poll-h.md

# poll.h
## **Overview**
**Related Modules:**
[IO](IO.md)
**Description:**
Declares I/O multiplexing functions.
You can use the functions provided in this file to perform I/O multiplexing.
**Since:**
1.0
**Version:**
1.0
## **Summary**
## Data Structures

Data Structure Name	Description
pollfd	Defines I/O multiplexing.

## Macros

Macro Name and Value	Description
POLLIN   0x001	POLLIN event.
POLLPRI   0x002	POLLPRI event.
POLLOUT   0x004	POLLOUT event.
POLLERR   0x008	POLLERR event.
POLLHUP   0x010	POLLHUP event.
POLLNVAL   0x020	POLLNVAL event.

## Typedefs

Typedef Name	Description
nfds_t	typedef unsigned long  Number of poll types.

## Functions

Function Name	Description
poll (struct pollfd fds[], nfds_t nfds, int timeout)	int  Defines the I/O multiplexing system.