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Comparing Coro/Coro.pm (file contents):
Revision 1.20 by root, Sat Jul 21 18:21:45 2001 UTC vs.
Revision 1.24 by root, Wed Jul 25 04:14:37 2001 UTC

… …
14 14
15 sub some_func : Coro { 15 sub some_func : Coro {
16 # some more async code 16 # some more async code
17 } 17 }
18 18
19 yield; 19 cede;
20 20
21=head1 DESCRIPTION 21=head1 DESCRIPTION
22 22
23This module collection manages coroutines. Coroutines are similar to 23This module collection manages coroutines. Coroutines are similar to
24Threads but don't run in parallel. 24Threads but don't run in parallel.
25 25
26This module is still experimental, see the BUGS section below. 26This module is still experimental, see the BUGS section below.
27 27
28In this module, coroutines are defined as "callchain + lexical variables 28In this module, coroutines are defined as "callchain + lexical variables
29+ @_ + $_ + $@ + $^W), that is, a coroutine has it's own callchain, it's 29+ @_ + $_ + $@ + $^W + C stack), that is, a coroutine has it's own
30own set of lexicals and it's own set of perl's most important global 30callchain, it's own set of lexicals and it's own set of perl's most
31variables. 31important global variables.
32 32
33=cut 33=cut
34 34
35package Coro; 35package Coro;
36 36
37use Coro::State; 37use Coro::State;
38 38
39use base Exporter; 39use base Exporter;
40 40
41$VERSION = 0.10; 41$VERSION = 0.12;
42 42
43@EXPORT = qw(async yield schedule terminate current); 43@EXPORT = qw(async cede schedule terminate current);
44@EXPORT_OK = qw($current); 44@EXPORT_OK = qw($current);
45 45
46{ 46{
47 my @async; 47 my @async;
48 48
… …
103our $idle = new Coro sub { 103our $idle = new Coro sub {
104 print STDERR "FATAL: deadlock detected\n"; 104 print STDERR "FATAL: deadlock detected\n";
105 exit(51); 105 exit(51);
106}; 106};
107 107
108# this coroutine is necessary because a coroutine
109# cannot destroy itself.
110my @destroy;
111my $manager = new Coro sub {
112 while() {
113 delete ((pop @destroy)->{_coro_state}) while @destroy;
114 &schedule;
115 }
116};
117
108# we really need priorities... 118# we really need priorities...
109my @ready; # the ready queue. hehe, rather broken ;) 119my @ready; # the ready queue. hehe, rather broken ;)
110 120
111# static methods. not really. 121# static methods. not really.
112 122
… …
132 142
133=cut 143=cut
134 144
135sub async(&@) { 145sub async(&@) {
136 my $pid = new Coro @_; 146 my $pid = new Coro @_;
147 $manager->ready; # this ensures that the stack is cloned from the manager
137 $pid->ready; 148 $pid->ready;
138 $pid; 149 $pid;
139} 150}
140 151
141=item schedule 152=item schedule
… …
152 # should be done using priorities :( 163 # should be done using priorities :(
153 ($prev, $current) = ($current, shift @ready || $idle); 164 ($prev, $current) = ($current, shift @ready || $idle);
154 Coro::State::transfer($prev, $current); 165 Coro::State::transfer($prev, $current);
155} 166}
156 167
157=item yield 168=item cede
158 169
159Yield to other processes. This function puts the current process into the 170"Cede" to other processes. This function puts the current process into the
160ready queue and calls C<schedule>. 171ready queue and calls C<schedule>, which has the effect of giving up the
172current "timeslice" to other coroutines of the same or higher priority.
161 173
162=cut 174=cut
163 175
164sub yield { 176sub cede {
165 $current->ready; 177 $current->ready;
166 &schedule; 178 &schedule;
167} 179}
168 180
169=item terminate 181=item terminate
… …
173Future versions of this function will allow result arguments. 185Future versions of this function will allow result arguments.
174 186
175=cut 187=cut
176 188
177sub terminate { 189sub terminate {
178 $current->{_results} = [@_]; 190 push @destroy, $current;
191 $manager->ready;
179 &schedule; 192 &schedule;
193 # NORETURN
180} 194}
181 195
182=back 196=back
183 197
184# dynamic methods 198# dynamic methods

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