Originally posted by: mihzaha Hi there I have an array and some threads that want to insert something to the end of the array. The head of the array is a global int variable. How should I do that? I was thinking something like this: atom_inc(&head); array[head]=new_item; but I heard the head is now head+number of threads that want to append (first all the atom_incs from all threads finish then the head is read), not +1 to the first thread, than +2 to the second as I would have liked. (put the threads that want to inc in a list, take the first thread, inc, than the thread reads the head than the second comes and increases once more...) Not all threads add something to the list. How could I do that? Thank you
Following should work for you. oldValue or oldValue + 1 may be your end of the array for that thread based on your initial value of head.
oldValue = atom_inc(&head);
array[oldValue or oldValue + 1] = new_item.
thank you I'm glad it's something simple