公开(公告)号：CA2322613A1

公开(公告)日：2002-04-06

申请号：CA2322613

申请日：2000-10-06

Applicant: IBM CANADA

Inventor： LYLE ROBERT W ,  WINER MICHAEL J ,  SACHEDINA AAMER ,  HURAS MATTHEW A

IPC: G06F9/46 ,  G06F9/50

Abstract: A stealable latch mechanism for programming environments supporting concurre nt tasks. The latch mechanism has a function for providing a latch to a requesting task, a function for a task holding a latch to release the held latch, a function for a task holding a latch to ma rk the held latch stealable, and a function for a task holding a latch marked stealable to mark the latch unstealable where the held latch is not marked stolen by another task. The function for providing a latch to a requesting task provides that the requesting task will receive on request a latch marke d stealable and held by a holding task. Any resources associated with the stealable latch are placed in a consistent state prior to the requesting task accessing the resources.