What is overlapped operation?
Overlapped operations enable a thread to perform a time-consuming I/O operation in the background, leaving the thread free to perform other tasks. The system sets the state of the event object to not-signaled when a call to the I/O function returns before the operation has been completed.
What is file_ flag_ overlapped?
Instructs the system to initialize the object, so that operations that take a significant amount of time to process return ERROR_IO_PENDING. When the operation is finished, the specified event is set to the signaled state.
How do you use overlapped?
1 : to extend over or past and cover a part of The roof shingles overlap each other. 2 : to have something in common with Baseball season overlaps the football season in September. 1 : to occupy the same area in part The two towns overlap.
Has overlapped meaning?
(of two things) to extend or lie partly over (each other) to cover and extend beyond (something) (intr) to coincide partly in time, subject, etc.
What is the meaning of overlapped CPU?
The 1130 system permits input/output devices to operate simultaneously; that is, to overlap their operation with other functions of the CPU. Overlapping I/O operations provides increased data throughput and more efficient utilization of the central processing unit.
What are the use and purpose of the overlap in music?
In music theory, overlap is a synonym for reinterpretation of a chord at the boundary of two musical phrases. Overlap (railway signalling), the length of track beyond a stop signal that is proved to be clear of obstructions as a safety margin.
What is overlap and gap?
Get it … a “gap.” An Overlap is exactly the opposite, and it occurs when the legal descriptions of adjoining properties do not come flush to each other, and each legal description includes a portion of the other. It’s like that space in the middle of a Venn Diagram, which demonstrates where two concepts are combined.
What is overlapping in management?
By definition, overlapping responsibilities refers to a situation in which more than one individual is responsible for the same activity.
What are overlapping symptoms?
Overlap syndromes can be defined as multiple disease states occurring together to produce a unique clinical phenotype and disease behavior, which extends beyond classic IBD and classic EIM.
Is multiprogramming parallel processing?
Multiprogramming is a rudimentary form of parallel processing in which several programs are run at the same time on a uniprocessor. Instead, the operating system executes part of one program, then part of another, and so on. To the user it appears that all programs are executing at the same time.
How do I perform multiple overlapped operations on a single thread?
When performing multiple simultaneous overlapped operations on a single thread, the calling thread must specify an OVERLAPPED structure for each operation. Each OVERLAPPED structure must specify a handle to a different manual-reset event object.
How to synchronize an overlapped operation with the completion of it?
To synchronize its execution with the completion of the overlapped operation, the calling thread uses the GetOverlappedResult function, the GetOverlappedResultEx function, or one of the wait functions to determine when the overlapped operation has been completed. You can also use the HasOverlappedIoCompleted macro to poll for completion.
What happens if no event object is specified in the OVERLAPPED structure?
If no event object is specified in the OVERLAPPED structure, the system signals the state of the file, named pipe, or communications device when the overlapped operation has been completed.
How do I check if getoverlappedresult has been completed?
You can use the HasOverlappedIoCompleted macro to check whether an asynchronous I/O operation has completed if GetOverlappedResult is too cumbersome for your application. You can use the CancelIo function to cancel an asynchronous I/O operation.