Many important new features and bug fixes have been introduced in TAO 1.4a.
They are described briefly here. These and many other features of TAO 1.4a are
detailed in OCI's TAO
Developer's Guide, Version 1.4a, which will be available separately.
For a detailed description of the motivation for and implementation of a
particular change, see the appropriate
file in the TAO 1.4a source code distribution, such as
ACE_wrappers/TAO/DevGuideExamples/ChangeLog. Some ChangeLog
entries may include a "ticket" number (e.g.,
[RT 1234]), to help
customers track specific changes they have sponsored.
Features added and bugs/fixes in TAO 1.4a_p26
- Back-ported fix for bugzilla 3104 to fix RT 14382. This addresses long delays and excessive CPU utilization when an interval timer has to "catch up" to a far-advanced system time.
- Added ACE_HAS_RECURSIVE_THR_EXIT_SEMANTICS and ACE_HAS_AUTOMATIC_INIT_FINI to fix RT 14358.
- Fixed a problem in the reactor's notification pipe processing where it could short-read the buffer, but still end up trying to dispatch, thus leading to a SEGV when it tries to dereference through an invalid pointer.
Features added and bugs/fixes in TAO 1.4a_p25
- Initial backporting of support for building for a VxWorks 6.7 target from OCI TAO 1.6a. As a consequence of the backporting, perliminary support for other VxWorks 6.x targets was added. Only VxWorks 6.7 has undergone testing, and it is incomplete. NOTE: At minimum, Service Pack 1 is required for many ACE features to work properly. Under stock 6.7 too many tests simply crash.
- Support for Sun CC 5.10, fixing Bugzilla #3733.
- Various fixes/workarounds for Visual Age 8, VxWorks 6.2, HPUX, Sun Studio 1.
- Fixed a SEGV caused by ACE_Log_Msg where ACE threads inheriting from non-ACE threads.
Features added and bugs/fixes in TAO 1.4a_p24
Added support for the upcoming OpenDDS 1.3 release.
Fixed DOC bugs 3393 and 3480.
Fixed DOC bug 3078.
Added global operator< definition for TAO_String_Manager to support string type key comparison in OpenDDS.
- Made TAO_IDL always compare full path instead of preprocessor generated path to avoid preprocessor dependency. (RT 12461)
- Fixed memory leaks in the SSLIOP implementation. (DOC bug 3165)
Features added and bugs/fixes in TAO 1.4a_p23
Extended the Win32 environment variable handling
improvement from p22 to also allow inheriting a large
environment block from the spawning (parent) process.
Modified the ImR Activator to allow a user-specified
maximum number of environment variables passed to the
activated server. This is specified with -m, and it
was previously hard-coded to 512.
Features added and bugs/fixes in TAO 1.4a_p22
Added a method to the ACE_Process class to
enable the use of a UNICODE environment when
spawning processes on Windows only. This works
around a 32Kb environment buffer limit.
Modified the ImR Activator to utilize the
UNICODE environment when spawning servers.
Added support for VxWorks 6.3 and VxWorks 6.4.
Added ACE_Stack_Trace class to allow users to obtain a stack trace within
their application on supported platforms. A new conversion character, the
question mark, was added to ACE_Log_Msg for stack trace logging.
Features added and bugs/fixes in TAO 1.4a_p21
Fixed a bug in the AV Streams core that caused problems with multi-stage
Added a method to the ACE namespace to get the fully qualified host name.
Generated GNU makefiles for statically linked executables will no longer
be generated with both -lfoo and libfoo.a in the link line.
Features added and bugs/fixes in TAO 1.4a_p20
Fixed send side logic (both synchronous and asynchronous) to honor timeouts. An RTT enabled
two-way or one-way invocation could earlier hang indefinately if tcp buffers were flooded.
Features added and bugs/fixes in TAO 1.4a_p19
- Added fixes for VxWorks 6.2 RTP
- Multiple Notification Service bug fixes
Features added and bugs/fixes in TAO 1.4a_p18
Fixed a hanging issue in persistent Notify Service during disconnection.
Fixed bugzilla bug #2548. The OMG spec says that GIOP request messages invoking
a no-arg method should not be packed for alignment. However TAO used to align
them. This patch fixes the problem.
Features added and bugs/fixes in TAO 1.4a_p17
Added a -e option to the ImR_Activator to set the
environment buffer length for activated servants.
Fixed a bug in the Trading_Service where the
introduction of the CORBA::LongLong broke the
The TAO_IORManip library now has a filter
class that allows users to create new object
references based on existing multi-profile
object references by filtering out profiles
using user defined criteria. The use of
-ORBUseSharedProfile 0 is required for this to
Changed the Notify Event Channel POA to be
persistent to allow restarting the
Notify_Service on the same host and port to
have the same IOR as a previous run.
Changed the idl compiler to accept #line pragmas put
in by the C preprocessor that have numbers after
the file name.
