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Comparing cvsroot/Coro/Coro.pm (file contents):
Revision 1.23 by root, Mon Jul 23 04:23:32 2001 UTC vs.
Revision 1.30 by root, Sat Aug 11 19:59:19 2001 UTC

… …
36 36
37use Coro::State; 37use Coro::State;
38 38
39use base Exporter; 39use base Exporter;
40 40
41$VERSION = 0.10; 41$VERSION = 0.45;
42 42
43@EXPORT = qw(async cede 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 my $init;
48 49
49 # this way of handling attributes simply is NOT scalable ;() 50 # this way of handling attributes simply is NOT scalable ;()
50 sub import { 51 sub import {
51 Coro->export_to_level(1, @_); 52 Coro->export_to_level(1, @_);
52 my $old = *{(caller)[0]."::MODIFY_CODE_ATTRIBUTES"}{CODE}; 53 my $old = *{(caller)[0]."::MODIFY_CODE_ATTRIBUTES"}{CODE};
… …
54 my ($package, $ref) = (shift, shift); 55 my ($package, $ref) = (shift, shift);
55 my @attrs; 56 my @attrs;
56 for (@_) { 57 for (@_) {
57 if ($_ eq "Coro") { 58 if ($_ eq "Coro") {
58 push @async, $ref; 59 push @async, $ref;
60 unless ($init++) {
61 eval q{
62 sub INIT {
63 &async(pop @async) while @async;
64 }
65 };
66 }
59 } else { 67 } else {
60 push @attrs, $_; 68 push @attrs, $_;
61 } 69 }
62 } 70 }
63 return $old ? $old->($package, $ref, @attrs) : @attrs; 71 return $old ? $old->($package, $ref, @attrs) : @attrs;
64 }; 72 };
65 } 73 }
66 74
67 sub INIT {
68 &async(pop @async) while @async;
69 }
70} 75}
71 76
72=item $main 77=item $main
73 78
74This coroutine represents the main program. 79This coroutine represents the main program.
… …
103our $idle = new Coro sub { 108our $idle = new Coro sub {
104 print STDERR "FATAL: deadlock detected\n"; 109 print STDERR "FATAL: deadlock detected\n";
105 exit(51); 110 exit(51);
106}; 111};
107 112
108# we really need priorities...
109my @ready; # the ready queue. hehe, rather broken ;)
110
111# static methods. not really.
112
113=head2 STATIC METHODS
114
115Static methods are actually functions that operate on the current process only.
116
117=over 4
118
119=item async { ... } [@args...]
120
121Create a new asynchronous process and return it's process object
122(usually unused). When the sub returns the new process is automatically
123terminated.
124
125 # create a new coroutine that just prints its arguments
126 async {
127 print "@_\n";
128 } 1,2,3,4;
129
130The coderef you submit MUST NOT be a closure that refers to variables
131in an outer scope. This does NOT work. Pass arguments into it instead.
132
133=cut
134
135sub async(&@) {
136 my $pid = new Coro @_;
137 $pid->ready;
138 $pid;
139}
140
141=item schedule
142
143Calls the scheduler. Please note that the current process will not be put
144into the ready queue, so calling this function usually means you will
145never be called again.
146
147=cut
148
149my $prev;
150
151sub schedule {
152 # should be done using priorities :(
153 ($prev, $current) = ($current, shift @ready || $idle);
154 Coro::State::transfer($prev, $current);
155}
156
157=item cede
158
159"Cede" to other processes. This function puts the current process into the
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.
162
163=cut
164
165sub cede {
166 $current->ready;
167 &schedule;
168}
169
170=item terminate
171
172Terminates the current process.
173
174Future versions of this function will allow result arguments.
175
176=cut
177
178# this coroutine is necessary because a coroutine 113# this coroutine is necessary because a coroutine
179# cannot destroy itself. 114# cannot destroy itself.
180my @destroy; 115my @destroy;
181my $terminate = new Coro sub { 116my $manager = new Coro sub {
182 while() { 117 while() {
183 delete ((pop @destroy)->{_coro_state}) while @destroy; 118 delete ((pop @destroy)->{_coro_state}) while @destroy;
184 &schedule; 119 &schedule;
185 } 120 }
186}; 121};
187 122
123# static methods. not really.
124
125=head2 STATIC METHODS
126
127Static methods are actually functions that operate on the current process only.
128
129=over 4
130
131=item async { ... } [@args...]
132
133Create a new asynchronous process and return it's process object
134(usually unused). When the sub returns the new process is automatically
135terminated.
136
137 # create a new coroutine that just prints its arguments
138 async {
139 print "@_\n";
140 } 1,2,3,4;
141
142The coderef you submit MUST NOT be a closure that refers to variables
143in an outer scope. This does NOT work. Pass arguments into it instead.
144
145=cut
146
147sub async(&@) {
148 my $pid = new Coro @_;
149 $manager->ready; # this ensures that the stack is cloned from the manager
150 $pid->ready;
151 $pid;
152}
153
154=item schedule
155
156Calls the scheduler. Please note that the current process will not be put
157into the ready queue, so calling this function usually means you will
158never be called again.
159
160=cut
161
162=item cede
163
164"Cede" to other processes. This function puts the current process into the
165ready queue and calls C<schedule>, which has the effect of giving up the
166current "timeslice" to other coroutines of the same or higher priority.
167
168=cut
169
170=item terminate
171
172Terminates the current process.
173
174Future versions of this function will allow result arguments.
175
176=cut
177
188sub terminate { 178sub terminate {
189 push @destroy, $current; 179 $current->cancel;
190 $terminate->ready;
191 &schedule; 180 &schedule;
192 # NORETURN 181 die; # NORETURN
193} 182}
194 183
195=back 184=back
196 185
197# dynamic methods 186# dynamic methods
… …
228 217
229Put the current process into the ready queue. 218Put the current process into the ready queue.
230 219
231=cut 220=cut
232 221
233sub ready { 222=item $process->cancel
223
224Like C<terminate>, but terminates the specified process instead.
225
226=cut
227
228sub cancel {
234 push @ready, $_[0]; 229 push @destroy, $_[0];
230 $manager->ready;
235} 231}
236 232
237=back 233=back
238 234
239=cut 235=cut
… …
255 allow per-thread schedulers, but Coro::State does not yet allow this). 251 allow per-thread schedulers, but Coro::State does not yet allow this).
256 252
257=head1 SEE ALSO 253=head1 SEE ALSO
258 254
259L<Coro::Channel>, L<Coro::Cont>, L<Coro::Specific>, L<Coro::Semaphore>, 255L<Coro::Channel>, L<Coro::Cont>, L<Coro::Specific>, L<Coro::Semaphore>,
260L<Coro::Signal>, L<Coro::State>, L<Coro::Event>. 256L<Coro::Signal>, L<Coro::State>, L<Coro::Event>, L<Coro::RWLock>,
257L<Coro::Handle>, L<Coro::Socket>.
261 258
262=head1 AUTHOR 259=head1 AUTHOR
263 260
264 Marc Lehmann <pcg@goof.com> 261 Marc Lehmann <pcg@goof.com>
265 http://www.goof.com/pcg/marc/ 262 http://www.goof.com/pcg/marc/

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