-/*
- * Copyright (C) 1995, Index Data I/S
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: cfile.c,v $
- * Revision 1.11 1996-03-26 15:59:05 adam
- * The directory of the shadow table file can be specified by the new
- * bf_lockDir call.
- *
- * Revision 1.10 1996/02/07 14:03:46 adam
- * Work on flat indexed shadow files.
- *
- * Revision 1.9 1996/02/07 10:08:43 adam
- * Work on flat shadow (not finished yet).
- *
- * Revision 1.8 1995/12/15 12:36:52 adam
- * Moved hash file information to union.
- * Renamed commit files.
- *
- * Revision 1.7 1995/12/15 10:35:07 adam
- * Changed names of commit files.
- *
- * Revision 1.6 1995/12/11 09:03:53 adam
- * New function: cf_unlink.
- * New member of commit file head: state (0) deleted, (1) hash file.
- *
- * Revision 1.5 1995/12/08 16:21:14 adam
- * Work on commit/update.
- *
- * Revision 1.4 1995/12/01 16:24:28 adam
- * Commit files use separate meta file area.
- *
- * Revision 1.3 1995/12/01 11:37:22 adam
- * Cached/commit files implemented as meta-files.
- *
- * Revision 1.2 1995/11/30 17:00:49 adam
- * Several bug fixes. Commit system runs now.
- *
- * Revision 1.1 1995/11/30 08:33:11 adam
- * Started work on commit facility.
- *
- */
+/* $Id: cfile.c,v 1.27 2002-08-02 19:26:55 adam Exp $
+ Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002
+ Index Data Aps
+
+This file is part of the Zebra server.
+
+Zebra 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; either version 2, or (at your option) any later
+version.
+
+Zebra 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 Zebra; see the file LICENSE.zebra. If not, write to the
+Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.
+*/
+
+
#include <assert.h>
#include <stdlib.h>
#include <string.h>
-#include <alexutil.h>
+#include <zebrautl.h>
#include <mfile.h>
#include "cfile.h"
if (!tab)
return 0;
- while (left >= HASH_BSIZE)
+ while (left >= (int) HASH_BSIZE)
{
mf_write (cf->hash_mf, bno++, 0, 0, tab);
tab += HASH_BSIZE;
if (!tab)
return 0;
- while (left >= HASH_BSIZE)
+ while (left >= (int) HASH_BSIZE)
{
mf_read (cf->hash_mf, bno++, 0, 0, tab);
tab += HASH_BSIZE;
{
char path[1024];
int i;
- CFile cf = xmalloc (sizeof(*cf));
+ CFile cf = (CFile) xmalloc (sizeof(*cf));
int hash_bytes;
cf->rmf = mf;
+ logf (LOG_DEBUG, "cf: open %s %s", cf->rmf->name, wflag ? "rdwr" : "rd");
sprintf (path, "%s-b", fname);
if (!(cf->block_mf = mf_open (area, path, block_size, wflag)))
{
cf->head.next_block = 1;
if (wflag)
mf_write (cf->hash_mf, 0, 0, sizeof(cf->head), &cf->head);
- cf->array = xmalloc (hash_bytes);
+ cf->array = (int *) xmalloc (hash_bytes);
for (i = 0; i<cf->head.hash_size; i++)
cf->array[i] = 0;
if (wflag)
assert (cf->head.hash_size > 2);
hash_bytes = cf->head.hash_size * sizeof(int);
assert (cf->head.next_bucket > 0);
+ assert (cf->head.next_block > 0);
