xutao
asked on
Cancel blocking socket operation in WinSock 2.0
For some reason, I use blocking socket in my program. Each of my working thread receive UDP data package from a certain port. During the application running, everyting is ok. But when I need to exit the program and tell all the working thread to shut down, the problem occurs. I can't use closesock(...) directly (from other thread), because if I do like this, it will also block (WSARecvFrom(...) is still waiting for the next package). After checking MSDN, I found a WinSock API WSACancelBlockingCall(), but it is only supported by WinSock 1.1. Now my temporary solution is terminate the waiting thread directly, then close the socket. But I feel it not so good, have you a better solution?
Thanks.
Thanks.
Don't use blocking socket calls use ansynchronous calls instead.
This way you can pass a shutdown handle as a parameter to each new thread you start.
Then in your code you can wait for the shutdownhandle to be signalled while waiting for socket events. If it is signalled do your clean up and allow the thread to exit gracefully rather than trying to terminate the thread.
Vin.
This way you can pass a shutdown handle as a parameter to each new thread you start.
Then in your code you can wait for the shutdownhandle to be signalled while waiting for socket events. If it is signalled do your clean up and allow the thread to exit gracefully rather than trying to terminate the thread.
Vin.
xutao:
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You have asked 21 questions here at EE, and you have only resolved 3 of them. Here is a list of your open questions. I will be posting this comment in all of them.
https://www.experts-exchange.com/jsp/qShow.jsp?ta=winntnet&qid=20154615
https://www.experts-exchange.com/jsp/qShow.jsp?ta=networkgen&qid=20154616
https://www.experts-exchange.com/jsp/qShow.jsp?ta=networkgen&qid=20160832
https://www.experts-exchange.com/jsp/qShow.jsp?ta=networkgen&qid=20168293
https://www.experts-exchange.com/jsp/qShow.jsp?ta=networkgen&qid=20171676
https://www.experts-exchange.com/jsp/qShow.jsp?ta=cplusprog&qid=11217097
https://www.experts-exchange.com/jsp/qShow.jsp?ta=cplusprog&qid=11872498
https://www.experts-exchange.com/jsp/qShow.jsp?ta=cplusprog&qid=20133253
https://www.experts-exchange.com/jsp/qShow.jsp?ta=cplusprog&qid=20133912
https://www.experts-exchange.com/jsp/qShow.jsp?ta=cplusprog&qid=20171681
https://www.experts-exchange.com/jsp/qShow.jsp?ta=cplusprog&qid=20171684
https://www.experts-exchange.com/jsp/qShow.jsp?ta=cplusprog&qid=20248551
https://www.experts-exchange.com/jsp/qShow.jsp?ta=cplusprog&qid=20248764
https://www.experts-exchange.com/jsp/qShow.jsp?ta=winprog&qid=20252102
https://www.experts-exchange.com/jsp/qShow.jsp?ta=winprog&qid=20254933
https://www.experts-exchange.com/jsp/qShow.jsp?ta=winprog&qid=20255719
https://www.experts-exchange.com/jsp/qShow.jsp?ta=winprog&qid=20258375
To assist you in your cleanup, I'm providing the following guidelines:
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4. Questions that were not helpful to you should be PAQ'd (stored in the database for their valuable content?even if not valuable to you) or deleted. To PAQ or delete a question, you must first post your intent in that question to make the experts aware. Then, if no experts object after three full days, you can post a zero-point question at community support to request deletion or PAQ. Please include the link(s) to the question(s).
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At that point, a moderator can refund your points and PAQ or delete the question for you. The delete button does not work.
5. If you fail to respond to this cleanup request, I must report you to the Community Support Administrator for further action.
Our intent is to get the questions cleaned up, and not to embarrass or shame anyone. If you have any questions or need further assistance at all, feel free to ask me in this question or post a zero-point question at CS. We are very happy to help you in this task!
thanks!
amp
community support moderator
ASKER
All your suggestions is not to use blocking socket. But what I want to know is how to make it in blocking mode.
Note sent today to Admin re: remaining open questions.
Netminder
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Netminder
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Points refunded and question closed.
Netminder
Community Support Moderator
Experts Exchange
Netminder
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