问题
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.
回答1:
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.
来源：https://stackoverflow.com/questions/2133224/are-bsd-posix-sockets-reentrant