BPXYIOV is used by readv(), writev(), sendmsg() and recvmsg(). AMODE 64 callers use BPXYIOV — Map the I/O vector structure.
BPXYIOV ,
** BPXYIOV: Socket I/O Vectors
** Used By: FCT OPN
IOV DSECT ,
IOV_ENTRY DS 0F Array Entry
* -------------------------- 31-bit format
IOV_BASE DS A Address of buffer
IOV_LEN DS F Length of buffer
*
IOV#LENGTH EQU *-IOV_ENTRY Length of this structure
IOV_MAX EQU 120 Maximum number of entries
** BPXYIOV End