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linuxpthreadssignalsinterruptsystem-calls
Timmmm
Timmmm

Reputation: 96556

Interrupting syscalls in threads on linux

I have a pthread that runs in a loop, calling accept() in a blocking manner. Is there any way to interrupt that call from another thread? Everything points to sending the thread a signal, but apparently you can only send a process a signal.

I can't just kill the thread because then it leaves the socket open. And that's not very clean anyway. Is there really no way to do this?

Upvotes: 3

Views: 3746

Answers (2)

Šimon Tóth
Šimon Tóth

Reputation: 36433

Either use select(), or send the singal to the process (this will be a problem if you just want to interupt one of the threads).

Upvotes: -1

cnicutar
cnicutar

Reputation: 182619

You can signal a thread using pthread_kill(3).

The pthread_kill() function sends the signal sig to thread, another thread in the same process as the caller.

If a signal handler is installed, the handler will be invoked in the thread thread.

Note, you don't have to kill the thread; you can send a signal that simply makes accept fail with EINTR.

Upvotes: 7

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