BUG#35542 Add option to sync master and relay log to disk after every event

BUG#31665 sync_binlog should cause relay logs to be synchronized

NOTE: Backporting the patch to next-mr.
      
Add sync_relay_log option to server, this option works for relay log 
the same as option sync_binlog for binlog. This option also synchronize
master info to disk when set to non-zero value.
            
Original patches from Sinisa and Mark, with some modifications

1 files changed, 17 insertions, 0 deletions

diff --git a/sql/set_var.cc b/sql/set_var.cc
index 5025356230c..f2b5201cf8b 100644
--- a/sql/set_var.cc
+++ b/sql/set_var.cc
@@ -1534,6 +1534,23 @@ static bool get_unsigned(THD *thd, set_var *var, ulonglong user_max,
 }
 
 
+bool sys_var_int_ptr::check(THD *thd, set_var *var)
+{
+  var->save_result.ulong_value= (ulong) var->value->val_int();
+  return 0;
+}
+
+bool sys_var_int_ptr::update(THD *thd, set_var *var)
+{
+  *value= (uint) var->save_result.ulong_value;
+  return 0;
+}
+
+void sys_var_int_ptr::set_default(THD *thd, enum_var_type type)
+{
+  *value= (uint) option_limits->def_value;
+}
+
 sys_var_long_ptr::
 sys_var_long_ptr(sys_var_chain *chain, const char *name_arg, ulong *value_ptr_arg,
                  sys_after_update_func after_update_arg)