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rclcpp::executors::MultiThreadedExecutor Class Reference
Inheritance diagram for rclcpp::executors::MultiThreadedExecutor:
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Collaboration diagram for rclcpp::executors::MultiThreadedExecutor:
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Public Member Functions

RCLCPP_PUBLIC MultiThreadedExecutor (const rclcpp::ExecutorOptions &options=rclcpp::ExecutorOptions(), size_t number_of_threads=0, bool yield_before_execute=false, std::chrono::nanoseconds timeout=std::chrono::nanoseconds(-1))
 Constructor for MultiThreadedExecutor. More...
 
RCLCPP_PUBLIC void spin () override
 
RCLCPP_PUBLIC size_t get_number_of_threads ()
 
- Public Member Functions inherited from rclcpp::Executor
RCLCPP_PUBLIC Executor (const rclcpp::ExecutorOptions &options=rclcpp::ExecutorOptions())
 Default constructor. More...
 
virtual RCLCPP_PUBLIC ~Executor ()
 Default destructor.
 
virtual RCLCPP_PUBLIC void add_callback_group (rclcpp::CallbackGroup::SharedPtr group_ptr, rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node_ptr, bool notify=true)
 Add a callback group to an executor. More...
 
virtual RCLCPP_PUBLIC std::vector< rclcpp::CallbackGroup::WeakPtr > get_all_callback_groups ()
 Get callback groups that belong to executor. More...
 
virtual RCLCPP_PUBLIC std::vector< rclcpp::CallbackGroup::WeakPtr > get_manually_added_callback_groups ()
 Get callback groups that belong to executor. More...
 
virtual RCLCPP_PUBLIC std::vector< rclcpp::CallbackGroup::WeakPtr > get_automatically_added_callback_groups_from_nodes ()
 Get callback groups that belong to executor. More...
 
virtual RCLCPP_PUBLIC void remove_callback_group (rclcpp::CallbackGroup::SharedPtr group_ptr, bool notify=true)
 Remove a callback group from the executor. More...
 
virtual RCLCPP_PUBLIC void add_node (rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node_ptr, bool notify=true)
 Add a node to the executor. More...
 
virtual RCLCPP_PUBLIC void add_node (std::shared_ptr< rclcpp::Node > node_ptr, bool notify=true)
 Convenience function which takes Node and forwards NodeBaseInterface. More...
 
virtual RCLCPP_PUBLIC void remove_node (rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node_ptr, bool notify=true)
 Remove a node from the executor. More...
 
virtual RCLCPP_PUBLIC void remove_node (std::shared_ptr< rclcpp::Node > node_ptr, bool notify=true)
 Convenience function which takes Node and forwards NodeBaseInterface. More...
 
template<typename RepT = int64_t, typename T = std::milli>
void spin_node_once (rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node, std::chrono::duration< RepT, T > timeout=std::chrono::duration< RepT, T >(-1))
 Add a node to executor, execute the next available unit of work, and remove the node. More...
 
template<typename NodeT = rclcpp::Node, typename RepT = int64_t, typename T = std::milli>
void spin_node_once (std::shared_ptr< NodeT > node, std::chrono::duration< RepT, T > timeout=std::chrono::duration< RepT, T >(-1))
 Convenience function which takes Node and forwards NodeBaseInterface.
 
RCLCPP_PUBLIC void spin_node_some (rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node)
 Add a node, complete all immediately available work, and remove the node. More...
 
RCLCPP_PUBLIC void spin_node_some (std::shared_ptr< rclcpp::Node > node)
 Convenience function which takes Node and forwards NodeBaseInterface.
 
virtual RCLCPP_PUBLIC void spin_some (std::chrono::nanoseconds max_duration=std::chrono::nanoseconds(0))
 Collect work once and execute all available work, optionally within a duration. More...
 
virtual RCLCPP_PUBLIC void spin_all (std::chrono::nanoseconds max_duration)
 Collect and execute work repeatedly within a duration or until no more work is available. More...
 
virtual RCLCPP_PUBLIC void spin_once (std::chrono::nanoseconds timeout=std::chrono::nanoseconds(-1))
 
template<typename FutureT , typename TimeRepT = int64_t, typename TimeT = std::milli>
FutureReturnCode spin_until_future_complete (const FutureT &future, std::chrono::duration< TimeRepT, TimeT > timeout=std::chrono::duration< TimeRepT, TimeT >(-1))
 Spin (blocking) until the future is complete, it times out waiting, or rclcpp is interrupted. More...
 
