CMSIS-FreeRTOS

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CMSIS osMessageQueueNew control block allocation issues

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### Background The [CMSIS-RTOS2 api documentation](https://arm-software.github.io/CMSIS_5/RTOS2/html/group__CMSIS__RTOS__Message.html#structosMessageQueueAttr__t) states that when `osMessageQueueNew` is called and `osMessageQueueAttr_t` is interpreted, that when the value of `cb_mem` and `cb_size` in `osMessageQueueAttr_t` are `NULL` and `0`...

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CMSIS-RTOS2 priorities available to user (Low, BelowNormal, Normal, AboveNormal, High, Realtime) are extended with a 3-bit sub priority and CMSIS-RTOS2 implementation can support flexible number of sub priorities (1, 2,...

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