From 0df63e44c3e315ec0fe427ae62558231864108bd Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Fri, 28 Apr 2006 15:13:41 +0200 Subject: [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 --- include/sound/asound.h | 2 +- include/sound/pcm.h | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-) (limited to 'include') 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 { -- cgit v1.2.3-59-g8ed1b