-/*
- * Copyright (C) 1994, Index Data I/S
- * All rights reserved.
- * Sebastian Hammer, Adam Dickmeiss
- *
- * $Log: bfile.c,v $
- * Revision 1.10 1994-08-25 10:15:54 quinn
- * Trivial
- *
- * Revision 1.9 1994/08/24 08:45:48 quinn
- * Using mfile.
- *
- * Revision 1.8 1994/08/23 15:03:34 quinn
- * *** empty log message ***
- *
- * Revision 1.7 1994/08/23 14:25:45 quinn
- * Added O_CREAT because some geek wanted it. Sheesh.
- *
- * Revision 1.6 1994/08/23 14:21:38 quinn
- * Fixed call to log
- *
- * Revision 1.5 1994/08/18 08:10:08 quinn
- * Minimal changes
- *
- * Revision 1.4 1994/08/17 14:27:32 quinn
- * last mods
- *
- * Revision 1.2 1994/08/17 14:09:32 quinn
- * Compiles cleanly (still only dummy).
- *
- * Revision 1.1 1994/08/17 13:55:08 quinn
- * New blocksystem. dummy only
- *
- */
-
-#include <util.h>
-#include <bfile.h>
-#include <sys/types.h>
-#include <fcntl.h>
-#include <unistd.h>
+/* $Id: bfile.c,v 1.35 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 <stdio.h>
#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#ifdef WIN32
+#include <io.h>
+#else
+#include <unistd.h>
+#endif
+
+#include <zebrautl.h>
+#include <bfile.h>
+#include "cfile.h"
+
+struct BFiles_struct {
+ MFile_area commit_area;
+ MFile_area_struct *register_area;
+ char *base;
+ char *cache_fname;
+};
+
+BFiles bfs_create (const char *spec, const char *base)
+{
+ BFiles bfs = (BFiles) xmalloc (sizeof(*bfs));
+ bfs->commit_area = NULL;
+ bfs->base = 0;
+ bfs->cache_fname = 0;
+ if (base)
+ bfs->base = xstrdup (base);
+ bfs->register_area = mf_init("register", spec, base);
+ if (!bfs->register_area)
+ {
+ bfs_destroy(bfs);
+ return 0;
+ }
+ return bfs;
+}
+
+void bfs_destroy (BFiles bfs)
+{
+ if (!bfs)
+ return;
+ xfree (bfs->cache_fname);
+ xfree (bfs->base);
+ mf_destroy (bfs->commit_area);
+ mf_destroy (bfs->register_area);
+ xfree (bfs);
+}
+
+static FILE *open_cache (BFiles bfs, const char *flags)
+{
+ FILE *file;
+
+ file = fopen (bfs->cache_fname, flags);
+ return file;
+}
+
+static void unlink_cache (BFiles bfs)
+{
+ unlink (bfs->cache_fname);
+}
+
+void bf_cache (BFiles bfs, const char *spec)
+{
+ if (spec)
+ {
+ yaz_log (LOG_LOG, "enabling cache spec=%s", spec);
+ if (!bfs->commit_area)
+ bfs->commit_area = mf_init ("shadow", spec, bfs->base);
+ if (bfs->commit_area)
+ {
+ bfs->cache_fname = xmalloc (strlen(bfs->commit_area->dirs->name)+
+ 8);
+ strcpy (bfs->cache_fname, bfs->commit_area->dirs->name);
+ strcat (bfs->cache_fname, "/cache");
+ yaz_log (LOG_LOG, "cache_fname = %s", bfs->cache_fname);
+ }
+ }
+ else
+ bfs->commit_area = NULL;
+}
int bf_close (BFile bf)
{
- mf_close(bf->mf);
- xfree(bf);
- return(0);
+ zebra_lock_rdwr_destroy (&bf->rdwr_lock);
+ if (bf->cf)
+ cf_close (bf->cf);
+ mf_close (bf->mf);
+ xfree (bf);
+ return 0;
}
-BFile bf_open (const char *name, int block_size, int wflag)
+BFile bf_open (BFiles bfs, const char *name, int block_size, int wflag)
{
- BFile tmp = xmalloc(sizeof(BFile_struct));
+ BFile tmp = (BFile) xmalloc(sizeof(BFile_struct));
+
+ if (bfs->commit_area)
+ {
+ int first_time;
