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(UNIX) Are there conflicts between sleep/usleep functions and CVI timers?

I have converted a Windows-CVI application, that consists primarily of CVI components mixed with external DLLs, over to a Solaris application that has now included the DLLs as static libraries. A couple of the DLLs that are used to acquire data make use of
Sleep/sleep/usleep functions which seem to be conflicting with some of the CVI timers. In reviewing the UNIX man pages, the sleep functions can corrupt any
other use of timers made available via getitimer/setitimer calls. Does CVI use these timers and if so, which ones (the man pages indicates that each process has four interval timers availabe).
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