[ViewVC] Diff of: cvs/deliantra/server/lib/cf.pm

Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.114 by root, Mon Jan 1 16:00:10 2007 UTC vs.
Revision 1.120 by root, Tue Jan 2 11:08:36 2007 UTC

 =cut
 sub to_json($) {
    $JSON::Syck::ImplicitUnicode = 0;  # work around JSON::Syck bugs
    JSON::Syck::Dump $_[0]
+}
+=item my $guard = cf::guard { BLOCK }
+Run the given callback when the guard object gets destroyed (useful for
+coroutine cancellations).
+You can call C<< ->cancel >> on the guard object to stop the block from
+being executed.
+=cut
+sub guard(&) {
+   bless \(my $cb = $_[0]), cf::guard::;
+}
+sub cf::guard::cancel {
+   ${$_[0]} = sub { };
+}
+sub cf::guard::DESTROY {
+   ${$_[0]}->();
+}
+=item cf::lock_wait $string
+Wait until the given lock is available. See cf::lock_acquire.
+=item my $lock = cf::lock_acquire $string
+Wait until the given lock is available and then acquires it and returns
+a guard object. If the guard object gets destroyed (goes out of scope,
+for example when the coroutine gets canceled), the lock is automatically
+returned.
+Lock names should begin with a unique identifier (for example, find_map
+uses map_find and load_map uses map_load).
+=cut
+our %LOCK;
+sub lock_wait($) {
+   my ($key) = @_;
+   # wait for lock, if any
+   while ($LOCK{$key}) {
+      push @{ $LOCK{$key} }, $Coro::current;
+      Coro::schedule;
+   }
+}
+sub lock_acquire($) {
+   my ($key) = @_;
+   # wait, to be sure we are not locked
+   lock_wait $key;
+   $LOCK{$key} = [];
+   cf::guard {
+      # wake up all waiters, to be on the safe side
+      $_->ready for @{ delete $LOCK{$key} };
+   }
 }
 =item cf::sync_job { BLOCK }
 The design of crossfire+ requires that the main coro ($Coro::main) is
       (aio_load "$filename.pst", $av) >= 0
          or return;
       $av = eval { (Storable::thaw $av)->{objs} };
    }
+   warn sprintf "loading %s (%d)\n",
+      $filename, length $data, scalar @{$av || []};#d#
    return ($data, $av);
 }
 #############################################################################
 # command handling &c
    #warn "find_map<$path,$origin>\n";#d#
    $path = new cf::path $path, $origin && $origin->path;
    my $key = $path->as_string;
+   cf::lock_wait "map_find:$key";
    $cf::MAP{$key} || do {
+      my $guard = cf::lock_acquire "map_find:$key";
       # do it the slow way
       my $map = try_load_header $path->save_path;
       if ($map) {
          # safety
          $map->instantiate;
          # per-player maps become, after loading, normal maps
          $map->per_player (0) if $path->{user_rel};
       }
+      #Coro::Timer::sleep 1;#d#
       $map->path ($key);
       $map->{path} = $path;
+      $map->{last_save} = $cf::RUNTIME;
       $map->last_access ($cf::RUNTIME);
       if ($map->should_reset) {
          $map->reset;
          $map = find_map $path;
 }
 sub load {
    my ($self) = @_;
+   my $path = $self->{path};
+   my $guard = cf::lock_acquire "map_load:" . $path->as_string;
    return if $self->in_memory != cf::MAP_SWAPPED;
    $self->in_memory (cf::MAP_LOADING);
-   my $path = $self->{path};
    $self->alloc;
    $self->load_objects ($self->{load_path}, 1)
       or return;
 }
 sub save {
    my ($self) = @_;
+   $self->{last_save} = $cf::RUNTIME;
+   return unless $self->dirty;
    my $save = $self->{path}->save_path; utf8::encode $save;
    my $uniq = $self->{path}->uniq_path; utf8::encode $uniq;
-   $self->{last_save} = $cf::RUNTIME;
-   return unless $self->dirty;
    $self->{load_path} = $save;
    return if $self->{deny_save};
