pulseaudio/src/pulsecore/object.h

#ifndef foopulseobjecthfoo
#define foopulseobjecthfoo

/* $Id$ */

/***
  This file is part of PulseAudio.

  Copyright 2004-2006 Lennart Poettering
  Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB

  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 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
  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 <pulse/xmalloc.h>
#include <pulsecore/refcnt.h>
#include <pulsecore/macro.h>

typedef struct pa_object pa_object;

struct pa_object {
    PA_REFCNT_DECLARE;
    const char *type_name;
    void (*free)(pa_object *o);
};

pa_object *pa_object_new_internal(size_t size, const char *type_name);
#define pa_object_new(type) ((type*) pa_object_new_internal(sizeof(type), #type))

#define pa_object_free ((void (*) (pa_object* o)) pa_xfree)

pa_object *pa_object_ref(pa_object *o);
void pa_object_unref(pa_object *o);

static inline int pa_object_refcnt(pa_object *o) {
    return o ? PA_REFCNT_VALUE(o) : 0;
}

#define pa_object_assert_ref(o) pa_assert(pa_object_refcnt(o))

#define PA_OBJECT(o) ((pa_object*) (o))

#define PA_DECLARE_CLASS(c) \
    static inline c* c##_ref(c *o) {                            \
        return (c*) pa_object_ref(PA_OBJECT(o));                \
    }                                                           \
    static inline void c##_unref(c* o) {                        \
        pa_object_unref(PA_OBJECT(o));                          \
    }                                                           \
    static inline int c##_refcnt(c* o) {                        \
        return pa_object_refcnt(PA_OBJECT(o));                  \
    }                                                           \
    static inline void c##_assert_ref(c *o) {                   \
        pa_object_assert_ref(PA_OBJECT(o));                     \
    }                                                           \
    struct __stupid_useless_struct_to_allow_trailing_semicolon

#endif