How to check for pointer validity ?

[Geoffrey OMWAVE]

The SDK function sd_ble_uuid_vs_add may return NRF_ERROR_INVALID_ADDR If p_vs_uuid or p_uuid_type is NULL or invalid.

When the pointer is not NULL, how does this function tell wether it is "invalid" or not? I would like to perform the same test.

Context: I am implementing an initialisation function that takes the same p_uuid_type parameter and calls this function if it needs to (buffers p_uuid_type to a local variable). Right now I am only able to check the provided pointer is not NULL.

[Carles]

Hi there,

Currently the SoftDevice only check the pointer validity in terms of RAM address range. As long as your pointer is not NULL and points to a valid address in the IC's RAM (i.e. 0x20000000 - 0x20004000) it will be accepted as valid by the SoftDevice.

Carles

[Carles]

I don't think we provide such macros. I have edited my answer for precision too. The "is_word_aligned" should only be used if the SVC explicitely requires in its documentation to provide a pointer to aligned memory (i.e. an address that is a multiple of 4 for example)