ACE/TAO now supports Sun Solaris 10 on Opteron or
X86-64 using Sun Studio 11 (SunCC 5.8) in 64-bit mode.
Previous versions only supported 32-bit mode (the
default for Sun compilers). ACE/TAO does not support
Sun Solaris 10 on Opteron or X86-64 using Sun Studio
10 (SunCC 5.7) in 64-bit mode.
ACE/TAO running Sun Solaris 10 on x86 (including
Opteron or X86-64) will likely require the define
"#define ACE_HAS_BROKEN_STATIC_CONSTRUCTION" in
the config.h file. The sparc version does not
require this define.
Enhanced TAO_IDL's support for OpenDDS. This version of
TAO is compatible with OpenDDS 1.0. See
Features added and bugs/fixes in TAO 1.4a_p16
Corrected bugs related to IPv6, and also related to timer queues.
Corrected bugs related to sending/recieving large requests. Improved the ORB
robustness in low-memory situations by strenghtening the checks and eliminating
possibilities for memory corruption.
Added an OCI preamble to the README file describing the support proceedures for
OCI distributions of ACE and TAO.
Fixed bug inOut_Var_Array_SArgument_T<>::marshal() that did not use
correct type to output to CDR stream. This resolved compilation errors when
using array of non-primary data type as out parameter.
Fixed bug in DynamicAny that did not fully support DynAny from longdouble.
Fixed bug in DynamicAny that did not check if member is nil before accessing
the member. This resolved access violation when destroying DynAny from a union
with no active member.
Fixed bug in TAO_DynEnum_i that get_as_string/set_as_string and
get_as_ulong/set_as_ulong methods did not strip the alias to find the member
information. This resolved the problem when calling these functions for
typedef'd enums encapsulated in structs.
Fixed bug in TAO_IDL compiler that did not generate the correct key comparison
for DDS when the DCPS key is an array.
Fixed a bug in the IORTable where it was possible to cause a process crash if
it were used before it were open or after it was closed.
Added an option, -a, to the RT Event_Service to use the thread-per-consumer
dispatching strategy instead of the default dispatching strategy.
Added new macro ACE_DEFAULT_ASYNCH_BACKLOG and used it instead of
ACE_DEFAULT_BACKLOG in Asynch_Acceptor to resolve problem of the backlog be set
to a huge value on Windows.
Features added and bugs/fixes in TAO 1.4a_p15
Corrected a minor bug where CORBA::ULongLong and CORBA::LongLong types could
not be exported to the CosTrading Service.
Features added and bugs/fixes in TAO 1.4a_p14
Fixed RT 8881, a problem in the Notification Service's
option where nested upcalls still could occur and could create a deadlock. See
Tue Nov 21 23:55:52 UTC 2006 Chris Cleeland
for more details.
Corrected a bug in the Select/Thread Pool reactor where an ACCESS VIOLATION
would occur on Windows due to an event handler not being associated with a file
handle passed to the method that removes an evant handler from the set.
Added a work-around for bug in SunCC 5.3 where a core dump would result when
the destructor of an ACE_Process_Mutex would run.
Building ACE and TAO in single-threaded mode with gcc is now supported.
Provided a hook to allow users to enable the conversion of a local objext (such
as a Smart Proxy) into an IOR.
Fixed issues relating to the CosTrading Server library. The constraint language
lexer now allow negative floating point values, 64-bit signed and unsigned
integers (which can currently be represented as octal or decimal). Also, fixed
a bug where negative integers were being stored and compared as unsigned
integers which resulted in -3 > 0 evaluating to true.
Added support for building ACE as a shared library on VxWorks RTP.
Added ace/config-vxworks6.2.overrides.h, which fixes an incorrect type in the
WindRiver header files for VxWorks 6.2 RTP and corrects a hang in select()
issue on that platform.
Fixed IDL-generated code that compiled incorrectly when a valuetype is used in
either a bound sequence or in a union.
Features added and bugs/fixes in TAO 1.4a_p13
Resolved an interoperability/marshaling bug causing Orbacus client to throw
java.lang.OutOfMemoryError instead of the correct CORBA exception provided by
the server. The problem occurred when TAO-based server's reply contained an
exception (CORBA::MARSHALING, in this particular case but others may have been
Added support to ACE for Green Hills INTEGRITY 5.0.7.
Some embedded platforms, such as INTEGRITY, have a way to use real memory as
shared memory, but not in the ways currently provided by ACE, such as MMAP or
SYSV shared memory which has a disk backup. Instead, the memory is predefined
to the system outside of the C++ source code, in INTEGRITY, through integrate
files, used by an integrate step during the build process.
I've created a wrapper to use the shared memory available on INTEGRITY. It is
embodied in a class named "ACE_Fixed_Shared_Memory_Pool" that is used with
ACE_Malloc_T just as the MMAP or SV classes would be.
