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Revista CD Expert 32
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BC5
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EXAMPLES
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SERIES
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THREADS
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readme.txt
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1997-03-25
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3KB
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55 lines
Threads - Based on GEN32. A simple threading sample.
THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
PARTICULAR PURPOSE.
Copyright (C) 1993-1995 Microsoft Corporation. All Rights Reserved.
PURPOSE:
To demonstrate thread creation and destruction.
USES:
Based on GEN32.
COMMENTS:
This is a very simple thread demonstration program. It divides
the main window into 4 child windows and allows the user to
control the creation and deletion of 4 threads. The threads
are: 1) A simple count from 1 to the maximum int 2) A calculation
of the Greatest Common Divisor for two numbers 3) A calculation
of all the prime numbers between 1 and MAX_INT and 4) Drawing
random rectangles.
The key structure to the Threads sample is ThreadInfo. An array
of these structures contain the window handles of the respective
threads, the height and width of the client area of the child
windows, and the state flag of the thread. The state flag
indicates whether the thread is excuting or not.
MODULE MAP:
Dispatch- Message dispatching routines
WinMain - Calls initialization functions and processes the message loop
Threads - Implements the windows procedure for the main application
window. It also has the dispatch loops for messages and
commands. For the Threads sample, this source module
contains message handlers and cmd handlers.
Init - Performs application and instance specific initialization
About - Defines a standard about dialog box.
Misc - Defines the applications specific commands not related to
a specific module.
Threads - Threads contains the dispatch loop for the child windows,
the WM_THREADSTATE message handler, the WM_SIZE handler
for the child windows, and the thread procedures.
The threads themselves are not designed to do anything
terribly interesting. If you were designing an application
which made use of threads, you probably wouldn't want
to have threads that are as impolite as these. The reason
the threads in this sample are impolite is that they loop
while TRUE and never worry about setting priorities or
synchronizing their execution.