Filename | /2home/ss5/perl5/perlbrew/perls/perl-5.12.3/lib/5.12.3/x86_64-linux/IO/Select.pm |
Statements | Executed 13 statements in 874µs |
Calls | P | F | Exclusive Time |
Inclusive Time |
Subroutine |
---|---|---|---|---|---|
1 | 1 | 1 | 13µs | 17µs | BEGIN@9 | IO::Select::
1 | 1 | 1 | 9µs | 79µs | BEGIN@10 | IO::Select::
1 | 1 | 1 | 8µs | 45µs | BEGIN@11 | IO::Select::
0 | 0 | 0 | 0s | 0s | _fileno | IO::Select::
0 | 0 | 0 | 0s | 0s | _max | IO::Select::
0 | 0 | 0 | 0s | 0s | _update | IO::Select::
0 | 0 | 0 | 0s | 0s | add | IO::Select::
0 | 0 | 0 | 0s | 0s | as_string | IO::Select::
0 | 0 | 0 | 0s | 0s | bits | IO::Select::
0 | 0 | 0 | 0s | 0s | can_read | IO::Select::
0 | 0 | 0 | 0s | 0s | can_write | IO::Select::
0 | 0 | 0 | 0s | 0s | count | IO::Select::
0 | 0 | 0 | 0s | 0s | exists | IO::Select::
0 | 0 | 0 | 0s | 0s | handles | IO::Select::
0 | 0 | 0 | 0s | 0s | has_error | IO::Select::
0 | 0 | 0 | 0s | 0s | has_exception | IO::Select::
0 | 0 | 0 | 0s | 0s | new | IO::Select::
0 | 0 | 0 | 0s | 0s | remove | IO::Select::
0 | 0 | 0 | 0s | 0s | select | IO::Select::
Line | State ments |
Time on line |
Calls | Time in subs |
Code |
---|---|---|---|---|---|
1 | # IO::Select.pm | ||||
2 | # | ||||
3 | # Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights reserved. | ||||
4 | # This program is free software; you can redistribute it and/or | ||||
5 | # modify it under the same terms as Perl itself. | ||||
6 | |||||
7 | package IO::Select; | ||||
8 | |||||
9 | 3 | 19µs | 2 | 21µs | # spent 17µs (13+4) within IO::Select::BEGIN@9 which was called:
# once (13µs+4µs) by Net::SSH::BEGIN@8 at line 9 # spent 17µs making 1 call to IO::Select::BEGIN@9
# spent 4µs making 1 call to strict::import |
10 | 3 | 22µs | 2 | 149µs | # spent 79µs (9+70) within IO::Select::BEGIN@10 which was called:
# once (9µs+70µs) by Net::SSH::BEGIN@8 at line 10 # spent 79µs making 1 call to IO::Select::BEGIN@10
# spent 70µs making 1 call to warnings::register::import |
11 | 3 | 823µs | 2 | 83µs | # spent 45µs (8+38) within IO::Select::BEGIN@11 which was called:
# once (8µs+38µs) by Net::SSH::BEGIN@8 at line 11 # spent 45µs making 1 call to IO::Select::BEGIN@11
# spent 38µs making 1 call to vars::import |
12 | 1 | 500ns | require Exporter; | ||
13 | |||||
14 | 1 | 400ns | $VERSION = "1.17"; | ||
15 | |||||
16 | 1 | 6µs | @ISA = qw(Exporter); # This is only so we can do version checking | ||
17 | |||||
18 | sub VEC_BITS () {0} | ||||
19 | sub FD_COUNT () {1} | ||||
20 | sub FIRST_FD () {2} | ||||
21 | |||||
22 | sub new | ||||
23 | { | ||||
24 | my $self = shift; | ||||
25 | my $type = ref($self) || $self; | ||||
26 | |||||
27 | my $vec = bless [undef,0], $type; | ||||
28 | |||||
29 | $vec->add(@_) | ||||
30 | if @_; | ||||
31 | |||||
32 | $vec; | ||||
33 | } | ||||
34 | |||||