The shared memory is defined in the integrate files, for example
This section can be in the kernel or any other Virtual Address Space (VAS) that
is loaded on the system. The "Clear" word insures that the memory is initially
zeroed and that fact is used by ACE to know to initialize it on first use.
Virtual Address Spaces use the shared memory by including this in their
integrate files, for example.
The "First" and "Length" are constants that are used in the application code to
map to the shared memory with the new class "ACE_Fixed_Shared_Memory_Pool" as
The "First" address is the virtual address in this VAS. It can be different in
each VAS and, if it is, then the ACE_PI_Control_Block must be used. But, if
"First" is chosen the same in all the VASs using it, then the ACE_Control_Block
can be used for efficiency.
The ACE_Based_Pointer can be used with almost all platforms and it works with
the ACE_Fixed_Shared_Memory_Pool as well.
The ACE_Fixed_Shared_Memory_Pool is used in a program by defining an
ACE_Fixed_Shared_Memory_Pool_Option object with the address given in "First"
and the size given in "Length". This object is then passed to the ACE_Malloc_T
constructor, for example:
// Create a shared memory pool on INTEGRITY
const int shr_size = 4096;
char *shr_pool = (char*) 0x7000000;
ACE_Fixed_Shared_Memory_Pool_Options myOPT(shr_pool, shr_size);
ACE_Malloc_T myPool(myFile, 0, &myOPT);
Notes on example:
The 4096 is the value of "Length"
The 0x7000000 is the value of "First"
myOPT is the option object unique to ACE_Fixed_Shared_Memory_Pool
ACE_FIXED_SHARED_MEMORY_POOL is an ACE macro that relates to
The first arg to the ACE_Malloc_T ctor is for compatibility and is mostly
ignored. My suggestion would be to set it to the "Name" of the shared memory to
help subsequent programmers to see how the code and integrate files are
The 0 in the second arg to the ACE_Malloc_T ctor is the name of the lock and is
The third argument to the ACE_Malloc_T ctor is the one that is used by
ACE_Fixed_Shared_Memory_Pool and, if not supplied, defaults to addr=0 and
length=1MB. The defaults are bad, so be sure to always supply this argument.
Enhanced a debug message printed when the connector encounters an error due to
a mismatch between QoS policies and a lack of tagged components in the IOR.
This message is printed whenever the debug level is greater than zero.
Added support for Windows Mobile 5.0 with VC8.
Enhanced support for CORBA::LongDouble on platforms that do not have a native
16 byte long double. The CORBA::LongDouble will store native long doubles in
the 128-bit IEEE format and will convert to a long double on demand. There will
be truncation of precision due to the limits of the native long double.
Fixed an issue where setting a policy override on a collocated object resulted
in an invalid object reference being returned.
Fixed a memory leak where the TAO_Adapter would be leaked in the event that an
exception occurred before the adapter was added to the adapter registry.
Features added and bugs/fixes in TAO 1.4a_p12
Added support for 64-bit builds in Sun Studio 11 (Sun C++ 5.8), Sun Studio 10
(Sun C++ 5.7) and xlc_r version 6.0.
Fixed an issue in the TP_Reactor where a properly handled OS signal could
randomly break the reactor event loop. In a TAO application, this resulted in
the ORB event loop exiting with an error code.
The timed semaphore feature added in p9 is now disabled by default due to the
negative performance impact. It must now be manually enabled by defining the
ACE_HAS_POSIX_SEM_TIMEOUT_EMULATION macro in $ACE_ROOT/ace/config.h.
Corrected build errors that resulted when trying to build the RT Event
Service's "Thread per Consumer" dispatching strategy, which was added long ago
but got ignored for adding release notes. This strategy is similar to the MT
dispatching strategy in that it separates the thread that receives the push()
from a supplier from the thread that does the eventual push() to the
consumer(s), but it differs from MT in that MT has a pool of threads pulling
from a single queue and ultimately potentially servicing every consumer,
whereas TPC has a queue for *each* consumer and, thus, a single thread is
dedicated to pushing to that consumer. This insures that a badly-behaved
consumer CANNOT have an adverse effect on the channel or supplier.
Added a means by which an application of the RT Event Service can specify what
the RTEC should do if the
TAO_EC_Queue fills up. This behavior is
encapsulated in a derivation of an
The RTEC looks for a service object of a particular name (default in macro
Several minor issues related to use of IPv6 in IIOP endpoints are cleaned up.
These include improvements to the discovery of interface endpoints and the
processing of explicit wildcard addresses such as [::] or 0.0.0.0.
Fixed a bug in IDL generated code where a union contains a complex data type
that can have a default value. When the _default() method is called, it now
calls _reset() before setting the value. Previously, if the union value was a
complex data type, that memory would be leaked.
Fixed a deadlock in the TAO core. This occurred when a client passed back to
the server a collocated reference (on the same server) to an object that was
initially referenced via corbaloc semantics.
This showed up in the Naming Service tests where a client initially resolves
the root context via corbaloc. A later attempt to point a context back at the
root resulted in the deadlock.
