empty: This function returnsTrueif the queue is empty and contains no items. Otherwise, it returnsFalse. This function is often used to determine if moregetoperations are required to service the queue. full: This function returnsTrueif the queue has reached its maximum size and has no more ...
Checking that heap contains the item. This operation is O(1). remove( item ) Removes the item from the heap. Returns true if item was in the heap and false otherwise. This operation is O(logn). update( item, priority ) Changes item priority. Returns true if item was in the queue (...
number is moved along with the relative weight during the sort. Once the sort is complete, the priority queue contains a sorted list of queues and their relative weights, where the first element names the highest priority queue, the second element names the second highest priority queue and so...
I was recently solving a leet code question that looks efficient with a priority queue. Now, coming from a C# background, where PriorityQueue is an out-of-the-box feature, it makes me wonder if Python contains something similar. This landed me on a Python module called Heapq, which ...
CBPQ: High Performance Lock-Free Priority Queue Anastasia Braginsky1(B), Nachshon Cohen2, and Erez Petrank2 1 Yahoo Research, Haifa, Israel anastas@yahoo-inc.com 2 Technion - Israel Institute of Technology, Haifa, Israel {ncohen,erez}@cs.technion.ac.il Abstract. Priority queues are an ...
In a discrete-time setting, consider a queue with infinite waiting room and a single server serving 2 types of customers in FCFS order. When customers of different types enter the system during the same slot (i.e., simultaneously), the type-1 customers among them are served first. This pr...
The leaf nodes 32 of the tree arbiter 30 are each associated with a queue or buffer 34 which contains requests. In general, the tree arbiter 30 has N leaf nodes 32 and the requests can belong to P priority classes. In the example of FIG. 2A, P-3 so that the priority classes 1, ...
An unguarded select clause governing a set of task accepts must select first the accept whose queue currently contains the highest priority calling task. A task must always run at the greater of its own priority or the priority of the highest priority task on any of its entry queues. This ...
In a b-bandwidth, n-item priority queue in which every node contains b items in sorted order, the first implementation achieves optimal speed-up of O[min{log n, b(log n)/(log b+log log n)}] for inserting b pre-sorted items or deleting b smallest items, where b=O(n/sup 1/c/...
1. A method comprising the steps of: enqueuing items in a functional queue prioritized according to sort criteria; modifying the sort criteria while the functional queue contains the enqued items; and re-prioritizing the enqued items in the functional queue according to the modified sort criteria...