| 1 | package transferqueue; |
1 | package transferqueue; |
| 2 | |
2 | |
| 3 | sub new { |
3 | sub new { |
| 4 | my $class = shift; |
4 | my $class = shift; |
| 5 | bless { |
5 | bless { |
| 6 | conns => $_[0], |
6 | slots => $_[0], |
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7 | lastspb => 0, |
| 7 | }, $class; |
8 | }, $class; |
| 8 | } |
9 | } |
| 9 | |
10 | |
| 10 | sub start_transfer { |
11 | sub start_transfer { |
| 11 | my $self = shift; |
12 | my $self = shift; |
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|
13 | my $size = $_[0]; |
| 12 | |
14 | |
| 13 | my $trans = bless [ $self ], transfer::; |
15 | my $trans = bless { |
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16 | queue => $self, |
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17 | time => $::NOW, |
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18 | size => $size, |
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19 | coro => $Coro::current, |
|
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20 | }, transfer::; |
| 14 | |
21 | |
| 15 | push @{$self->{wait}}, $trans; |
22 | push @{$self->{wait}}, $trans; |
| 16 | Scalar::Util::weaken($self->{wait}[-1]); |
23 | Scalar::Util::weaken($self->{wait}[-1]); |
| 17 | |
24 | |
| 18 | if (--$self->{conns} >= 0) { |
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| 19 | $self->wake_next; |
25 | $self->wake_next; |
| 20 | } |
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| 21 | |
26 | |
| 22 | $trans; |
27 | $trans; |
| 23 | } |
28 | } |
| 24 | |
29 | |
| 25 | sub wake_next { |
30 | sub wake_next { |
| 26 | my $self = shift; |
31 | my $self = shift; |
| 27 | |
32 | |
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33 | $self->sort; |
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34 | |
| 28 | while(@{$self->{wait}}) { |
35 | while($self->{slots} && @{$self->{wait}}) { |
| 29 | my $transfer = shift @{$self->{wait}}; |
36 | my $transfer = shift @{$self->{wait}}; |
| 30 | if ($transfer) { |
37 | if ($transfer) { |
|
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38 | $self->{lastspb} = $transfer->{spb}; |
| 31 | $transfer->wake; |
39 | $transfer->wake; |
| 32 | last; |
40 | last; |
| 33 | } |
41 | } |
| 34 | } |
42 | } |
| 35 | } |
43 | } |
| 36 | |
44 | |
|
|
45 | sub sort { |
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46 | $_[0]{wait} = [ |
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47 | sort { $b->{spb} <=> $a->{spb} } |
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48 | grep { $_ && ($_->{spb} = ($::NOW-$_->{time})/($_->{size}||1)), $_ } |
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49 | @{$_[0]{wait}} |
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50 | ]; |
|
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51 | } |
|
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52 | |
| 37 | sub waiters { |
53 | sub waiters { |
| 38 | map $_->[1], @{$_[0]{wait}}; |
54 | $_[0]->sort; |
|
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55 | @{$_[0]{wait}}; |
| 39 | } |
56 | } |
| 40 | |
57 | |
| 41 | package transfer; |
58 | package transfer; |
| 42 | |
59 | |
| 43 | use Coro::Timer (); |
60 | use Coro::Timer (); |
| 44 | |
61 | |
| 45 | sub wake { |
62 | sub wake { |
| 46 | my $self = shift; |
63 | my $self = shift; |
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64 | |
| 47 | $self->[2] = 1; |
65 | $self->{alloc} = 1; |
| 48 | ref $self->[1] and $self->[1]->ready; |
66 | $self->{queue}{slots}--; |
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67 | $self->{wake} and $self->{wake}->ready; |
| 49 | } |
68 | } |
| 50 | |
69 | |
| 51 | sub try { |
70 | sub try { |
| 52 | my $self = shift; |
71 | my $self = shift; |
| 53 | |
72 | |
| 54 | unless ($self->[2]) { |
73 | $self->{alloc} || do { |
| 55 | my $timeout = Coro::Timer::timeout $_[0]; |
74 | my $timeout = Coro::Timer::timeout $_[0]; |
| 56 | local $self->[1] = $Coro::current; |
75 | local $self->{wake} = $self->{coro}; |
| 57 | |
76 | |
| 58 | Coro::schedule; |
77 | Coro::schedule; |
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78 | |
|
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79 | $self->{alloc}; |
| 59 | } |
80 | } |
| 60 | |
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| 61 | return $self->[2]; |
|
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| 62 | } |
81 | } |
| 63 | |
82 | |
| 64 | sub DESTROY { |
83 | sub DESTROY { |
| 65 | my $self = shift; |
84 | my $self = shift; |
| 66 | $self->[0]{conns}++; |
85 | |
| 67 | $self->[0]->wake_next if $self->[2]; |
86 | if ($self->{alloc}) { |
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87 | $self->{queue}{slots}++; |
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88 | $self->{queue}->wake_next; |
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89 | } |
| 68 | } |
90 | } |
| 69 | |
91 | |
| 70 | package conn; |
92 | package conn; |
| 71 | |
93 | |
| 72 | our %blockuri; |
94 | our %blockuri; |
