From cd0851b03d3adebdd32ea4c95cde4f9f0489130c Mon Sep 17 00:00:00 2001
From: tradke <tradke@ebee0441-1374-4afa-a3b5-247f3ba15b9a>
Date: Fri, 10 Jun 2005 11:57:51 +0000
Subject: Added necessary logic to implement IO::checkpoint_keep as steerable
 parameter.

git-svn-id: http://svn.cactuscode.org/arrangements/CactusPUGHIO/IOFlexIO/trunk@336 ebee0441-1374-4afa-a3b5-247f3ba15b9a
---
 src/DumpGH.c   | 35 +++++++++++++++++++++--------------
 src/Startup.c  |  4 ++++
 src/ioFlexGH.h |  5 +++++
 3 files changed, 30 insertions(+), 14 deletions(-)

diff --git a/src/DumpGH.c b/src/DumpGH.c
index 3b75071..21d1af0 100644
--- a/src/DumpGH.c
+++ b/src/DumpGH.c
@@ -324,8 +324,6 @@ static int Checkpoint (const cGH *GH, int called_from)
   flexioGH *myGH;
   const ioGH *ioUtilGH;
   char *filename, *tempname, *fullname;
-  static char **cp_filenames = NULL;
-  static int cp_fileindex = 0;
   const char *timer_descriptions[] = {"Time to dump parameters: ",
                                       "Time to dump datasets:   ",
                                       "Total time to checkpoint:"};
@@ -334,12 +332,6 @@ static int Checkpoint (const cGH *GH, int called_from)
 
   retval = 0;
 
-  /* allocate the ring buffer for checkpoint filenames */
-  if (! cp_filenames)
-  {
-    cp_filenames = calloc (abs (checkpoint_keep), sizeof (char *));
-  }
-
   /* start the total timer */
   myGH = CCTK_GHExtension (GH, "IOFlexIO");
   if (myGH->print_timing_info)
@@ -522,16 +514,31 @@ static int Checkpoint (const cGH *GH, int called_from)
 
   /* delete the oldest dumpfile if checkpoint_keep_all isn't set
      and put the new filename into the ring buffer */
-  if (cp_filenames[cp_fileindex])
+  if (checkpoint_keep > 0)
   {
-    if (checkpoint_keep > 0)
+    if (myGH->cp_filenames[myGH->cp_fileindex])
+    {
+      remove (myGH->cp_filenames[myGH->cp_fileindex]);
+      free (myGH->cp_filenames[myGH->cp_fileindex]);
+      myGH->cp_filenames[myGH->cp_fileindex] = NULL;
+    }
+
+    myGH->cp_filenames[myGH->cp_fileindex] = strdup (filename);
+    myGH->cp_fileindex = (myGH->cp_fileindex+1) % checkpoint_keep;
+    if (myGH->checkpoint_keep != checkpoint_keep)
     {
-      remove (cp_filenames[cp_fileindex]);
+      char **cp_filenames = calloc (checkpoint_keep, sizeof (char *));
+      int min = myGH->checkpoint_keep < checkpoint_keep ?
+                myGH->checkpoint_keep : checkpoint_keep;
+      while (min-- > 0)
+      {
+        cp_filenames[min] = myGH->cp_filenames[min];
+      }
+      free (myGH->cp_filenames);
+      myGH->cp_filenames = cp_filenames;
+      myGH->checkpoint_keep = checkpoint_keep;
     }
-    free (cp_filenames[cp_fileindex]);
   }
-  cp_filenames[cp_fileindex] = strdup (filename);
-  cp_fileindex = (cp_fileindex + 1) % abs (checkpoint_keep);
 
   /* stop total checkpoint timer and print timing info */
   if (myGH->print_timing_info)
diff --git a/src/Startup.c b/src/Startup.c
index 9861f3e..7443f41 100644
--- a/src/Startup.c
+++ b/src/Startup.c
@@ -252,6 +252,10 @@ static void *SetupGH (tFleshConfig *config, int conv_level, cGH *GH)
   myGH->out_last = malloc (numvars * sizeof (int));
   myGH->out2D_last = malloc (numvars * sizeof (int));
 
+  myGH->cp_fileindex = 0;
+  myGH->checkpoint_keep = abs (checkpoint_keep);
+  myGH->cp_filenames = calloc (myGH->checkpoint_keep, sizeof (char *));
+
   myGH->out_vars = strdup ("");
   myGH->out_every_default = out_every - 1;
   myGH->out2D_vars = strdup ("");
diff --git a/src/ioFlexGH.h b/src/ioFlexGH.h
index a772233..99cd945 100644
--- a/src/ioFlexGH.h
+++ b/src/ioFlexGH.h
@@ -141,6 +141,11 @@ typedef struct IOFlexIOGH
   /* 2D slices */
   int **sp2xyz;
 
+  /* ring buffer for list of successfully created cp files */
+  int    checkpoint_keep;
+  int    cp_fileindex;
+  char **cp_filenames;
+
   /* iteration number of the last checkpoint */
   int last_checkpoint_iteration;
 
-- 
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