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Avoid allocations #211

Merged
merged 4 commits into from
Jun 21, 2018
Merged

Avoid allocations #211

merged 4 commits into from
Jun 21, 2018

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MiguelCompany
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This is an improvement over #207 that removes allocations on more cases, including rmw_serialize.

I am rebasing #203 on top of this one, so if this one gets merged the other will be easier to review and merge.

It is passing the tests locally, so I hope it can make it into bouncy

@dirk-thomas dirk-thomas added the in review Waiting for review (Kanban column) label Jun 20, 2018
@MiguelCompany MiguelCompany mentioned this pull request Jun 20, 2018
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Karsten1987
Karsten1987 reviewed Jun 20, 2018
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rmw_fastrtps_cpp/include/rmw_fastrtps_cpp/TypeSupport_impl.hpp
eprosima::fastcdr::Cdr::BIG_ENDIANNESS ? CDR_BE : CDR_LE;
memcpy(payload->data, ser->getBufferPointer(), ser->getSerializedDataLength());
return true;
auto ser_data = static_cast<SerializedData *>(data);
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The function could be strongly typed then, right? So this cast could go.

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Not possible, as it is the implementation of Fast-RTPS TopicDataType interface, declared in this line

rmw_fastrtps_cpp/include/rmw_fastrtps_cpp/TypeSupport_impl.hpp
memcpy(payload->data, ser->getBufferPointer(), ser->getSerializedDataLength());
return true;
auto ser_data = static_cast<SerializedData *>(data);
if (ser_data->is_cdr_buffer) {
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I am a little bit confused. Why would you call serialize on already binary data?

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@MiguelCompany MiguelCompany Jun 20, 2018 •
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This is the case when the call comes from rmw_publish_serialized_message. The serialize method is called internally by code inside Fast-RTPS publisher.

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@Karsten1987 Karsten1987 Jun 20, 2018 •
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so right now, there is no call to serialize. The raw data will simply be wrapped in Cdr and directly send.
I feel like, this decision of whether it's actually necessary to serialize or not should be taken outside of the serialize function.
https://github.com/ros2/rmw_fastrtps/blob/master/rmw_fastrtps_cpp/src/rmw_publish.cpp#L86-L89

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When you say 'right now', do you mean on the code currently on master, or on this PR.

Whenever data is sent, the serialize function of TypeSupport class is called. In the code currently on master it just copies an externally serialized buffer into the SerializedPayload (that points) to the internal history record buffer.

The code on this PR does that on some cases (namely rmw_publish_serialized) and performs serialization directly on others (rmw_publish). On the latter case we save the allocation of a temporary buffer.

rmw_fastrtps_cpp/include/rmw_fastrtps_cpp/TypeSupport_impl.hpp
auto buffer = static_cast<eprosima::fastcdr::FastBuffer *>(data);
if (!buffer->reserve(payload->length)) {
return false;
auto ser_data = static_cast<SerializedData *>(data);
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i think this function also could be strongly typed.

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Not possible, as it is the implementation of Fast-RTPS TopicDataType interface, declared in this line

rmw_fastrtps_cpp/src/rmw_publish.cpp
rmw_fastrtps_cpp::SerializedData data;
data.is_cdr_buffer = false;
data.data = const_cast<void *>(ros_message);
if (!info->publisher_->write(&data)) {
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shouldn't this be data.data ?

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As stated in this comment, it is not. The write method is provided with a pointer to a SerializedData struct, that will in turn be passed on to the serialize method on TypeSupport_impl.

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Looking at the first commit this doesn't seem to only be an improvement but it seems to also fix something. Can you please clarify what the problem without that fix is with the current code.

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dirk-thomas commented Jun 20, 2018 •
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@MiguelCompany since I noticed you commenting on other questions in this ticket can you please respond to the question in this comment asap?

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Can you please clarify what the problem without that fix is with the current code.

There are some edge cases where the estimated size will be short by up to 4 bytes. That would provoke a reallocation of the internal buffer when serializing the last field on some messages.

