/usr/share/tcltk/combat0.8/orb.tcl is in tcl-combat 0.8.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# ======================================================================
# This file is part of Combat/Tcl, a Tcl CORBA Object Request Broker
#
# Please visit the Combat Web site at http://www.fpx.de/Combat/ for
# more information.
#
# Copyright (c) Frank Pilhofer, combat@fpx.de
#
# ======================================================================
#
# CVS Version Tag: $Id: orb.tcl,v 1.16 2008-11-14 02:06:58 Owner Exp $
#
# ----------------------------------------------------------------------
# The ORB
# ----------------------------------------------------------------------
#
namespace eval Combat {
namespace eval CORBA {
variable ORB_conn_cond
itcl::class ORB {
private common requests
private common callbacks
private common reqid 0
private common reqids_timer
private common reqids_timedout
private common reqids_completed
private common fake_asyncs
private common objprocid 0
public common refs_fwd
public common refs_rev
public common initial_pseudo_references
public common initial_references
public common default_init_ref ""
public common iiop_serverports
public common iiop_servers
public common ior_template
public common hostname
#
# send_request and receive_reply are low-level functions
# that process a single GIOP request/response.
#
# They are encapsulated by the higher-level functions
# invoke_sync, invoke_async, get_async_reply and
# poll_async_reply, which transparently perform a retry
# upon LOCATION_FORWARD etc.
#
private proc send_request {rid response object operation rtype \
plevel params values {exceptions {}}} {
incr plevel
set conn [$object connect]
if {$response} {
set id [$conn send_request $response $object \
$operation $plevel $params $values {} \
"::Combat::CORBA::ORB::callback $rid"]
} else {
set id [$conn send_request $response $object \
$operation $plevel $params $values]
}
if {$response} {
$conn ref
set requests($rid) [list $object $operation $conn $id \
$rtype $params $values $exceptions -1]
} else {
set requests($rid) [list $object {} {} $id {} \
{} {} {} 0]
}
#
# trigger callback if !response_expected
#
if {!$response} {
after 0 "::Combat::CORBA::ORB::callback $rid 0"
}
}
private proc receive_reply {rid plevel} {
if {![info exists requests($rid)]} {
::corba::throw [list IDL:omg.org/CORBA/BAD_PARAM:1.0 \
[list minor 0 completion_status COMPLETED_MAYBE]]
}
set data $requests($rid)
set object [lindex $data 0]
set operation [lindex $data 1]
set conn [lindex $data 2]
set connid [lindex $data 3]
set rtype [lindex $data 4]
set params [lindex $data 5]
set values [lindex $data 6]
set exceptions [lindex $data 7]
set status [lindex $data 8]
if {$status != -1} {
# This invocation has already completed
set res [lindex $data 9]
unset requests($rid)
return [list $status $res]
}
incr plevel
if {[catch {
set res [$conn receive_reply $connid $rtype $plevel \
$params $values $exceptions]
} oops]} {
#
# This should only occur when the request was canceled.
#
set res [list -1]
}
$conn deref
set status [lindex $res 0]
switch -- $status {
0 -
1 -
2 {
# After a successful method invocation, we set a
# flag that allows the object to reuse its entire
# set of profiles after disconnecting
$object configure -reset_profile 1
}
3 { # LOCATION_FORWARD
#
# A LOCATION_FORWARD is also indicated, without a
# new IOR, upon receiving a CloseConnection message.
#
if {[llength $res] == 2} {
$object forward [lindex $res 1]
} else {
$object next_profile
}
}
4 { # LOCATION_FORWARD_PERM
$object forward [lindex $res 1] 1
}
5 { # NEEDS_ADDRESSING_MODE
$object configure -AddressingDisposition [lindex $res 1]
}
}
#
# Resend request
#
if {$status == 3 || $status == 4 || $status == 5} {
unset requests($rid)
