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authorTakashi Iwai <tiwai@suse.de>2006-04-28 17:13:41 +0400
committerJaroslav Kysela <perex@suse.cz>2006-06-22 23:33:13 +0400
commit0df63e44c3e315ec0fe427ae62558231864108bd (patch)
tree3cff6f5d5fdb7ad047a61c591d891e3ca1bc669e /include/sound
parentf001c3acf64b8ca18fe40af592629abb261b321e (diff)
downloadlinux-0df63e44c3e315ec0fe427ae62558231864108bd.tar.xz
[ALSA] Add O_APPEND flag support to PCM
Added O_APPEND flag support to PCM to enable shared substreams among multiple processes. This mechanism is used by dmix and dsnoop plugins. Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound')
-rw-r--r--include/sound/asound.h2
-rw-r--r--include/sound/pcm.h5
2 files changed, 4 insertions, 3 deletions
diff --git a/include/sound/asound.h b/include/sound/asound.h
index 9cc021c7ee11..41885f48ad91 100644
--- a/include/sound/asound.h
+++ b/include/sound/asound.h
@@ -137,7 +137,7 @@ enum {
* *
*****************************************************************************/
-#define SNDRV_PCM_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 7)
+#define SNDRV_PCM_VERSION SNDRV_PROTOCOL_VERSION(2, 0, 8)
typedef unsigned long snd_pcm_uframes_t;
typedef signed long snd_pcm_sframes_t;
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 998bacefc8f8..cebf0310a8dc 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -368,7 +368,8 @@ struct snd_pcm_substream {
struct snd_pcm_group *group; /* pointer to current group */
/* -- assigned files -- */
void *file;
- struct file *ffile;
+ int ref_count;
+ unsigned int f_flags;
void (*pcm_release)(struct snd_pcm_substream *);
#if defined(CONFIG_SND_PCM_OSS) || defined(CONFIG_SND_PCM_OSS_MODULE)
/* -- OSS things -- */
@@ -387,7 +388,7 @@ struct snd_pcm_substream {
unsigned int hw_opened: 1;
};
-#define SUBSTREAM_BUSY(substream) ((substream)->file != NULL)
+#define SUBSTREAM_BUSY(substream) ((substream)->ref_count > 0)
struct snd_pcm_str {