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Comparing Coro/Coro.pm (file contents):
Revision 1.21 by root, Sun Jul 22 03:24:10 2001 UTC vs.
Revision 1.23 by root, Mon Jul 23 04:23:32 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+ @_ + $_ + $@ + $^W + C stack), that is, a coroutine has it's own
30own set of lexicals and it's own set of perl's most important global 30callchain, it's own set of lexicals and it's own set of perl's most
31variables. 31important global variables.
32
33WARNING: When using this module, make sure that, at program end, no
34coroutines are still running OR just call exit before falling off the
35end. The reason for this is that some coroutine of yours might have called
36into a C function, and falling off the end of main:: results in returning
37to that C function instead if to the main C interpreter.
38 32
39=cut 33=cut
40 34
41package Coro; 35package Coro;
42 36
… …
44 38
45use base Exporter; 39use base Exporter;
46 40
47$VERSION = 0.10; 41$VERSION = 0.10;
48 42
49@EXPORT = qw(async yield schedule terminate current); 43@EXPORT = qw(async cede schedule terminate current);
50@EXPORT_OK = qw($current); 44@EXPORT_OK = qw($current);
51 45
52{ 46{
53 my @async; 47 my @async;
54 48
… …
158 # should be done using priorities :( 152 # should be done using priorities :(
159 ($prev, $current) = ($current, shift @ready || $idle); 153 ($prev, $current) = ($current, shift @ready || $idle);
160 Coro::State::transfer($prev, $current); 154 Coro::State::transfer($prev, $current);
161} 155}
162 156
163=item yield 157=item cede
164 158
165Yield to other processes. This function puts the current process into the 159"Cede" to other processes. This function puts the current process into the
166ready queue and calls C<schedule>. 160ready queue and calls C<schedule>, which has the effect of giving up the
161current "timeslice" to other coroutines of the same or higher priority.
167 162
168=cut 163=cut
169 164
170sub yield { 165sub cede {
171 $current->ready; 166 $current->ready;
172 &schedule; 167 &schedule;
173} 168}
174 169
175=item terminate 170=item terminate
… …
178 173
179Future versions of this function will allow result arguments. 174Future versions of this function will allow result arguments.
180 175
181=cut 176=cut
182 177
178# this coroutine is necessary because a coroutine
179# cannot destroy itself.
180my @destroy;
181my $terminate = new Coro sub {
182 while() {
183 delete ((pop @destroy)->{_coro_state}) while @destroy;
184 &schedule;
185 }
186};
187
183sub terminate { 188sub terminate {
184 $current->{_results} = [@_]; 189 push @destroy, $current;
185 delete $current->{_coro_state}; 190 $terminate->ready;
186 &schedule; 191 &schedule;
192 # NORETURN
187} 193}
188 194
189=back 195=back
190 196
191# dynamic methods 197# dynamic methods

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