tcpip_callbackmsg_trycallback_fromisr() function
Try to post a callback-message to the tcpip_thread mbox. Same as tcpip_callbackmsg_trycallback but calls sys_mbox_trypost_fromisr(), mainly to help FreeRTOS, where calls differ between task level and ISR level. @see tcpip_callbackmsg_new()
Arguments
msg
pointer to the message to post
Return value
sys_mbox_trypost_fromisr() return code (without change, so this knowledge can be used to e.g. propagate "bool needs_scheduling")