Features added and bugs/fixes in TAO 1.4a_p11
Using the 'RW' wait strategy can result in leaked file descriptors, leaving
sockets in a CLOSE_WAIT state (See
bugzilla 2224 for more info). A new client strategy option "
0|1" has been added to actively detect and close out any connection
in a half-closed state. This option requires the ORB to be run, which isn't a
problem in servers and mixed clients. Pure clients can either spawn a dedicated
ORB thread or occasionally run the orb via
Added preliminary support for Mac OS X on Intel hardware. Use
Fixed bugzilla bug #2604, which is a problem with the Implementation Repository
(ImR, ImplRepo) when using PER_CLIENT activation. The symptom of this bug is
failed activation. See
Fixed an apparent memory corruption error in the Notification Service that was
seen only in Visual Studio 2005 (Visual C++ 8.0) builds. The error caused
clients to receive a CORBA::UNKNOWN system exception when they called either
ConsumerAdmin::obtain_notification_push_consumer(). The fix involved moving a
call to an internal function within the scope of a guard.
Features added and bugs/fixes in TAO 1.4a_p10
In some situations, using the SunCC compiler can cause strange results during
static initialization of the ACE_Static_Object_Lock. A work-around for this has
been added to ACE and can be enabled by defining the
ACE_HAS_BROKEN_STATIC_CONSTRUCTION macro in your config.h.
Fixed a bug where collocated objects that were stored in the IOR Table would
not be properly initialized.
Added a new option (-b) to tao_idl which controls the use of clonable in
arguments on oneway calls. Clonable in arguments are only useful to
applications using CSD and collocated oneway calls.
Added more support for IPv6. This includes TAO/IIOP and also fixing bugs on
Fixed a bug where Bidirectional GIOP would fail to function properly on AIX and
MacOS X due to a difference in sockaddr_in.sin_len during a comparison done
while setting up connections.
Fixed a bug where shutdown of an RTCORBA enabled application may have core
dumped due to use of already deleted memory.
Added TAO optimizations including using array allocated octet sequences when
constructing ObjectId's to avoid memory allocations, separating the ref count
from the initialization lock on a CORBA::Object to be able to use an
ACE_Atomic_Op for reference counting and using a stack allocated ACE_Data_Block
during processing a GIOP request to avoid memory allocations.
TAO now correctly recognizes and responds to a GIOP CloseConnection message.
A verification test,
Fixed a problem where, on Solaris 9 onwards, calling
more than 215
(65535) times in a process will fail. See changelog entry from "Wed Jun 7
16:13:59 UTC 2006 Chris Cleeland <email@example.com>" for more
Fixed dynamic library loading on Mac OS X 10.4 (ace/config-macosx-tiger.h).
Made the Upcall_Wrapper::upcall() check if the number of "IN"
parameters that client provided for a DII collocation request is
the same as the IDL defined. A BAD_PARAM exception is raised when the
condition is false.
Features added and bugs/fixes in TAO 1.4a_p9
Added new command line and service configurator option to the Notification
-UseSeparateDispatchingORB. Using this option employs
a second ORB for dispatching events, thereby avoiding the potential for
servicing new requests in the same thread that is dispatching events (sometimes
known as "nested upcalls").
Added an inline default constructor on
class to avoid the costly construction of dummy input and output cdr's when
cloning the request.
Fixed a bug where the use of the
option on tao_idl would cause compilation errors if an idl method contained a
reference to an interface.
Added performance improvements including, but not limited to, an
specialization in SPARC assembler, an unrolled implementation of memset when
ACE_HAS_SLOW_MEMSET is #defined, removal of a redundant
in the union constructor of idl generated code, replacement of thread mutexes
in TAO used for reference counts with ACE_Atomic_Op.
Fixed bugs in the Service Configurator Lexer where line numbers were not
counted correctly and strings were not allowed to contain nested quotes (as the
original lexer did).
Added support for building ACE and TAO for VxWorks 6.2 in kernel mode.
Added emulated support for a timed semaphore acquire() on HP-UX.
Fixed a race condition triggered by SSLIOP in which two threads active on the
same connection attempted to read from the same socket buffer. The
test case provokes the problem.
Added a new option,
-ECDispatchingThreadFlags, to the Real Time
Event Service's default factory so that flags used in the creation of
dispatching threads can be specified in the service configurator file.
Previously, the flags used hard-coded defaults. See
for more information on how to use this option.
Added two new options,
to the CosEvent_Service's factory. These options extend the reactive control
feature to allow the event channel to detect a client (consumer or supplier)
that's hung in a remote operation such as push(). See
for more information on how to use these options.
Added a new command-line switch
to the CosEvent_Service executable. This switch enables callbacks upon
disconnections. Previously this feature was only available programmatically.
Adding IPv6 support to Endpoints, IOR parsers, IIOP and MCAST classes is in
work. This feature currently is not fully tested.
for (preliminary and untested) Mac OS X 10.4 "tiger".
