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[ALSA] dynamic minors (3/6): store device-specific object pointers dynamically

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Instead of storing the pointers to the device-specific structures in an
array, put them into the struct snd_minor, and look them up dynamically.

This makes the device type modules independent of the minor number
encoding.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
This commit is contained in:
Clemens Ladisch 2005-11-20 14:06:59 +01:00 • committed by Jaroslav Kysela
commit f87135f56c
17 changed files with 278 additions and 197 deletions
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9
include/sound/core.h
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@ -187,6 +187,7 @@ struct snd_minor {
int card; /* card number */
int device; /* device number */
struct file_operations *f_ops; /* file operations */
void *private_data; /* private data for f_ops->open */
char name[0]; /* device name (keep at the end of
structure) */
};
@ -199,13 +200,17 @@ extern int snd_ecards_limit;
void snd_request_card(int card);
int snd_register_device(int type, struct snd_card *card, int dev,
struct file_operations *f_ops, const char *name);
struct file_operations *f_ops, void *private_data,
const char *name);
int snd_unregister_device(int type, struct snd_card *card, int dev);
void *snd_lookup_minor_data(unsigned int minor, int type);
#ifdef CONFIG_SND_OSSEMUL
int snd_register_oss_device(int type, struct snd_card *card, int dev,
struct file_operations *f_ops, const char *name);
struct file_operations *f_ops, void *private_data,
const char *name);
int snd_unregister_oss_device(int type, struct snd_card *card, int dev);
void *snd_lookup_oss_minor_data(unsigned int minor, int type);
#endif
int snd_minor_info_init(void);