'\" te
.\" Copyright (c) 2005, 2014, Oracle and/or its affiliates. All rights reserved.
.TH pool_walk_components 3POOL "22 Apr 2014" "SunOS 5.11" "Pool Configuration Manipulation Library Functions"
.SH NAME
pool_walk_components, pool_walk_pools, pool_walk_resources \- walk objects within resource pool configurations
.SH SYNOPSIS
.LP
.nf
cc [ \fIflag\fR\&.\|.\|. ] \fIfile\fR\&.\|.\|. \fB-lpool\fR [ \fIlibrary\fR\&.\|.\|. ] 
#include <pool.h>

\fBint\fR \fBpool_walk_components\fR(\fBpool_conf_t *\fR\fIconf\fR,
     \fBpool_resource_t *\fR\fIresource\fR, \fBvoid *\fR\fIarg\fR,
     \fBint (*\fR\fIcallback\fR)(\fBpool_conf_t *\fR, \fBpool_component_t *\fR, \fBvoid *\fR));
.fi

.LP
.nf
\fBint\fR \fBpool_walk_pools\fR(\fBpool_conf_t *\fR\fIconf\fR, \fBvoid *\fR\fIarg\fR,
     \fBint (*\fR\fIcallback\fR)(\fBpool_conf_t *\fR, \fBpool_t *\fR, \fBvoid *\fR));
.fi

.LP
.nf
\fBint\fR \fBpool_walk_resources\fR(\fBpool_conf_t *\fR\fIconf\fR, \fBpool_t *\fR\fIpool\fR,
     \fBvoid *\fR\fIarg\fR, \fBint (*\fR\fIcallback\fR)(\fBpool_conf_t *\fR,
     \fBpool_resource_t *\fR, \fBvoid *\fR));
.fi

.SH DESCRIPTION
.sp
.LP
The walker functions provided with \fBlibpool\fR(3LIB) visit each associated entity of the given type, and call the caller-provided \fIcallback\fR function with a user-provided additional opaque argument. There is no implied order of visiting nodes in the walk.  If the \fIcallback\fR function returns a non-zero value at any of the nodes, the walk is terminated, and an error value of -1 returned. The \fIconf\fR argument for each function refers to the target configuration to which the operation applies.
.sp
.LP
The \fBpool_walk_components()\fR function invokes \fIcallback\fR on all components contained in the resource.
.sp
.LP
The \fBpool_walk_pools()\fR function invokes \fIcallback\fR on all pools defined in the configuration.
.sp
.LP
The \fBpool_walk_resources()\fR function invokes \fIcallback\fR function on all resources associated with \fIpool\fR.
.SH RETURN VALUES
.sp
.LP
Upon successful completion of the walk, these functions return 0. Otherwise -1 is returned and \fBpool_error\fR(3POOL) returns the pool-specific error value.
.SH ERRORS
.sp
.LP
These functions will fail if:
.sp
.ne 2
.mk
.na
\fB\fBPOE_BADPARAM\fR\fR
.ad
.RS 20n
.rt  
The supplied configuration's status is not \fBPOF_VALID\fR.
.RE

.sp
.ne 2
.mk
.na
\fB\fBPOE_INVALID_CONF\fR\fR
.ad
.RS 20n
.rt  
The configuration is invalid.
.RE

.sp
.ne 2
.mk
.na
\fB\fBPOE_SYSTEM\fR\fR
.ad
.RS 20n
.rt  
A system error has occurred. Check the system error code for more details.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
CSIEnabled
_
Interface StabilityUncommitted
_
MT-LevelSafe
.TE

.SH SEE ALSO
.sp
.LP
\fBlibpool\fR(3LIB), \fBpool_error\fR(3POOL), \fBattributes\fR(5)