las3_pub / predictable_parallel_patterns

Merge: TBB like task stealing

See merge request !3

This implementation allows one to add the deque_item property to any class and then manage pointers to these items in a deque. We currently use a spinlock for concurrent access.

The lock was not released when an split_task was executed. We did a dirty fix by allowing the method to unlock the lock itself, but this has to be done cleaner in the future.

Merge first example of a Basic Task Model

See merge request !2

This means that high level tasks can be stolen and lays the groundwork for implementing different tasks like classic work stealing.

This will be used for storing thread tasks aligned in continous memory, allowing different theads to work on the data without interfearing.

Right now no work can be spawned, we simply have a proove of concept that we start up each thread, work for the master to finish and then synchronize back to the main thread.

This requires the user to explicitly manage the storage duration/place of the thread local state, making a fine grained memory allocation simpler.

See NOTES.md for details, basically std::thread can use dynamic memory allocation internaly and we want to prevent that.

We force linker errors if the new operator is used somewhere. See NOTES.md for details.

Fix CI Setup

See merge request !1

We do this as we can not read them properly online as a artifact without downloading.

The local storage per thread is only a pointer, this must be assigned AFTER the local storage object has moved to it's final location (e.g. on the stack of the caller). We might even change this a little further in the future to make the location of the state object more transparent.