if {[catch {
send_request $rid 1 $object $operation $rtype \
$plevel $params $values $exceptions
} res]} {
#
# Re-sending the request has failed, e.g., because we
# have run out of forwarding addresses. Re-instate the
# request data so that a future receive_reply will
# return the appropriate exception.
#
set requests($rid) [list $object $operation $conn $connid \
$rtype $params $values $exceptions \
2 $res]
return 2
}
return 0
}
if {$status != -1} {
unset requests($rid)
}
return $res
}
#
# Synchronous invocation of requests
#
public proc invoke_sync {response object operation rtype \
plevel params values {exceptions {}} {timeout 0}} {
incr plevel
set rid [incr reqid]
send_request $rid $response $object $operation $rtype \
$plevel $params $values $exceptions
#
# oneway ?
#
if {!$response} {
unset requests($rid)
return
}
#
# Set up id mapping
#
set reqids_completed($rid) 0
#
# Set up timeout
#
if {$timeout} {
set reqids_timer($rid) [after $timeout "::Combat::CORBA::ORB::timeout $reqid"]
}
#
# wait for reply
#
vwait [itcl::scope reqids_completed($rid)]
if {![info exists reqids_completed($rid)]} {
::corba::throw [list IDL:omg.org/CORBA/BAD_INV_ORDER:1.0 \
[list minor 0 completion_status COMPLETED_MAYBE]]
}
#
# Handle timeout
#
if {[info exists reqids_timedout($rid)]} {
unset reqids_timedout($rid)
unset reqids_completed($rid)
::corba::throw [list IDL:omg.org/CORBA/TIMEOUT:1.0 \
[list minor 0 completion_status COMPLETED_MAYBE]]
}
#
# Get reply
#
set res [receive_reply $rid $plevel]
#
# Clean up
#
unset reqids_completed($rid)
#
# Evaluate response
#
set status [lindex $res 0]
switch -- $status {
0 { # NO_EXCEPTION
return [lindex $res 1]
}
1 { # USER_EXCEPTION
error [lindex $res 1]
}
2 { # SYSTEM_EXCEPTION
error [lindex $res 1]
}
default {
::corba::throw [list IDL:omg.org/CORBA/INTERNAL:1.0 \
[list minor 0 completion_status COMPLETED_NO \
debug "status is $status"]]
}
}
::corba::throw [list IDL:omg.org/CORBA/INTERNAL:1.0 \
[list minor 0 completion_status COMPLETED_NO]]
}
#
# Asynchronous invocation
#
public proc invoke_async {response object operation rtype \
plevel params values {exceptions {}} {callback {}} \
{timeout 0}} {
incr plevel
set rid [incr reqid]
set reqids_completed($rid) 0
send_request $rid $response $object $operation $rtype \
$plevel $params $values $exceptions
if {$callback != ""} {
set callbacks($rid) $callback
}
if {$timeout} {
set reqids_timer($rid) [after $timeout "::Combat::CORBA::ORB::timeout $reqid"]
}
return $reqid
}
public proc fake_async {status result {callback {}}} {
incr reqid
set fake_asyncs($reqid) [list $status $result $callback]
if {$callback != ""} {
set callbacks($reqid) $callback
after 0 "::Combat::CORBA::ORB::callback $reqid $status"
}
return $reqid
}
public proc get_async_reply {rid plevel} {
incr plevel
#
# See if the request has already timed out
#
if {[info exists reqids_timedout($rid)]} {
unset reqids_timedout($rid)
::corba::throw [list IDL:omg.org/CORBA/TIMEOUT:1.0 \
[list minor 0 completion_status COMPLETED_MAYBE]]
}
if {[info exists fake_asyncs($rid)]} {
set res $fake_asyncs($rid)
unset fake_asyncs($rid)
set status [lindex $res 0]
switch -- $status {
0 { # NO_EXCEPTION
return [lindex $res 1]
}
1 { # USER_EXCEPTION
error [lindex $res 1]
}
2 { # SYSTEM_EXCEPTION
error [lindex $res 1]
}
}
error "oops"
}
if {![info exists reqids_completed($rid)]} {
::corba::throw [list IDL:omg.org/CORBA/BAD_PARAM:1.0 \
[list minor 0 completion_status COMPLETED_MAYBE]]
}
#
# wait for reply
#
if {!$reqids_completed($rid)} {
vwait [itcl::scope reqids_completed($rid)]
}
if {![info exists reqids_completed($rid)]} {
::corba::throw [list IDL:omg.org/CORBA/BAD_INV_ORDER:1.0 \
[list minor 0 completion_status COMPLETED_MAYBE]]
}
#
# Handle timeout
#
if {[info exists reqids_timedout($rid)]} {
unset reqids_timedout($rid)
unset reqids_completed($rid)
::corba::throw [list IDL:omg.org/CORBA/TIMEOUT:1.0 \
[list minor 0 completion_status COMPLETED_MAYBE]]
}
#
# Get reply
#
set res [receive_reply $rid $plevel]
#
# Clean up
#
unset reqids_completed($rid)
#
# Evaluate response
#
set status [lindex $res 0]
switch -- $status {
0 { # NO_EXCEPTION
return [lindex $res 1]
}
1 { # USER_EXCEPTION
error [lindex $res 1]
}
2 { # SYSTEM_EXCEPTION
error [lindex $res 1]
}
default {
::corba::throw [list IDL:omg.org/CORBA/INTERNAL:1.0 \
[list minor 0 completion_status COMPLETED_NO \
debug "status is $status"]]
}
}
::corba::throw [list IDL:omg.org/CORBA/INTERNAL:1.0 \
[list minor 0 completion_status COMPLETED_NO]]
