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Specifies the maximum number of socket file descriptors in the file descriptor sets.

psockp_sock_desc_rd

Pointer to a set of socket file descriptors to:

• • Check for available read operations.
  • Returns the actual socket file descriptors ready for available read operations, if no errors;
  • Returns the initial, non-modified set of socket file descriptors, on any errors;
  • Returns a null-valued (i.e., zero-cleared) descriptor set, if any timeout expires.

psockp_sock_desc_wr

Pointer to a set of socket file descriptors to:

• • Check for available read operations.
  • Returns the actual socket file descriptors ready for available write operations, if no errors;
  • Returns the initial, non-modified set of socket file descriptors, on any errors;
  • Returns a null-valued (i.e., zero-cleared) descriptor set, if any timeout expires.

psockp_sock_desc_err

Pointer to a set of socket file descriptors to:

• • Check for any available socket errors.
  • Returns the actual socket file descriptors ready with any pending errors;
  • Returns the initial, non-modified set of socket file descriptors, on any errors;
  • Returns a null-valued (i.e., zero-cleared) descriptor set, if any timeout expires.

ptimeoutp_timeout

Pointer to a timeout argument.

perrp_err

Pointer to variable that will receive the error code from this function:

NET_SOCK_ERR_NONE
NET_SOCK_ERR_TIMEOUT
NET_INIT_ERR_INITNOT_INCOMPLETECOMPLETED
NET_SOCK_ERR_INVALID_DESC
NET_SOCK_ERR_INVALID_TIMEOUT
NET_SOCK_ERR_INVALID_SOCK
NET_SOCK_ERR_INVALID_TYPE
NET_SOCK_ERR_NOT_USED
NET_SOCK_ERR_EVENTS_NBR_MAX
NET_OSERR_ERRFAULT_LOCK_ACQUIRE


Returned Value

Returns the number of sockets ready with available operations, if successful;

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NET_SOCK_BSD_ERR_SEL/-1, otherwise.

Required Configuration

NetSock_Sel() is available only if either NET_CFG_TRANSPORT_LAYER_SEL is configured for TCP (see section D-12-1) and/or NET_UDP_CFG_APP_API_SEL is configured for sockets (see section D-13-1) and if Available only if NET_SOCK_CFG_SEL_EN is  is enabled (see section D-15-4).In addition, select() is available only if NET_BSD_CFG_API_EN is enabled (see section D-17-1section Socket Layer Configuration).

Notes / Warnings

Supports socket file descriptors only (i.e., socket ID numbers).

The descriptor macro’s is used to prepare and decode socket file descriptor sets (see section C-13-33 through section C-13-37macro functions in section Network Socket Functions).

See “net_sock.c NetSock_Sel() Note #3” for more details.