epoll_create(2) - Linux man page
Name
epoll_create - open an epoll file descriptor
Synopsis
#include <sys/epoll.h>
int epoll_create(int size)
Description
Open an
epoll file descriptor by requesting the kernel allocate an event backing store dimensioned
for
size descriptors. The
size is not the maximum size of the backing store but just a hint to the kernel about how to dimension internal
structures. The returned file descriptor will be used for all the subsequent calls to the
epoll interface. The file descriptor returned by
epoll_create(2) must be closed by using
close(2).
Return Value
When successful,
epoll_create(2) returns a non-negative integer identifying the descriptor.
When an error occurs,
epoll_create(2) returns -1 and
errno is set appropriately.
Errors
- EINVAL
- size is not positive.
- ENFILE
- The system limit on the total number of open files has been reached.
- ENOMEM
- There was insufficient memory to create the kernel object.
Conforming to
epoll_create(2) is a new API introduced in Linux kernel 2.5.44. The interface should be
finalized by Linux kernel 2.5.66.
See Also
close(2),
epoll_ctl(2),
epoll_wait(2),
epoll(7)
Referenced By
epoll(4)
