/func_if.test:
  Auto merged
sql/mysqld.cc:
  Auto merged
sql/opt_range.cc:
  Auto merged
sql/sql_acl.cc:
  Auto merged
sql/sql_parse.cc:
  Auto merged
support-files/my-innodb-heavy-4G.cnf.sh:
  Auto merged
Build-tools/Do-compile:
  Merge with 4.0
Build-tools/mysql-copyright:
  Merge with 4.0
client/mysqltest.c:
  Merge with 4.0
include/my_global.h:
  Merge with 4.0
innobase/buf/buf0rea.c:
  Merge with 4.0
innobase/data/data0type.c:
  Merge with 4.0
innobase/ibuf/ibuf0ibuf.c:
  Merge with 4.0
innobase/include/buf0buf.h:
  Merge with 4.0
innobase/include/data0type.h:
  Merge with 4.0
innobase/include/mem0mem.h:
  Merge with 4.0
innobase/include/mem0mem.ic:
  Merge with 4.0
innobase/log/log0recv.c:
  Merge with 4.0
libmysql/libmysql.c:
  Merge with 4.0
libmysqld/Makefile.am:
  Merge with 4.0
mysql-test/r/range.result:
  Merge with 4.0
mysql-test/r/type_decimal.result:
  Merge with 4.0
mysql-test/t/range.test:
  Merge with 4.0
netware/BUILD/mwenv:
  Merge with 4.0
netware/mysql_test_run.c:
  Merge with 4.0
scripts/mysql_install_db.sh:
  Merge with 4.0
sql/field.cc:
  Merge with 4.0
sql/field.h:
  Merge with 4.0
sql/item_cmpfunc.h:
  Merge with 4.0
support-files/my-huge.cnf.sh:
  Merge with 4.0
support-files/my-large.cnf.sh:
  Merge with 4.0
support-files/my-medium.cnf.sh:
  Merge with 4.0
support-files/my-small.cnf.sh:
  Merge with 4.0
support-files/mysql.spec.sh:
  Merge with 4.0

1 files changed, 22 insertions, 9 deletions

diff --git a/innobase/include/trx0trx.h b/innobase/include/trx0trx.h
index 9b7ac22e617..a8c1df534da 100644
--- a/innobase/include/trx0trx.h
+++ b/innobase/include/trx0trx.h
@@ -194,10 +194,9 @@ trx_end_lock_wait(
 /********************************************************************
 Sends a signal to a trx object. */
 
-que_thr_t*
+ibool
 trx_sig_send(
 /*=========*/
-					/* out: next query thread to run */
 					/* out: TRUE if the signal was
 					successfully delivered */
 	trx_t*		trx,		/* in: trx handle */
@@ -207,17 +206,27 @@ trx_sig_send(
 	que_thr_t*	receiver_thr,	/* in: query thread which wants the
 					reply, or NULL; if type is
 					TRX_SIG_END_WAIT, this must be NULL */
-	trx_savept_t* 	savept);	/* in: possible rollback savepoint, or
+	trx_savept_t* 	savept,		/* in: possible rollback savepoint, or
 					NULL */
+	que_thr_t**	next_thr);	/* in/out: next query thread to run;
+					if the value which is passed in is
+					a pointer to a NULL pointer, then the
+					calling function can start running
+					a new query thread; if the parameter
+					is NULL, it is ignored */
 /********************************************************************
 Send the reply message when a signal in the queue of the trx has
 been handled. */
 
-que_thr_t*
+void
 trx_sig_reply(
 /*==========*/
-					/* out: next query thread to run */
-	trx_sig_t*	sig);		/* in: signal */
+	trx_sig_t*	sig,		/* in: signal */
+	que_thr_t**	next_thr);	/* in/out: next query thread to run;
+					if the value which is passed in is
+					a pointer to a NULL pointer, then the
+					calling function can start running
+					a new query thread */
 /********************************************************************
 Removes the signal object from a trx signal queue. */
 
@@ -229,11 +238,15 @@ trx_sig_remove(
 /********************************************************************
 Starts handling of a trx signal. */
 
-que_thr_t*
+void
 trx_sig_start_handle(
 /*=================*/
-				/* out: next query thread to run, or NULL */
-	trx_t*		trx);	/* in: trx handle */
+	trx_t*		trx,		/* in: trx handle */
+	que_thr_t**	next_thr);	/* in/out: next query thread to run;
+					if the value which is passed in is
+					a pointer to a NULL pointer, then the
+					calling function can start running
+					a new query thread */
 /********************************************************************
 Ends signal handling. If the session is in the error state, and
 trx->graph_before_signal_handling != NULL, returns control to the error