#ifndef foopulseobjecthfoo
#define foopulseobjecthfoo
-/* $Id$ */
-
/***
This file is part of PulseAudio.
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,
+ 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
***/
#include <sys/types.h>
+
#include <pulse/xmalloc.h>
#include <pulsecore/refcnt.h>
#include <pulsecore/macro.h>
struct pa_object {
PA_REFCNT_DECLARE;
- const char *type_name;
+ 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_name);
-#define pa_object_new(type) ((type*) pa_object_new_internal(sizeof(type), #type))
+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)
-#define pa_object_free ((void (*) (pa_object* o)) 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);
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)); \
- } \
+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