branches/zip: rb://53

Final version of rb://53, fixes the styling of a comment, makes
the definition and the declaration of thd_supports_xa() identical commentwise.

handler/ha_innodb.cc

@@ -608,7 +608,8 @@ thd_is_select(
 }
 
 /**********************************************************************
-Returns true if the thread has XA support. */
+Returns true if the thread supports XA,
+global value of innodb_supports_xa if thd is NULL. */
 extern "C" UNIV_INTERN
 ibool
 thd_supports_xa(

include/ha_prototypes.h

@@ -214,7 +214,8 @@ ibool
 thd_supports_xa(
 /*============*/
 			/* out: true if thd supports XA */
-	void*	thd);	/* in: thread handle (THD*) */
+	void*	thd);	/* in: thread handle (THD*), or NULL to query
+			the global innodb_supports_xa */
 
 /**********************************************************************
 Returns true if the thread is executing in innodb_strict_mode. */

trx/trx0trx.c

@@ -699,8 +699,7 @@ trx_start(
 	from thd so any changes in the value take effect in the next
 	transaction. This is to avoid a scenario where some undo
 	generated by a transaction, has XA stuff, and other undo,
-	generated by the same transaction, doesn't
-	*/
+	generated by the same transaction, doesn't. */
 	trx->support_xa = thd_supports_xa(trx->mysql_thd);
 
 	mutex_enter(&kernel_mutex);