RSM_INTR_SIGNAL_WAIT_POLLFD(3RSM)RSM_INTR_SIGNAL_WAIT_POLLFD(3RSM)NAMErsm_intr_signal_wait_pollfd - wait for events on a list of file
descriptors
SYNOPSIS
cc [ flag... ] file... -lrsm [ library ... ]
#include <rsmapi.h>
int rsm_intr_signal_wait_pollfd(struct pollfd fds[],
nfds_t nfds, int timeout, int *numfdsp);
DESCRIPTION
The rsm_intr_signal_wait_pollfd() function is similar to rsm_intr_sig‐
nal_wait(3RSM), except that it allows an application to multiplex I/O
over various types of file descriptors. Applications can use this func‐
tion to wait for interrupt signals on RSMAPI segments as well as poll
for I/O events on other non-RSMAPI file descriptors.
The fds argument is an array of pollfd structures that correspond to
both RSMAPI segments and other file descriptors. The rsm_mem‐
seg_get_pollfd(3RSM) is used to obtain a pollfd structure corresponding
to an RSMAPI segment.
The number of file descriptors that have events is returned in numfdsp.
This parameter can be set to NULL if the application is not interested
in the number of file descriptors that have events. See poll(2) for
descriptions of the pollfd structure as well as the nfds and timeout
parameters.
It is the application's responsibility to establish the validity of a
pollfd structure corresponding to an RSMAPI segment by ensuring that
rsm_memseg_release_pollfd(3RSM) has not been called on the segment or
that the segment has not been destroyed.
For file descriptors other than RSMAPI segments, the behavior of
rsm_intr_signal_wait_pollfd() is similar to poll().
RETURN VALUES
Upon successful completion, rsm_intr_signal_wait_pollfd() returns 0 and
the revents member of the pollfd struct corresponding to an RSMAPI seg‐
ment is set to POLLRDNORM, indicating that an interrupt signal for that
segment was received. Otherwise, an error value is returned.
For file descriptors other than RSMAPI segments, the revents member of
the pollfd struct is identical to that returned by poll(2).
ERRORS
The rsm_intr_signal_wait_pollfd() function can return the following
errors:
RSMERR_TIMEOUT
Timeout has occured.
RSMERR_BAD_ARGS_ERRORS
Invalid arguments passed.
RSMERR_BAD_ADDR
An argument points to an illegal address.
RSMERR_INTERRUPTED
The call was interrupted.
RSMERR_INSUFFICIENT_MEM
Insufficient memory.
RSMERR_INSUFFICIENT_RESOURCES
Insufficient resources.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌────────────────────┬─────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├────────────────────┼─────────────────┤
│Interface Stability │ Evolving │
├────────────────────┼─────────────────┤
│MT-Level │ MT-Safe │
└────────────────────┴─────────────────┘
SEE ALSOpoll(2), rsm_intr_signal_wait(3RSM), rsm_memseg_get_pollfd(3RSM),
rsm_memseg_release_pollfd(3RSM), attributes(5)
Dec 1, 2002RSM_INTR_SIGNAL_WAIT_POLLFD(3RSM)