- if (!(tmp->mf = mf_open(0, name, block_size, wflag)))
+ tmp->mf = mf_open (bfs->register_area, name, block_size, 0);
+ tmp->cf = cf_open (tmp->mf, bfs->commit_area, name, block_size,
+ wflag, &first_time);
+ if (first_time)
+ {
+ FILE *outf;
+
+ outf = open_cache (bfs, "ab");
+ if (!outf)
+ {
+ logf (LOG_FATAL|LOG_ERRNO, "open %s", bfs->cache_fname);
+ exit (1);
+ }
+ fprintf (outf, "%s %d\n", name, block_size);
+ fclose (outf);
+ }
+ }
+ else
{
- log(LOG_FATAL, "Mfopen failed for %s", name);
- return(0);
+ tmp->mf = mf_open(bfs->register_area, name, block_size, wflag);
+ tmp->cf = NULL;
}
+ if (!tmp->mf)
+ {
+ logf (LOG_FATAL, "mf_open failed for %s", name);
+ xfree (tmp);
+ return 0;
+ }
+ zebra_lock_rdwr_init (&tmp->rdwr_lock);
return(tmp);
}
-int bf_read (BFile bf, int no, int offset, int num, void *buf)
+int bf_read (BFile bf, int no, int offset, int nbytes, void *buf)
+{
+ int r;
+
+ zebra_lock_rdwr_rlock (&bf->rdwr_lock);
+ if (bf->cf)
+ {
+ if ((r = cf_read (bf->cf, no, offset, nbytes, buf)) == -1)
+ r = mf_read (bf->mf, no, offset, nbytes, buf);
+ }
+ else
+ r = mf_read (bf->mf, no, offset, nbytes, buf);
+ zebra_lock_rdwr_runlock (&bf->rdwr_lock);
+ return r;
+}
+
+int bf_write (BFile bf, int no, int offset, int nbytes, const void *buf)
{
- return mf_read(bf->mf, no, offset, num, buf);
+ int r;
+ zebra_lock_rdwr_wlock (&bf->rdwr_lock);
+ if (bf->cf)
+ r = cf_write (bf->cf, no, offset, nbytes, buf);
+ else
+ r = mf_write (bf->mf, no, offset, nbytes, buf);
+ zebra_lock_rdwr_wunlock (&bf->rdwr_lock);
+ return r;
}
-int bf_write (BFile bf, int no, int offset, int num, const void *buf)
+int bf_commitExists (BFiles bfs)
{
- return mf_write(bf->mf, no, offset, num, buf);
+ FILE *inf;
+
+ inf = open_cache (bfs, "rb");
+ if (inf)
+ {
+ fclose (inf);
+ return 1;
+ }
+ return 0;
+}
+
+void bf_reset (BFiles bfs)
+{
+ if (!bfs)
+ return;
+ mf_reset (bfs->commit_area);
+ mf_reset (bfs->register_area);
+}
+
+void bf_commitExec (BFiles bfs)
+{
+ FILE *inf;
+ int block_size;
+ char path[256];
+ MFile mf;
+ CFile cf;
+ int first_time;
+
+ assert (bfs->commit_area);
+ if (!(inf = open_cache (bfs, "rb")))
+ {
+ logf (LOG_LOG, "No commit file");
+ return ;
+ }
+ while (fscanf (inf, "%s %d", path, &block_size) == 2)
+ {
+ mf = mf_open (bfs->register_area, path, block_size, 1);
+ cf = cf_open (mf, bfs->commit_area, path, block_size, 0, &first_time);
+
+ cf_commit (cf);
+
+ cf_close (cf);
+ mf_close (mf);
+ }
+ fclose (inf);
+}
+
+void bf_commitClean (BFiles bfs, const char *spec)
+{
+ FILE *inf;
+ int block_size;
+ char path[256];
+ MFile mf;
+ CFile cf;
+ int mustDisable = 0;
+ int firstTime;
+
+ if (!bfs->commit_area)
+ {
+ bf_cache (bfs, spec);
+ mustDisable = 1;
+ }
+
+ if (!(inf = open_cache (bfs, "rb")))
+ return ;
+ while (fscanf (inf, "%s %d", path, &block_size) == 2)
+ {
+ mf = mf_open (bfs->register_area, path, block_size, 0);
+ cf = cf_open (mf, bfs->commit_area, path, block_size, 1, &firstTime);
+ cf_unlink (cf);
+ cf_close (cf);
+ mf_close (mf);
+ }
+ fclose (inf);
+ unlink_cache (bfs);
+ if (mustDisable)
+ bf_cache (bfs, 0);
}