global.h

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/*
 *   This library 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.
 *
 *   This program 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 Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public
 *   License along with this library; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */
 
#ifndef __ALSA_GLOBAL_H_
#define __ALSA_GLOBAL_H_
 
/* for timeval and timespec */
#include <time.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
const char *snd_asoundlib_version(void);
 
#ifndef ATTRIBUTE_UNUSED
#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
#endif
 
#ifdef PIC /* dynamic build */
 
#define __SND_DLSYM_VERSION(name, version) _ ## name ## version
#define SND_DLSYM_BUILD_VERSION(name, version) char __SND_DLSYM_VERSION(name, version);
 
#else /* static build */
 
struct snd_dlsym_link {
    struct snd_dlsym_link *next;
    const char *dlsym_name;
    const void *dlsym_ptr;
};
 
extern struct snd_dlsym_link *snd_dlsym_start;
 
#define __SND_DLSYM_VERSION(prefix, name, version) _ ## prefix ## name ## version
#define SND_DLSYM_BUILD_VERSION(name, version) \
  static struct snd_dlsym_link __SND_DLSYM_VERSION(snd_dlsym_, name, version); \
  void __SND_DLSYM_VERSION(snd_dlsym_constructor_, name, version) (void) __attribute__ ((constructor)); \
  void __SND_DLSYM_VERSION(snd_dlsym_constructor_, name, version) (void) { \
    __SND_DLSYM_VERSION(snd_dlsym_, name, version).next = snd_dlsym_start; \
    __SND_DLSYM_VERSION(snd_dlsym_, name, version).dlsym_name = # name; \
    __SND_DLSYM_VERSION(snd_dlsym_, name, version).dlsym_ptr = (void *)&name; \
    snd_dlsym_start = &__SND_DLSYM_VERSION(snd_dlsym_, name, version); \
  }
 
#endif
 
#ifndef __STRING
#define __STRING(x)     #x
#endif
 
#define SND_DLSYM_VERSION(version) __STRING(version)
 
int snd_dlpath(char *path, size_t path_len, const char *name);
void *snd_dlopen(const char *file, int mode, char *errbuf, size_t errbuflen);
void *snd_dlsym(void *handle, const char *name, const char *version);
int snd_dlclose(void *handle);
 
 
#define __snd_alloca(ptr,type) do { *ptr = (type##_t *) alloca(type##_sizeof()); memset(*ptr, 0, type##_sizeof()); } while (0)
 
typedef struct _snd_async_handler snd_async_handler_t;
 
typedef void (*snd_async_callback_t)(snd_async_handler_t *handler);
 
int snd_async_add_handler(snd_async_handler_t **handler, int fd, 
              snd_async_callback_t callback, void *private_data);
int snd_async_del_handler(snd_async_handler_t *handler);
int snd_async_handler_get_fd(snd_async_handler_t *handler);
int snd_async_handler_get_signo(snd_async_handler_t *handler);
void *snd_async_handler_get_callback_private(snd_async_handler_t *handler);
 
struct snd_shm_area *snd_shm_area_create(int shmid, void *ptr);
struct snd_shm_area *snd_shm_area_share(struct snd_shm_area *area);
int snd_shm_area_destroy(struct snd_shm_area *area);
 
int snd_user_file(const char *file, char **result);
 
#ifdef __GLIBC__
#if !defined(_POSIX_C_SOURCE) && !defined(_POSIX_SOURCE)
struct timeval {
    time_t      tv_sec;     /* seconds */
    long        tv_usec;    /* microseconds */
};
 
struct timespec {
    time_t      tv_sec;     /* seconds */
    long        tv_nsec;    /* nanoseconds */
};
#endif
#endif
 
typedef struct timeval snd_timestamp_t;
typedef struct timespec snd_htimestamp_t;
 
#ifdef __cplusplus
}
#endif
 
#endif /* __ALSA_GLOBAL_H */