Changed logging a bit.

[idzebra-moved-to-github.git] / bfile / commit.c

diff --git a/bfile/commit.c b/bfile/commit.c
index 216825c..547df66 100644 (file)
--- a/bfile/commit.c
+++ b/bfile/commit.c
@@ -4,63 +4,142 @@
  * Sebastian Hammer, Adam Dickmeiss
  *
  * $Log: commit.c,v $
- * Revision 1.1  1995-11-30 08:33:13  adam
+ * Revision 1.10  1996-04-18 16:02:56  adam
+ * Changed logging a bit.
+ * Removed warning message when commiting flat shadow files.
+ *
+ * Revision 1.9  1996/04/12  07:01:57  adam
+ * Yet another bug fix (next_block was initialized to 0; now set to 1).
+ *
+ * Revision 1.8  1996/02/07 14:03:49  adam
+ * Work on flat indexed shadow files.
+ *
+ * Revision 1.7  1996/02/07  10:08:46  adam
+ * Work on flat shadow (not finished yet).
+ *
+ * Revision 1.6  1995/12/15  12:36:53  adam
+ * Moved hash file information to union.
+ * Renamed commit files.
+ *
+ * Revision 1.5  1995/12/12  15:57:55  adam
+ * Implemented mf_unlink. cf_unlink uses mf_unlink.
+ *
+ * Revision 1.4  1995/12/11  09:03:55  adam
+ * New function: cf_unlink.
+ * New member of commit file head: state (0) deleted, (1) hash file.
+ *
+ * Revision 1.3  1995/12/01  16:24:29  adam
+ * Commit files use separate meta file area.
+ *
+ * Revision 1.2  1995/12/01  11:37:24  adam
+ * Cached/commit files implemented as meta-files.
+ *
+ * Revision 1.1  1995/11/30  08:33:13  adam
  * Started work on commit facility.
  *
  */
 
 #include <assert.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <alexutil.h>
+#include <stdlib.h>
 
+#include <alexutil.h>
 #include <mfile.h>
 #include "cfile.h"
 
-void cf_commit (CFile cf)
+void cf_unlink (CFile cf)
 {
-    int i, r, bucket_no;
-    int hash_bytes;
-    struct CFile_ph_bucket *p;
-
     if (cf->bucket_in_memory)
     {
-        logf (LOG_FATAL, "Cannot commit potential dirty cache");
+        logf (LOG_FATAL, "Cannot unlink potential dirty cache");
         exit (1);
     }
+    cf->head.state = 0;
+    cf->dirty = 1;
+    mf_unlink (cf->block_mf);
+    mf_unlink (cf->hash_mf);
+}
+
+   
+static void cf_commit_hash (CFile cf)
+{ 
+    int i, bucket_no;
+    int hash_bytes;
+    struct CFile_ph_bucket *p;
+
     p = xmalloc (sizeof(*p));
     hash_bytes = cf->head.hash_size * sizeof(int);
-    bucket_no = (hash_bytes+sizeof(cf->head))/HASH_BSIZE + 2;
-    if (lseek (cf->hash_fd, bucket_no * HASH_BSIZE, SEEK_SET) < 0)
-    {
-        logf (LOG_FATAL|LOG_ERRNO, "seek commit");
-        exit (1);
-    }
+    bucket_no = cf->head.first_bucket;
     for (; bucket_no < cf->head.next_bucket; bucket_no++)
     {
-        r = read (cf->hash_fd, p, HASH_BSIZE);
-        if (r != HASH_BSIZE)
+        if (!mf_read (cf->hash_mf, bucket_no, 0, 0, p))
         {
             logf (LOG_FATAL, "read commit hash");
             exit (1);
         }
         for (i = 0; i<HASH_BUCKET && p->vno[i]; i++)
         {
-            if (lseek (cf->block_fd, p->vno[i]*cf->head.block_size,
-                SEEK_SET) < 0)
-            {
-                logf (LOG_FATAL, "lseek commit block");
-                exit (1);
-            }
-            r = read (cf->block_fd, cf->iobuf, cf->head.block_size);
-            if (r != cf->head.block_size)
+            if (!mf_read (cf->block_mf, p->vno[i], 0, 0, cf->iobuf))
             {
                 logf (LOG_FATAL, "read commit block");
                 exit (1);
             }
-            mf_write (cf->mf, p->no[i], 0, 0, cf->iobuf);
+            mf_write (cf->rmf, p->no[i], 0, 0, cf->iobuf);
         }
     }
     xfree (p);
 }
 
+static void cf_commit_flat (CFile cf)
+{
+    int *fp;
+    int hno;
+    int i, vno = 0;
+
+    fp = xmalloc (HASH_BSIZE);
+    for (hno = cf->head.next_bucket; hno < cf->head.flat_bucket; hno++)
+    {
+        if (hno == cf->head.flat_bucket-1)
+        {
+            for (i = 0; i < (HASH_BSIZE/sizeof(int)); i++)
+                fp[i] = 0;
+        }
+        if (!mf_read (cf->hash_mf, hno, 0, 0, fp) &&
+            hno != cf->head.flat_bucket-1)
+        {
+            logf (LOG_FATAL, "read index block hno=%d (%d-%d) commit",
+                  hno, cf->head.next_bucket, cf->head.flat_bucket-1);
+        }
+        for (i = 0; i < (HASH_BSIZE/sizeof(int)); i++)
+        {
+            if (fp[i])
+            {
+                if (!mf_read (cf->block_mf, fp[i], 0, 0, cf->iobuf))
+                {
+                    logf (LOG_FATAL, "read data block hno=%d (%d-%d) "
+                                     "i=%d commit block at %d (->%d)",
+                          hno, cf->head.next_bucket, cf->head.flat_bucket-1,
+                          i, fp[i], vno);
+                    exit (1);
+                }
+                mf_write (cf->rmf, vno, 0, 0, cf->iobuf);
+            }
+            vno++;
+        }
+    }
+    xfree (fp);
+}
+
+void cf_commit (CFile cf)
+{
+
+    if (cf->bucket_in_memory)
+    {
+        logf (LOG_FATAL, "Cannot commit potential dirty cache");
+        exit (1);
+    }
+    if (cf->head.state == 1)
+        cf_commit_hash (cf);
+    else if (cf->head.state == 2)
+        cf_commit_flat (cf);
+}
+