RCLCPP_PUBLIC void cancel ()
 Cancel any running spin* function, causing it to return. More...
 
RCLCPP_PUBLIC void set_memory_strategy (memory_strategy::MemoryStrategy::SharedPtr memory_strategy)
 Support dynamic switching of the memory strategy. More...
 
RCLCPP_PUBLIC bool is_spinning ()
 Returns true if the executor is currently spinning. More...
 

Protected Member Functions

RCLCPP_PUBLIC void run (size_t this_thread_number)
 
- Protected Member Functions inherited from rclcpp::Executor
RCLCPP_PUBLIC void spin_node_once_nanoseconds (rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node, std::chrono::nanoseconds timeout)
 
RCLCPP_PUBLIC void spin_some_impl (std::chrono::nanoseconds max_duration, bool exhaustive)
 
RCLCPP_PUBLIC void execute_any_executable (AnyExecutable &any_exec)
 Find the next available executable and do the work associated with it. More...
 
RCLCPP_PUBLIC void wait_for_work (std::chrono::nanoseconds timeout=std::chrono::nanoseconds(-1))
 
RCLCPP_PUBLIC rclcpp::node_interfaces::NodeBaseInterface::SharedPtr get_node_by_group (const WeakCallbackGroupsToNodesMap &weak_groups_to_nodes, rclcpp::CallbackGroup::SharedPtr group)
 
RCLCPP_PUBLIC bool has_node (const rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node_ptr, const WeakCallbackGroupsToNodesMap &weak_groups_to_nodes) const
 Return true if the node has been added to this executor. More...
 
RCLCPP_PUBLIC rclcpp::CallbackGroup::SharedPtr get_group_by_timer (rclcpp::TimerBase::SharedPtr timer)
 
virtual RCLCPP_PUBLIC void add_callback_group_to_map (rclcpp::CallbackGroup::SharedPtr group_ptr, rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node_ptr, WeakCallbackGroupsToNodesMap &weak_groups_to_nodes, bool notify=true) RCPPUTILS_TSA_REQUIRES(mutex_)
 Add a callback group to an executor. More...
 
virtual RCLCPP_PUBLIC void remove_callback_group_from_map (rclcpp::CallbackGroup::SharedPtr group_ptr, WeakCallbackGroupsToNodesMap &weak_groups_to_nodes, bool notify=true) RCPPUTILS_TSA_REQUIRES(mutex_)
 Remove a callback group from the executor. More...
 
RCLCPP_PUBLIC bool get_next_ready_executable (AnyExecutable &any_executable)
 
RCLCPP_PUBLIC bool get_next_ready_executable_from_map (AnyExecutable &any_executable, const WeakCallbackGroupsToNodesMap &weak_groups_to_nodes)
 
RCLCPP_PUBLIC bool get_next_executable (AnyExecutable &any_executable, std::chrono::nanoseconds timeout=std::chrono::nanoseconds(-1))
 
virtual RCLCPP_PUBLIC void add_callback_groups_from_nodes_associated_to_executor () RCPPUTILS_TSA_REQUIRES(mutex_)
 Add all callback groups that can be automatically added from associated nodes. More...
 
memory_strategy::MemoryStrategy::SharedPtr memory_strategy_ RCPPUTILS_TSA_PT_GUARDED_BY (mutex_)
 The memory strategy: an interface for handling user-defined memory allocation strategies.
 
virtual RCLCPP_PUBLIC void spin_once_impl (std::chrono::nanoseconds timeout)
 
