a4l_descriptor Struct Reference
[Descriptor Syscall API]

---

Detailed Description

Structure containing device-information useful to users.

See also:

a4l_get_desc()

Data Fields
char	board_name [A4L_NAMELEN]
	Board name.
int	nb_subd
	Subdevices count.
int	idx_read_subd
	Input subdevice index.
int	idx_write_subd
	Output subdevice index.
int	fd
	File descriptor.
unsigned int	magic
	Opaque field.
int	sbsize
	Data buffer size.
void *	sbdata
	Data buffer pointer.

---

Field Documentation

char a4l_descriptor::board_name[A4L_NAMELEN]

Board name.

int a4l_descriptor::nb_subd

Subdevices count.

Referenced by a4l_get_chinfo(), a4l_get_rnginfo(), and a4l_get_subdinfo().

int a4l_descriptor::idx_read_subd

Input subdevice index.

Referenced by a4l_async_read().

int a4l_descriptor::idx_write_subd

Output subdevice index.

Referenced by a4l_async_write().

int a4l_descriptor::fd

File descriptor.

Referenced by a4l_async_read(), a4l_async_write(), a4l_close(), a4l_fill_desc(), a4l_get_bufsize(), a4l_mark_bufrw(), a4l_mmap(), a4l_open(), a4l_poll(), a4l_set_bufsize(), a4l_snd_cancel(), a4l_snd_command(), a4l_snd_insn(), and a4l_snd_insnlist().

unsigned int a4l_descriptor::magic

Opaque field.

Referenced by a4l_fill_desc(), a4l_find_range(), a4l_get_chinfo(), a4l_get_rnginfo(), a4l_get_subdinfo(), and a4l_sys_desc().

int a4l_descriptor::sbsize

Data buffer size.

void* a4l_descriptor::sbdata

Data buffer pointer.

Referenced by a4l_get_chinfo(), a4l_get_rnginfo(), and a4l_get_subdinfo().

---

The documentation for this struct was generated from the following file:

• include/analogy/descriptor.h