Due to
inherent POSIX limitations, the IBM Open Class collection classes
do not support the described time-out processing in AIX
environment.Like most of the IOC classes, the collection classes require thread safe operation of multithreaded access to global data. The collections may be used in a multithreaded environment, but any single instance of a collection may be referenced by only one thread at a time. Different collections may be accessed concurrently. For example, thread 1 references collection A concurrently with thread 2 referencing collection B.
The collection classes offer built-in Guard objects to simplify the explicit serialization needed to protect the collection instance. While serialization for global data is still necessary, the built-in support helps to reduce the amount of programming required. Note, however, that the locking of elements stored within a collection is the responsibility of the user and is not provided as part of collection class thread safety.
The current implementation does not provide any means to support users who want to program in a multiprocessing environment with the IBM Open Class collection classes having collection instances in shared memory regions executed. It only supports thread safety within a single process.
Due to
inherent POSIX limitations, the IBM Open Class collection classes
do not support the described time-out processing in AIX
environment.
Introduction to the
Collection Classes
Access by Key
Overview of
Iteration
Backward-Compatible
Items
Incompatibilities
Exceptions
Defined and Used by the Collection Classes
Exception
Causes
Guard
Objects
Instantiating a Guard Object
Using
Guard Objects
Adding an
Element to a Collection
Removing an
Element from a Collection
Using
Cursors to Locate and Access Elements
Using
Cursors to Iterate Over a Collection
Using
allElementsDo and Applicators to Iterate Over a Collection
Copying and
Referencing Collections
