What is overlapped on Windows?
Overlapped I/O is a name used for asynchronous I/O in the Windows API. It was introduced as an extension to the API in Windows NT. Utilizing overlapped I/O requires passing an OVERLAPPED structure to API functions that normally block, including ReadFile() , WriteFile() , and Winsock’s WSASend() and WSARecv() .
What is overlapped structure?
It is a byte offset from the start of the file or file-like device, and it is specified by the user; the system will not modify these values. The calling process must set this member before passing the OVERLAPPED structure to functions that use an offset, such as the ReadFile or WriteFile (and related) functions.
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.
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 is overlap in statistics?
Overlap statistics examine whether boundaries for two or more variables coincide, or overlap, to a significant extent. BoundarySeer implements methods developed for difference boundaries by Jacquez (1995).
What are overlapping differences?
Overlapping differences is the mixture of one or more differences caused by one main difference. Situations of this kind produce social divisions, when one kind of social difference becomes more important than the other and people start feeling that they belong to different communities.
Why do we want to have the CPU’s operation overlap with that of the I O processing?
When a program has a lot of IO access, those wasted cycles stacks up and become noticeable if you let the CPU wait and do nothing. This is why it’s a good idea to overlap computation with IO so CPU cycles aren’t wasted.
What is the meaning of the word gap?
1 : an opening made by a break or rupture She squeezed through a gap in the fence. 2 : an opening between mountains. 3 : a hole or space where something is missing There are some gaps in his story.