From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Thu, 24 Feb 2022 04:30:37 +0000 (-0700)
Subject: Minor updates to ARKode in-code commentary.
X-Git-Tag: v9.4.0-rc1~437^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F13442%2Fhead;p=dealii.git

Minor updates to ARKode in-code commentary.
---

diff --git a/source/sundials/arkode.cc b/source/sundials/arkode.cc
index 5118490a36..c68e57abd7 100644
--- a/source/sundials/arkode.cc
+++ b/source/sundials/arkode.cc
@@ -448,6 +448,8 @@ namespace SUNDIALS
     while (!time.is_at_end())
       {
         time.set_desired_next_step_size(data.output_period);
+
+        // Let ARKode advance time by one period:
         double actual_next_time;
 #  if DEAL_II_SUNDIALS_VERSION_LT(4, 0, 0)
         const auto status = SundialsARKode(arkode_mem,
@@ -465,9 +467,12 @@ namespace SUNDIALS
         (void)status;
         AssertARKode(status);
 
+        // Then reflect this time advancement in our own DiscreteTime object:
         time.set_next_step_size(actual_next_time - time.get_current_time());
         time.advance_time();
 
+        // Finally check whether resets or output calls are desired at this
+        // time:
         while (solver_should_restart(time.get_current_time(), solution))
           reset(time.get_current_time(),
                 time.get_previous_step_size(),