Multithreading Applications in Win32: The Complete Guide to by Jim Beveridge

By Jim Beveridge

Utilizing a number of threads, you could create high-performance servers, construct extensions for net servers, benefit from multiprocessor structures, construct refined items in OLE and COM, and increase software responsiveness. Writing such software program calls for greater than idea and a reference guide; it calls for a accomplished knowing of the way every little thing matches jointly and a advisor to what works and what does not. Multithreading is supported less than home windows NT and home windows ninety five and later throughout the Win32 API, yet insurance of this crucial subject has been sporadic and incomplete in the past. In Multithreading functions in Win32, with simply enough thought and plenty of pattern code, Jim Beveridge and Bob Wiener convey builders whilst, the place, and the way to take advantage of multithreading. integrated within the ebook are: *Internet improvement examples, together with ISAPI and WinSock. *Hands-on insurance of ways to take advantage of threads and overlapped I/O for server improvement. *How to take advantage of the C run-time library and MFC in a multithreaded setting. *Examples in C and C++. *Comparisons to UNIX for builders transitioning from UNIX to Win32.The linked site comprises the code and pattern functions from the booklet, together with code that works with web WinSock. 0201442345B04062001

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If it ever got interrupted, then it would create a race condition when it was trying to solve one. Checking and setting a flag is such a common operation that it is implemented in hardware on many processors. It is called the Test and Set instruction. In practice, only the operating system will use the Test and Set instruction. The operating system provides high-level mechanisms that your program may use instead of Test and Set. The first part of this book goes over techniques that manage situations in which race conditions could happen.

If the thread ID is not needed, the parameter IpThreadld may be NULL on Windows 95, but not on Windows NT. If you are writing a program that must run on Windows NT, do not pass NULL for /pThreadld. IMPORTANT! The way this function works can be tricky to grasp at first because it is unlike anything else in conventional programming. To provide a starting point I'll contrast the use of CreateThread() with how a function call works. Listing 2- I shows a function call side by side with a thread startup.

The thread ID is a global value that uniquely refers to the thread from any process in the system. The thread ID is used by Win32 API functions such as AttachThreadlnput () and PostThreadMessage ( ). These functions allow threads to affect each other's message queues. The thread ID is also used by debuggers and process viewers. To enforce security, it is not possible to obtain a thread handle from a thread ID. The handle returned by CreateThread () refers to a kernel object. DLL. There are many similarities between the two kinds of objects.

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