Features added and bugs/fixes in TAO 1.4a_p8
Fixed several memory leaks. Failing to open the default endpoint, shutdown of
an ImR-ified server with an -ORBDebugLevel of 1 or higher and extracting
multiple times from a CDR into the same CORBA::Any are all situations that
would have caused a memory leak.
Fixed a bug where a pointer to a PICurrent_Impl was referenced after it had
been deleted. This would manifest itself as an access violation during server
exit on Windows.
Provide better support for builds with native c++ exceptions disabled. Support
for non-native c++ exceptions is not complete, but most TAO tests will run
successfully. Support for non-native exceptions in the DOC betas is deprecated
and will be unsupported in the next release unless a sponsor steps forward.
TAO 1.4a now builds with the Borland 5.5.1 compiler.
Remove trailing whitespace for const wstring's within the tao_idl compiler, as
is done for const string's.
The TAO_FixedSeq_Var_T and TAO_VarSeq_Var_T now provide a const  operator.
The Trading Service can now be accessed through a corbaloc as a parameter to
the -ORBInitRef option.
The -mlongcall option is now automatically added when building for VxWorks with
a PPC CPU target.
Added support for setting the socket option, SO_KEEPALIVE on IIOP connections.
This may be done either through the spec compliant mechanism of using an RT_ORB
instance to create a protocol policy using RTCORBA::TCPProtocolProperties with
the keep_alive attribute set true or using the TAO specific command line
option -ORBKeepalive [0|1].
Features added and bugs/fixes in TAO 1.4a_p7
Fixed an order-of-destruction/resource-ownership issue, which was causing a
TRAP/SEGV on AIX and had to do with using a mutex that had already been
This patch provides support for AIX 5.3 using the XL 7.0 compiler.
A memory leak dealing with DII string arguments was cleaned up, along with many
memory leaks in the TAO_RTScheduling library.
The Fault_Notifier will now run properly when linked statically.
The TAO_PortableServer library will now compile when Minimum CORBA is enabled.
Issuing "gmake clean" will now correctly remove all object files regardless of
whether the source file contains a relative path or not.
All ACE_SSL_SOCK_Stream objects now set the SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER
on the underlying SSL handle. This may help in situations where a retry occurs
on a send() where partial data has been sent in the underlying ssl
With this release, we no longer generate SSL related projects. If you need the
SSL related projects, you can create a
before you run MPC.
Previous to patch 7, debug and release builds existing in the same build tree
on Windows could create indeterminate crashes when running debug application
executables. The dynamically loaded TAO codeset library would always load
'release' regardless of the application's build style. All patch 7 library
dynamic loads will now search for the version with the matching build style of
The tao_imr tool will now default to the localhost activator on server
add/update if an activator was not previously set for that server and a startup
command is provided.
The Interface Repository will now correctly handle interface inheritance.
Previously, sub-interface attributes would not be found in the interface
For FT applications, the ORB will not reset the profiles upon a communication
failure exception when the FT service callback indicate a restart. This fixes
Modifications made to compile on HP-UX 11.00 with aCC 3.37. Changes are
specific to not-ACE_HAS_STANDARD_CPP_LIBRARY, ACE_LACKS_IOSTREAM_TOTALLY and
Added support for the ORBInitInfo_3_1 local interface, which allows Portable
Interceptors to be registered along with a list of policies. Support was also
added for the PortableInterceptor::ProcessingModePolicy, which can be used when
registering server or client request portable interceptors using the
ORBInitInfo_3_1 operations. The ProcessingModePolicy is used to identify the
request context(s) under which the associated portable interceptor should
become involved. There are three choices: LOCAL_AND_REMOTE, LOCAL_ONLY, and
REMOTE_ONLY. The term "LOCAL" actually means "collocated". The ORBInitInfo_3_1
local interface and the ProcessingModePolicy are both defined in the CORBA 3.1
Fixed a bug in the server request portable interceptors logic that only
occurred when dispatching a collocated (thru_poa) request. The operation
arguments, accessible by the PI interception point methods, were bogus (never
initialized) values. The test located under the
TAO/tests/Portable_Interceptors/Collocated/Dynamic directory showed the bogus,
uninitialized argument values displayed on the screen. With this fix in place,
the test now displays the proper argument values.
Fixed a bug in CORBA::Request::send_oneway() for collocated requests. The
problem is the server side uses incorrect argument list from client. Note the
invoke() and send_deferred() have not been fixed for the collocated requests.