}
public proc poll_async_reply {rid} {
#
# reqids_completed($rid) exists for all outstanding remote
# requests.
#
if {[info exists reqids_completed($rid)]} {
return $reqids_completed($rid)
}
#
# We should only get here for fake async requests, which
# are always ready.
#
if {![info exists fake_async($rid)]} {
::corba::throw [list IDL:omg.org/CORBA/BAD_PARAM:1.0 \
[list minor 0 completion_status COMPLETED_MAYBE]]
}
return 1
}
public proc cancel_async_request {rid} {
if {[info exists reqids_timedout($rid)]} {
unset reqids_timedout($rid)
unset reqids_completed($rid)
return
}
if {[info exists fake_asyncs($rid)]} {
unset $fake_asyncs($rid)
return
}
if {![info exists reqids_completed($rid)]} {
::corba::throw [list IDL:omg.org/CORBA/BAD_PARAM:1.0 \
[list minor 0 completion_status COMPLETED_MAYBE]]
}
#
# Cancel timeout
#
if {[info exists reqids_timer($rid)] && \
![info exists reqids_timedout($rid)]} {
after cancel $reqids_timer($rid)
unset reqids_timer($rid)
}
#
# Clean up
#
set data $requests($rid)
unset requests($rid)
if {[info exists reqids_completed($rid)]} {
unset reqids_completed($rid)
}
if {[info exists callbacks($rid)]} {
unset callbacks($rid)
}
#
# Inform the connection that this request is canceled
#
set conn [lindex $data 2]
set connid [lindex $data 3]
