Timers SIGRTMIN is causing Socket Read to error on EINTR

wkhoo · 07-03-2008, 03:12 PM

never used timers before and currently I am experiencing the problem.

I have setup timers to trap on a SIGRTMIN.
I have a blocking socket that does read_socket. whenever the timer expire, the read_socket will return with - and EINTR.

after much searching I discover the issue comes from a Blocking socket implementation.
I cannot change the socket to non-blocking as it will eat up the CPU.

Is there a different way I can implement timers?
or is there a way I can setup a blocking socket to prevent the return of EINTR?

Alexlun · 07-04-2008, 11:05 PM

A better solution is continue to read socket when occurs some EINTR signal.

for example
while(1)
{
ret = read(sockfd...);
if ( ret < 0 && errno == EINTR ) continue;

//do other logic
}