You can write a simple wrapper function for DNS setup and use tcpip_callback to call it from TCPIP thread context. There is also tcpip_try_callback.
Regards, Ajay Bhargav On Wed, Jan 29, 2020, 10:41 PM [email protected] <[email protected]> wrote: > Am 29.01.2020 um 16:37 schrieb [email protected]: > > Dear all, > > > > I would like to ask some questions about the thread-safe functions. > > > > According the http://www.nongnu.org/lwip/2_0_x/pitfalls.html page, in > > the OS mode, all the callback-style APIs function must only be called > > from the TCPIP thread. > > In the OS mode, the functions belongs to NETIF, DHCP, DNS, … modules > > require corresponding thread-safe functions to be used from threads > > different from TCPIP thread. > > For example instead of calling directly the /netif_set_up/ function it’s > > necessary use the /netifapi_netif_set_up/ function, or instead of > > calling directly the /dhcp_start/ function it’s necessary use the > > /netifapi_dhcp_start/ function. > > > > I am looking for the thread-safe function corresponding to the > > /dns_setserver /function. I am using LwIP 2.1.2, but I don’t find it. > > I don't think such a function exists. > > > > > At this point I would know if there is a thread-safe function > > corresponding to the /dns_setserver/ or if I should build a similar > > function myself. In this last case, which function could I take as a > model?. > > The simple solution would be to enable LWIP_TCPIP_CORE_LOCKING and > surround your call with LOCK_TCPIP_CORE()/UNLOCK_TCPIP_CORE(). > > Regards, > Simon > > > > > Thanks in advance for your attention and for your suggestions. > > Regards > > _______________________________________________ > lwip-users mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/lwip-users
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