Add a variable to control the tasks size

[MatthewButterfly]

A program may accepts many tasks at the same time, it will grow the memory to use. If the memory is taken a lot by the program, the system will kill the program. May the library add a variable to control the max tasks can be added to the std::queue? Thanks.

1. // the task queue
   

2. std::queue< std::function<void()> > tasks;
   

[jhasse]

What should happen when the maximum is reached? Throw an exception or block until a task has finished?