annotate Lib/IMPL/Profiler/Memory.pm @ 215:77a9934a44af

sync, migrating to XML::Compile
author cin
date Sun, 19 Aug 2012 22:27:43 +0400
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1 package IMPL::Profiler::Memory;
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2
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3 use strict;
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4 use Carp qw(longmess shortmess);
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5 use Scalar::Util qw(refaddr weaken isweak);
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6
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7 my %listeners;
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8 my $trapped;
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9
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10 BEGIN {
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11 $trapped = 0;
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12 }
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13
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14 sub import {
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15 if (not $trapped) {
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16 *CORE::GLOBAL::bless = sub {
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17 $_[1] |= caller unless $_[1];
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18 my $ref = CORE::bless $_[0],$_[1];
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19
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20 $_->track($ref) foreach values %listeners;
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21
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22 return $ref;
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23 };
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24 $trapped = 1;
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25 }
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26 }
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27
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28 sub _ConnectListener {
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29 my ($self,$listener) = @_;
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30
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31 die "Invalid listener" unless ref $listener;
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32
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33 $listeners{refaddr($listener)} = $listener;
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34 }
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35
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36 sub _RemoveListener {
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37 my ($self,$listener) = @_;
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38
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39 die "Invalid listener" unless ref $listener;
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40
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41 delete $listeners{refaddr($listener)};
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42 }
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43
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44 sub Monitor {
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45 my ($self,$code) = @_;
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46
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47 my $data = IMPL::Profiler::Memory::Data->new();
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48
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49 $data->Monitor($code);
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50
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51 return $data;
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52 }
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53
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54 package IMPL::Profiler::Memory::Data;
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55 use parent qw(IMPL::Object::Fields);
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56
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57 use Data::Dumper();
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58 use Scalar::Util qw(refaddr weaken isweak);
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59
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60 use fields qw( objects counter);
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61
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62 sub CTOR {
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63 my $this = shift;
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64 $this->{objects} = [];
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65 $this->{counter} = 0;
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66 }
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67
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68 sub track {
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69 my $i = scalar @{$_[0]->{objects}};
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70 $_[0]->{objects}[$i] = $_[1];
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71 weaken($_[0]->{objects}[$i]);
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72 $_[0]->{counter} ++;
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73 }
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74
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75 sub Purge {
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76 my $this = shift;
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77
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78 return $this->{objects} = [ grep defined($_), @{$this->{objects}}];
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79 }
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80
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81 sub Dump {
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82 my $this = shift;
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83 return Data::Dumper->Dump([$this->{objects}]);
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84 }
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85
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86 sub isLeak {
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87 my ($this) = @_;
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88 $this->Purge();
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89 return ( scalar(@{$this->{objects}}) > 0);
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90 }
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91
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92 sub Monitor {
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93 my ($this,$code) = @_;
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94
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95 die "A reference to a subroutine is required" unless ref $code;
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96
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97 IMPL::Profiler::Memory->_ConnectListener($this);
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98 eval {
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99 $code->();
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100 };
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101 my $err = $@;
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102 IMPL::Profiler::Memory->_RemoveListener($this);
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103
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104 die $err if $err;
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105
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106 return;
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107 }
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108
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110
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111 1;