6 use POSIX qw/SIGINT SIGTERM SIGKILL SIGHUP EXIT_FAILURE/;
8 use IPC::MorseSignals qw/msend mrecv mreset/;
10 use base qw/Exporter/;
12 our @EXPORT_OK = qw/try speed init cleanup/;
16 my ($utf8, $pid, $rdr);
20 die 'forked too many times' if $lives < 0;
21 pipe $rdr, my $wtr or die "pipe() failed: $!";
24 die "fork() failed: $!";
26 close $rdr or die "close() failed: $!";
27 binmode $wtr, ':utf8' if $utf8;
29 my $rcv = mrecv local %SIG, cb => sub {
34 print $wtr $_[0], ':', $_[1], "\n";
38 $SIG{HUP} = sub { mreset $rcv };
39 $SIG{__WARN__} = sub { $block = 1 };
43 close $wtr or die "close() failed: $!";
44 binmode $rdr, ':utf8' if $utf8;
59 sub cleanup { slaughter }
62 my ($msg, $sign) = @_;
67 while (!$ok && (($speed /= 2) >= 1)) {
70 local $SIG{ALRM} = sub { die 'timeout' };
71 local $SIG{__WARN__} = sub { die 'do not want warnings' };
72 my $a = (int(100 * (3 * length $msg) / $speed) || 1);
76 msend $msg => $pid, speed => $speed, utf8 => $utf8, sign => $sign;
79 kill SIGHUP => $pid if $@;
81 if (!defined $r) { # Something bad happened, respawn
82 close $rdr or die "close() failed: $!";
85 $speed *= 2; # Retry this speed
88 if ($r eq ((($sign) ? $$ : 0) . ':' . $msg)) {
95 return ($ok) ? $speed : 0;
99 my ($l, $n, $diag, $res) = @_;
102 my @alpha = ('a' .. 'z');
103 my $msg = join '', map { $alpha[rand @alpha] } 1 .. $l;
104 my $desc_base = "$l bytes sent $n times";
105 while (($ok < $n) && (($speed /= 2) >= 1)) {
106 my $desc = "$desc_base at $speed bits/s";
107 $diag->("try $desc...");
112 local $SIG{ALRM} = sub { die 'timeout' };
113 local $SIG{__WARN__} = sub { die 'do not want warnings' };
114 my $a = (int(100 * (3 * $l) / $speed) || 1);
118 msend $msg => $pid, speed => $speed, utf8 => $utf8, sign => 0;
121 kill SIGHUP => $pid if $@;
123 if (!defined $r) { # Something bad happened, respawn
124 close $rdr or die "close() failed: $!";
127 redo TRY; # Retry this send
130 if ($r eq '0:' . $msg) {
139 push @$res, $desc_base . (($speed) ? ' at ' . $speed . ' bits/s' : ' failed');