StackOverflow2013

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PO
primarykey
Id
11486577
data
AcceptedAnswerId
0
AnswerCount
0
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0
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CreationDate
2012-07-14T19:05:21.523
FavoriteCount
0
LastActivityDate
2012-07-14T19:38:33.550
LastEditDate
2012-07-14T19:38:33.550
LastEditorUserId
881658
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881658
ParentId
11468333
PostTypeId
2
Score
0
ViewCount
0
LastEditorDisplayName
text
Body
<p>For implementing the pause on a thread, you need to make it wait for some event to happen. Waiting on a spin-lock mutex is CPU cycle wasting. IMHO, this method should not be followed as the CPU cycles could have been used up by other processes/threads. Wait on a non-blocking descriptor (pipe, socket or some other). Example code for using <a href="http://ashishgrover.com/linux-multi-threading-fifos-or-named-pipes/" rel="nofollow">pipes for inter-thread communication</a> can be seen here Above solution is useful, if your second thread has more information from multiple sources than just the pause and resume signals. A top-level select/poll/epoll can be used on non-blocking descriptors. You can specify the wait time for select/poll/epoll system calls, and only that much micro-seconds worth of CPU cycles will be wasted. I mention this solution with forward-thinking that your second thread will have more things or events to handle than just getting paused and resumed. Sorry if it is more detailed than what you asked.</p> <p>Another simpler approach can be to have a shared boolean variable between these threads. Main thread is the writer of the variable, 0 - signifies stop. 1 - signifies resume Second thread only reads the value of the variable. To implement '0' state, use usleep for sime micro-seconds then again check the value. Assuming, few micro-seconds delay is acceptable in your design. To implement '1' - check the value of the variable after doing certain number of operations. Otherwise, you can also implement a signal for moving from '1' to '0' state.</p>
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1. POLinux Threads suspend/resume
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  PTQuestion
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1. PTAnswer
UserLastEditorUserId
1. USGroovy
UserOwnerUserId
1. USGroovy
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