Is the data passed to sd_ble_gatts_hvx() queued by value or by reference?

RE: Is the data passed to sd_ble_gatts_hvx() queued by value or by reference?

pcatania — Wed, 03 Dec 2025 00:15:50 GMT

Hi Torbjørn sorry to dig up an old post.

Can I just ask, at what point is it safe to overwrite the p_data memory - I assume when sd_ble_gatts_hvx() returns? But I wanted to check, I've been experiencing crashing when I call this aggressively fast during testing so I want to understand it as much as possible. Can I safely wait for sd_ble_gatts_hvx() to return and immediately overwrite p_data?

Thanks very much.

RE: Is the data passed to sd_ble_gatts_hvx() queued by value or by reference?

brianreinhold — Fri, 18 Mar 2022 15:04:26 GMT

That's what I wanted to know too!

RE: Is the data passed to sd_ble_gatts_hvx() queued by value or by reference?

ovrebekk — Tue, 20 Oct 2020 14:48:28 GMT

You welcome 🙂

RE: Is the data passed to sd_ble_gatts_hvx() queued by value or by reference?

rf_az — Fri, 16 Oct 2020 14:17:56 GMT

That is good news - thank you for the info!

RE: Is the data passed to sd_ble_gatts_hvx() queued by value or by reference?

ovrebekk — Fri, 16 Oct 2020 13:26:59 GMT

When you call sd_ble_gatts_hvx() the data pointed to by p_data will be copied to an internal buffer in the SoftDevice, so there is no need to keep this data in the buffer until the data is sent by the stack.

Best regards
Torbjørn