@dirk-thomas dirk-thomas merged commit 1d599f2 into ros2:master Jun 21, 2018
@dirk-thomas dirk-thomas removed the in review Waiting for review (Kanban column) label Jun 21, 2018
@MiguelCompany MiguelCompany deleted the avoid_allocations branch April 6, 2021 07:54
timonegk pushed a commit to timonegk/ros-rolling-rmw-fastrtps-cpp-release that referenced this pull request May 21, 2022
@hidmic @timonegk
Import Debian changes 6.2.1-1jammy
3504c03 
ros-rolling-rmw-fastrtps-cpp (6.2.1-1jammy) jammy; urgency=high
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  * Add pub/sub init, publish and take instrumentation using tracetools (#591 <ros2/rmw_fastrtps#591>)
  * Add content filter topic feature (#513 <ros2/rmw_fastrtps#513>)
  * Add sequence numbers to message info structure (#587 <ros2/rmw_fastrtps#587>)
  * Removed some heap interactions in rmw_serialize.cpp (#590 <ros2/rmw_fastrtps#590>)
  * Contributors: Chen Lihui, Christophe Bedard, Ivan Santiago Paunovic, WideAwakeTN
.
ros-rolling-rmw-fastrtps-cpp (6.2.0-1jammy) jammy; urgency=high
.
  * Add EventsExecutor (#468 <ros2/rmw_fastrtps#468>)
  * Install headers to include/${PROJECT_NAME} (#578 <ros2/rmw_fastrtps#578>)
  * Contributors: Shane Loretz, iRobot ROS
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ros-rolling-rmw-fastrtps-cpp (6.1.2-1jammy) jammy; urgency=high
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ros-rolling-rmw-fastrtps-cpp (6.1.1-1jammy) jammy; urgency=high
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ros-rolling-rmw-fastrtps-cpp (6.1.0-1jammy) jammy; urgency=high
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  * Add client/service QoS getters. (#560 <ros2/rmw_fastrtps#560>)
  * Contributors: mauropasse
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ros-rolling-rmw-fastrtps-cpp (6.0.0-1jammy) jammy; urgency=high
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ros-rolling-rmw-fastrtps-cpp (5.2.2-1jammy) jammy; urgency=high
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  * Correctly recalculate serialized size on bounded sequences. (#540 <ros2/rmw_fastrtps#540>)
  * Fix type size alignment. (#550 <ros2/rmw_fastrtps#550>)
  * Contributors: Miguel Company
.
ros-rolling-rmw-fastrtps-cpp (5.2.1-1jammy) jammy; urgency=high
.
  * Change links from index.ros.org -> docs.ros.org (#539 <ros2/rmw_fastrtps#539>)
  * Contributors: Chris Lalancette
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ros-rolling-rmw-fastrtps-cpp (5.2.0-1jammy) jammy; urgency=high
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  * Add rmw_publisher_wait_for_all_acked support. (#519 <ros2/rmw_fastrtps#519>)
  * Contributors: Barry Xu
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ros-rolling-rmw-fastrtps-cpp (5.1.0-1jammy) jammy; urgency=high
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  * Loan messages implementation (#523 <ros2/rmw_fastrtps#523>)
    * Added is_plain_ attribute to base TypeSupport.
    * Added new methods to base TypeSupport.
    * Implementation of rmw_borrow_loaned_message.
    * Implementation of rmw_return_loaned_message_from_publisher.
    * Enable loan messages on publishers of plain types.
    * Implementation for taking loaned messages.
    * Enable loan messages on subscriptions of plain types.
