Infinite_T Mfc

Infinite_T Mfc

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March 20, 2013

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Welcome to the first windows tutorial. In this tutorial, I'll give you the basic information on how to code in windows and we'll go over a few important details first. The basic windows program has two important functions inside. The first one is the event handler(I'll talk about this one later on) and the second one is the main function(WinMain from now on). WinMain is similar to DOS' main function, in fact, WinMain is called from the DOS main function but in windows, we don't have access to the DOS main; everything is covered up by windows. Windows introduces us to messages. A message could be easily described as a pile of data that gets sent to the event handler…
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Represents the access-control mechanism used in controlling access to a resource in a multithreaded program.
CSingleLock doesn't have a base class.
In order to use the synchronization classes CSemaphore , CMutex , CCriticalSection , and CEvent , you must create either a CSingleLock or CMultiLock object to wait on and release the synchronization object. Use CSingleLock when you only need to wait on one object at a time. Use CMultiLock when there are multiple objects that you could use at a particular time.
To use a CSingleLock object, call its constructor inside a member function in the controlled resource's class. Then call the IsLocked member function to determine if the resource is available. If it is, continue with the remainder of the member function. If the resource is unavailable, either wait for a specified amount of time for the resource to be released, or return failure. After use of the resource is complete, either call the Unlock function if the CSingleLock object is to be used again, or allow the CSingleLock object to be destroyed.
CSingleLock objects require the presence of an object derived from CSyncObject . This is usually a data member of the controlled resource's class. For more information on how to use CSingleLock objects, see the article Multithreading: How to Use the Synchronization Classes .
pObject
Points to the synchronization object to be accessed. Can’t be NULL .
bInitialLock
Specifies whether to initially attempt to access the supplied object.
This function is generally called from within an access member function of the controlled resource.
Determines if the object associated with the CSingleLock object is nonsignaled (unavailable).
Nonzero if the object is locked; otherwise 0.
Call this function to gain access to the resource controlled by the synchronization object supplied to the CSingleLock constructor.
dwTimeOut
Specifies the amount of time to wait for the synchronization object to be available (signaled). If INFINITE , Lock will wait until the object is signaled before returning.
Nonzero if the function was successful; otherwise 0.
If the synchronization object is signaled, Lock will return successfully and the thread now owns the object. If the synchronization object is nonsignaled (unavailable), Lock will wait for the synchronization object to become signaled up to the number of milliseconds specified in the dwTimeOut parameter. If the synchronization object didn't become signaled in the specified amount of time, Lock returns failure.
Releases the synchronization object owned by CSingleLock .
lCount
Number of accesses to release. Must be greater than 0. If the specified amount would cause the object's count to exceed its maximum, the count isn't changed and the function returns FALSE .
lPrevCount
Points to a variable to receive the previous count of the synchronization object. If NULL , the previous count isn't returned.
Nonzero if the function was successful; otherwise 0.
This function is called by CSingleLock 's destructor.
If you need to release more than one access count of a semaphore, use the second form of Unlock and specify the number of accesses to release.
Determines if the object is locked.

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1. what does "taking infinite input" mean?
2. there is ALWAYS a reason your program does something whether you understand it or not.

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Priyanka Somani

25-Mar-21 5:06am

When I comment the incremental line in for loop. Then program runs and gives output but wrong. Thus is means that it is bcz of these incremental or decrement in loops Can you tell a good debugger as I don't know anything about debugger
I use Visual Studio and it is quite good. I don't know about any other debuggers. If you can't find one then a few printf statements can help. I will revise my solution to show you what that might look like.

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Your code compiles fine in a finite time.
Probably you meant that its execution time is infinite. In such a case you should, at least, tell us what are the requirements, the input values and the expected output ones.

Priyanka Somani

25-Mar-21 4:35am

You did not report the requirements (that is 'what your code is supposed to do?').

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