Re: [lwip-users] Core locked checking when using the SNMP netconn implementation

[address@hidden]

Am 13.03.2020 um 09:12 schrieb Harrold Spier:
>
> I wonder whether there is something wrong with the current SNMP app
> implementation.
> As long as all SNMP API functions are called by the same (SNMP) thread,
> there should be no problem.
> In my opinion, only checking for core locked is not valid when using the
> SNMP netconn API.
> But maybe I oversee something.
>
> The benefits of using the netconn API for SNMP is the possibility to run
> the SNMP thread on a much lower priority than the tcpip thread.
>
> I assume the issue can be solved by replacing all calls to
> LWIP_ASSERT_CORE_LOCKED() in the SNMP app by a call to
> LWIP_ASSERT_SNMP_LOCKED() and define LWIP_ASSERT_SNMP_LOCKED as
> LWIP_ASSERT_CORE_LOCKED only if SNMP_USE_RAW == 1.

Yes, that might work. We'd lose the check for the netconn case, but
better than an invalid error that halts the stack...

Regards,
Simon