if (cf->head.state == 1)
- cf->array = xmalloc (hash_bytes);
+ cf->array = (int *) xmalloc (hash_bytes);
else
cf->array = NULL;
read_head (cf);
}
if (cf->head.state == 1)
{
- cf->parray = xmalloc (cf->head.hash_size * sizeof(*cf->parray));
+ cf->parray = (struct CFile_hash_bucket **)
+ xmalloc (cf->head.hash_size * sizeof(*cf->parray));
for (i = 0; i<cf->head.hash_size; i++)
cf->parray[i] = NULL;
}
cf->bucket_in_memory = 0;
cf->max_bucket_in_memory = 100;
cf->dirty = 0;
- cf->iobuf = xmalloc (cf->head.block_size);
+ cf->iobuf = (char *) xmalloc (cf->head.block_size);
memset (cf->iobuf, 0, cf->head.block_size);
cf->no_hits = 0;
cf->no_miss = 0;
+ zebra_mutex_init (&cf->mutex);
return cf;
}
flush_bucket (cf, 1);
assert (cf->bucket_in_memory < cf->max_bucket_in_memory);
++(cf->bucket_in_memory);
- p = xmalloc (sizeof(*p));
+ p = (struct CFile_hash_bucket *) xmalloc (sizeof(*p));
p->lru_next = NULL;
p->lru_prev = cf->bucket_lru_front;
return p;
}
-static struct CFile_hash_bucket *new_bucket (CFile cf, int *block_no, int hno)
+static struct CFile_hash_bucket *new_bucket (CFile cf, int *block_nop, int hno)
{
struct CFile_hash_bucket *p;
- int i;
+ int i, block_no;
- *block_no = cf->head.next_bucket++;
- p = alloc_bucket (cf, *block_no, hno);
+ block_no = *block_nop = cf->head.next_bucket++;
+ p = alloc_bucket (cf, block_no, hno);
for (i = 0; i<HASH_BUCKET; i++)
{
p->ph.no[i] = 0;
}
p->ph.next_bucket = 0;
- p->ph.this_bucket = *block_no;
+ p->ph.this_bucket = block_no;
p->dirty = 1;
return p;
}
static int cf_lookup_flat (CFile cf, int no)
{
int hno = (no*sizeof(int))/HASH_BSIZE;
- int off = (no*sizeof(int)) - hno*sizeof(HASH_BSIZE);
+ int off = (no*sizeof(int)) - hno*HASH_BSIZE;
int vno = 0;
mf_read (cf->hash_mf, hno+cf->head.next_bucket, off, sizeof(int), &vno);
}
if (hb)
continue;
+#if 0
+ /* extra check ... */
+ for (hb = cf->bucket_lru_back; hb; hb = hb->lru_next)
+ {
+ if (hb->ph.this_bucket == block_no)
+ {
+ logf (LOG_FATAL, "Found hash bucket on other chain (1)");
+ abort ();
+ }
+ for (i = 0; i<HASH_BUCKET && hb->ph.vno[i]; i++)
+ if (hb->ph.no[i] == no)
+ {
+ logf (LOG_FATAL, "Found hash bucket on other chain (2)");
+ abort ();
+ }
+ }
+#endif
(cf->no_miss)++;
hb = get_bucket (cf, block_no, hno);
for (i = 0; i<HASH_BUCKET && hb->ph.vno[i]; i++)
static void cf_write_flat (CFile cf, int no, int vno)
{
int hno = (no*sizeof(int))/HASH_BSIZE;
- int off = (no*sizeof(int)) - hno*sizeof(HASH_BSIZE);
+ int off = (no*sizeof(int)) - hno*HASH_BSIZE;
hno += cf->head.next_bucket;
if (hno >= cf->head.flat_bucket)
cf->head.flat_bucket = hno+1;
+ cf->dirty = 1;
mf_write (cf->hash_mf, hno, off, sizeof(int), &vno);
}
struct CFile_hash_bucket *p;
int i, j;
- logf (LOG_LOG, "Moving to flat shadow: %s", cf->rmf->name);
- logf (LOG_LOG, "hits=%d miss=%d bucket_in_memory=%d total=%d",
