Passing context pointer to NRF_SDH_BLE_OBSERVER

RE: Passing context pointer to NRF_SDH_BLE_OBSERVER

Jørgen Holmefjord — Fri, 20 Apr 2018 12:56:22 GMT

Unfortunately, I do not have any alternative solutions other than what have been allready suggested.

RE: Passing context pointer to NRF_SDH_BLE_OBSERVER

charles — Thu, 19 Apr 2018 17:42:12 GMT

I'm Robbie's colleague: the reason we want it is so that we can set a pointer to a dynamically-computed location in RAM. Or, at least, an address that isn't known to the compiler when compiling the module that calls NRF_SDH_BLE_OBSERVER.

The alternative is that we have to make a file-scope variable that acts as a trampoline. Sprinking these kinds of trampoline pointers throughout our codebase makes it very hard to protect them using the MWU in case they get scribbled over by a bug.

RE: Passing context pointer to NRF_SDH_BLE_OBSERVER

Jørgen Holmefjord — Tue, 10 Apr 2018 13:28:51 GMT

Hi,

I'm not sure I understand what you are trying to achieve. How is this different from passing the address of a static variable?

If you look at the definition of NRF_SDH_BLE_OBSERVER, you see that the _context parameter is used as initializer for the static variable created. The parameter cannot be variable as you try to do.

Best regards,
Jørgen