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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
parent 6983b7240c
commit f87135f56c
17 changed files with 278 additions and 197 deletions
Download patch file Download diff file Expand all files Collapse all files

9
include/sound/core.h
View file

@ -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);

1
include/sound/hwdep.h
View file

@ -43,6 +43,7 @@ struct snd_hwdep_ops {
struct snd_hwdep {
struct snd_card *card;
struct list_head list;
int device;
char id[32];
char name[80];

2
include/sound/pcm.h
View file

@ -412,6 +412,7 @@ struct snd_pcm_str {
struct snd_pcm {
struct snd_card *card;
struct list_head list;
unsigned int device; /* device number */
unsigned int info_flags;
unsigned short dev_class;
@ -439,7 +440,6 @@ struct snd_pcm_notify {
* Registering
*/
extern struct snd_pcm *snd_pcm_devices[];
extern struct file_operations snd_pcm_f_ops[2];
int snd_pcm_new(struct snd_card *card, char *id, int device,

6
include/sound/rawmidi.h
View file

@ -113,7 +113,7 @@ struct snd_rawmidi_str {
struct snd_rawmidi {
struct snd_card *card;
struct list_head list;
unsigned int device; /* device number */
unsigned int info_flags; /* SNDRV_RAWMIDI_INFO_XXXX */
char id[64];
@ -165,8 +165,8 @@ int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream,
/* main midi functions */
int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info);
int snd_rawmidi_kernel_open(int cardnum, int device, int subdevice, int mode,
struct snd_rawmidi_file *rfile);
int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice,
int mode, struct snd_rawmidi_file *rfile);
int snd_rawmidi_kernel_release(struct snd_rawmidi_file *rfile);
int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream,
struct snd_rawmidi_params *params);