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Diffstat (limited to 'src/pulsecore/object.h')
| -rw-r--r-- | src/pulsecore/object.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/src/pulsecore/object.h b/src/pulsecore/object.h new file mode 100644 index 00000000..1ddce3b4 --- /dev/null +++ b/src/pulsecore/object.h @@ -0,0 +1,120 @@ +#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, 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_id; + void (*free)(pa_object *o); + pa_bool_t (*check_type)(const char *type_name); +}; + +pa_object *pa_object_new_internal(size_t size, const char *type_id, pa_bool_t (*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) + +pa_bool_t pa_object_check_type(const char *type_id); + +extern const char pa_object_type_id[]; + +static inline pa_bool_t 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 pa_bool_t 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*) 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); \ + pa_bool_t c##_check_type(const char *type_id) + +#define PA_DEFINE_PUBLIC_CLASS(c, parent) \ + const char c##_type_id[] = #c; \ + pa_bool_t 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 pa_bool_t 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 |