2007-10-28 19:13:50 +00:00
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#ifndef foopulseobjecthfoo
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#define foopulseobjecthfoo
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/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2006 Pierre Ossman <ossman@cendio.se> for Cendio AB
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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2009-03-03 20:23:02 +00:00
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by the Free Software Foundation; either version 2.1 of the License,
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2007-10-28 19:13:50 +00:00
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#include <sys/types.h>
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#include <pulse/xmalloc.h>
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#include <pulsecore/refcnt.h>
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#include <pulsecore/macro.h>
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typedef struct pa_object pa_object;
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struct pa_object {
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PA_REFCNT_DECLARE;
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const char *type_id;
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2007-10-28 19:13:50 +00:00
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void (*free)(pa_object *o);
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bool (*check_type)(const char *type_name);
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};
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2013-06-27 19:28:09 +02:00
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pa_object *pa_object_new_internal(size_t size, const char *type_id, bool (*check_type)(const char *type_id));
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#define pa_object_new(type) ((type*) pa_object_new_internal(sizeof(type), type##_type_id, type##_check_type)
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2008-08-30 01:22:41 +02:00
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#define pa_object_free ((void (*) (pa_object* _obj)) pa_xfree)
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2007-10-28 19:13:50 +00:00
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2013-06-27 19:28:09 +02:00
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bool pa_object_check_type(const char *type_id);
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2007-10-28 19:13:50 +00:00
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2009-08-21 21:27:44 +02:00
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extern const char pa_object_type_id[];
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2013-06-27 19:28:09 +02:00
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static inline bool pa_object_isinstance(void *o) {
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pa_object *obj = (pa_object*) o;
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return obj ? obj->check_type(pa_object_type_id) : true;
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}
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pa_object *pa_object_ref(pa_object *o);
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void pa_object_unref(pa_object *o);
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static inline int pa_object_refcnt(pa_object *o) {
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return o ? PA_REFCNT_VALUE(o) : 0;
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}
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static inline pa_object* pa_object_cast(void *o) {
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pa_object *obj = (pa_object*) o;
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pa_assert(!obj || obj->check_type(pa_object_type_id));
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return obj;
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}
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#define pa_object_assert_ref(o) pa_assert(pa_object_refcnt(o) > 0)
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#define PA_OBJECT(o) pa_object_cast(o)
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2009-08-21 21:27:44 +02:00
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#define PA_DECLARE_CLASS_COMMON(c) \
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static inline bool c##_isinstance(void *o) { \
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pa_object *obj = (pa_object*) o; \
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return obj ? obj->check_type(c##_type_id) : true; \
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} \
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static inline c* c##_cast(void *o) { \
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pa_assert(c##_isinstance(o)); \
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return (c*) o; \
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} \
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static inline c* c##_ref(c *o) { \
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object: Get rid of "warning: cast increases required alignment of target type"
On ARM, pa_object has less strict alignment requirements
than e.g. pa_sink and pa_source, so when pa_object is cast
to pa_sink, the compiler thinks that it's unsafe. In this
case, however, the pointer given to pa_sink_ref() was a
pa_sink pointer to begin with, so casting it first to
pa_object and then back to pa_sink is entirely safe.
This particular source of warnings is extremely annoying,
because this message is printed for any compilation unit
that includes sink.h, source.h or any other header that
defines a class, and the message tends to get printed
multiple times for one compilation unit:
In file included from ./pulsecore/source-output.h:37:0,
from ./pulsecore/source.h:49,
from ./pulsecore/sink.h:40,
from ./pulsecore/core.h:50,
from daemon/daemon-conf.h:31,
from daemon/cmdline.h:25,
from daemon/cmdline.c:38:
./pulsecore/sink-input.h: In function 'pa_sink_input_ref':
./pulsecore/sink-input.h:245:1: warning: cast increases required alignment of target type [-Wcast-align]
2012-08-14 17:08:37 +03:00
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return (c *) ((void *) pa_object_ref(PA_OBJECT(o))); \
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} \
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static inline void c##_unref(c* o) { \
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pa_object_unref(PA_OBJECT(o)); \
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} \
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static inline int c##_refcnt(c* o) { \
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return pa_object_refcnt(PA_OBJECT(o)); \
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} \
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static inline void c##_assert_ref(c *o) { \
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pa_object_assert_ref(PA_OBJECT(o)); \
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} \
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struct __stupid_useless_struct_to_allow_trailing_semicolon
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2009-08-21 21:27:44 +02:00
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#define PA_DECLARE_PUBLIC_CLASS(c) \
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extern const char c##_type_id[]; \
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PA_DECLARE_CLASS_COMMON(c); \
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bool c##_check_type(const char *type_id)
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#define PA_DEFINE_PUBLIC_CLASS(c, parent) \
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const char c##_type_id[] = #c; \
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bool c##_check_type(const char *type_id) { \
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if (type_id == c##_type_id) \
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return true; \
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return parent##_check_type(type_id); \
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} \
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struct __stupid_useless_struct_to_allow_trailing_semicolon
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#define PA_DEFINE_PRIVATE_CLASS(c, parent) \
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static const char c##_type_id[] = #c; \
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PA_DECLARE_CLASS_COMMON(c); \
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static bool c##_check_type(const char *type_id) { \
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if (type_id == c##_type_id) \
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return true; \
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return parent##_check_type(type_id); \
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} \
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struct __stupid_useless_struct_to_allow_trailing_semicolon
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#endif
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