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  4. rte_epoll.h(3)

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rte_epoll.h(3) DPDK rte_epoll.h(3)

NAME

rte_epoll.h

SYNOPSIS

#include <stdint.h>
#include <rte_stdatomic.h>

Data Structures


struct rte_epoll_event

Macros


#define RTE_EPOLL_PER_THREAD -1

Functions


int rte_epoll_wait (int epfd, struct rte_epoll_event *events, int maxevents, int timeout)
int rte_epoll_wait_interruptible (int epfd, struct rte_epoll_event *events, int maxevents, int timeout)
int rte_epoll_ctl (int epfd, int op, int fd, struct rte_epoll_event *event)

Detailed Description

The rte_epoll provides interfaces functions to add delete events, wait poll for an event.

Definition in file rte_epoll.h.

Macro Definition Documentation

#define RTE_EPOLL_PER_THREAD -1

to hint using per thread epfd

Definition at line 48 of file rte_epoll.h.

Function Documentation

int rte_epoll_wait (int epfd, struct rte_epoll_event * events, int maxevents, int timeout)

It waits for events on the epoll instance. Retries if signal received.

Parameters:

epfd Epoll instance fd on which the caller wait for events.
events Memory area contains the events that will be available for the caller.
maxevents Up to maxevents are returned, must greater than zero.
timeout Specifying a timeout of -1 causes a block indefinitely. Specifying a timeout equal to zero cause to return immediately.

Returns:

  • On success, returns the number of available event.
  • On failure, a negative value.

int rte_epoll_wait_interruptible (int epfd, struct rte_epoll_event * events, int maxevents, int timeout)

It waits for events on the epoll instance. Does not retry if signal received.

Parameters:

epfd Epoll instance fd on which the caller wait for events.
events Memory area contains the events that will be available for the caller.
maxevents Up to maxevents are returned, must greater than zero.
timeout Specifying a timeout of -1 causes a block indefinitely. Specifying a timeout equal to zero cause to return immediately.

Returns:

  • On success, returns the number of available event.
  • On failure, a negative value.

int rte_epoll_ctl (int epfd, int op, int fd, struct rte_epoll_event * event)

It performs control operations on epoll instance referred by the epfd. It requests that the operation op be performed for the target fd.

Parameters:

epfd Epoll instance fd on which the caller perform control operations.
op The operation be performed for the target fd.
fd The target fd on which the control ops perform.
event Describes the object linked to the fd. Note: The caller must take care the object deletion after CTL_DEL.

Returns:

  • On success, zero.
  • On failure, a negative value.

Author

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Thu May 23 2024 Version 23.11.0