[Olsr-dev] RFC: Infrastructure for plugins with sockets

[Henning Rogge]

Hello,

I'm writing this down so we can talk about it and the idea doesn't get lost.

At the moment Olsrd has no support for multithreading. Instead of locking the 
mainloop from a (or multiple) plugin(s) I suggest we enhance the  
add_olsr_socket() function with an additional parameter called "realtime":

void add_olsr_socket(int fd, olsr_bool realtime, void(*pf)(int fd));

This way a plugin can decide if it needs to be contacted directly when a 
package arrives or if it can wait for the next polling cycle.

In the olsr_scheduler_sleep() function we can use a select() statement to wait 
for packages from all realtime sockets while using the timeout parameter to 
wait for the next polling cycle.

I think this sollution will be as flexible as a locking mechanism without 
needing support for multithreading at all.

Henning

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Diplom-Informatiker Henning Rogge
Forschungsgesellschaft für
Angewandte Naturwissenschaften e. V. (FGAN) 
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