  * Contributors: Miguel Company
.
ros-rolling-rmw-fastrtps-cpp (5.0.0-1jammy) jammy; urgency=high
.
  * Refactor to use DDS standard API (#518 <ros2/rmw_fastrtps#518>)
  * Unique network flows (#502 <ros2/rmw_fastrtps#502>)
  * updating quality declaration links (re: ros2/docs.ros2.org#52 <ros2/docs.ros2.org#52>) (#520 <ros2/rmw_fastrtps#520>)
  * Contributors: Miguel Company, shonigmann
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ros-rolling-rmw-fastrtps-cpp (4.5.0-1jammy) jammy; urgency=high
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ros-rolling-rmw-fastrtps-cpp (4.4.0-1jammy) jammy; urgency=high
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  * Add RMW function to check QoS compatibility (#511 <ros2/rmw_fastrtps#511>)
  * Capture cdr exceptions (#505 <ros2/rmw_fastrtps#505>)
  * Contributors: Jacob Perron, Miguel Company
.
ros-rolling-rmw-fastrtps-cpp (4.3.0-1jammy) jammy; urgency=high
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  * Load profiles based on topic names (#335 <ros2/rmw_fastrtps#335>)
  * Set rmw_dds_common::GraphCache callback after init succeeds. (#496 <ros2/rmw_fastrtps#496>)
  * Handle typesupport errors on fetch. (#495 <ros2/rmw_fastrtps#495>)
  * Contributors: Eduardo Ponz Segrelles, Michel Hidalgo
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ros-rolling-rmw-fastrtps-cpp (4.2.0-1jammy) jammy; urgency=high
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ros-rolling-rmw-fastrtps-cpp (4.1.0-1jammy) jammy; urgency=high
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  * Check for correct context shutdown (#486 <ros2/rmw_fastrtps#486>)
  * New environment variable to change easily the publication mode (#470 <ros2/rmw_fastrtps#470>)
  * Contributors: Ignacio Montesino Valle, José Luis Bueno López
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ros-rolling-rmw-fastrtps-cpp (4.0.0-1jammy) jammy; urgency=high
.
  * Discriminate when the Client has gone from when the Client has not completely matched (#467 <ros2/rmw_fastrtps#467>)
    * Workaround when the client is gone before server sends response
    * Change add to the map to listener callback
  * Update the package.xml files with the latest Open Robotics maintainers (#459 <ros2/rmw_fastrtps#459>)
  * Update Quality Declarations and READMEs (#455 <ros2/rmw_fastrtps#455>)
    * Add QD links for dependencies to rmw_fastrtps_cpp QD
    * Provide external dependencies QD links
    * Update rmw_fastrtps README to use Fast DDS
    * Update rmw_fastrtps_cpp QD: Fast DDS & unit test
    * Update README rmw_fastrtps_cpp to QL2
  * Contributors: JLBuenoLopez-eProsima, Jaime Martin Losa, José Luis Bueno López, Michael Jeronimo
.
ros-rolling-rmw-fastrtps-cpp (3.1.4-1jammy) jammy; urgency=high
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  * Perform fault injection in all creation/destruction APIs. (#453 <ros2/rmw_fastrtps#453>)
  * Ensure rmw_destroy_node() completes despite run-time errors. (#458 <ros2/rmw_fastrtps#458>)
  * Update rmw_fastrtps_cpp and rmw_fastrtps_shared_cpp QDs to QL2. (#456 <ros2/rmw_fastrtps#456>)
  * Contributors: Michel Hidalgo
.
ros-rolling-rmw-fastrtps-cpp (3.1.3-1jammy) jammy; urgency=high
.
  * Return RMW_RET_UNSUPPORTED in rmw_get_serialized_message_size (#452 <ros2/rmw_fastrtps#452>)