35 | sub add | ||||
36 | { | ||||
37 | shift->_update('add', @_); | ||||
38 | } | ||||
39 | |||||
40 | |||||
41 | sub remove | ||||
42 | { | ||||
43 | shift->_update('remove', @_); | ||||
44 | } | ||||
45 | |||||
46 | |||||
47 | sub exists | ||||
48 | { | ||||
49 | my $vec = shift; | ||||
50 | my $fno = $vec->_fileno(shift); | ||||
51 | return undef unless defined $fno; | ||||
52 | $vec->[$fno + FIRST_FD]; | ||||
53 | } | ||||
54 | |||||
55 | |||||
56 | sub _fileno | ||||
57 | { | ||||
58 | my($self, $f) = @_; | ||||
59 | return unless defined $f; | ||||
60 | $f = $f->[0] if ref($f) eq 'ARRAY'; | ||||
61 | ($f =~ /^\d+$/) ? $f : fileno($f); | ||||
62 | } | ||||
63 | |||||
64 | sub _update | ||||
65 | { | ||||
66 | my $vec = shift; | ||||
67 | my $add = shift eq 'add'; | ||||
68 | |||||
69 | my $bits = $vec->[VEC_BITS]; | ||||
70 | $bits = '' unless defined $bits; | ||||
71 | |||||
72 | my $count = 0; | ||||
73 | my $f; | ||||
74 | foreach $f (@_) | ||||
75 | { | ||||
76 | my $fn = $vec->_fileno($f); | ||||
77 | next unless defined $fn; | ||||
78 | my $i = $fn + FIRST_FD; | ||||
79 | if ($add) { | ||||
80 | if (defined $vec->[$i]) { | ||||
81 | $vec->[$i] = $f; # if array rest might be different, so we update | ||||
82 | next; | ||||
83 | } | ||||
84 | $vec->[FD_COUNT]++; | ||||
85 | vec($bits, $fn, 1) = 1; | ||||
86 | $vec->[$i] = $f; | ||||
87 | } else { # remove | ||||
88 | next unless defined $vec->[$i]; | ||||
89 | $vec->[FD_COUNT]--; | ||||
90 | vec($bits, $fn, 1) = 0; | ||||
91 | $vec->[$i] = undef; | ||||
92 | } | ||||
93 | $count++; | ||||
94 | } | ||||
95 | $vec->[VEC_BITS] = $vec->[FD_COUNT] ? $bits : undef; | ||||
96 | $count; | ||||
97 | } | ||||
98 | |||||
99 | sub can_read | ||||
100 | { | ||||
101 | my $vec = shift; | ||||
102 | my $timeout = shift; | ||||
103 | my $r = $vec->[VEC_BITS]; | ||||
104 | |||||
105 | defined($r) && (select($r,undef,undef,$timeout) > 0) | ||||
106 | ? handles($vec, $r) | ||||
107 | : (); | ||||
108 | } | ||||
109 | |||||
110 | sub can_write | ||||
111 | { | ||||
112 | my $vec = shift; | ||||
113 | my $timeout = shift; | ||||
114 | my $w = $vec->[VEC_BITS]; | ||||
115 | |||||
116 | defined($w) && (select(undef,$w,undef,$timeout) > 0) | ||||
117 | ? handles($vec, $w) | ||||
118 | : (); | ||||
119 | } | ||||
120 | |||||
121 | sub has_exception | ||||
122 | { | ||||
123 | my $vec = shift; | ||||
124 | my $timeout = shift; | ||||
125 | my $e = $vec->[VEC_BITS]; | ||||
126 | |||||
127 | defined($e) && (select(undef,undef,$e,$timeout) > 0) | ||||
128 | ? handles($vec, $e) | ||||
129 | : (); | ||||
130 | } | ||||
131 | |||||
132 | sub has_error | ||||
133 | { | ||||
134 | warnings::warn("Call to deprecated method 'has_error', use 'has_exception'") | ||||
135 | if warnings::enabled(); | ||||
