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database: add abstracted database API

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This commit is contained in:
Lennart Poettering 2009-05-14 01:21:56 +02:00
parent 905c8004a0
commit c69ed91239
1 changed files with 61 additions and 0 deletions
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61
src/pulsecore/database.h Normal file
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#ifndef foopulsecoredatabasehfoo
#define foopulsecoredatabasehfoo
/***
This file is part of PulseAudio.
Copyright 2009 Lennart Poettering
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
PulseAudio 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#include <sys/types.h>
#include <pulsecore/macro.h>
/* A little abstraction over simple databases, such as gdbm, tdb, and
* so on. We only make minimal assumptions about the supported
* backend: it does not need to support locking, it does not have to
* be arch independant. */
typedef struct pa_database pa_database;
typedef struct pa_datum {
void *data;
size_t size;
} pa_datum;
void pa_datum_free(pa_datum *d);
/* This will append a suffix to the filename */
pa_database* pa_database_open(const char *fn, pa_bool_t for_write);
void pa_database_close(pa_database *db);
pa_datum* pa_database_get(pa_database *db, const pa_datum *key, pa_datum* data);
int pa_database_set(pa_database *db, const pa_datum *key, const pa_datum* data, pa_bool_t overwrite);
int pa_database_unset(pa_database *db, const pa_datum *key);
int pa_database_clear(pa_database *db);
signed pa_database_size(pa_database *db);
pa_datum* pa_database_first(pa_database *db, pa_datum *key, pa_datum *data /* may be NULL */);
pa_datum* pa_database_next(pa_database *db, const pa_datum *key, pa_datum *next, pa_datum *data /* may be NULL */);
int pa_database_sync(pa_database *db);
#endif