  * Contributors: Alejandro Hernández Cordero
.
ros-rolling-rmw-fastrtps-cpp (3.1.2-1jammy) jammy; urgency=high
.
  * Updated publisher/subscription allocation and wait set API return codes (#443 <ros2/rmw_fastrtps#443>)
  * Added rmw_logging tests (#442 <ros2/rmw_fastrtps#442>)
  * Contributors: Alejandro Hernández Cordero
.
ros-rolling-rmw-fastrtps-cpp (3.1.1-1jammy) jammy; urgency=high
.
  * Make service/client construction/destruction implementation compliant (#445 <ros2/rmw_fastrtps#445>)
  * Make sure type can be unregistered successfully (#437 <ros2/rmw_fastrtps#437>)
  * Contributors: Barry Xu, Michel Hidalgo
.
ros-rolling-rmw-fastrtps-cpp (3.1.0-1jammy) jammy; urgency=high
.
  * Add tests for native entity getters. (#439 <ros2/rmw_fastrtps#439>)
  * Avoid deadlock if graph update fails. (#438 <ros2/rmw_fastrtps#438>)
  * Contributors: Michel Hidalgo
.
ros-rolling-rmw-fastrtps-cpp (3.0.0-1jammy) jammy; urgency=high
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  * Call Domain::removePublisher while failure occurs in create_publisher (#434 <ros2/rmw_fastrtps#434>)
  * Contributors: Barry Xu
.
ros-rolling-rmw-fastrtps-cpp (2.6.0-1jammy) jammy; urgency=high
.
  * Ensure compliant matched pub/sub count API. (#424 <ros2/rmw_fastrtps#424>)
  * Ensure compliant publisher QoS queries. (#425 <ros2/rmw_fastrtps#425>)
  * Contributors: Michel Hidalgo
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ros-rolling-rmw-fastrtps-cpp (2.5.0-1jammy) jammy; urgency=high
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ros-rolling-rmw-fastrtps-cpp (2.4.0-1jammy) jammy; urgency=high
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  * Ensure compliant subscription API. (#419 <ros2/rmw_fastrtps#419>)
  * Contributors: Michel Hidalgo
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ros-rolling-rmw-fastrtps-cpp (2.3.0-1jammy) jammy; urgency=high
.
  * Ensure compliant publisher API. (#414 <ros2/rmw_fastrtps#414>)
  * Contributors: Michel Hidalgo
.
ros-rolling-rmw-fastrtps-cpp (2.2.0-1jammy) jammy; urgency=high
.
  * Set context actual domain id (#410 <ros2/rmw_fastrtps#410>)
  * Contributors: Ivan Santiago Paunovic
.
ros-rolling-rmw-fastrtps-cpp (2.1.0-1jammy) jammy; urgency=high
.
  * Ensure compliant node construction/destruction API. (#408 <ros2/rmw_fastrtps#408>)
  * Contributors: Michel Hidalgo
.
ros-rolling-rmw-fastrtps-cpp (2.0.0-1jammy) jammy; urgency=high
.
  * Remove domain_id and localhost_only from node API (#407 <ros2/rmw_fastrtps#407>)
  * Amend rmw_init() implementation: require enclave. (#406 <ros2/rmw_fastrtps#406>)
  * Update Quality Declarations to QL3. (#404 <ros2/rmw_fastrtps#404>)
  * Contributors: Ivan Santiago Paunovic, Michel Hidalgo
.
ros-rolling-rmw-fastrtps-cpp (1.1.0-1jammy) jammy; urgency=high
.
  * Ensure compliant init/shutdown API implementation. (#401 <ros2/rmw_fastrtps#401>)
  * Update Quality Declaration to QL3. (#403 <ros2/rmw_fastrtps#403>)
  * Finalize context iff shutdown. (#396 <ros2/rmw_fastrtps#396>)
  * Make service wait for response reader (#390 <ros2/rmw_fastrtps#390>)
  * Contributors: Michel Hidalgo, Miguel Company
.
ros-rolling-rmw-fastrtps-cpp (1.0.1-1jammy) jammy; urgency=high
