Revision: | 1.5 |
Committed: | Thu Nov 21 09:52:34 2002 UTC (21 years, 8 months ago) by root |
Content type: | text/plain |
Branch: | MAIN |
CVS Tags: | rel-2_5, rel-4_22, rel-4_21, rel-4_0, rel-4_3, rel-3_41, rel-4_13, rel-4_11, rel-3_55, rel-3_51, rel-4_01, rel-4_03, rel-4_02, rel-2_0, rel-2_1, rel-1_1, rel-1_0, rel-1_9, rel-1_2, rel-3_6, rel-3_62, rel-3_63, rel-3_61, rel-1_5, rel-1_4, rel-1_7, rel-1_6, rel-3_4, rel-3_1, rel-3_5, rel-3_3, rel-3_2, rel-3_0, rel-3_01, rel-3_11, rel-1_31, rel-4_1, rel-4_2, stack_sharing, rel-3_501, rel-4_31 |
Changes since 1.4: | +1 -1 lines |
Log Message: | config.pl.dist |
# | User | Rev | Content |
---|---|---|---|
1 | root | 1.1 | package tbf; |
2 | |||
3 | # kind of token-bucket-filter | ||
4 | |||
5 | root | 1.5 | my $max_per_client = $::TBF_MAX_PER_CLIENT || 24000; |
6 | root | 1.1 | |
7 | sub new { | ||
8 | my $class = shift; | ||
9 | my %arg = @_; | ||
10 | my $self = bless \%arg, $class; | ||
11 | |||
12 | $self->{maxbucket} ||= $self->{rate} * 3; # max 3s bucket | ||
13 | $self->{minbucket} ||= $self->{rate}; # minimum bucket to share | ||
14 | $self->{interval} ||= $::BUFSIZE / $max_per_client; # good default interval | ||
15 | |||
16 | if ($self->{rate}) { | ||
17 | $self->{w} = Event->timer(hard => 1, after => 0, interval => $self->{interval}, repeat => 1, cb => sub { | ||
18 | $self->inject($self->{rate} * $self->{interval}); | ||
19 | }); | ||
20 | } else { | ||
21 | die "chaining not yet implemented\n"; | ||
22 | } | ||
23 | |||
24 | $self; | ||
25 | } | ||
26 | |||
27 | sub DESTROY { | ||
28 | my $self = shift; | ||
29 | |||
30 | $self->{w}->cancel; | ||
31 | } | ||
32 | |||
33 | sub inject { | ||
34 | my ($self, $bytes) = @_; | ||
35 | |||
36 | $self->{bucket} += $bytes; | ||
37 | |||
38 | while ($self->{bucket} >= $self->{minbucket}) { | ||
39 | if ($self->{waitw}) { | ||
40 | my $rate = $self->{bucket} / $self->{waitw}; | ||
41 | |||
42 | for my $v (values %{$self->{waitq}}) { | ||
43 | $self->{bucket} -= $rate * $v->[0]; | ||
44 | $v->[1] += $rate * $v->[0]; | ||
45 | |||
46 | if ($v->[1] >= $v->[2]) { | ||
47 | $self->{bucket} += $v->[1] - $v->[2]; | ||
48 | $v->[3]->(); | ||
49 | } | ||
50 | } | ||
51 | |||
52 | } | ||
53 | root | 1.3 | last; |
54 | } | ||
55 | root | 1.1 | |
56 | root | 1.3 | if ($self->{maxbucket} < $self->{bucket}) { |
57 | ::unused_bandwidth ($self->{bucket} - $self->{maxbucket}); | ||
58 | $self->{bucket} = $self->{maxbucket}; | ||
59 | root | 1.1 | } |
60 | } | ||
61 | |||
62 | my $_tbf_id; | ||
63 | |||
64 | sub request { | ||
65 | my ($self, $bytes, $weight) = @_; | ||
66 | |||
67 | $weight ||= 1; | ||
68 | |||
69 | root | 1.2 | my $coro = $Coro::current; |
70 | my $id = $_tbf_id++; | ||
71 | |||
72 | $self->{waitw} += $weight; | ||
73 | $self->{waitq}{$id} = [$weight, 0, $bytes, sub { | ||
74 | delete $self->{waitq}{$id}; | ||
75 | $self->{waitw} -= $weight; | ||
76 | $coro->ready; | ||
77 | }]; | ||
78 | |||
79 | Coro::schedule; | ||
80 | root | 1.1 | } |
81 | |||
82 | 1; |