Features added and bugs/fixes in TAO 1.4a_p6
Added a new endpoint selection strategy to the TAO_Strategies library. Called
the Optimized Connection (OC) Endpoint Selector Strategy, this improves client
performance when presented with an IOR containing multiple endpoints, some of
which may be non-routable. The OC endpoint selector is loaded via a Service
Object, the OC_Strategy_Factory. Dynamically linked applications should use:
dynamic OC_Endpoint_Selector_Factory Service_Object * TAO_Strategies:_make_TAO_OC_Endpoint_Selector_Factory ()
This directive takes an optional timeout parameter,
where nnnn is a number of milliseconds to wait before deciding an endpoint is
Removed the dependency upon the TAO_Messaging library (and the libraries upon
which it depends) for the TAO_CosNaming_Serv and TAO_CosEvent_Serv libraries
when CORBA Messaging is disabled. The 'corba_messaging' feature must be
disabled (in default.features) in order to take advantage of this footprint
A new codeset translator was added to TAO to convert from UTF16 to UCS2. This
translator can be dynamically loaded using the service configurator.
dynamic UTF16_UCS2_Factory Service_Object * UTF16_UCS2:_make_UTF16_UCS2_Factory () static Resource_Factory "-ORBWCharCodesetTranslator UTF16_UCS2_Factory"
Fixed the problem where a smart proxy's destructor
would not be called. A reference counting mechanism is used to manage the smart
proxy objects however the default implementation for _add_ref() and
_remove_ref() are no-ops. Having the TAO_Smart_Proxy_Base inherit from
TAO_Local_RefCounted_Object provides an implementation for these methods and
therefore allows smart proxy objects to be deleted. This also fixes a crash
resulting from an _non_existent() function call.
Added new IIOP and SSLIOP option
to unset socket level option SO_REUSEADDR. On *some* platforms this has the
side-effect of disallowing two servers from listening on different interfaces
of the same port. This option *should NEVER be normally used* and when used the
user should be careful of any platform specific side-effects.
Refactored the CSD feature support, supported
dynamical loading of TP_Strategy by the Service Configurator and supported
optionally turn on or off servant serialization for TP_Strategy.
Fixed bugs introduced by the changes of
TAO_Tagged_Components::get_component() returns index+1 instead of always return
1 if there is a matched tag.
Features added and bugs/fixes in TAO 1.4a_p5
Refactored ACE/TAO wide character support. TAO now
requires ACE_HAS_WCHAR to be set.
Notification service no longer leaks or crashes
events if consumers die.
Fixed the problem that different HP-UX 11i variants
don't support both PTHREAD_SCOPE_PROCESS and PTHREAD_SCOPE_SYSTEM at the same
Disabled ACE_RCSID by default. If for some reason
you need ACE_RCSID,
#define ACE_USE_RCSID to 1 in your config.h.
Moved codeset negotiation support out of the core
TAO library and placed it in a separate library,
library is dynamically linked in if an application uses the resource factory to
explicitly define a native codeset or define codeset translators, and does not
-ORBNegotiateCodesets 0 to ORB_init. Statically linked must
now explicitly link the codeset library and add
"tao/Codeset/Codeset.h" to a source file in their application in
order to use codeset negotiation. a new mpc feature, negotiate_codesets, may be
TAO_Codeset to an application's link line.
Completed Typed Event Channel implementation. Now there is an example for the
Typed EC in the
DevGuideExamples/EventServices/OMG_TypedEC to show
how to use it.
Added support for the new Custom Servant Dispatching (CSD) feature. The CSD
feature provides user applications with the ability to implement and "plug-in"
custom strategies to handle the dispatching of requests to servants.
A concrete CSD Strategy implementation has also been added to serve as a
"reference implementation". This is being called the CSD Thread Pool
Strategy (TP_Strategy). The TP_Strategy provides a means to decouple the
threads (ORB threads) that receive requests from the underlying transport from
the thread that will ultimately dispatch the request to the target servant
object. The TP_Strategy implements a "request queue" as the integral part
of the mechanism that allows an ORB thread to "hand-off" a request to one of
the TP_Strategy object's worker threads. The TP_Strategy reference
implementation is provided as an example of how a concrete CSD Strategy could
Below is some example application code showing how a TP_Strategy object can be
created and applied to a POA:
PortableServer::POA_var poa = ...; // create the poa.
// Create a new TP_Strategy object and save it into a "smart pointer" variable.
TAO::CSD::TP_Strategy_Handle csd_strategy = new TAO::CSD::TP_Strategy();
// Tell the strategy to apply itself to the poa.
if (csd_strategy->apply_to(poa.in()) == false)
ACE_ERROR((LM_ERROR, "Failed to apply CSD strategy to the poa.\n"));
The CSD feature, as exists in p5, will be undergoing API changes soon.
Changed to disable TAO_USE_LOCAL_MEMORY_POOL by
default to match the setting from 1.3a. This setting controls whether a cached
allocator is used for CDR input and output streams. Most platforms work better
with this disabled, which causes normal heap allocation to be used. To
re-enable this feature, simply add
#define TAO_USE_LOCAL_MEMORY_POOL 1
Added a new tao config setting
TAO_RESET_OUTPUT_CDR_AFTER_SEND. TAO can appear to have a memory leak due to
the default behavior of the output CDR streams, which grow to fit the largest
buffer size needed. Add #define TAO_RESET_OUTPUT_CDR_AFTER_SEND 1 to config.h
to cause TAO to release the output CDR buffer after each use. Unfortunately,
there is currently a thread-safety issue, so this setting is disabled by
default. Symptoms of enabling this setting are lockups or infinite loops within
TAO with multi-threaded processes.
