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New Message on BDOTNET
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From: Pandurang_Nayak
Message 3 in Discussion
Here goes:
a. Monitor
Monitors are a locking
mechanism provided for synchronized access to objects. I will explain this in
more detail after telling you about Threading.
b. Boxing and Unboxing:
Data types are of two
types: Value types and Reference types. Value types are the primitive data
types, which are in-built into yor programming language/framework. Typical
examples: Int, Boolean, etc.
Reference types are types
that can be derived from. Most of your objects/classes in the framework are
reference types.
Because of the nature of
these two types you cannot directly assign the value of one type to another
type. Hence you use boxing (value to reference) or unboxing (reference to value)
for interchange of values between types.
c. Threading:
Every process runs in a
thread of its own. If you look at it from the processor's point of view, a
thread is merely a series of instructions issued by a particular process. Now
since many programs are running at one time, multiple threads will be running in
the system. A typical processor can only handly one thread at a time. If in your
program you wish to do some "multi-tasking" - like running a background process
when your foreground application is doing something, you might wish to put the
background process in a seperate thread. In this case, two threads are running
from your application. One your main thread, and one the spawned
thread.
If you wish a piece of code to be accessed
only by ONE thread, you use Monitors to lock that piece of code.
I know I have been quite cryptic. The reason
being I am typing this and doing something parallely. If you have VS.NET
installed, try reading up on MSDN. It has extensive information on all these
topics. You could even try searching on MSDN online if you don't have MSDN
locally.
HTH
Pandurang
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