In addition to POSIX signals, QNX also supports other asynchronous. The shared resources used by RTI Connext begin with RTIOsapiSharedMemory*. The calling task blocks if it requests an unavailable semaphore or mutex. To clean up the shared semaphore resources, remove the files listed under /dev/sem/. To see a list of shared semaphores, enter: ls /dev/sem/RTIOsapiSharedMemory* include include int semtimedwait( semt sem, const struct timespec abstimeout) Arguments: sem The semaphore that you want to wait on.To clean up the shared memory resources, remove the files listed under dev/shmem/RTIOsapiSharedMemory*. To see a list of the shared memory resources, enter: ls /dev/shmem/RTIOsapiSharedMemory* To avoid this problem, you need to clean up the shared memory segments in between runs. Therefore, when another RTI Connext application tries to take this semaphore, it waits until the semaphore is unlocked, but that will never happen, resulting in a deadlock. The semopen() function returns a semaphore descriptor that you can use with semwait(), semtrywait(), and sempost(). This happens because while using POSIX, if your RTI Connext application is finished ungracefully while a semaphore is locked, the semaphore will remain locked. message passing, interrupt handling, semaphore handling, mutexes. If you want to have shared-memory support between different users, run the command umask 000 to change the default umask value to 0 before running your RTI Connext application.Īnother known issue is when your RTI Connext application hangs when starting up after killing it a couple of times with CTRL+C. The QNX Core OS test team is seeking talented individuals with a mind for details and. If you have an RTI Connext application running on a QNX machine and it is unable to communicate with other applications running on the same machine started by another user, or if your application fails to start (with an error related to shared memory), then follow the recommendations below.īy default, QNX systems have the umask set so that other users are not allowed to reuse a shared memory handle. Note: Applies to RTI Connext 4.x and above For TI devices designed for use in IoT endpoint applications where power consumption is a key consideration, such as the SimpleLink CC3200 and CC2600 and MSP432 MCU, TI-RTOS offers power management features that enable developers to easily leverage underlying hardware capabilities in the silicon.
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