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plan(15);
my class Lock is repr('ReentrantMutex') { }
my class CondVar is repr('ConditionVariable') { }
# 2 tests
{
my $l := Lock.new;
nqp::lock($l);
{ ok(1, 'Code runs under lock'); }
nqp::unlock($l);
nqp::lock($l);
{ ok(1, 'Lock can be used more than once'); }
nqp::unlock($l);
}
# 5 tests
{
my $l := Lock.new;
my $died := 0;
my $thrown_message := 'Dying with lock held';
my $caught_message := '';
{
nqp::lock($l);
nqp::die($thrown_message);
CATCH {
$died := 1;
$caught_message := $_;
nqp::unlock($l);
}
}
ok($died, 'Can die with a lock held and CATCH it');
ok($thrown_message eq $caught_message,
'Got expected message from die with lock held');
{
nqp::lock($l);
ok(1, 'Can unlock in CATCH and relock after');
nqp::unlock($l);
}
my $t := nqp::newthread({
nqp::lock($l);
ok(1, 'Lock that survived CATCH works in another thread too');
nqp::unlock($l);
}, 0);
nqp::threadrun($t);
nqp::threadjoin($t);
{
nqp::lock($l);
ok(1, 'Lock from CATCH and other thread works in main thread again');
nqp::unlock($l);
}
}
# 2 tests
# XXXX: Currently slow on nqp-j, and probably too fast on nqp-m
{
my $l := Lock.new;
my $count := 100_000;
my $output := '';
my $t1 := nqp::newthread({
nqp::lock($l);
my $i := 0;
while ++$i <= $count {
$output := $output ~ 'a';
}
nqp::unlock($l);
}, 0);
my $t2 := nqp::newthread({
nqp::lock($l);
my $i := 0;
while ++$i <= $count {
$output := $output ~ 'b';
}
nqp::unlock($l);
}, 0);
nqp::threadrun($t1);
nqp::threadrun($t2);
nqp::threadjoin($t1);
nqp::threadjoin($t2);
ok($output ~~ /^ [ a+: b+: | b+: a+: ] $/,
'Lock is at least somewhat effective');
ok(nqp::chars($output) == 2 * $count, 'Result is correct length');
}
# 2 tests
{
my $l := Lock.new;
my $c := nqp::getlockcondvar($l, CondVar);
ok(nqp::defined($c), 'Can create condition variable from lock');
my $now1 := 0;
my $now2 := nqp::time();
my @log;
my $t1 := nqp::newthread({
nqp::lock($l);
nqp::push(@log, 'ale');
until nqp::elems(@log) == 2 {
nqp::condwait($c);
}
nqp::push(@log, 'stout');
nqp::condsignalall($c);
$now1 := nqp::time();
nqp::unlock($l);
}, 0);
nqp::threadrun($t1);
my $elems := 0;
until $elems == 1 {
nqp::lock($l);
$elems := nqp::elems(@log);
nqp::unlock($l);
}
my $t2 := nqp::newthread({
nqp::lock($l);
nqp::push(@log, 'porter');
nqp::condsignalone($c);
until nqp::elems(@log) == 3 {
nqp::condwait($c);
}
nqp::push(@log, 'lager');
nqp::unlock($l);
}, 0);
nqp::threadrun($t2);
nqp::threadjoin($t1);
$now2 := nqp::time();
nqp::threadjoin($t2);
my $ok := nqp::join(',', @log) eq 'ale,porter,stout,lager';
ok($ok, 'Condition variable worked');
say("# log = {@log}{ $now1 > $now2 ?? ', thread was running *after* join' !! ''}") if !$ok;
}
# 4 tests
{
my $l := Lock.new;
my $c1 := nqp::getlockcondvar($l, CondVar);
my $c2 := nqp::getlockcondvar($l, CondVar);
ok(nqp::defined($c1) && nqp::defined($c2),
'Can create more than one condvar from same lock');
ok(nqp::where($c1) != nqp::where($c2),
'Multiple condvars from same lock are different');
my $count_one := 0;
my $count_all := 0;
my $t1 := nqp::newthread({
nqp::lock($l);
nqp::condsignalone($c1);
nqp::condsignalall($c2);
nqp::unlock($l);
}, 0);
my $t2 := nqp::newthread({
nqp::lock($l);
nqp::condwait($c1);
$count_one++;
nqp::unlock($l);
}, 0);
my $t3 := nqp::newthread({
nqp::lock($l);
nqp::condwait($c1);
$count_one++;
nqp::unlock($l);
}, 0);
my $t4 := nqp::newthread({
nqp::lock($l);
nqp::condwait($c2);
$count_all++;
nqp::unlock($l);
}, 0);
my $t5 := nqp::newthread({
nqp::lock($l);
nqp::condwait($c2);
$count_all++;
nqp::unlock($l);
}, 0);
# Start all waiting threads
nqp::threadrun($t2);
nqp::threadrun($t3);
nqp::threadrun($t4);
nqp::threadrun($t5);
nqp::sleep(1.0);
# Start signaling thread
nqp::threadrun($t1);
# Check for condsignalone result, then signal it again to unblock
nqp::sleep(2.0);
my $c1_snap := $count_one;
nqp::lock($l);
nqp::condsignalone($c1);
nqp::unlock($l);
# Join 'em up
nqp::threadjoin($t2);
nqp::threadjoin($t3);
nqp::threadjoin($t4);
nqp::threadjoin($t5);
nqp::threadjoin($t1);
ok($c1_snap == 1, 'condsignalone signaled exactly one waiting thread');
ok($count_all == 2, 'condsignalall signaled both waiting threads');
}
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