Features added and bugs/fixes in TAO 1.4a_p4
Features added and bugs/fixes in TAO 1.4a_p3
The size of the skeleton code generated by tao_idl
has been decreased dramatically. The skeleton refactoring performed by the DOC
Group has been merged into TAO 1.4a. Much of the repetitive code that was
generated by the idl compiler has been factored back into the TAO and
Strip a trailing carriage return read from an IOR
file. This allows IOR files written by Windows to be read by Non-Windows
The tao_idl compiler was modified to emit guards
around template specializations such that they are unique only by the type and
file name. This allows multiple idl generated cpp files to be combined into one
for quicker compilation.
There is a known problem related to DLL export linking on VC7+. It occurs when
an exported class is derived from a template. Newer versions of VC++ require
you to export the template instantiation in this case, but this can be
problematic with generated code. This leads to several commonly seen errors
when trying to build DLLs that import symbols from other DLLs (such as
TAO.dll). We're still trying to understand the problem, and hopefully a
complete solution will be discovered for a future patch release.
Features added and bugs/fixes in TAO 1.4a_p2
The IDL compiler now supports the -Gdcps option.
This option generates serialization and key support code required for using IDL
types with TAO's Data Distribution Service (DDS). TAO's DDS implementation is
not included in this patch, but is available as a separate download.
Merged a change from the DOC Group repository to fix
an interoperability issue with BiDirectional GIOP.
Better support for building for VxWorks on a Windows
host without Cygwin.
Modified the Service Configurator to correctly
support UTF-32, UTF-16, UTF-8 and ASCII character sets.
Added support for SunCC 5.6, and Visual C++ 8.
The 'borland' project type has been removed. Use the
'bmake' project type if you need to build ACE or TAO with the Borland compiler.
Fixed an issue preventing the use of bi-directional
GIOP over SSLIOP.
-x option to catior that
-f except that it reads the IOR from standard input
rather than from a file. This makes catior much more like the unix "cat"
command, and enables it to be used in a pipeline.
Changed the precedence rules for the
-ORBEndpoint) so that the host identifier (either hostname or
IP address) that appears in IIOP profiles is determined thus:
value for hostname in
whatever TAO magically comes up with based on system
A new test (
verifies the operation of this feature.
Changed the way that Bidirectional endpoint processing happens when
1 is in effect. The previous behavior always used the setting of the
receiver, but that caused problems when the sender and receiver were not using
the same dotted decimal addresses setting. Bidirectional endpoint processing
now uses whatever the sender provides as the hostname since that's also what
will be in that sender's IORs. See ChangeLog entry from
Wed May 25 12:10:40 2005 Chris Cleeland
for more details.
Added support for bounded strings in IDL, e.g.,
The Notification Service has had extensive changes
to eliminate leaks and enable features.
Managed object/thread lifespan to eliminate event,
servant, and thread leaks.
Corrected deadlocks associated with mutex reuse.
Enabled and repaired Discard, Ordering, and Blocking
The Implementation Repository (ImR) has undergone
Startup and shutdown options have been added.
Enabled ImR shutdown via Ctrl-C (Windows support was enabled, which also enables Ctrl-C
shutdown for the Naming Service on Windows).
The user no longer needs to supply the
-ORBInitRef ImplRepoService=... command line options for
registered servers as the ImR_Activator automatically adds the corresponding
environment variables to processes it launches.
Added repository store clear option.
The ImR now correctly escapes special characters in
the XML persistence file. (e.g. > becomes >)
Ported the -ORBPreferredInterfaces option from TAO
1.4 to allow specifying which local interface to use when connecting to a
specified remote interface.
The above command causes TAO to use the first
interface starting with 127 (e.g. 127.0.0.1) when connecting to any address
starting with 192.168.*, and to use the first interface starting with "132."
when connecting to any host that ends in objectcomputing.com. T
The argument specified on the left side of the equals sign must match the
target host, which usually comes from an IOR. For example, if an IOR contains
test.theaceorb.com then this would not match either of the above directives,
even if test.theaceorb.com happens to be at 192.168.1.10.
ACE_String_Base (ACE_CString, ACE_WString, etc) has
been updated for efficiency especially with respect to string concatenation.
Features added and bugs/fixes in TAO 1.4a_p1
Improved/additional platform support, including HPUX
and some work with VxWorks and Lynx.
Many improvements to the ACE/TAO test suite have
been made and this version has undergone much more extensive testing.
The portspan option is now supported in SSLIOP.
Fixed retry issues in SSLIOP when non-blocking IO is
used by setting the SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER option.