136 | goto &has_exception; | ||||
137 | } | ||||
138 | |||||
139 | sub count | ||||
140 | { | ||||
141 | my $vec = shift; | ||||
142 | $vec->[FD_COUNT]; | ||||
143 | } | ||||
144 | |||||
145 | sub bits | ||||
146 | { | ||||
147 | my $vec = shift; | ||||
148 | $vec->[VEC_BITS]; | ||||
149 | } | ||||
150 | |||||
151 | sub as_string # for debugging | ||||
152 | { | ||||
153 | my $vec = shift; | ||||
154 | my $str = ref($vec) . ": "; | ||||
155 | my $bits = $vec->bits; | ||||
156 | my $count = $vec->count; | ||||
157 | $str .= defined($bits) ? unpack("b*", $bits) : "undef"; | ||||
158 | $str .= " $count"; | ||||
159 | my @handles = @$vec; | ||||
160 | splice(@handles, 0, FIRST_FD); | ||||
161 | for (@handles) { | ||||
162 | $str .= " " . (defined($_) ? "$_" : "-"); | ||||
163 | } | ||||
164 | $str; | ||||
165 | } | ||||
166 | |||||
167 | sub _max | ||||
168 | { | ||||
169 | my($a,$b,$c) = @_; | ||||
170 | $a > $b | ||||
171 | ? $a > $c | ||||
172 | ? $a | ||||
173 | : $c | ||||
174 | : $b > $c | ||||
175 | ? $b | ||||
176 | : $c; | ||||
177 | } | ||||
178 | |||||
179 | sub select | ||||
180 | { | ||||
181 | shift | ||||
182 | if defined $_[0] && !ref($_[0]); | ||||
183 | |||||
184 | my($r,$w,$e,$t) = @_; | ||||
185 | my @result = (); | ||||
186 | |||||
187 | my $rb = defined $r ? $r->[VEC_BITS] : undef; | ||||
188 | my $wb = defined $w ? $w->[VEC_BITS] : undef; | ||||
189 | my $eb = defined $e ? $e->[VEC_BITS] : undef; | ||||
190 | |||||
191 | if(select($rb,$wb,$eb,$t) > 0) | ||||
192 | { | ||||
193 | my @r = (); | ||||
194 | my @w = (); | ||||
195 | my @e = (); | ||||
196 | my $i = _max(defined $r ? scalar(@$r)-1 : 0, | ||||
197 | defined $w ? scalar(@$w)-1 : 0, | ||||
198 | defined $e ? scalar(@$e)-1 : 0); | ||||
199 | |||||
200 | for( ; $i >= FIRST_FD ; $i--) | ||||
201 | { | ||||
202 | my $j = $i - FIRST_FD; | ||||
203 | push(@r, $r->[$i]) | ||||
204 | if defined $rb && defined $r->[$i] && vec($rb, $j, 1); | ||||
205 | push(@w, $w->[$i]) | ||||
206 | if defined $wb && defined $w->[$i] && vec($wb, $j, 1); | ||||
207 | push(@e, $e->[$i]) | ||||
208 | if defined $eb && defined $e->[$i] && vec($eb, $j, 1); | ||||
209 | } | ||||
210 | |||||
211 | @result = (\@r, \@w, \@e); | ||||
212 | } | ||||
213 | @result; | ||||
214 | } | ||||
215 | |||||
216 | |||||
217 | sub handles | ||||
218 | { | ||||
219 | my $vec = shift; | ||||
220 | my $bits = shift; | ||||
221 | my @h = (); | ||||
222 | my $i; | ||||
223 | my $max = scalar(@$vec) - 1; | ||||
224 | |||||
225 | for ($i = FIRST_FD; $i <= $max; $i++) | ||||
226 | { | ||||
227 | next unless defined $vec->[$i]; | ||||
228 | push(@h, $vec->[$i]) | ||||
229 | if !defined($bits) || vec($bits, $i - FIRST_FD, 1); | ||||
230 | } | ||||
231 | |||||
232 | @h; | ||||
233 | } | ||||
234 | |||||
235 | 1 | 3µs | 1; | ||
236 | __END__ |