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|
use FindBin;
require "$FindBin::Bin/wrap.tm";
use File::Slurp;
use Time::HiRes qw(sleep);
use POSIX qw(_exit);
use File::Flock;
use Test::More tests => 20;
use Test::SharedFork;
use strict;
use warnings;
test_lock_held_across_fork();
test_locks_dropped_on_sole_process_exit();
test_locks_dropped_on_multi_process_exit();
test_lock_rename_object();
test_forget_locks();
our $dir; # set in wrap.tt
sub test_lock_held_across_fork
{
my $lock1 = "$dir/lhaf1";
my $lock2 = "$dir/lhaf2";
if (dofork()) {
lock($lock1);
my $l = File::Flock->new($lock2);
write_file("$dir/gate1", "");
POSIX::_exit(0) unless dofork();
write_file("$dir/gate2", "");
sleep(0.1) while ! -e "$dir/gate3";
ok(! -e "$dir/gotlock1a", "lock held");
ok(! -e "$dir/gotlock1b", "obj lock held");
ok(! -e "$dir/gotlock2a", "child lock held");
ok(! -e "$dir/gotlock2b", "child obj lock held");
unlock($lock1);
write_file("$dir/gate4", "");
sleep(0.1) while ! -e "$dir/gate5";
ok(-e "$dir/gotlock3a", "lock released");
ok(! -e "$dir/gotlock3b", "obj lock not released");
$l->unlock();
write_file("$dir/gate6", "");
sleep(0.1) while ! -e "$dir/gate7";
ok(-e "$dir/gotlock4", "obj lock released");
write_file("$dir/gate8", "");
} else {
sleep(0.1) while ! -e "$dir/gate1";
# parent has locked lock
write_file("$dir/gotlock1a", "") if lock($lock1, undef, 'nonblocking');
write_file("$dir/gotlock1b", "") if lock($lock2, undef, 'nonblocking');
sleep(0.1) while ! -e "$dir/gate2";
write_file("$dir/gotlock2a", "") if lock($lock1, undef, 'nonblocking');
write_file("$dir/gotlock2b", "") if lock($lock2, undef, 'nonblocking');
write_file("$dir/gate3", "");
sleep(0.1) while ! -e "$dir/gate4";
write_file("$dir/gotlock3a", "") if lock($lock1, undef, 'nonblocking');
write_file("$dir/gotlock3b", "") if lock($lock2, undef, 'nonblocking');
write_file("$dir/gate5", "");
sleep(0.1) while ! -e "$dir/gate6";
write_file("$dir/gotlock4", "") if lock($lock2, undef, 'nonblocking');
write_file("$dir/gate7", "");
sleep(0.1) while ! -e "$dir/gate8";
exit(0);
}
}
sub test_locks_dropped_on_sole_process_exit
{
my $p = "$dir/tldospe";
my $pid;
if (($pid = dofork())) {
sleep(0.1) while ! -e "$p.gate1";
ok(! lock("$p.lock1", undef, 'nonblocking'), "can't get lock");
write_file("$p.gate2", "");
waitpid($pid, 0);
ok(lock("$p.lock1", undef, 'nonblocking'), "can get lock");
} else {
lock("$p.lock1");
write_file("$p.gate1", "");
sleep(0.1) while ! -e "$p.gate2";
exit(0);
}
}
sub test_locks_dropped_on_multi_process_exit
{
my $p = "$dir/tldompe";
my $pid;
if (($pid = dofork())) {
sleep(0.1) while ! -e "$p.gate1";
ok(! lock("$p.lock1", undef, 'nonblocking'), "can't get lock");
write_file("$p.gate2", "");
waitpid($pid, 0);
ok(lock("$p.lock1", undef, 'nonblocking'), "can get lock");
write_file("$p.gate3", "");
} else {
lock("$p.lock1");
if (dofork()) {
write_file("$p.gate1", "");
sleep(0.1) while ! -e "$p.gate2";
exit(0);
} else {
sleep(0.1) while ! -e "$p.gate3";
exit(0);
}
}
}
sub test_lock_rename_object
{
my $p = "$dir/tlro";
my $l = File::Flock->new("$p.oldlock");
undef $!;
undef $@;
ok(eval {rename("$p.oldlock", "$p.newlock")}, "rename file - $!");
ok(eval {$l->lock_rename("$p.newlock")}, "rename lock - $@");
ok(eval {$l->unlock()}, "unlock - $@");
}
sub test_forget_locks
{
my $p = "$dir/tfl";
my $pid;
if (($pid = dofork())) {
sleep(0.1) while ! -e "$p.gate1";
ok(! lock("$p.lock1", undef, 'nonblocking'), "can't get multi lock");
write_file("$p.gate2", "");
# forget locks
sleep(0.1) while ! -e "$p.gate4";
ok(! lock("$p.lock1", undef, 'nonblocking'), "still can't get multi lock");
write_file("$p.gate5", "");
# sub master quits
waitpid($pid, 0);
ok(kill(0, $pid) == 0, "first proc ($pid) is dead");
ok(! lock("$p.lock1", undef, 'nonblocking'), "and still can't get multi lock");
write_file("$p.gate3", "");
my $pid2 = read_file("$p.gate1");
sleep(0.1) while kill(0, $pid2);
ok(kill(0, $pid2) == 0, "second proc ($pid2) is dead");
ok(lock("$p.lock1", undef, 'nonblocking'), "now can get multi lock");
} else {
lock("$p.lock1");
my $subpid;
if (($subpid = dofork())) {
write_file("$p.gate1", "$subpid");
sleep(0.1) while ! -e "$p.gate2";
forget_locks();
write_file("$p.gate4", "");
sleep(0.1) while ! -e "$p.gate5";
exit(0);
} else {
sleep(0.1) while ! -e "$p.gate3";
exit(0);
}
}
}
sub dofork
{
my $p = fork();
die unless defined $p;
return $p;
}
|