$conn cancel_request $connid
$conn deref
}
#
# Incoming invocation from GIOP
#
public proc invoke {response_expected \
conn request_id object_key \
operation decoder contexts} {
#
# gotta hand this over to an object adapter
#
::Combat::PortableServer::RootPOA::invoke $response_expected \
$conn $request_id $object_key \
$operation $decoder $contexts
}
public proc locate {conn request_id object_key} {
#
# gotta hand this over to an object adapter
#
::Combat::PortableServer::RootPOA::locate \
$conn $request_id $object_key
}
#
# Callback from GIOP connection
#
public proc callback {rid status} {
#
# Transparently try again in case of LOCATION_FORWARD,
# LOCATION_FORWARD_PERM or NEEDS_ADDRESSING_MODE. This
# retry is performed by receive_reply.
#
if {$status == 3 || $status == 4 || $status == 5} {
if {[receive_reply $rid 0] == 0} {
#
# Ok, forwarded the request.
#
return
}
#
# Forwarding the request has failed. Fall through and
# act as if the request has completed.
#
}
#
# This request has completed
#
set reqids_completed($rid) 1
set ::Combat::CORBA::ORB_conn_cond 1
#
# Cancel timeout
#
if {[info exists reqids_timer($rid)] && \
![info exists reqids_timedout($rid)]} {
after cancel $reqids_timer($rid)
unset reqids_timer($rid)
}
#
# Call user callback
#
if {[info exists callbacks($rid)]} {
set callback $callbacks($rid)
unset callbacks($rid)
uplevel #0 "$callback $rid"
}
}
#
# Callback from "after" upon timeout
#
public proc timeout {rid} {
#
# Forget everything we ever knew about this request
#
set reqids_timedout($rid) 1
set reqids_completed($rid) 1
set data $requests($rid)
unset requests($rid)
unset reqids_timer($rid)
#
# Inform the connection that this request is canceled
#
set conn [lindex $data 2]
set connid [lindex $data 3]
$conn cancel_request $connid
$conn deref
#
# Call this request's callback so that it learns about it
#
if {[info exists callbacks($rid)]} {
set callback $callbacks($rid)
unset callbacks($rid)
uplevel #0 "$callback $rid"
}
set ::Combat::CORBA::ORB_conn_cond 1
}
#
# Object Reference Handling
#
public proc MakeObjProc {obj} {
incr objprocid
set ref "_combat_obj_$objprocid"
uplevel #0 proc $ref {args} \{ \
eval ::Combat::CORBA::ORB::object_invoke $obj \$args \
\}
set refs_fwd($ref) $obj
set refs_rev($obj) $ref
return $ref
}
public proc GetObjFromRef {ref} {
if {$ref == "0"} {
return 0
}
if {![info exists refs_fwd($ref)]} {
::corba::throw [list IDL:omg.org/CORBA/BAD_PARAM:1.0 \
[list minor 0 completion_status COMPLETED_NO]]
}
return $refs_fwd($ref)
}
public proc GetRefFromObj {obj} {
if {$ref == "0"} {
return 0
}
if {![info exists refs_rev($obj)]} {
::corba::throw [list IDL:omg.org/CORBA/BAD_PARAM:1.0 \
[list minor 0 completion_status COMPLETED_NO]]
}
return $refs_rev($obj)
}
public proc ReleaseRef {ref} {
if {$ref == "0"} {
return
}
set obj [GetObjFromRef $ref]
unset refs_fwd($ref)
unset refs_rev($obj)
itcl::delete object $obj
uplevel #0 rename $ref \"\"
}
#
# Method invocation
#
public proc object_invoke {obj args} {
set idx 0
set async 0
set callback ""
set response 1
set timeout 0
while {$idx < [llength $args]} {
if {[lindex $args $idx] == "-async"} {
set async 1
incr idx
} elseif {[lindex $args $idx] == "-callback"} {
incr idx
set async 1
set callback [lindex $args $idx]
incr idx
} elseif {[lindex $args $idx] == "-timeout"} {
incr idx
set timeout [lindex $args $idx]
incr idx
} else {
break
}
}
if {!$timeout} {
set timeout [$obj cget -timeout]
}
set operation [lindex $args $idx]
incr idx
set values [lrange $args $idx end]
if {$operation == ""} {
error "usage: $refs_rev($obj) op ?parameters ...?"
}
if {$operation == "_is_a" || \
$operation == "_get_interface" || \
$operation == "_non_existent" || \
$operation == "_duplicate"} {
switch -- $operation {
_is_a {
if {[llength $values] != 1} {
error "usage: $refs_rev($obj) _is_a repoid"
}
if {!$async} {
return [$obj _is_a [lindex $values 0]]
}
set theop "_is_a"
set rtype "boolean"
set params {{in string}}
}
_get_interface {
if {[llength $values] != 0} {
error "usage: $refs_rev($obj) _get_interface"
}
if {!$async} {
return [$obj _get_interface]
}
set theop "_interface"
set rtype "Object"
set params [list]
}
_non_existent {
if {[llength $values] != 0} {
error "usage: $refs_rev($obj) _non_existent"
}
if {!$async} {
return [$obj _non_existent]
}
set theop "_non_existent"
set rtype "boolean"
set params [list]
}
_duplicate {
return [corba::string_to_object \
