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93

answers:

1
Q: 

Are BSD/Posix sockets reentrant?

Can several threads operate on the same socket descriptor, i.e accept(sock_fd) at the same time without concern?

The platform I'm mostly interested in is POSIX/Linux.

+1  A: 

Yes, they are "reentrant" - kernel locks the socket structure while working on it (see Linux accept source for example), so only one thread would get the client connection.

Nikolai N Fetissov  2010-01-25 15:33:44

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