+ logf (LOG_DEBUG, "cf: Moving to flat shadow: %s", cf->rmf->name);
+ logf (LOG_DEBUG, "cf: hits=%d miss=%d bucket_in_memory=%d total=%d",
cf->no_hits, cf->no_miss, cf->bucket_in_memory,
cf->head.next_bucket - cf->head.first_bucket);
assert (cf->head.state == 1);
flush_bucket (cf, -1);
assert (cf->bucket_in_memory == 0);
- p = xmalloc (sizeof(*p));
+ p = (struct CFile_hash_bucket *) xmalloc (sizeof(*p));
for (i = cf->head.first_bucket; i < cf->head.next_bucket; i++)
{
if (!mf_read (cf->hash_mf, i, 0, 0, &p->ph))
xfree (cf->parray);
cf->parray = NULL;
cf->head.state = 2;
+ cf->dirty = 1;
}
static int cf_lookup (CFile cf, int no)
}
if (hb)
continue;
+
+#if 0
+ /* extra check ... */
+ for (hb = cf->bucket_lru_back; hb; hb = hb->lru_next)
+ {
+ if (hb->ph.this_bucket == *bucketpp)
+ {
+ logf (LOG_FATAL, "Found hash bucket on other chain");
+ abort ();
+ }
+ }
+#endif
(cf->no_miss)++;
hb = get_bucket (cf, *bucketpp, hno);
assert (hb);
{
if (cf->head.state > 1)
return cf_new_flat (cf, no);
- if (cf->no_miss*5 > cf->no_hits)
+ if (cf->no_miss*2 > cf->no_hits)
{
cf_moveto_flat (cf);
assert (cf->head.state > 1);
}
-int cf_read (CFile cf, int no, int offset, int num, void *buf)
+int cf_read (CFile cf, int no, int offset, int nbytes, void *buf)
{
int block;
assert (cf);
+ zebra_mutex_lock (&cf->mutex);
if (!(block = cf_lookup (cf, no)))
+ {
+ zebra_mutex_unlock (&cf->mutex);
return -1;
- if (!mf_read (cf->block_mf, block, offset, num, buf))
+ }
+ zebra_mutex_unlock (&cf->mutex);
+ if (!mf_read (cf->block_mf, block, offset, nbytes, buf))
{
logf (LOG_FATAL|LOG_ERRNO, "cf_read no=%d, block=%d", no, block);
exit (1);
return 1;
}
-int cf_write (CFile cf, int no, int offset, int num, const void *buf)
+int cf_write (CFile cf, int no, int offset, int nbytes, const void *buf)
{
int block;
assert (cf);
+ zebra_mutex_lock (&cf->mutex);
if (!(block = cf_lookup (cf, no)))
{
block = cf_new (cf, no);
- if (offset || num)
+ if (offset || nbytes)
{
mf_read (cf->rmf, no, 0, 0, cf->iobuf);
- memcpy (cf->iobuf + offset, buf, num);
+ memcpy (cf->iobuf + offset, buf, nbytes);
buf = cf->iobuf;
offset = 0;
- num = 0;
+ nbytes = 0;
}
}
- if (mf_write (cf->block_mf, block, offset, num, buf))
+ zebra_mutex_unlock (&cf->mutex);
+ if (mf_write (cf->block_mf, block, offset, nbytes, buf))
{
logf (LOG_FATAL|LOG_ERRNO, "cf_write no=%d, block=%d", no, block);
exit (1);
int cf_close (CFile cf)
{
- logf (LOG_LOG, "cf_close");
- logf (LOG_LOG, "hits=%d miss=%d bucket_in_memory=%d total=%d",
+ logf (LOG_DEBUG, "cf: close hits=%d miss=%d bucket_in_memory=%d total=%d",
cf->no_hits, cf->no_miss, cf->bucket_in_memory,
cf->head.next_bucket - cf->head.first_bucket);
flush_bucket (cf, -1);
xfree (cf->array);
xfree (cf->parray);
xfree (cf->iobuf);
+ zebra_mutex_destroy (&cf->mutex);
xfree (cf);
return 0;
}
projects / idzebra-moved-to-github.git / blobdiff