server/ext/map-scheduler.ext

#! perl

# this extension swaps out maps and resets them, in essence managing
# the reset/swap policy of the server.

our $DEACTIVATE_TIMEOUT =   20; # number of seconds after which maps get deactivated to save cpu
our $SWAP_TIMEOUT       =   35; # number of seconds after which maps inactive get swapped out
our $SCHEDULE_INTERVAL  =    2; # time the map scheduler sleeps between runs
our $SAVE_TIMEOUT       =   20; # save maps every n seconds
our $SAVE_INTERVAL      =  0.1; # save at max. one map every $SAVE_INTERVAL

our $SCHEDULER = cf::coro {
   while () {
      Coro::Timer::sleep $SCHEDULE_INTERVAL;

      # this weird form of iteration over values is used because
      # the hash changes underneath us frequently, and for
      # keeps a direct reference to the value without (in 5.8 perls)
      # keeping a reference, so this is prone to crashes or worse.
      my @maps = keys %cf::MAP;
      for (@maps) {
         my $map = $cf::MAP{$_}
            or next;
         $map->valid or next;

         eval {
            # not yet, because maps might become visible to players nearby
            # we need to remove the map from %cf::MAP and all tiled map links
#         if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
#            $map->deactivate;
#            delete $map->{active};
#         }
            if ($map->should_reset) {
               $map->reset;
            } elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
               if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) {
                  $map->swap_out;
                  Coro::Timer::sleep $SAVE_INTERVAL;
               } elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
                  $map->save;
                  Coro::Timer::sleep $SAVE_INTERVAL;
               }
            }
         };
         warn $@ if $@;
         Coro::cede;
      };
   }
};

$SCHEDULER->prio (-2);

# map load prefetch
cf::map->attach (
   on_enter => sub {
      my ($map, $pl) = @_;

      # floodfill surrounging maps, asynchronously
   },
);

Revision:	1.11
Committed:	Thu Jan 4 16:19:32 2007 UTC (17 years, 4 months ago) by root
Branch:	MAIN
Changes since 1.10:	+9 -0 lines
Log Message:	- word of recall activated the player indirectly - implement maptile->xy_find and xy_load - separate find and load, even on C level - generate map_leave/enter and map_change events even for tiled map changes (experimental) - implement mainloop freezeing by start/stop, not skipping ticks - no map updates when player !active
#	User	Rev	Content
1	root	1.1	#! perl
2
3			# this extension swaps out maps and resets them, in essence managing
4			# the reset/swap policy of the server.
5
6	root	1.7	our $DEACTIVATE_TIMEOUT = 20; # number of seconds after which maps get deactivated to save cpu
7	root	1.10	our $SWAP_TIMEOUT = 35; # number of seconds after which maps inactive get swapped out
8	root	1.7	our $SCHEDULE_INTERVAL = 2; # time the map scheduler sleeps between runs
9	root	1.10	our $SAVE_TIMEOUT = 20; # save maps every n seconds
10			our $SAVE_INTERVAL = 0.1; # save at max. one map every $SAVE_INTERVAL
11	root	1.1
12			our $SCHEDULER = cf::coro {
13			while () {
14			Coro::Timer::sleep $SCHEDULE_INTERVAL;
15
16	root	1.9	# this weird form of iteration over values is used because
17			# the hash changes underneath us frequently, and for
18			# keeps a direct reference to the value without (in 5.8 perls)
19			# keeping a reference, so this is prone to crashes or worse.
20	root	1.8	my @maps = keys %cf::MAP;
21			for (@maps) {
22			my $map = $cf::MAP{$_}
23			or next;
24			$map->valid or next;
25	root	1.9
26	root	1.1	eval {
27			# not yet, because maps might become visible to players nearby
28	root	1.3	# we need to remove the map from %cf::MAP and all tiled map links
29	root	1.1	# if ($last_access + $DEACTIVATE_TIMEOUT <= $cf::RUNTIME) {
30			# $map->deactivate;
31			# delete $map->{active};
32			# }
33			if ($map->should_reset) {
34			$map->reset;
35	root	1.3	} elsif ($map->in_memory == cf::MAP_IN_MEMORY) {
36	root	1.6	if ($map->last_access + $SWAP_TIMEOUT <= $cf::RUNTIME && !$map->players) {
37	root	1.3	$map->swap_out;
38			Coro::Timer::sleep $SAVE_INTERVAL;
39			} elsif ($map->{last_save} + $SAVE_TIMEOUT <= $cf::RUNTIME) {
40			$map->save;
41			Coro::Timer::sleep $SAVE_INTERVAL;
42			}
43	root	1.1	}
44			};
45			warn $@ if $@;
46			Coro::cede;
47	root	1.8	};
48	root	1.1	}
49			};
50	root	1.5
51	root	1.1	$SCHEDULER->prio (-2);
52
53	root	1.11	# map load prefetch
54			cf::map->attach (
55			on_enter => sub {
56			my ($map, $pl) = @_;
57
58			# floodfill surrounging maps, asynchronously
59			},
60			);
61