c++ - TBB 我必须破坏 child 的任务还是 parent 照顾？

Question

当父级被销毁时，子级是否也会自动销毁，还是我必须明确地销毁它们？

tbb::task *parent = new(tbb::task::allocate_root()) tbb::empty_task;
parent->increment_ref_count();

for (...){
    new(parent->allocate_child()) aSampleTask(this);
    parent->increment_ref_count();
    parent->spawn(*save);
}
parent->wait_for_all();
tbb::task::destroy(*parent);

Answer 1

Usually, a task is automatically destroyed by the scheduler after its method execute returns. But sometimes task objects are used idiomatically (such as for reference counting) without ever running execute. Such tasks should be disposed with method destroy. Explicit task Destruction

您还应该使用static void spawn( task& t ) task Class (见注释)

顺便说一句，你真的需要使用任务吗？ TBB提供各种并行algorithms