2013/1/19 Peter Portante firstname.lastname@example.org:
I noticed while stracing a process that sock.setblocking() calls always result in pairs of fcntl() calls on Linux. Checking 2.6.8, 2.7.3, and 3.3.0 Modules/socketmodule.c, the code seems to use the following (unless I have missed something):
delay_flag = fcntl(s->sock_fd, F_GETFL, 0); if (block) delay_flag &= (~O_NONBLOCK); else delay_flag |= O_NONBLOCK; fcntl(s->sock_fd, F_SETFL, delay_flag);
Perhaps a check to see the flags changed might be worth making?
Considering most sockets are only set to blocking once, this doesn't seem very useful.