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Changed data type of alsa-lib handles from 'void *' to the specific type for

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the handle in use. This should be more type-safe as the compiler will perform
checking on type now.
This commit is contained in:
Frank van de Pol 1999-06-02 00:40:30 +00:00
parent 9679707a00
commit 19811bb9b4
15 changed files with 417 additions and 404 deletions
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50
src/mixer/mixer.c
View file

@ -31,13 +31,13 @@
#define SND_FILE_MIXER "/dev/snd/mixerC%iD%i"
#define SND_MIXER_VERSION_MAX SND_PROTOCOL_VERSION(2, 0, 0)
typedef struct {
struct snd_mixer {
int card;
int device;
int fd;
} snd_mixer_t;
} ;
int snd_mixer_open(void **handle, int card, int device)
int snd_mixer_open(snd_mixer_t **handle, int card, int device)
{
int fd, ver;
char filename[32];
@ -73,12 +73,12 @@ int snd_mixer_open(void **handle, int card, int device)
return 0;
}
int snd_mixer_close(void *handle)
int snd_mixer_close(snd_mixer_t *handle)
{
snd_mixer_t *mixer;
int res;
mixer = (snd_mixer_t *) handle;
mixer = handle;
if (!mixer)
return -EINVAL;
res = close(mixer->fd) < 0 ? -errno : 0;
@ -86,21 +86,21 @@ int snd_mixer_close(void *handle)
return res;
}
int snd_mixer_file_descriptor(void *handle)
int snd_mixer_file_descriptor(snd_mixer_t *handle)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
mixer = handle;
if (!mixer)
return -EINVAL;
return mixer->fd;
}
int snd_mixer_info(void *handle, snd_mixer_info_t * info)
int snd_mixer_info(snd_mixer_t *handle, snd_mixer_info_t * info)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
mixer = handle;
if (!mixer || !info)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_INFO, info) < 0)
@ -108,11 +108,11 @@ int snd_mixer_info(void *handle, snd_mixer_info_t * info)
return 0;
}
int snd_mixer_elements(void *handle, snd_mixer_elements_t * elements)
int snd_mixer_elements(snd_mixer_t *handle, snd_mixer_elements_t * elements)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
mixer = handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENTS, elements) < 0)
@ -120,11 +120,11 @@ int snd_mixer_elements(void *handle, snd_mixer_elements_t * elements)
return 0;
}
int snd_mixer_routes(void *handle, snd_mixer_routes_t * routes)
int snd_mixer_routes(snd_mixer_t *handle, snd_mixer_routes_t * routes)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
mixer = handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ROUTES, routes) < 0)
@ -132,11 +132,11 @@ int snd_mixer_routes(void *handle, snd_mixer_routes_t * routes)
return 0;
}
int snd_mixer_groups(void *handle, snd_mixer_groups_t * groups)
int snd_mixer_groups(snd_mixer_t *handle, snd_mixer_groups_t * groups)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
mixer = handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_GROUPS, groups) < 0)
@ -144,11 +144,11 @@ int snd_mixer_groups(void *handle, snd_mixer_groups_t * groups)
return 0;
}
int snd_mixer_group(void *handle, snd_mixer_group_t * group)
int snd_mixer_group(snd_mixer_t *handle, snd_mixer_group_t * group)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
mixer = handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_GROUP, group) < 0)
@ -156,11 +156,11 @@ int snd_mixer_group(void *handle, snd_mixer_group_t * group)
return 0;
}
int snd_mixer_element_info(void *handle, snd_mixer_element_info_t * info)
int snd_mixer_element_info(snd_mixer_t *handle, snd_mixer_element_info_t * info)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
mixer = handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENT_INFO, info) < 0)
@ -169,11 +169,11 @@ int snd_mixer_element_info(void *handle, snd_mixer_element_info_t * info)
}
int snd_mixer_element_read(void *handle, snd_mixer_element_t * element)
int snd_mixer_element_read(snd_mixer_t *handle, snd_mixer_element_t * element)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
mixer = handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENT_READ, element) < 0)
@ -181,11 +181,11 @@ int snd_mixer_element_read(void *handle, snd_mixer_element_t * element)
return 0;
}
int snd_mixer_element_write(void *handle, snd_mixer_element_t * element)
int snd_mixer_element_write(snd_mixer_t *handle, snd_mixer_element_t * element)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
mixer = handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENT_WRITE, element) < 0)
@ -193,13 +193,13 @@ int snd_mixer_element_write(void *handle, snd_mixer_element_t * element)
return 0;
}
int snd_mixer_read(void *handle, snd_mixer_callbacks_t * callbacks)
int snd_mixer_read(snd_mixer_t *handle, snd_mixer_callbacks_t * callbacks)
{
snd_mixer_t *mixer;
int result, count;
snd_mixer_read_t r;
mixer = (snd_mixer_t *) handle;
mixer = handle;
if (!mixer)
return -EINVAL;
count = 0;