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global.h
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1 
11 /*
12  * This library is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU Lesser General Public License as
14  * published by the Free Software Foundation; either version 2.1 of
15  * the License, or (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20  * GNU Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with this library; if not, write to the Free Software
24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25  *
26  */
27 
28 #ifndef __ALSA_GLOBAL_H_
29 #define __ALSA_GLOBAL_H_
30 
31 /* for timeval and timespec */
32 #include <time.h>
33 
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
37 
47 const char *snd_asoundlib_version(void);
48 
49 #ifndef ATTRIBUTE_UNUSED
50 
51 #define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
52 #endif
53 
54 #ifdef PIC /* dynamic build */
55 
57 #define __SND_DLSYM_VERSION(name, version) _ ## name ## version
58 
62 #define SND_DLSYM_BUILD_VERSION(name, version) char __SND_DLSYM_VERSION(name, version);
63 
64 #else /* static build */
65 
66 struct snd_dlsym_link {
67  struct snd_dlsym_link *next;
68  const char *dlsym_name;
69  const void *dlsym_ptr;
70 };
71 
72 extern struct snd_dlsym_link *snd_dlsym_start;
73 
75 #define __SND_DLSYM_VERSION(prefix, name, version) _ ## prefix ## name ## version
76 
80 #define SND_DLSYM_BUILD_VERSION(name, version) \
81  static struct snd_dlsym_link __SND_DLSYM_VERSION(snd_dlsym_, name, version); \
82  void __SND_DLSYM_VERSION(snd_dlsym_constructor_, name, version) (void) __attribute__ ((constructor)); \
83  void __SND_DLSYM_VERSION(snd_dlsym_constructor_, name, version) (void) { \
84  __SND_DLSYM_VERSION(snd_dlsym_, name, version).next = snd_dlsym_start; \
85  __SND_DLSYM_VERSION(snd_dlsym_, name, version).dlsym_name = # name; \
86  __SND_DLSYM_VERSION(snd_dlsym_, name, version).dlsym_ptr = (void *)&name; \
87  snd_dlsym_start = &__SND_DLSYM_VERSION(snd_dlsym_, name, version); \
88  }
89 
90 #endif
91 
92 #ifndef __STRING
93 
94 #define __STRING(x) #x
95 #endif
96 
98 #define SND_DLSYM_VERSION(version) __STRING(version)
99 
100 void *snd_dlopen(const char *file, int mode);
101 void *snd_dlsym(void *handle, const char *name, const char *version);
102 int snd_dlclose(void *handle);
103 
104 
106 #define __snd_alloca(ptr,type) do { *ptr = (type##_t *) alloca(type##_sizeof()); memset(*ptr, 0, type##_sizeof()); } while (0)
107 
114 typedef struct _snd_async_handler snd_async_handler_t;
115 
121 typedef void (*snd_async_callback_t)(snd_async_handler_t *handler);
122 
123 int snd_async_add_handler(snd_async_handler_t **handler, int fd,
124  snd_async_callback_t callback, void *private_data);
129 
130 struct snd_shm_area *snd_shm_area_create(int shmid, void *ptr);
131 struct snd_shm_area *snd_shm_area_share(struct snd_shm_area *area);
132 int snd_shm_area_destroy(struct snd_shm_area *area);
133 
134 int snd_user_file(const char *file, char **result);
135 
136 #ifdef __GLIBC__
137 #if !defined(_POSIX_C_SOURCE) && !defined(_POSIX_SOURCE)
138 struct timeval {
139  time_t tv_sec; /* seconds */
140  long tv_usec; /* microseconds */
141 };
142 
143 struct timespec {
144  time_t tv_sec; /* seconds */
145  long tv_nsec; /* nanoseconds */
146 };
147 #endif
148 #endif
149 
151 typedef struct timeval snd_timestamp_t;
153 typedef struct timespec snd_htimestamp_t;
154 
157 #ifdef __cplusplus
158 }
159 #endif
160 
161 #endif /* __ALSA_GLOBAL_H */
void * snd_dlsym(void *handle, const char *name, const char *version)
Resolves a symbol from a dynamic library - ALSA wrapper for dlsym.
Definition: dlmisc.c:162
int snd_async_handler_get_signo(snd_async_handler_t *handler)
Returns the signal number assigned to an async handler.
Definition: async.c:185
void(* snd_async_callback_t)(snd_async_handler_t *handler)
Async notification callback.
Definition: global.h:121
int snd_async_add_handler(snd_async_handler_t **handler, int fd, snd_async_callback_t callback, void *private_data)
Registers an async handler.
Definition: async.c:100
const char * snd_asoundlib_version(void)
Returns the ALSA sound library version in ASCII format.
Definition: error.c:143
int snd_async_handler_get_fd(snd_async_handler_t *handler)
Returns the file descriptor assigned to an async handler.
Definition: async.c:196
struct timespec snd_htimestamp_t
Definition: global.h:153
void * snd_dlopen(const char *file, int mode)
Opens a dynamic library - ALSA wrapper for dlopen.
Definition: dlmisc.c:51
int snd_dlclose(void *handle)
Closes a dynamic library - ALSA wrapper for dlclose.
Definition: dlmisc.c:102
struct _snd_async_handler snd_async_handler_t
Internal structure for an async notification client handler.
Definition: global.h:114
struct timeval snd_timestamp_t
Definition: global.h:151
int snd_user_file(const char *file, char **result)
Get the full file name.
Definition: userfile.c:66
void * snd_async_handler_get_callback_private(snd_async_handler_t *handler)
Returns the private data assigned to an async handler.
Definition: async.c:207
int snd_async_del_handler(snd_async_handler_t *handler)
Deletes an async handler.
Definition: async.c:138
void * ptr
Definition: seq_event.h:199

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