tf::ChromeObserver tf::ObserverInterface taskflow/core/observer.hpp tf::ChromeObserver::Segment tf::ChromeObserver::Timeline class friend class Executor Executor Executor Timeline Timeline tf::ChromeObserver::_timeline _timeline void void tf::ChromeObserver::dump (std::ostream &ostream) const dump std::ostream & ostream dumps the timelines into a Chrome Tracing format through an output stream std::string std::string tf::ChromeObserver::dump () const dump dumps the timelines into a Chrome Tracing format void void tf::ChromeObserver::clear () clear clears the timeline data size_t size_t tf::ChromeObserver::num_tasks () const num_tasks queries the number of tasks observed void void tf::ChromeObserver::set_up (size_t num_workers) override final set_up set_up size_t num_workers constructor-like method to call when the executor observer is fully created num_workers the number of the worker threads in the executor void void tf::ChromeObserver::on_entry (WorkerView w, TaskView task_view) override final on_entry on_entry WorkerView wv TaskView task_view method to call before a worker thread executes a closure wv an immutable view of this worker thread task_view a constant wrapper object to the task void void tf::ChromeObserver::on_exit (WorkerView w, TaskView task_view) override final on_exit on_exit WorkerView wv TaskView task_view method to call after a worker thread executed a closure wv an immutable view of this worker thread task_view a constant wrapper object to the task class to create an observer based on Chrome tracing format A tf::ChromeObserver inherits tf::ObserverInterface and defines methods to dump the observed thread activities into a format that can be visualized through Chrome Tracing. tf::Taskflowtaskflow; tf::Executorexecutor; //inserttasksintotaskflow //... //createacustomobserver std::shared_ptr<tf::ChromeObserver>observer=executor.make_observer<tf::ChromeObserver>(); //runthetaskflow executor.run(taskflow).wait(); //dumpthethreadactivitiestoachrome-tracingformat. observer->dump(std::cout); tf::ObserverInterface tf::ChromeObserver tf::ObserverInterface tf::ChromeObserver tf::ChromeObserver_timeline tf::ChromeObserverclear tf::ChromeObserverdump tf::ChromeObserverdump tf::ChromeObserverExecutor tf::ChromeObservernum_tasks tf::ChromeObserveron_entry tf::ChromeObserveron_exit tf::ChromeObserverset_up tf::ChromeObserver~ObserverInterface