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Resource manager can't open it's own device

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Applicable Environment

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Topic: Resource Manager
SDP: 6.5.0SP1
Target: Any supported target

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Question

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I create a resource manager and in another thread in the same process try to connect to my own device, but it always fails with NOTTY. I can open device from other processes.

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Solution

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In general, it"s not a good idea to create a design where one thread in a resmgr does an open on the resmgr device. It creates potential for deadlock. If you are absolutely sure that the thread doing the open is never involved in servicing device requests, it can be done by specifying the _RESMGR_FLAG_SELF flag to resgmr_attach. For more info. look up resmgr_attach in the library reference.

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NOTE: This entry has been validated against the SDP version listed above. Use caution when considering this advice for any other SDP version. For supported releases, please reach out to QNX Technical Support if you have any questions/concerns.

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