Fixed a memory leak resulting from incorrect
reference count management in the corbaloc parser.
Fixed a problem affecting the ability of SSL-based
TAO servers, which require client authentication to work with JSSE-based Java
Added new service configuration options to the
-SSLCAFile FMT:file - allows explicit
specification of the the Trusted Certificates location. The FMT is either "PEM"
or "DER". Similar to verify(1) -CAfile option.
-SSLCAPath directory - allows explicit
specification of the directory, where the Trusted Certificates are located. The
directory must be in a particular format - see openssl(1) fom more details on
how to install additional CA certificates. Similar to verify(1)
-SSLRand file1:file2:.. - allows
specification of additional sources of randomness (entropy). The option mimics
-rand option on
genrsa(1), for example.
A new ORB option was added,
which only affects the IIOP transport. If a linger timeout is specified, it
will be applied to each TCP socket prior to closing the connection.
Load Balancing support was added for MacOS X.
Enhanced SCTP and SCIOP usability in ACE and TAO
Many changes were made to the ImR for this release,
and the resulting performance and features are better than ever.
PER_CLIENT activation now works correctly.
Fixed race conditions during activation for all
Switched to an AsyncStartupWaiter within the ImR,
rather than waiting across the ImR/Activator processes.
Simplified Activator to a single IDL operation, and
removed unneeded AMH.
Organized and clarified output messages.
Fixed several memory leaks.
Added support for using an IORTable in a server with
multiple objects per POA.
Changed the default startup timeout to 60 seconds,
because the old default timeout of "disabled" is not safe.
Changed the ping behavior. We used to ping a server
once a second until a status could be determined, and now we ping with an
increasing delay on a schedule, allowing the most common cases to finish much
A new method in TAO_POA was added to support
creation of direct object references in a server that has specified -ORBUseIMR
1. This should be used when creating the object reference for the IORTable to
avoid an extra level of indirection. If PER_CLIENT activation is used, then
this is mandatory, or two servers will be started for each client invocation.
You can now specify -n when starting the activator,
allowing multiple activators to run on a single machine. (Primarily for testing
You can now change the activator for a registered
The startup timeout, and ping timeouts now work
The ImR and Activator now use persistent POAs.
Fix a problem with RT Notification that was
preventing the event forwarding from working because a virtual function was not
Fixed a problem parsing strings that did not end
with /<objkey> thus requiring the default object key.
Array optimization is disabled on aCC 3.57 and 3.60.
Fixed a deadlock condition in the ACE_Thread_Manager
where two threads calling wait() will block forever waiting for each other.
Fixed an issue that arose within the static builds
on Windows. The ACE_Thread_Mutex static data member of the
class was being used (in the
before it was statically initialized.
Fixed the HTBP where the remote peer is on a host
that does not have a DNS entry for its published endpoint.
Support for multiple IIOP endpoints in a single profile.
Pending bugs/fixes in TAO 1.4a
Features added to TAO 1.4a since TAO 1.4.3
Improved thread-specific storage memory management.
Improved handling of wide character types in Anys.
SSLIOP connection caching improvements
Improved JDK ORB interoperability with wide
Improved processing of GIOP messages on slow networks (aka parse_magic_bytes)
Features added since TAO 1.3a as part of TAO 1.4.3
Refactored and improved client-side code results in
a drastic reduction to client-side IDL compiler generated code.
The C++ header files in TAO have been refactored to
minimize the inclusion of code when compiling. These changes have the effect of
decreasing build times and reducing dependencies, but may require the addition
#include directives to application code.
The most popular ORB services (Naming, Notification,
Trading, Event, Logging) have had their libraries split into separate libraries
for stub, skeleton, and implementation libraries. Applications that use these
services need to link to the new libraries.
The Valuetype, IOR Interceptor, and Object Reference
Template features have been split into separate libraries. Applications using
these features need to link these libraries.
The IDL compiler now places inline functions in
files instead of
The OMG-defined SCIOP protocol support, which uses
SCTP as its transport, is now supported by TAO.
A new HTIOP protocol was added to TAO.
The Component Integrated ACE ORB (CIAO), a CORBA
Component Model implementation, was added. The CCM Deployment and Configuration
specification has also largely been implemented.
RTCORBA 2.0's dynamic scheduling is now implemented.
TAO now supports CSIv2 (Common Secure
Interoperability version 2).
Added support for FT CORBA specification features.
CORBA::Any implementation improvements
fix some bugs, improve performance, and reduce footprint.
TAO's valuetype support is improved.
AMH support is improved.
Important bug fixes since TAO 1.3a
Many bugs have been fixed or work-arounds provided since TAO 1.3a. For more
details, see the release announcements for the intervening DOC group beta kits
(from 1.3.2 to 1.4.3), the ChangeLogs, and the DOC group Bugzilla bug database
found at http://deuce.doc.wustl.edu/bugzilla/index.cgi.