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  * Add Security Vulnerability Policy pointing to REP-2006 (#389 <ros2/rmw_fastrtps#389>)
  * Update QDs for 1.0 (#383 <ros2/rmw_fastrtps#383>)
  * Contributors: Chris Lalancette, Stephen Brawner
.
ros-rolling-rmw-fastrtps-cpp (1.0.0-1jammy) jammy; urgency=high
.
  * Remove API related to manual by node liveliness.  (#379 <ros2/rmw_fastrtps#379>)
  * Update quality declarations on feature testing. (#380 <ros2/rmw_fastrtps#380>)
  * Contributors: Ivan Santiago Paunovic, Michel Hidalgo
.
ros-rolling-rmw-fastrtps-cpp (0.9.1-1jammy) jammy; urgency=high
.
  * Add package READMEs and QUALITY_DECLARATION files (#375 <ros2/rmw_fastrtps#375>)
  * Added doxyfiles (#372 <ros2/rmw_fastrtps#372>)
  * Contributors: Alejandro Hernández Cordero, brawner
.
ros-rolling-rmw-fastrtps-cpp (0.9.0-1jammy) jammy; urgency=high
.
  * Add missing export of rmw_dds_common. (#374 <ros2/rmw_fastrtps#374>)
  * Rename rosidl_message_bounds_t. (#373 <ros2/rmw_fastrtps#373>)
  * Feature/services timestamps. (#369 <ros2/rmw_fastrtps#369>)
  * Add support for taking a sequence of messages. (#366 <ros2/rmw_fastrtps#366>)
  * security-context -> enclave. (#365 <ros2/rmw_fastrtps#365>)
  * Rename rosidl_generator_c namespace to rosidl_runtime_c. (#367 <ros2/rmw_fastrtps#367>)
  * Remove custom typesupport for rmw_dds_common interfaces. (#364 <ros2/rmw_fastrtps#364>)
  * Added rosidl_runtime c and cpp depencencies. (#351 <ros2/rmw_fastrtps#351>)
  * Switch to one Participant per Context. (#312 <ros2/rmw_fastrtps#312>)
  * Add rmw_*_event_init() functions. (#354 <ros2/rmw_fastrtps#354>)
  * Fixing type support C/CPP mix on rmw_fastrtps_dynamic_cpp. (#350 <ros2/rmw_fastrtps#350>)
  * Fix build warning in Ubuntu Focal. (#346 <ros2/rmw_fastrtps#346>)
  * Code style only: wrap after open parenthesis if not in one line. (#347 <ros2/rmw_fastrtps#347>)
  * Passing down type support information (#342 <ros2/rmw_fastrtps#342>)
  * Implement functions to get publisher and subcription informations like QoS policies from topic name. (#336 <ros2/rmw_fastrtps#336>)
  * Contributors: Alejandro Hernández Cordero, Dirk Thomas, Ingo Lütkebohle, Ivan Santiago Paunovic, Jaison Titus, Miaofei Mei, Michael Carroll, Miguel Company, Mikael Arguedas
.
ros-rolling-rmw-fastrtps-cpp (0.8.1-1jammy) jammy; urgency=high
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  * use return_loaned_message_from (#334 <ros2/rmw_fastrtps#334>)
  * Restrict traffic to localhost only if env var is provided (#331 <ros2/rmw_fastrtps#331>)
  * Zero copy api (#322 <ros2/rmw_fastrtps#322>)
  * update signature for added pub/sub options (#329 <ros2/rmw_fastrtps#329>)
  * Contributors: Brian Marchi, Karsten Knese, William Woodall
.
ros-rolling-rmw-fastrtps-cpp (0.8.0-1jammy) jammy; urgency=high
.
  * Add function for getting clients by node (#293 <ros2/rmw_fastrtps#293>)
  * Implement get_actual_qos() for subscriptions (#287 <ros2/rmw_fastrtps#287>)
  * Fix error message (#290 <ros2/rmw_fastrtps#290>)
  * Contributors: Jacob Perron, M. M
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ros-rolling-rmw-fastrtps-cpp (0.7.3-1jammy) jammy; urgency=high
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ros-rolling-rmw-fastrtps-cpp (0.7.2-1jammy) jammy; urgency=high
