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AnswerRe: WCHAR copy one char at a time Pin
Richard MacCutchan2-Feb-14 21:56
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QuestionPlease describe overlapped operations Pin
bkelly1319-Jan-14 9:16
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AnswerRe: Please describe overlapped operations Pin
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GeneralRe: Please describe overlapped operations Pin
bkelly1320-Jan-14 3:46
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Hello Richard,
In at least one MSDN help page about socket functions, they write that overlapped is not the same as sync and async. They work together but are not the same. As I interpret the pages:

Overlapped means having multiple buffers submitted for I/O at one time. The app can, for example post four sends with four separate addresses (addresses of buffers to send). After the four posts it can be the case that none of them have been signaled as complete. The operating system will then signal each of the four I/Os as being complete some time later. The application must not disturb those buffers until each one has been signaled as complete.

As each one is signaled complete, the application can re-use that buffer, but not until then.

In the WSASend function argument six is structure WSAOVERLAPPED. We can use WSASend and other TCP/IO functions with async but without overlapped. Or with overlapped.

Is my interpretation correct, as far as it goes?
Thanks for your time
If you work with telemetry, please check this bulletin board: http://www.bkelly.ws/irig_106/


modified 20-Jan-14 12:17pm.

GeneralRe: Please describe overlapped operations Pin
Richard MacCutchan20-Jan-14 6:38
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GeneralRe: Please describe overlapped operations Pin
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QuestionWinsock Peer to Peer using UDP and TCP Pin
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Generallink error 1104 Pin
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