VLC  4.0.0-dev
vlc_probe.h
Go to the documentation of this file.
1 /*****************************************************************************
2  * vlc_probe.h: service probing interface
3  *****************************************************************************
4  * Copyright (C) 2009 RĂ©mi Denis-Courmont
5  *
6  * This program is free software; you can redistribute it and/or modify it
7  * under the terms of the GNU Lesser General Public License as published by
8  * the Free Software Foundation; either version 2.1 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public License
17  * along with this program; if not, write to the Free Software Foundation,
18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
19  *****************************************************************************/
20 
21 #ifndef VLC_PROBE_H
22 # define VLC_PROBE_H 1
23 
24 # include <stdlib.h>
25 
26 /**
27  * \file
28  * This file defines functions and structures to run-time probe VLC extensions
29  */
30 
31 # ifdef __cplusplus
32 extern "C" {
33 # endif
34 
35 void *vlc_probe (vlc_object_t *, const char *, size_t *);
36 #define vlc_probe(obj, cap, pcount) \
37  vlc_probe(VLC_OBJECT(obj), cap, pcount)
38 
39 struct vlc_probe_t
40 {
41  struct vlc_object_t obj;
42 
43  void *list;
44  size_t count;
45 };
46 
47 typedef struct vlc_probe_t vlc_probe_t;
48 
49 static inline int vlc_probe_add(vlc_probe_t *obj, const void *data,
50  size_t len)
51 {
52  char *tab = (char *)realloc (obj->list, (obj->count + 1) * len);
53 
54  if (unlikely(tab == NULL))
55  return VLC_ENOMEM;
56  memcpy(tab + (obj->count * len), data, len);
57  obj->list = tab;
58  obj->count++;
59  return VLC_SUCCESS;
60 }
61 
62 # define VLC_PROBE_CONTINUE VLC_EGENERIC
63 # define VLC_PROBE_STOP VLC_SUCCESS
64 
65 # ifdef __cplusplus
66 }
67 # endif
68 
69 #endif
vlc_probe_t::count
size_t count
Definition: vlc_probe.h:45
unlikely
#define unlikely(p)
Predicted false condition.
Definition: vlc_common.h:227
vlc_common.h
vlc_probe
#define vlc_probe(obj, cap, pcount)
Definition: vlc_probe.h:37
vlc_probe_t
Definition: vlc_probe.h:40
vlc_probe_t::obj
struct vlc_object_t obj
Definition: vlc_probe.h:42
vlc_probe_t::list
void * list
Definition: vlc_probe.h:44
vlc_object_t
VLC object common members.
Definition: vlc_objects.h:43
VLC_ENOMEM
#define VLC_ENOMEM
Not enough memory.
Definition: vlc_common.h:476
VLC_SUCCESS
#define VLC_SUCCESS
No error.
Definition: vlc_common.h:472
vlc_probe_add
static int vlc_probe_add(vlc_probe_t *obj, const void *data, size_t len)
Definition: vlc_probe.h:50