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#ifndef foopulseobjecthfoo
#define foopulseobjecthfoo
/***
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 2.1 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
General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#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_id;
void (*free)(pa_object *o);
bool (*check_type)(const char *type_name);
};
pa_object *pa_object_new_internal(size_t size, const char *type_id, bool (*check_type)(const char *type_id));
#define pa_object_new(type) ((type*) pa_object_new_internal(sizeof(type), type##_type_id, type##_check_type)
#define pa_object_free ((void (*) (pa_object* _obj)) pa_xfree)
bool pa_object_check_type(const char *type_id);
extern const char pa_object_type_id[];
static inline bool pa_object_isinstance(void *o) {
pa_object *obj = (pa_object*) o;
return obj ? obj->check_type(pa_object_type_id) : true;
}
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;
}
static inline pa_object* pa_object_cast(void *o) {
pa_object *obj = (pa_object*) o;
pa_assert(!obj || obj->check_type(pa_object_type_id));
return obj;
}
#define pa_object_assert_ref(o) pa_assert(pa_object_refcnt(o) > 0)
#define PA_OBJECT(o) pa_object_cast(o)
#define PA_DECLARE_CLASS_COMMON(c) \
static inline bool c##_isinstance(void *o) { \
pa_object *obj = (pa_object*) o; \
return obj ? obj->check_type(c##_type_id) : true; \
} \
static inline c* c##_cast(void *o) { \
pa_assert(c##_isinstance(o)); \
return (c*) o; \
} \
static inline c* c##_ref(c *o) { \
return (c *) ((void *) 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
#define PA_DECLARE_PUBLIC_CLASS(c) \
extern const char c##_type_id[]; \
PA_DECLARE_CLASS_COMMON(c); \
bool c##_check_type(const char *type_id)
#define PA_DEFINE_PUBLIC_CLASS(c, parent) \
const char c##_type_id[] = #c; \
bool c##_check_type(const char *type_id) { \
if (type_id == c##_type_id) \
return true; \
return parent##_check_type(type_id); \
} \
struct __stupid_useless_struct_to_allow_trailing_semicolon
#define PA_DEFINE_PRIVATE_CLASS(c, parent) \
static const char c##_type_id[] = #c; \
PA_DECLARE_CLASS_COMMON(c); \
static bool c##_check_type(const char *type_id) { \
if (type_id == c##_type_id) \
return true; \
return parent##_check_type(type_id); \
} \
struct __stupid_useless_struct_to_allow_trailing_semicolon
#endif
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