'\" te
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.TH RSM_INTR_SIGNAL_WAIT_POLLFD 3RSM "April 9, 2016"
.SH NAME
rsm_intr_signal_wait_pollfd \- wait for events on a list of file descriptors
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR... ] \fIfile\fR\&.\|.\|. \fB-lrsm\fR [ \fIlibrary \&.\|.\|.\fR ]
#include <rsmapi.h>

\fBint\fR \fBrsm_intr_signal_wait_pollfd\fR(\fBstruct pollfd\fR \fIfds\fR[],
     \fBnfds_t\fR \fInfds\fR, \fBint\fR \fItimeout\fR, \fBint *\fR\fInumfdsp\fR);
.fi

.SH DESCRIPTION
.LP
The \fBrsm_intr_signal_wait_pollfd()\fR function is similar to
\fBrsm_intr_signal_wait\fR(3RSM), except that it  allows an application to
multiplex I/O over various types of file descriptors. Applications can use this
function to wait for interrupt signals on RSMAPI segments as well as poll for
I/O events on other non-RSMAPI file descriptors.
.sp
.LP
The \fIfds\fR argument is an array of \fBpollfd\fR structures that correspond
to both RSMAPI segments and other file descriptors. The
\fBrsm_memseg_get_pollfd\fR(3RSM) is used to obtain a \fBpollfd\fR structure
corresponding to an RSMAPI segment.
.sp
.LP
The number of file descriptors that have events is returned in \fInumfdsp\fR.
This parameter can be set to \fINULL\fR if the application is not interested in
the number of file descriptors that have events. See \fBpoll\fR(2) for
descriptions of the \fBpollfd\fR structure as well as the \fInfds\fR and
\fItimeout\fR parameters.
.sp
.LP
It is the application's responsibility to establish the validity of a
\fBpollfd\fR structure corresponding to an RSMAPI segment by ensuring that
\fBrsm_memseg_release_pollfd\fR(3RSM) has not been called on the segment or
that the segment has not been destroyed.
.sp
.LP
For file descriptors other than RSMAPI segments, the behavior of
\fBrsm_intr_signal_wait_pollfd()\fR is similar to \fBpoll()\fR.
.SH RETURN VALUES
.LP
Upon successful completion, \fBrsm_intr_signal_wait_pollfd()\fR returns 0 and
the \fBrevents\fR member of the \fBpollfd\fR struct corresponding to an RSMAPI
segment is set to \fBPOLLRDNORM\fR, indicating that an interrupt signal for
that segment was received. Otherwise, an error value is returned.
.sp
.LP
For file descriptors other than RSMAPI segments, the \fBrevents\fR member of
the \fBpollfd\fR struct is identical to that returned by \fBpoll\fR(2).
.SH ERRORS
.LP
The \fBrsm_intr_signal_wait_pollfd()\fR function can return the following
errors:
.sp
.ne 2
.na
\fB\fBRSMERR_TIMEOUT\fR\fR
.ad
.sp .6
.RS 4n
Timeout has occurred.
.RE

.sp
.ne 2
.na
\fB\fBRSMERR_BAD_ARGS_ERRORS\fR\fR
.ad
.sp .6
.RS 4n
Invalid arguments passed.
.RE

.sp
.ne 2
.na
\fB\fBRSMERR_BAD_ADDR\fR\fR
.ad
.sp .6
.RS 4n
An argument points to an illegal address.
.RE

.sp
.ne 2
.na
\fB\fBRSMERR_INTERRUPTED\fR\fR
.ad
.sp .6
.RS 4n
The call was interrupted.
.RE

.sp
.ne 2
.na
\fB\fBRSMERR_INSUFFICIENT_MEM\fR\fR
.ad
.sp .6
.RS 4n
Insufficient memory.
.RE

.sp
.ne 2
.na
\fB\fBRSMERR_INSUFFICIENT_RESOURCES\fR\fR
.ad
.sp .6
.RS 4n
Insufficient resources.
.RE

.SH ATTRIBUTES
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Evolving
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.LP
.BR poll (2),
.BR rsm_intr_signal_wait (3RSM),
.BR rsm_memseg_get_pollfd (3RSM),
.BR rsm_memseg_release_pollfd (3RSM),
.BR attributes (7)