Merge dator6.(none):/home/mikael/mysql_clones/mysql-5.1-ndb

into  dator6.(none):/home/mikael/mysql_clones/bug30996

storage/ndb/include/util/ndb_rand.h

+/* Copyright (C) 2003 MySQL 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; version 2 of the License.
+
+   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 */
+
+#ifndef NDB_RAND_H
+#define NDB_RAND_H
+
+#define NDB_RAND_MAX 32767
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int ndb_rand(void);
+
+void ndb_srand(unsigned seed);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

storage/ndb/src/common/util/Makefile.am

@@ -24,7 +24,8 @@ libgeneral_la_SOURCES = \
             uucode.c random.c version.c \
             strdup.c \
             ConfigValues.cpp ndb_init.c basestring_vsnprintf.c \
-            Bitmask.cpp
+            Bitmask.cpp \
+	    ndb_rand.c
 
 EXTRA_PROGRAMS = testBitmask
 testBitmask_SOURCES =  testBitmask.cpp

storage/ndb/src/common/util/ndb_rand.c

+/* Copyright (C) 2003 MySQL 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; version 2 of the License.
+
+   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 */
+
+#include <ndb_rand.h>
+
+static unsigned long next= 1;
+
+/**
+ * ndb_rand
+ *
+ * constant time, cheap, pseudo-random number generator.
+ *
+ * NDB_RAND_MAX assumed to be 32767
+ *
+ * This is the POSIX example for "generating the same sequence on
+ * different machines". Although that is not one of our requirements.
+ */
+int ndb_rand(void)
+{
+  next= next * 1103515245 + 12345;
+  return((unsigned)(next/65536) % 32768);
+}
+
+void ndb_srand(unsigned seed)
+{
+  next= seed;
+}
+

storage/ndb/src/kernel/blocks/dbtc/DbtcMain.cpp

@@ -20,6 +20,7 @@
 #include <RefConvert.hpp>
 #include <ndb_limits.h>
 #include <my_sys.h>
+#include <ndb_rand.h>
 
 #include <signaldata/EventReport.hpp>
 #include <signaldata/TcKeyReq.hpp>
@@ -6278,7 +6279,8 @@ void Dbtc::timeOutLoopStartLab(Signal* signal, Uint32 api_con_ptr)
     jam();
     if (api_timer != 0) {
       Uint32 error= ZTIME_OUT_ERROR;
-      time_out_value= time_out_param + (api_con_ptr & mask_value);
+      time_out_value= time_out_param + (ndb_rand() & mask_value);
+      ndbout_c("timeout value: %u %u",time_out_value, time_out_value-time_out_param);
       if (unlikely(old_mask_value)) // abort during single user mode
       {
         apiConnectptr.i = api_con_ptr;