libutp in a multi-thread application

[gregoiregentil]

Hello,

Thank you for your efforts on this library. It's a lot of work.

This is not really a bug report, it could be seems as a feature request, or more likely, it's a call for advice.

I'm trying to use libutp in a multi-thread applications with multiple UTP communication over a single UDP socket. I have read the warning in the paragraph Interface of the readme.

I have one instance of:

`
socketUDP = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
bind(socketUDP, (struct sockaddr*)(&si_me), sizeof(si_me));
ctx = utp_init(2);
utp_set_callback(ctx, ...);

struct pollfd pollfds[1];
pollfds[0].fd = socketUDP;
pollfds[0].events = POLLIN;
while (1) {
poll(pollfds, 1, -1);
if (pollfds[0].revents & POLLIN) {
recvfrom(socketUDP,
utp_process_udp(ctx, socket_data, len, (struct sockaddr *)&src_addr, addrlen);
}
}
`

I have multiple instances from different threads:

utp_socket *sock = utp_create_socket(ctx); utp_connect(sock, (struct sockaddr *)&sin, sizeof(sin)); utp_write(sock, ...);

I have in place a system NOT to mix the different 'write' buffers.

Nevertheless, the library doesn't like it and I get crashes especially when utp_write happen at the same time.

Is there an example or a paper suggesting how to use libutp in a multi-thread app?