135 lines
3.0 KiB
C
135 lines
3.0 KiB
C
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/*
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* $Id: $
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* simple gdbm database implementation
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*
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* Copyright (C) 2003-2006 Ron Pedde (rpedde@sourceforge.net)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <errno.h>
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#include <gdbm.h>
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#include <limits.h>
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#include <pthread.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include "err.h"
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#include "mp3-scanner.h"
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#include "redblack.h"
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#include "db-gdbm.h"
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#ifndef GDBM_SYNC
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# define GDBM_SYNC 0
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#endif
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#ifndef GDBM_NOLOCK
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# define GDBM_NOLOCK 0
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#endif
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/* Typedefs */
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/* Globals */
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static pthread_mutex_t _gdbm_mutex = PTHREAD_MUTEX_INITIALIZER; /**< gdbm not reentrant */
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static GDBM_FILE _gdbm_songs;
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/* Forwards */
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void _gdbm_lock(void);
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void _gdbm_unlock(void);
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/**
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* lock the db_mutex
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*/
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void _gdbm_lock(void) {
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int err;
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if((err=pthread_mutex_lock(&_gdbm_mutex))) {
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DPRINTF(E_FATAL,L_DB,"cannot lock gdbm lock: %s\n",strerror(err));
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}
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}
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/**
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* unlock the db_mutex
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*/
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void _gdbm_unlock(void) {
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int err;
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if((err=pthread_mutex_unlock(&_gdbm_mutex))) {
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DPRINTF(E_FATAL,L_DB,"cannot unlock gdbm lock: %s\n",strerror(err));
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}
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}
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/**
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* open the gdbm database
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*
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* @param pe error buffer
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* @param parameters db-specific parameter. In this case,
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* the path to use
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* @returns DB_E_SUCCESS on success, DB_E_* otherwise.
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*/
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int db_gdbm_open(char **pe, char *parameters) {
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char db_path[PATH_MAX + 1];
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snprintf(db_path,sizeof(db_path),"%s/%s",parameters,"songs.gdb");
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// reload = reload ? GDBM_NEWDB : GDBM_WRCREAT;
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_gdbm_lock();
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_gdbm_songs = gdbm_open(db_path, 0, GDBM_WRCREAT | GDBM_SYNC | GDBM_NOLOCK,
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0600,NULL);
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if(!_gdbm_songs) {
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/* let's try creating it! */
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_gdbm_songs = gdbm_open(db_path,0,GDBM_NEWDB | GDBM_SYNC | GDBM_NOLOCK,
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0600,NULL);
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}
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_gdbm_unlock();
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if(!_gdbm_songs) {
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DPRINTF(E_FATAL,L_DB,"Could not open songs database (%s): %s\n",
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db_path,strerror(errno));
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return FALSE;
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}
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return TRUE;
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}
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/**
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* Don't really have a db initialization separate from opening.
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*/
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int db_gdbm_init(int reload) {
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return TRUE;
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}
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/**
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* Close the database
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*/
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int db_gdbm_deinit(void) {
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_gdbm_lock();
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gdbm_close(_gdbm_songs);
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_gdbm_unlock();
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return TRUE;
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}
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