[corba::object_to_string \
$refs_rev($obj)]]
}
default {
error "oops"
}
}
if {$async} {
return [invoke_async 1 $obj $theop $rtype 2 \
$params $values {} $callback $timeout]
}
return [invoke_sync 1 $obj $theop $rtype 2 \
$params $values {} $timeout]
}
if {$operation == "_is_equivalent"} {
if {[llength $values] != 1} {
error "usage: $refs_rev($obj) _is_equivalent ref"
}
set otherobj [GetObjFromRef [lindex $values 0]]
if {[catch {
set res [$obj _is_equivalent $otherobj]
} err]} {
set status 2
set res $err
} else {
set status 0
}
if {$async} {
return [fake_async $status $res $callback]
}
if {$status == 2} {
error $res
}
return $res
}
if {![::Combat::SimpleTypeRepository::UpdateTypeInfoForObj $obj]} {
::corba::throw [list IDL:omg.org/CORBA/INTF_REPOS:1.0 \
[list minor 0 completion_status COMPLETED_NO]]
}
set type [$obj cget -type_id]
set opInfo [::Combat::SimpleTypeRepository::getOp \
$type $operation]
if {$opInfo == ""} {
set atInfo [::Combat::SimpleTypeRepository::getAttr \
$type $operation]
} else {
set atInfo ""
}
if {$opInfo == "" && $atInfo == ""} {
if {![::Combat::SimpleTypeRepository::UpdateTypeInfoForObj $obj 1]} {
::corba::throw [list IDL:omg.org/CORBA/INTF_REPOS:1.0 \
[list minor 0 completion_status COMPLETED_NO]]
}
set type [$obj cget -type_id]
set opInfo [::Combat::SimpleTypeRepository::getOp \
$type $operation]
set atInfo [::Combat::SimpleTypeRepository::getAttr \
$type $operation]
if {$opInfo == "" && $atInfo == ""} {
error "error: $operation is neither operation nor attribute for $type"
}
}
if {$opInfo != ""} {
set rtype [lindex $opInfo 9]
set params [lindex $opInfo 15]
set exceptions [lindex $opInfo 17]
if {[llength $params] != [llength $values]} {
error "error: operation $operation wants [llength $params] parameters, not [llength $values]"
}
if {[lindex $opInfo 11] == "OP_ONEWAY"} {
set response 0
}
if {$async} {
return [invoke_async $response $obj $operation \
$rtype 2 $params $values $exceptions \
$callback $timeout]
}
return [invoke_sync $response $obj $operation \
$rtype 2 $params $values $exceptions \
$timeout]
}
if {$atInfo != ""} {
set attype [lindex $atInfo 9]
if {[llength $values] == 0} {
if {[llength $atInfo] > 13} {
set get_exceptions [lindex $atInfo 13]
} else {
set get_exceptions [list]
}
if {$async} {
return [invoke_async 1 $obj _get_$operation \
$attype 0 {} {} $get_exceptions \
$callback $timeout]
}
return [invoke_sync 1 $obj _get_$operation \
$attype 0 {} {} {} $timeout]
} elseif {[llength $values] == 1} {
if {[lindex $atInfo 11] == "ATTR_READONLY"} {
error "error: attribute $operation is readonly"
}
if {[llength $atInfo] > 15} {
set set_exceptions [lindex $atInfo 15]
} else {
set set_exceptions [list]
}
if {$async} {
return [invoke_async 1 $obj _set_$operation \
void 0 [list [list in $attype]] $values \
$set_exceptions $callback $timeout]
}
return [invoke_sync 1 $obj _set_$operation \
void 0 [list [list in $attype]] $values \
{} $timeout]
}
error "attribute get wants 0, attribute set 1 parameter"
}
error "oops, I should not be here."
}
#
# corba::dii ?-async? ref spec args
#
# spec: [list returntype opname params exceptions]
#
public proc dii_invoke {args} {
set idx 0
set async 0
set callback ""
set response 1
set timeout 0
while {$idx < [llength $args]} {
if {[lindex $args $idx] == "-async"} {
set async 1
incr idx
} elseif {[lindex $args $idx] == "-callback"} {
incr idx
set async 1
set callback [lindex $args $idx]
incr idx
} elseif {[lindex $args $idx] == "-timeout"} {
incr idx
set timeout [lindex $args $idx]
incr idx
} else {
break
}
}
set ref [lindex $args $idx]
set obj [GetObjFromRef $ref]
incr idx
set spec [lindex $args $idx]
incr idx
if {$idx > [llength $args]} {
error "too few arguments to dii_invoke"
}
if {[llength $spec] < 3} {
error "illegal dii call specification"
}
set rtype [lindex $spec 0]
set operation [lindex $spec 1]
set params [lindex $spec 2]
set exceptions [lindex $spec 3]
set values [lrange $args $idx end]
if {[llength $spec] == 4 && \
([lindex $spec 3] == "OP_ONEWAY" || \
[lindex $spec 4] == "oneway")} {
set response 0
}
if {!$timeout} {
set timeout [$obj cget -timeout]
}
if {$async} {
return [invoke_async $response $obj $operation \
$rtype 2 $params $values $exceptions \
$callback $timeout]
}
return [invoke_sync $response $obj $operation \
$rtype 2 $params $values $exceptions \
$timeout]
}
}
}
}
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