acl.himpi.sys_create_epoll

hi_s32 hi_mpi_sys_create_epoll(hi_s32 size, hi_s32 *epoll_fd);

epoll_fd, ret = acl.himpi.sys_create_epoll(size)

Creates an epoll instance for media data processing to allow you to use the epoll programming model to operate the input and output data of the media data processing channel.

The Atlas 200/300/500 Inference Product does not support this API in the current version.

The Atlas Training Series Product does not support this API in the current version.

size: int, maximum number of DVPP channel file descriptors that can be processed by the epoll instance. This field is reserved. Set it to a positive number.

epoll_fd: int, pointer address of the file descriptor of an epoll instance. The number of file descriptors is restricted by the maximum number of files that can be opened at the same time in a task in the Linux OS, which can be viewed by using the ulimit -al command.

ret: int, error code.

• 0 indicates success.
• Other values: failure. For details, see Common Return Codes.

• acl.himpi.sys_create_epoll, acl.himpi.sys_ctl_epoll, acl.himpi.sys_wait_epoll, and acl.himpi.sys_close_epoll must be used in conjunction. Use the epoll programming model to operate the input/output data of DVPP channels.

• The VPC function does not support this API.