Error handling

Defines
#define	SND_ERROR_BEGIN   500000
#define	SND_ERROR_INCOMPATIBLE_VERSION   (SND_ERROR_BEGIN+0)
#define	SND_ERROR_ALISP_NIL   (SND_ERROR_BEGIN+1)
#define	SNDERR(args...)   snd_lib_error(__FILE__, __LINE__, __FUNCTION__, 0, ##args)
#define	SYSERR(args...)   snd_lib_error(__FILE__, __LINE__, __FUNCTION__, errno, ##args)
Typedefs
typedef void(*	snd_lib_error_handler_t )(const char *file, int line, const char *function, int err, const char *fmt,...)
	Error handler callback.
Functions
const char *	snd_strerror (int errnum)
	Returns the message for an error code.
int	snd_lib_error_set_handler (snd_lib_error_handler_t handler)
	Sets the error handler.
Variables
snd_lib_error_handler_t	snd_lib_error
snd_lib_error_handler_t	snd_lib_error = snd_lib_error_default

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Detailed Description

Error handling macros and functions.

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Define Documentation

#define SND_ERROR_ALISP_NIL   (SND_ERROR_BEGIN+1)

Lisp encountered an error during acall.

#define SND_ERROR_BEGIN   500000

Lower boundary of sound error codes.

#define SND_ERROR_INCOMPATIBLE_VERSION   (SND_ERROR_BEGIN+0)

Kernel/library protocols are not compatible.

#define SNDERR (  args...   )     snd_lib_error(__FILE__, __LINE__, __FUNCTION__, 0, ##args)

Shows a sound error message.

#define SYSERR (  args...   )     snd_lib_error(__FILE__, __LINE__, __FUNCTION__, errno, ##args)

Shows a system error message (related to errno).

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Typedef Documentation

typedef void(* snd_lib_error_handler_t)(const char *file, int line, const char *function, int err, const char *fmt,...)

Error handler callback. Parameters: file  Source file name. line  Line number. function  Function name. err  Value of errno, or 0 if not relevant. fmt  printf(3) format. ...  printf(3) arguments. A function of this type is called by the ALSA library when an error occurs. This function usually shows the message on the screen, and/or logs it.

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Function Documentation

int snd_lib_error_set_handler (  snd_lib_error_handler_t  handler  )

Sets the error handler. Parameters: handler  The pointer to the new error handler function. This function sets a new error handler, or (if handler is NULL) the default one which prints the error messages to stderr.

const char* snd_strerror (  int  errnum  )

Returns the message for an error code. Parameters: errnum  The error code number, which must be a system error code or an ALSA error code. Returns: The ASCII description of the given numeric error code. Examples: /test/latency.c, /test/pcm.c, and /test/timer.c.

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Variable Documentation

snd_lib_error_handler_t snd_lib_error = snd_lib_error_default

Pointer to the error handler function. For internal use only.

snd_lib_error_handler_t snd_lib_error

Pointer to the error handler function. For internal use only.

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