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  * Centralize topic name creation logic and update to match FastRTPS 1.8 API (#272 <ros2/rmw_fastrtps#272>)
  * Contributors: Nick Burek
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ros-rolling-rmw-fastrtps-cpp (0.7.1-1jammy) jammy; urgency=high
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  * Support arbitrary message namespaces  (#266 <ros2/rmw_fastrtps#266>)
  * Add qos interfaces with no-op (#271 <ros2/rmw_fastrtps#271>)
  * Updates for preallocation API. (#274 <ros2/rmw_fastrtps#274>)
  * Contributors: Jacob Perron, Michael Carroll, Ross Desmond
.
ros-rolling-rmw-fastrtps-cpp (0.7.0-1jammy) jammy; urgency=high
.
  * Add function to get publisher actual qos settings (#267 <ros2/rmw_fastrtps#267>)
  * pass context to wait set and fini context (#252 <ros2/rmw_fastrtps#252>)
  * Improve service_is_available logic to protect that client is waiting forever (#238 <ros2/rmw_fastrtps#238>)
  * Merge pull request #250 <ros2/rmw_fastrtps#250> from ros2/support_static_lib
  * use namespace_prefix from shared package
  * Contributors: Dirk Thomas, DongheeYe, William Woodall, ivanpauno
.
ros-rolling-rmw-fastrtps-cpp (0.6.1-1jammy) jammy; urgency=high
.
  * Add topic cache object for managing topic relations (#236 <ros2/rmw_fastrtps#236>)
  * Fastrtps 1.7.0 (#233 <ros2/rmw_fastrtps#233>)
  * RMW_FastRTPS configuration from XML only (#243 <ros2/rmw_fastrtps#243>)
  * refactor to support init options and context (#237 <ros2/rmw_fastrtps#237>)
  * Methods to retrieve matched counts on pub/sub (#234 <ros2/rmw_fastrtps#234>)
  * use uint8_array (#240 <ros2/rmw_fastrtps#240>)
  * Contributors: Juan Carlos, Karsten Knese, Michael Carroll, MiguelCompany, Ross Desmond, William Woodall
.
ros-rolling-rmw-fastrtps-cpp (0.6.0-1jammy) jammy; urgency=high
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  * Add semicolons to all RCLCPP and RCUTILS macros. (#229 <ros2/rmw_fastrtps#229>)
  * Include node namespaces in get_node_names (#224 <ros2/rmw_fastrtps#224>)
  * add rmw_get_serialization_format (#215 <ros2/rmw_fastrtps#215>)
  * Merge pull request #218 <ros2/rmw_fastrtps#218> from ros2/pr203
  * Revert "fix template closing indentation (#214 <ros2/rmw_fastrtps#214>)"
  * fix template closing indentation (#214 <ros2/rmw_fastrtps#214>)
  * Contributors: Chris Lalancette, Dirk Thomas, Karsten Knese, Michael Carroll, Miguel Company, Mikael Arguedas
.
ros-rolling-rmw-fastrtps-cpp (0.5.1-1jammy) jammy; urgency=high
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  * update maintainer
  * Contributors: Dirk Thomas
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ros-rolling-rmw-fastrtps-cpp (0.5.0-1jammy) jammy; urgency=high
.
  * Avoid allocations (#211 <ros2/rmw_fastrtps#211>)
  * Temporary buffer remove (#207 <ros2/rmw_fastrtps#207>)
  * Validate the buffer_ of CustomServiceRequest object before using it to (#210 <ros2/rmw_fastrtps#210>)
  * update usage of rcutils_join_path() (#208 <ros2/rmw_fastrtps#208>)
  * Expose raw CDR stream for publish and subscribe (#186 <ros2/rmw_fastrtps#186>)
  * Remove topic partitions (#192 <ros2/rmw_fastrtps#192>)
  * Fix leak if client reponse is never taken (#201 <ros2/rmw_fastrtps#201>)
  * Revert "Export rmw_fastrtps_cpp target" (#200 <ros2/rmw_fastrtps#200>)