       (ref $cf::CFG{"may_$access"}
          ? scalar grep $self->name eq $_, @{$cf::CFG{"may_$access"}}
          : $cf::CFG{"may_$access"})
 }
+=item $player_object->enter_link
+Freezes the player and moves him/her to a special map (C<{link}>).
+The player should be reaosnably safe there for short amounts of time. You
+I<MUST> call C<leave_link> as soon as possible, though.
+=item $player_object->leave_link ($map, $x, $y)
+Moves the player out of the specila link map onto the given map. If the
+map is not valid (or omitted), the player will be moved back to the
+location he/she was before the call to C<enter_link>, or, if that fails,
+to the emergency map position.
+Might block.
+=cut
 sub cf::object::player::enter_link {
    my ($self) = @_;
+   $self->deactivate_recursive;
    return if $self->map == $LINK_MAP;
-   $self->{_link_pos} = [$self->map->{path}, $self->x, $self->y]
+   $self->{_link_pos} ||= [$self->map->{path}, $self->x, $self->y]
       if $self->map;
    $self->enter_map ($LINK_MAP, 20, 20);
-   $self->deactivate_recursive;
 }
 sub cf::object::player::leave_link {
    my ($self, $map, $x, $y) = @_;
    my $link_pos = delete $self->{_link_pos};
    unless ($map) {
-      $self->message ("The exit is closed", cf::NDI_UNIQUE | cf::NDI_RED);
       # restore original map position
       ($map, $x, $y) = @{ $link_pos || [] };
       $map = cf::map::find_map $map;
       unless ($map) {
    $self->activate_recursive;
    $self->enter_map ($map, $x, $y);
 }
+cf::player->attach (
+   on_logout => sub {
+      my ($pl) = @_;
+      # abort map switching before logout
+      if ($pl->ob->{_link_pos}) {
+         cf::sync_job {
+            $pl->ob->leave_link
+         };
+      }
+   },
+   on_login => sub {
+      my ($pl) = @_;
+      # try to abort aborted map switching on player login :)
+      # should happen only on crashes
+      if ($pl->ob->{_link_pos}) {
+         $pl->ob->enter_link;
+         Coro::async {
+            # we need this sleep as the login has a concurrent enter_exit running
+            # and this sleep increases chances of the player not ending up in scorn
+            Coro::Timer::sleep 1;
+            $pl->ob->leave_link;
+         };
+      }
+   },
+);
-=item $player_object->goto_map ($map, $x, $y)
+=item $player_object->goto_map ($path, $x, $y)
 =cut
 sub cf::object::player::goto_map {
    my ($self, $path, $x, $y) = @_;
       $path = new cf::path $path;
       my $map = cf::map::find_map $path->as_string;
       $map = $map->customise_for ($self) if $map;
-      warn "entering ", $map->path, " at ($x, $y)\n"
+#      warn "entering ", $map->path, " at ($x, $y)\n"
-         if $map;
+#         if $map;
+      $map or $self->message ("The exit is closed", cf::NDI_UNIQUE | cf::NDI_RED);
       $self->leave_link ($map, $x, $y);
    })->prio (1);
 }
 }
 sub main {
    # we must not ever block the main coroutine
    local $Coro::idle = sub {
-      Carp::cluck "FATAL: Coro::idle was called, major BUG\n";#d#
+      Carp::cluck "FATAL: Coro::idle was called, major BUG, use cf::sync_job!\n";#d#
       (Coro::unblock_sub {
          Event::one_event;
       })->();
    };

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Comparing deliantra/server/lib/cf.pm (file contents): Revision 1.114 by root, Mon Jan 1 16:00:10 2007 UTC vs. Revision 1.120 by root, Tue Jan 2 11:08:36 2007 UTC

Diff Legend

Comparing deliantra/server/lib/cf.pm (file contents):
Revision 1.114 by root, Mon Jan 1 16:00:10 2007 UTC vs.
Revision 1.120 by root, Tue Jan 2 11:08:36 2007 UTC