rclcpp::ClockWaiter Class Reference

#include <rclcpp/clock.hpp>

Classes
class	ClockWaiterImpl

Public Member Functions
RCLCPP_PUBLIC	ClockWaiter (const rclcpp::Clock::SharedPtr &clock)
RCLCPP_PUBLIC bool	wait_until (std::unique_lock< std::mutex > &lock, const rclcpp::Time &abs_time, const std::function< bool()> &pred)
RCLCPP_PUBLIC void	notify_one ()

Detailed Description

A synchronization primitive, equal to std::conditional_variable, that works with the rclcpp::Clock.

For more information on the API see https://en.cppreference.com/w/cpp/thread/condition_variable.

Note, this class does not handle shutdowns, if you want to haven them handles as well, use ClockConditionalVariable.

Definition at line 284 of file clock.hpp.

Member Function Documentation

notify_one()

void rclcpp::ClockWaiter::notify_one

(

)

Notify the blocked thread, that it should reevaluate the wakeup condition. The given pred function in wait_until will be reevaluated and wait_until will return if it evaluates to true.

Definition at line 515 of file clock.cpp.

wait_until()

bool rclcpp::ClockWaiter::wait_until	(	std::unique_lock< std::mutex > &	lock,
		const rclcpp::Time &	abs_time,
		const std::function< bool()> &	pred
	)

Calling this function will block the current thread, until abs_time is reached, or pred returns true.

Parameters

lock	A locked lock. The lock must be locked at call time, or this method will throw. The lock will be atomically released and this thread will blocked.
abs_time	The time until which this thread shall be blocked.
pred	may be called in cased of spurious wakeups, but must be called every time notify_one() was called. During the call to pred, the given lock will be locked. This method will return, if pred returns true.

Definition at line 507 of file clock.cpp.

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

• rclcpp/include/rclcpp/clock.hpp
• rclcpp/src/rclcpp/clock.cpp