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Cleanups in IPC stuff.

Browse source 
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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22
src/pcm/pcm_null.c
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@ -41,7 +41,6 @@ const char *_snd_module_pcm_null = "";
typedef struct {
snd_timestamp_t trigger_tstamp;
snd_pcm_state_t state;
int shmid;
snd_pcm_uframes_t appl_ptr;
snd_pcm_uframes_t hw_ptr;
int poll_fd;
@ -81,7 +80,7 @@ static int snd_pcm_null_info(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_info_t * i
static int snd_pcm_null_channel_info(snd_pcm_t *pcm, snd_pcm_channel_info_t * info)
{
snd_pcm_null_t *null = pcm->private_data;
return snd_pcm_channel_info_shm(pcm, info, null->shmid);
return snd_pcm_channel_info_shm(pcm, info, -1);
}
static int snd_pcm_null_status(snd_pcm_t *pcm, snd_pcm_status_t * status)
@ -273,28 +272,13 @@ static int snd_pcm_null_sw_params(snd_pcm_t *pcm ATTRIBUTE_UNUSED, snd_pcm_sw_pa
return 0;
}
static int snd_pcm_null_mmap(snd_pcm_t *pcm)
static int snd_pcm_null_mmap(snd_pcm_t *pcm ATTRIBUTE_UNUSED)
{
snd_pcm_null_t *null = pcm->private_data;
if (!(pcm->info & SND_PCM_INFO_MMAP)) {
size_t size = snd_pcm_frames_to_bytes(pcm, pcm->buffer_size);
int id = shmget(IPC_PRIVATE, size, 0666);
if (id < 0) {
SYSERR("shmget failed");
return -errno;
}
null->shmid = id;
}
return 0;
}
static int snd_pcm_null_munmap(snd_pcm_t *pcm)
static int snd_pcm_null_munmap(snd_pcm_t *pcm ATTRIBUTE_UNUSED)
{
snd_pcm_null_t *null = pcm->private_data;
if (shmctl(null->shmid, IPC_RMID, 0) < 0) {
SYSERR("shmctl IPC_RMID failed");
return -errno;
}
return 0;
}