X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=t%2Flib%2FDBICTest%2FBaseSchema.pm;h=0e1e5e23252f65787aa44f20c058e49252ceff71;hb=e952df766c89f1fd6e7e2e1289162b5c6773e65c;hp=ea7088a8c3e8b6884101cf4ad553c0b0fd5222be;hpb=bedbc8111dbbb98f89a36c3cf4e2f6903a4b01be;p=dbsrgits%2FDBIx-Class.git

diff --git a/t/lib/DBICTest/BaseSchema.pm b/t/lib/DBICTest/BaseSchema.pm
index ea7088a..0e1e5e2 100644
--- a/t/lib/DBICTest/BaseSchema.pm
+++ b/t/lib/DBICTest/BaseSchema.pm
@@ -6,5 +6,166 @@ use warnings;
 
 use base qw(DBICTest::Base DBIx::Class::Schema);
 
+use Fcntl qw(:DEFAULT :seek :flock);
+use Time::HiRes 'sleep';
+use DBICTest::Util::LeakTracer qw(populate_weakregistry assert_empty_weakregistry);
+use DBICTest::Util 'local_umask';
+use namespace::clean;
+
+our $locker;
+END {
+  # we need the $locker to be referenced here for delayed destruction
+  if ($locker->{lock_name} and ($ENV{DBICTEST_LOCK_HOLDER}||0) == $$) {
+    #warn "$$ $0 $locker->{type} LOCK RELEASED";
+  }
+}
+
+my $weak_registry = {};
+
+sub connection {
+  my $self = shift->next::method(@_);
+
+# MASSIVE FIXME
+# we can't really lock based on DSN, as we do not yet have a way to tell that e.g.
+# DBICTEST_MSSQL_DSN=dbi:Sybase:server=192.168.0.11:1433;database=dbtst
+#  and
+# DBICTEST_MSSQL_ODBC_DSN=dbi:ODBC:server=192.168.0.11;port=1433;database=dbtst;driver=FreeTDS;tds_version=8.0
+# are the same server
+# hence we lock everything based on sqlt_type or just globally if not available
+# just pretend we are python you know? :)
+
+
+  # when we get a proper DSN resolution sanitize to produce a portable lockfile name
+  # this may look weird and unnecessary, but consider running tests from
+  # windows over a samba share >.>
+  #utf8::encode($dsn);
+  #$dsn =~ s/([^A-Za-z0-9_\-\.\=])/ sprintf '~%02X', ord($1) /ge;
+  #$dsn =~ s/^dbi/dbi/i;
+
+  # provide locking for physical (non-memory) DSNs, so that tests can
+  # safely run in parallel. While the harness (make -jN test) does set
+  # an envvar, we can not detect when a user invokes prove -jN. Hence
+  # perform the locking at all times, it shouldn't hurt.
+  # the lock fh *should* inherit across forks/subprocesses
+  #
+  # File locking is hard. Really hard. By far the best lock implementation
+  # I've seen is part of the guts of File::Temp. However it is sadly not
+  # reusable. Since I am not aware of folks doing NFS parallel testing,
+  # nor are we known to work on VMS, I am just going to punt this and
+  # use the portable-ish flock() provided by perl itself. If this does
+  # not work for you - patches more than welcome.
+  if (
+    ! $DBICTest::global_exclusive_lock
+      and
+    ( ! $ENV{DBICTEST_LOCK_HOLDER} or $ENV{DBICTEST_LOCK_HOLDER} == $$ )
+      and
+    ref($_[0]) ne 'CODE'
+      and
+    ($_[0]||'') !~ /^ (?i:dbi) \: SQLite \: (?: dbname\= )? (?: \:memory\: | t [\/\\] var [\/\\] DBIxClass\-) /x
+  ) {
+
+    my $locktype = do {
+      # guard against infinite recursion
+      local $ENV{DBICTEST_LOCK_HOLDER} = -1;
+
+      # we need to connect a forced fresh clone so that we do not upset any state
+      # of the main $schema (some tests examine it quite closely)
+      local $SIG{__WARN__} = sub {};
+      local $@;
+      my $storage = eval {
+        my $st = ref($self)->connect(@{$self->storage->connect_info})->storage;
+        $st->ensure_connected;  # do connect here, to catch a possible throw
+        $st;
+      };
+      $storage
+        ? do {
+          my $t = $storage->sqlt_type || 'generic';
+          eval { $storage->disconnect };
+          $t;
+        }
+        : undef
+      ;
+    };
+
+    # Never hold more than one lock. This solves the "lock in order" issues
+    # unrelated tests may have
+    # Also if there is no connection - there is no lock to be had
+    if ($locktype and (!$locker or $locker->{type} ne $locktype)) {
+
+      # this will release whatever lock we may currently be holding
+      # which is fine since the type does not match as checked above
+      undef $locker;
+
+      my $lockpath = DBICTest::RunMode->tmpdir->file("_dbictest_$locktype.lock");
+
+      #warn "$$ $0 $locktype GRABBING LOCK";
+      my $lock_fh;
+      {
+        my $u = local_umask(0); # so that the file opens as 666, and any user can lock
+        sysopen ($lock_fh, $lockpath, O_RDWR|O_CREAT) or die "Unable to open $lockpath: $!";
+      }
+      flock ($lock_fh, LOCK_EX) or die "Unable to lock $lockpath: $!";
+      #warn "$$ $0 $locktype LOCK GRABBED";
+
+      # see if anyone was holding a lock before us, and wait up to 5 seconds for them to terminate
+      # if we do not do this we may end up trampling over some long-running END or somesuch
+      seek ($lock_fh, 0, SEEK_SET) or die "seek failed $!";
+      my $old_pid;
+      if (
+        read ($lock_fh, $old_pid, 100)
+          and
+        ($old_pid) = $old_pid =~ /^(\d+)$/
+      ) {
+        for (1..50) {
+          kill (0, $old_pid) or last;
+          sleep 0.1;
+        }
+      }
+      #warn "$$ $0 $locktype POST GRAB WAIT";
+
+      truncate $lock_fh, 0;
+      seek ($lock_fh, 0, SEEK_SET) or die "seek failed $!";
+      $lock_fh->autoflush(1);
+      print $lock_fh $$;
+
+      $ENV{DBICTEST_LOCK_HOLDER} ||= $$;
+
+      $locker = {
+        type => $locktype,
+        fh => $lock_fh,
+        lock_name => "$lockpath",
+      };
+    }
+  }
+
+  if ($INC{'Test/Builder.pm'}) {
+    populate_weakregistry ( $weak_registry, $self->storage );
+
+    my $cur_connect_call = $self->storage->on_connect_call;
+
+    $self->storage->on_connect_call([
+      (ref $cur_connect_call eq 'ARRAY'
+        ? @$cur_connect_call
+        : ($cur_connect_call || ())
+      ),
+      [sub {
+        populate_weakregistry( $weak_registry, shift->_dbh )
+      }],
+    ]);
+  }
+
+  return $self;
+}
+
+sub clone {
+  my $self = shift->next::method(@_);
+  populate_weakregistry ( $weak_registry, $self )
+    if $INC{'Test/Builder.pm'};
+  $self;
+}
+
+END {
+  assert_empty_weakregistry($weak_registry, 'quiet');
+}
 
 1;