  * Support access control  (#197 <ros2/rmw_fastrtps#197>)
  * Export rmw_fastrtps_cpp target (#198 <ros2/rmw_fastrtps#198>)
  * Fix deserialization segfault in bionic. (#199 <ros2/rmw_fastrtps#199>)
  * Fix namespaces (#196 <ros2/rmw_fastrtps#196>)
  * Merge pull request #182 <ros2/rmw_fastrtps#182> from ros2/node_name_in_user_data
  * add participant listener
  * add node name to user data
  * change export order for static linking (#190 <ros2/rmw_fastrtps#190>)
  * update style (#189 <ros2/rmw_fastrtps#189>)
  * optimize timeout judgement according to different condition (#187 <ros2/rmw_fastrtps#187>)
  * use existing check_wait_set_for_data to avoid duplicated code (#185 <ros2/rmw_fastrtps#185>)
  * Enable logging level manipulation from rmw_fastrtps (#156 <ros2/rmw_fastrtps#156>)
  * Small performance improvements (#183 <ros2/rmw_fastrtps#183>)
  * Segmentation error to dereference nullptr (#180 <ros2/rmw_fastrtps#180>)
  * Contributors: Dirk Thomas, Ethan Gao, Guillaume Autran, Karsten Knese, Michael Carroll, MiguelCompany, Mikael Arguedas, Minggang Wang, Rohit Salem, Shane Loretz, Sriram Raghunathan, William Woodall, jwang11
.
ros-rolling-rmw-fastrtps-cpp (0.4.0-1jammy) jammy; urgency=high
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  * Merge pull request #178 <ros2/rmw_fastrtps#178> from ros2/fix_wrong_count
  * Merge pull request #177 <ros2/rmw_fastrtps#177> from ros2/rename_group
  * Wait set two words (#175 <ros2/rmw_fastrtps#175>)
  * not exporting pthread manually (#174 <ros2/rmw_fastrtps#174>)
  * Merge pull request #169 <ros2/rmw_fastrtps#169> from ros2/rep149
  * Merge pull request #171 <ros2/rmw_fastrtps#171> from jwang11/master
  * rcutils_join_path returns a char * now. (#173 <ros2/rmw_fastrtps#173>)
  * memory leak issue (#172 <ros2/rmw_fastrtps#172>)
  * Unify and simplify de/serializeROSmessage processing
  * Avoid duplicated code in calculateMaxSerializedSize for array and normal member (#168 <ros2/rmw_fastrtps#168>)
  * Fix the issues to dereference to nullptr (#165 <ros2/rmw_fastrtps#165>)
  * Fix rmw_fastrtps dead code (#163 <ros2/rmw_fastrtps#163>)
  * Merge pull request #167 <ros2/rmw_fastrtps#167> from deng02/tune-count-pub-sub
  * Remove string allocation in the count of subscribers and publishers
  * use auto deduction and nullptr to keep coding style consistent (#162 <ros2/rmw_fastrtps#162>)
  * Merge pull request #164 <ros2/rmw_fastrtps#164> from dejanpan/master
  * Fix several parameter check issues in rmw_fastrtps_cpp apis
  * Remove unnecessary dependency on rosidl_generator_cpp (#161 <ros2/rmw_fastrtps#161>)
  * Move the hasData checks for non-blocking wait 'timeout' higher (#158 <ros2/rmw_fastrtps#158>)
  * Support loading default XML profile file (#153 <ros2/rmw_fastrtps#153>)
  * Drop duplicated rmw_init.cpp in rmw_fastrtps_cpp/CMakeLists.txt (#155 <ros2/rmw_fastrtps#155>)
  * Merge pull request #154 <ros2/rmw_fastrtps#154> from ros2/uncrustify_master
  * Removing magic numbers: old maximun lengths (#152 <ros2/rmw_fastrtps#152>)
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@Karsten1987 Karsten1987 Karsten1987 left review comments

@dirk-thomas dirk-thomas dirk-thomas approved these changes

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@MiguelCompany @dirk-thomas @Karsten1987