49fe9592a4
The thread calls poll() to wait until a HUP (or other error event) happens on the client connection. If so, it sends SIGINT to the main thread, which is then cleaned up normally. This is much nicer than messing around with SIGPOLL.
43 lines
841 B
C++
43 lines
841 B
C++
#pragma once
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#include <thread>
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#include <poll.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <signal.h>
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namespace nix {
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class MonitorFdHup
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{
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private:
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std::thread thread;
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public:
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MonitorFdHup(int fd)
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{
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thread = std::thread([&]() {
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/* Wait indefinitely until a POLLHUP occurs. */
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struct pollfd fds[1];
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fds[0].fd = fd;
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fds[0].events = 0;
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if (poll(fds, 1, -1) == -1) {
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if (errno != EINTR) abort(); // can't happen
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return; // destructor is asking us to exit
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}
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/* We got POLLHUP, so send an INT signal to the main thread. */
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kill(getpid(), SIGINT);
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});
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};
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~MonitorFdHup()
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{
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pthread_kill(thread.native_handle(), SIGINT);
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thread.join();
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}
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};
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}
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