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# see how CODE REFs are created and then freed
# this tests that coderefs are properly freed (for garbage collection)
#
# since the AV in the command table entry never gets freed
# in v1.02
# it gains 1 for the PVCV in AV(newSVsv($sub),undef,ST(0),FLAGS) in the command table entry
# and 1 for the PVCV in $anon_ref{'::perl::CODE...'}=$sub
#
# in v1.05
# it gains 1 for the PVCV in AV(newSVsv($sub),undef,ST(0),FLAGS) in the command table entry
#
use Tcl;
use strict; use warnings;
$| = 1;
print "1..1\n";
my $inter=Tcl->new();
my @queue;
my $sub;
$sub=sub{
return unless (scalar(@queue));
my $line =shift @queue;
return unless (scalar(@queue));
$inter->call('after',300,$sub);
};
my @ctpre=refcts($sub);
print '0 '.join(' ',@ctpre)."\n";
my @ctpost;
for my $run (1..9) {
for my $ii (1..4) {push @queue,'ok '.$ii; }
$inter->call('after',50,$sub);
flush_afters($inter);
if ($Tcl::VERSION eq '1.02') {
# have to kinda cheat and do it by hand in 1.02
# it didnt have code cleaup at all
my $tclname='::perl::'.$sub;
$inter->delete_ref($tclname);
}
@ctpost=refcts($sub);
print "cycle:$run cts:".join(' ',@ctpost)."\n";
}
if ($ctpre[0]==$ctpost[0] && $ctpre[1]==$ctpost[1]) { print "ok 1 - refcts \n";}
else {
unless ($ctpre[0] == $ctpost[0]) { print STDERR "SvREFCNT $ctpre[0]!=$ctpost[0]\n"; }
unless ($ctpre[1] == $ctpost[1]) { print STDERR "refcount $ctpre[1]!=$ctpost[1]\n"; }
print "not ok 1 - refcts \n";
}
exit;
sub test_use {
my $use=shift;
my $useok=0;
my $bad='';
eval {
$useok =eval $use.';1';
unless ($useok) { $bad=$use; }
};
return $bad;
}
BEGIN {
my $use_bad='';
$use_bad.=test_use ('use Devel::Peek qw( SvREFCNT Dump)');
$use_bad.=test_use ('use Devel::Refcount qw( refcount )');
if ($use_bad) {
print "1..0 # skip because: not installed $use_bad \n";
exit;
};
} # begin
sub refcts {
# printf "SvREFCNT=%d refcount=%d\n",SvREFCNT( $_[0] ), refcount( $_[0]) ;
return (SvREFCNT( $_[0] ), refcount( $_[0]));
} # refcts
sub flush_afters{
my $inter=shift;
while(1) { # wait for afters to finish
my @info0=$inter->icall('after', 'info');
last unless (scalar(@info0));
$inter->icall('after', 300, 'set var fafafa');
$inter->icall('vwait', 'var'); # will wait for .3 seconds
}
} # flush afters
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