| 1 |
#! perl |
| 2 |
|
| 3 |
# this plug-in prefetches maps. everytime a player enters a map, |
| 4 |
# it will asynchronously prefetch files from disk (it will not load them |
| 5 |
# into the server, but into the OS cache only). |
| 6 |
|
| 7 |
use Errno (); |
| 8 |
use Time::HiRes; |
| 9 |
use Fcntl; |
| 10 |
use IO::AIO; |
| 11 |
|
| 12 |
sub find_exits { |
| 13 |
my ($map) = @_; |
| 14 |
|
| 15 |
my %exit; |
| 16 |
|
| 17 |
for my $x (0 .. $map->width - 1) { |
| 18 |
for my $y (0 .. $map->height - 1) { |
| 19 |
for (grep $_->type == 66, $map->at ($x, $y)) { |
| 20 |
my $path = $_->slaying; |
| 21 |
|
| 22 |
next if 3 > length $path; |
| 23 |
|
| 24 |
$path = cf::maps_directory cf::path_combine_and_normalize $map->path, $path; |
| 25 |
|
| 26 |
$exit{$path}++; |
| 27 |
} |
| 28 |
} |
| 29 |
} |
| 30 |
|
| 31 |
[keys %exit] |
| 32 |
} |
| 33 |
|
| 34 |
my %MAP_EXITS; |
| 35 |
my %MAP_TIMEOUT; |
| 36 |
|
| 37 |
sub on_mapenter { |
| 38 |
my ($ob) = @_; |
| 39 |
|
| 40 |
my $exit = $MAP_EXITS{$ob->map->path} ||= find_exits $ob->map; |
| 41 |
|
| 42 |
my $NOW = Time::HiRes::time; |
| 43 |
|
| 44 |
for my $path (@$exit) { |
| 45 |
next if $MAP_TIMEOUT{$path} > $NOW; |
| 46 |
|
| 47 |
if (my $map = cf::map::has_been_loaded $path) { |
| 48 |
next if $map->in_memory == cf::MAP_IN_MEMORY; |
| 49 |
|
| 50 |
$path = $map->tmppath if $map->in_memory == cf::MAP_SWAPPED; |
| 51 |
} |
| 52 |
|
| 53 |
$MAP_TIMEOUT{$path} = $NOW + 60 + rand 60; |
| 54 |
|
| 55 |
aio_open $path, O_RDONLY, 0, sub { |
| 56 |
my ($fh) = @_ |
| 57 |
or return; |
| 58 |
aio_readahead $fh, 0, -s $fh, sub { |
| 59 |
my $stop = Time::HiRes::time; |
| 60 |
warn "$path ", $stop-$NOW; |
| 61 |
}; |
| 62 |
}; |
| 63 |
} |
| 64 |
} |
| 65 |
|
| 66 |
sub on_clock { |
| 67 |
# boy how I hate polling |
| 68 |
IO::AIO::poll_cb; |
| 69 |
} |
| 70 |
|
| 71 |
|
