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Comparing Coro/Coro.pm (file contents):
Revision 1.9 by root, Sun Jul 15 02:35:52 2001 UTC vs.
Revision 1.19 by root, Sat Jul 21 03:44:06 2001 UTC

… …
18 18
19 yield; 19 yield;
20 20
21=head1 DESCRIPTION 21=head1 DESCRIPTION
22 22
23This module collection manages coroutines. Coroutines are similar to
24Threads but don't run in parallel.
25
26This module is still experimental, see the BUGS section below.
27
23=cut 28=cut
24 29
25package Coro; 30package Coro;
26 31
27use Coro::State; 32use Coro::State;
28 33
29use base Exporter; 34use base Exporter;
30 35
31$VERSION = 0.04; 36$VERSION = 0.09;
32 37
33@EXPORT = qw(async yield schedule); 38@EXPORT = qw(async yield schedule terminate current);
34@EXPORT_OK = qw($current); 39@EXPORT_OK = qw($current);
35 40
36{ 41{
37 use subs 'async'; 42 use subs 'async';
38 43
… …
47 my @attrs; 52 my @attrs;
48 for (@_) { 53 for (@_) {
49 if ($_ eq "Coro") { 54 if ($_ eq "Coro") {
50 push @async, $ref; 55 push @async, $ref;
51 } else { 56 } else {
52 push @attrs, @_; 57 push @attrs, $_;
53 } 58 }
54 } 59 }
55 return $old ? $old->($package, $name, @attrs) : @attrs; 60 return $old ? $old->($package, $ref, @attrs) : @attrs;
56 }; 61 };
57 } 62 }
58 63
59 sub INIT { 64 sub INIT {
60 async pop @async while @async; 65 async pop @async while @async;
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67 72
68=cut 73=cut
69 74
70our $main = new Coro; 75our $main = new Coro;
71 76
72=item $current 77=item $current (or as function: current)
73 78
74The current coroutine (the last coroutine switched to). The initial value is C<$main> (of course). 79The current coroutine (the last coroutine switched to). The initial value is C<$main> (of course).
75 80
76=cut 81=cut
77 82
… …
79if ($current) { 84if ($current) {
80 $main->{specific} = $current->{specific}; 85 $main->{specific} = $current->{specific};
81} 86}
82 87
83our $current = $main; 88our $current = $main;
89
90sub current() { $current }
84 91
85=item $idle 92=item $idle
86 93
87The coroutine to switch to when no other coroutine is running. The default 94The coroutine to switch to when no other coroutine is running. The default
88implementation prints "FATAL: deadlock detected" and exits. 95implementation prints "FATAL: deadlock detected" and exits.
… …
94 print STDERR "FATAL: deadlock detected\n"; 101 print STDERR "FATAL: deadlock detected\n";
95 exit(51); 102 exit(51);
96}; 103};
97 104
98# we really need priorities... 105# we really need priorities...
99my @ready = (); # the ready queue. hehe, rather broken ;) 106my @ready; # the ready queue. hehe, rather broken ;)
100 107
101# static methods. not really. 108# static methods. not really.
102 109
103=head2 STATIC METHODS 110=head2 STATIC METHODS
104 111
105Static methods are actually functions that operate on the current process only. 112Static methods are actually functions that operate on the current process only.
106 113
107=over 4 114=over 4
108 115
109=item async { ... }; 116=item async { ... } [@args...]
110 117
111Create a new asynchronous process and return it's process object 118Create a new asynchronous process and return it's process object
112(usually unused). When the sub returns the new process is automatically 119(usually unused). When the sub returns the new process is automatically
113terminated. 120terminated.
114 121
115=cut 122 # create a new coroutine that just prints its arguments
123 async {
124 print "@_\n";
125 } 1,2,3,4;
116 126
127The coderef you submit MUST NOT be a closure that refers to variables
128in an outer scope. This does NOT work. Pass arguments into it instead.
129
130=cut
131
117sub async(&) { 132sub async(&@) {
118 (new Coro $_[0])->ready; 133 my $pid = new Coro @_;
134 $pid->ready;
135 $pid;
119} 136}
120 137
121=item schedule 138=item schedule
122 139
123Calls the scheduler. Please note that the current process will not be put 140Calls the scheduler. Please note that the current process will not be put
… …
148 165
149=item terminate 166=item terminate
150 167
151Terminates the current process. 168Terminates the current process.
152 169
170Future versions of this function will allow result arguments.
171
153=cut 172=cut
154 173
155sub terminate { 174sub terminate {
175 $current->{_results} = [@_];
156 &schedule; 176 &schedule;
157} 177}
158 178
159=back 179=back
160 180
… …
164 184
165These are the methods you can call on process objects. 185These are the methods you can call on process objects.
166 186
167=over 4 187=over 4
168 188
169=item new Coro \&sub; 189=item new Coro \&sub [, @args...]
170 190
171Create a new process and return it. When the sub returns the process 191Create a new process and return it. When the sub returns the process
172automatically terminates. To start the process you must first put it into 192automatically terminates. To start the process you must first put it into
173the ready queue by calling the ready method. 193the ready queue by calling the ready method.
174 194
195The coderef you submit MUST NOT be a closure that refers to variables
196in an outer scope. This does NOT work. Pass arguments into it instead.
197
175=cut 198=cut
199
200sub _newcoro {
201 terminate &{+shift};
202}
176 203
177sub new { 204sub new {
178 my $class = shift; 205 my $class = shift;
179 my $proc = $_[0];
180 bless { 206 bless {
181 _coro_state => new Coro::State ($proc ? sub { &$proc; &terminate } : $proc), 207 _coro_state => (new Coro::State $_[0] && \&_newcoro, @_),
182 }, $class; 208 }, $class;
183} 209}
184 210
185=item $process->ready 211=item $process->ready
186 212
… …
196 222
197=cut 223=cut
198 224
1991; 2251;
200 226
227=head1 BUGS/LIMITATIONS
228
229 - could be faster, especially when the core would introduce special
230 support for coroutines (like it does for threads).
231 - there is still a memleak on coroutine termination that I could not
232 identify. Could be as small as a single SV.
233 - this module is not well-tested.
234 - if variables or arguments "disappear" (become undef) or become
235 corrupted please contact the author so he cen iron out the
236 remaining bugs.
237 - this module is not thread-safe. You must only ever use this module from
238 the same thread (this requirement might be loosened in the future to
239 allow per-thread schedulers, but Coro::Satte does not yet allow this).
240
201=head1 SEE ALSO 241=head1 SEE ALSO
202 242
203L<Coro::Channel>, L<Coro::Cont>, L<Coro::Specific>, L<Coro::Semaphore>, 243L<Coro::Channel>, L<Coro::Cont>, L<Coro::Specific>, L<Coro::Semaphore>,
204L<Coro::Signal>, L<Coro::State>. 244L<Coro::Signal>, L<Coro::State>, L<Coro::Event>.
205 245
206=head1 AUTHOR 246=head1 AUTHOR
207 247
208 Marc Lehmann <pcg@goof.com> 248 Marc Lehmann <pcg@goof.com>
209 http://www.goof.com/pcg/marc/ 249 http://www.goof.com/pcg/marc/

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