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More generic support for poll descriptors

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This commit is contained in:
Abramo Bagnara 2001-02-12 23:51:49 +00:00
parent a86efa083c
commit 460660d4b4
25 changed files with 162 additions and 68 deletions
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34
src/hwdep/hwdep.c
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@ -42,6 +42,7 @@ int snd_hwdep_open(snd_hwdep_t **handle, int card, int device, int mode)
int fd, ver;
char filename[32];
snd_hwdep_t *hwdep;
assert(handle);
*handle = NULL;
@ -77,27 +78,26 @@ int snd_hwdep_open(snd_hwdep_t **handle, int card, int device, int mode)
int snd_hwdep_close(snd_hwdep_t *hwdep)
{
int res;
if (!hwdep)
return -EINVAL;
assert(hwdep);
res = close(hwdep->fd) < 0 ? -errno : 0;
free(hwdep);
return res;
}
int snd_hwdep_poll_descriptor(snd_hwdep_t *hwdep)
int snd_hwdep_poll_descriptors(snd_hwdep_t *hwdep, struct pollfd *pfds, unsigned int space)
{
if (!hwdep)
return -EINVAL;
return hwdep->fd;
assert(hwdep);
if (space >= 1) {
pfds->fd = hwdep->fd;
pfds->events = POLLOUT | POLLIN;
}
return 1;
}
int snd_hwdep_block_mode(snd_hwdep_t *hwdep, int enable)
{
long flags;
if (!hwdep)
return -EINVAL;
assert(hwdep);
if ((flags = fcntl(hwdep->fd, F_GETFL)) < 0)
return -errno;
if (enable)
@ -111,8 +111,7 @@ int snd_hwdep_block_mode(snd_hwdep_t *hwdep, int enable)
int snd_hwdep_info(snd_hwdep_t *hwdep, snd_hwdep_info_t *info)
{
if (!hwdep || !info)
return -EINVAL;
assert(hwdep && info);
if (ioctl(hwdep->fd, SNDRV_HWDEP_IOCTL_INFO, info) < 0)
return -errno;
return 0;
@ -120,8 +119,7 @@ int snd_hwdep_info(snd_hwdep_t *hwdep, snd_hwdep_info_t *info)
int snd_hwdep_ioctl(snd_hwdep_t *hwdep, int request, void * arg)
{
if (!hwdep)
return -EINVAL;
assert(hwdep);
if (ioctl(hwdep->fd, request, arg) < 0)
return -errno;
return 0;
@ -130,9 +128,7 @@ int snd_hwdep_ioctl(snd_hwdep_t *hwdep, int request, void * arg)
ssize_t snd_hwdep_write(snd_hwdep_t *hwdep, const void *buffer, size_t size)
{
ssize_t result;
if (!hwdep || (!buffer && size > 0))
return -EINVAL;
assert(hwdep && (buffer || size == 0));
result = write(hwdep->fd, buffer, size);
if (result < 0)
return -errno;
@ -142,9 +138,7 @@ ssize_t snd_hwdep_write(snd_hwdep_t *hwdep, const void *buffer, size_t size)
ssize_t snd_hwdep_read(snd_hwdep_t *hwdep, void *buffer, size_t size)
{
ssize_t result;
if (!hwdep || (!buffer && size > 0))
return -EINVAL;
assert(hwdep && (buffer || size == 0));
result = read(hwdep->fd, buffer, size);
if (result < 0)
return -errno;