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Cleanups in IPC stuff.

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Cleanups in snd_pcm_close().
Added initial code for dmix plugin:
  - only skeleton, but all major problems should be solved
This commit is contained in:
Jaroslav Kysela 2003-02-04 14:48:51 +00:00
parent 74859a4646
commit 8720faaccb
10 changed files with 1132 additions and 59 deletions
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20
src/pcm/pcm_plugin.c
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@ -178,8 +178,7 @@ int snd_pcm_plugin_sw_params(snd_pcm_t *pcm, snd_pcm_sw_params_t *params)
int snd_pcm_plugin_channel_info(snd_pcm_t *pcm, snd_pcm_channel_info_t *info)
{
snd_pcm_plugin_t *plugin = pcm->private_data;
return snd_pcm_channel_info_shm(pcm, info, plugin->shmid);
return snd_pcm_channel_info_shm(pcm, info, -1);
}
snd_pcm_state_t snd_pcm_plugin_state(snd_pcm_t *pcm)
@ -569,26 +568,13 @@ snd_pcm_sframes_t snd_pcm_plugin_avail_update(snd_pcm_t *pcm)
}
}
int snd_pcm_plugin_mmap(snd_pcm_t *pcm)
int snd_pcm_plugin_mmap(snd_pcm_t *pcm ATTRIBUTE_UNUSED)
{
snd_pcm_plugin_t *plug = pcm->private_data;
size_t size = snd_pcm_frames_to_bytes(pcm, (snd_pcm_sframes_t) pcm->buffer_size);
int id = shmget(IPC_PRIVATE, size, 0666);
if (id < 0) {
SYSERR("shmget failed");
return -errno;
}
plug->shmid = id;
return 0;
}
int snd_pcm_plugin_munmap(snd_pcm_t *pcm)
int snd_pcm_plugin_munmap(snd_pcm_t *pcm ATTRIBUTE_UNUSED)
{
snd_pcm_plugin_t *plug = pcm->private_data;
if (shmctl(plug->shmid, IPC_RMID, 0) < 0) {
SYSERR("shmctl IPC_RMID failed");
return -errno;
}
return 0;
}