How to use TBB to run a function in a single thread

Question

I'm trying to use TBB to use just one thread to run this piece of code but I do not know how to proceed.

I have read that I should use tbb::task_group but I do not know how to use it.

void CScene::load(const std::string &_name) { if (!references++) { setName(_name); Resources.setCurrentScene(my_name); TEntityParseContext ctx; ctx.name = my_name; parseScene("data/scenes/" + my_name + ".scene", ctx); dynamic = ctx.dynamic_scene; for (CHandle e : ctx.entities_loaded) { entities.push_back(e); } Engine.getScriptingModule().raiseEvent(CModuleScripting::SCENE_LOADED, my_name); Resources.setCurrentScene("system"); } }

By the way, entities is a std::vector<CHandle> which is a private variable of the class

I have no idea what this code actually does (because all the relevant contextual information is missing), but is there a reason not to use std::thread? — catnip
– catnip, Commented Jul 5, 2018 at 7:13

Mike van Dyke · Accepted Answer · 2018-07-05 08:51:34Z

You just have to pass a lambda to the task_group::run function:

CScene cs; tbb::task_group g; g.run([&cs]{cs.load("Name");}); // maybe do some other work here // This function either waits or executes the lambda // if no other thread is executing it g.wait();

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