WeakCallbackGroupsToGuardConditionsMap weak_groups_to_guard_conditions_ RCPPUTILS_TSA_GUARDED_BY (mutex_)
 maps callback groups to guard conditions
 
WeakCallbackGroupsToNodesMap weak_groups_associated_with_executor_to_nodes_ RCPPUTILS_TSA_GUARDED_BY (mutex_)
 maps callback groups associated to nodes
 
WeakCallbackGroupsToNodesMap weak_groups_to_nodes_associated_with_executor_ RCPPUTILS_TSA_GUARDED_BY (mutex_)
 maps callback groups to nodes associated with executor
 
WeakCallbackGroupsToNodesMap weak_groups_to_nodes_ RCPPUTILS_TSA_GUARDED_BY (mutex_)
 maps all callback groups to nodes
 
std::list< rclcpp::node_interfaces::NodeBaseInterface::WeakPtr > weak_nodes_ RCPPUTILS_TSA_GUARDED_BY (mutex_)
 nodes that are associated with the executor
 

Additional Inherited Members

- Protected Types inherited from rclcpp::Executor
typedef std::map< rclcpp::CallbackGroup::WeakPtr, const rclcpp::GuardCondition *, std::owner_less< rclcpp::CallbackGroup::WeakPtr > > WeakCallbackGroupsToGuardConditionsMap
 
- Static Protected Member Functions inherited from rclcpp::Executor
static RCLCPP_PUBLIC void execute_subscription (rclcpp::SubscriptionBase::SharedPtr subscription)
 
static RCLCPP_PUBLIC void execute_timer (rclcpp::TimerBase::SharedPtr timer)
 
static RCLCPP_PUBLIC void execute_service (rclcpp::ServiceBase::SharedPtr service)
 
static RCLCPP_PUBLIC void execute_client (rclcpp::ClientBase::SharedPtr client)
 
- Protected Attributes inherited from rclcpp::Executor
std::atomic_bool spinning
 Spinning state, used to prevent multi threaded calls to spin and to cancel blocking spins.
 
rclcpp::GuardCondition interrupt_guard_condition_
 Guard condition for signaling the rmw layer to wake up for special events.
 
std::shared_ptr< rclcpp::GuardConditionshutdown_guard_condition_
 
rcl_wait_set_t wait_set_ = rcl_get_zero_initialized_wait_set()
 Wait set for managing entities that the rmw layer waits on.
 
std::mutex mutex_
 
std::shared_ptr< rclcpp::Contextcontext_
 The context associated with this executor.
 
rclcpp::OnShutdownCallbackHandle shutdown_callback_handle_
 shutdown callback handle registered to Context
 

Detailed Description

Definition at line 35 of file multi_threaded_executor.hpp.

Constructor & Destructor Documentation

◆ MultiThreadedExecutor()

MultiThreadedExecutor::MultiThreadedExecutor ( const rclcpp::ExecutorOptions options = rclcpp::ExecutorOptions(),
size_t  number_of_threads = 0,
bool  yield_before_execute = false,
std::chrono::nanoseconds  timeout = std::chrono::nanoseconds(-1) 
)
explicit

Constructor for MultiThreadedExecutor.

For the yield_before_execute option, when true std::this_thread::yield() will be called after acquiring work (as an AnyExecutable) and releasing the spinning lock, but before executing the work. This is useful for reproducing some bugs related to taking work more than once.

Parameters
optionscommon options for all executors
number_of_threadsnumber of threads to have in the thread pool, the default 0 will use the number of cpu cores found instead
yield_before_executeif true std::this_thread::yield() is called
timeoutmaximum time to wait

Definition at line 28 of file multi_threaded_executor.cpp.

Member Function Documentation

◆ spin()

void MultiThreadedExecutor::spin ( )
overridevirtual
See also
rclcpp::Executor:spin() for more details
Exceptions
std::runtime_errorwhen spin() called while already spinning

Implements rclcpp::Executor.

Definition at line 46 of file multi_threaded_executor.cpp.

References rclcpp::Executor::spinning.


The documentation for this class was generated from the following files: