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/**
* \file <alsa/global.h>
* \brief Application interface library for the ALSA driver
* \author Jaroslav Kysela <perex@suse.cz>
* \author Abramo Bagnara <abramo@alsa-project.org>
* \author Takashi Iwai <tiwai@suse.de>
* \date 1998-2001
*
* Application interface library for the ALSA driver
*
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef __ALSA_GLOBAL_H_
#define __ALSA_GLOBAL_H_
#ifdef __cplusplus
extern "C" {
#endif
/**
* \defgroup Global Global defines and functions
* Global defines and functions.
* \{
*/
#ifndef ATTRIBUTE_UNUSED
/** do not print warning (gcc) when function parameter is not used */
#define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
#endif
#ifdef PIC /* dynamic build */
/** helper macro for SND_DLSYM_BUILD_VERSION \hideinitializer */
#define __SND_DLSYM_VERSION(name, version) _ ## name ## version
/** build version for versioned dynamic symbol \hideinitializer */
#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;
/** helper macro for SND_DLSYM_BUILD_VERSION \hideinitializer */
#define __SND_DLSYM_VERSION(prefix, name, version) _ ## prefix ## name ## version
/** build version for versioned dynamic symbol \hideinitializer */
#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
/** get version of dynamic symbol as string */
#define SND_DLSYM_VERSION(version) __STRING(version)
void *snd_dlopen(const char *file, int mode);
void *snd_dlsym(void *handle, const char *name, const char *version);
int snd_dlclose(void *handle);
/** Async notification client handler */
typedef struct _snd_async_handler snd_async_handler_t;
/** Async notification callback */
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);
/** \} */
#ifdef __cplusplus
}
#endif
#endif /* __ALSA_GLOBAL_H */
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