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| 35 | use strict; |
35 | use strict; |
| 36 | no warnings "uninitialized"; |
36 | no warnings "uninitialized"; |
| 37 | |
37 | |
| 38 | use Coro::State; |
38 | use Coro::State; |
| 39 | |
39 | |
| 40 | use base Exporter::; |
40 | use base qw(Coro::State Exporter); |
| 41 | |
41 | |
| 42 | our $idle; # idle coroutine |
42 | our $idle; # idle handler |
| 43 | our $main; # main coroutine |
43 | our $main; # main coroutine |
| 44 | our $current; # current coroutine |
44 | our $current; # current coroutine |
| 45 | |
45 | |
| 46 | our $VERSION = '2.5'; |
46 | our $VERSION = '2.5'; |
| 47 | |
47 | |
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| 95 | |
95 | |
| 96 | $main = new Coro; |
96 | $main = new Coro; |
| 97 | |
97 | |
| 98 | =item $current (or as function: current) |
98 | =item $current (or as function: current) |
| 99 | |
99 | |
| 100 | The current coroutine (the last coroutine switched to). The initial value is C<$main> (of course). |
100 | The current coroutine (the last coroutine switched to). The initial value |
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101 | is C<$main> (of course). |
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102 | |
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103 | This variable is B<strictly> I<read-only>. It is provided for performance |
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104 | reasons. If performance is not essentiel you are encouraged to use the |
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105 | C<Coro::current> function instead. |
| 101 | |
106 | |
| 102 | =cut |
107 | =cut |
| 103 | |
108 | |
| 104 | # maybe some other module used Coro::Specific before... |
109 | # maybe some other module used Coro::Specific before... |
| 105 | if ($current) { |
110 | if ($current) { |
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| 110 | |
115 | |
| 111 | sub current() { $current } |
116 | sub current() { $current } |
| 112 | |
117 | |
| 113 | =item $idle |
118 | =item $idle |
| 114 | |
119 | |
| 115 | The coroutine to switch to when no other coroutine is running. The default |
120 | A callback that is called whenever the scheduler finds no ready coroutines |
| 116 | implementation prints "FATAL: deadlock detected" and exits. |
121 | to run. The default implementation prints "FATAL: deadlock detected" and |
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122 | exits. |
| 117 | |
123 | |
| 118 | =cut |
124 | This hook is overwritten by modules such as C<Coro::Timer> and |
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125 | C<Coro::Event> to wait on an external event that hopefully wakes up some |
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126 | coroutine. |
| 119 | |
127 | |
| 120 | # should be done using priorities :( |
128 | =cut |
| 121 | $idle = new Coro sub { |
129 | |
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130 | $idle = sub { |
| 122 | print STDERR "FATAL: deadlock detected\n"; |
131 | print STDERR "FATAL: deadlock detected\n"; |
| 123 | exit(51); |
132 | exit (51); |
| 124 | }; |
133 | }; |
| 125 | |
134 | |
| 126 | # this coroutine is necessary because a coroutine |
135 | # this coroutine is necessary because a coroutine |
| 127 | # cannot destroy itself. |
136 | # cannot destroy itself. |
| 128 | my @destroy; |
137 | my @destroy; |
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| 137 | while (@destroy) { |
146 | while (@destroy) { |
| 138 | my $coro = pop @destroy; |
147 | my $coro = pop @destroy; |
| 139 | $coro->{status} ||= []; |
148 | $coro->{status} ||= []; |
| 140 | $_->ready for @{delete $coro->{join} || []}; |
149 | $_->ready for @{delete $coro->{join} || []}; |
| 141 | |
150 | |
| 142 | # the next line destroys the _coro_state, but keeps the |
151 | # the next line destroys the coro state, but keeps the |
| 143 | # process itself intact (we basically make it a zombie |
152 | # process itself intact (we basically make it a zombie |
| 144 | # process that always runs the manager thread, so it's possible |
153 | # process that always runs the manager thread, so it's possible |
| 145 | # to transfer() to this process). |
154 | # to transfer() to this process). |
| 146 | $coro->{_coro_state} = $manager->{_coro_state}; |
155 | $coro->_clone_state_from ($manager); |
| 147 | } |
156 | } |
| 148 | &schedule; |
157 | &schedule; |
| 149 | } |
158 | } |
| 150 | }; |
159 | }; |
| 151 | |
160 | |
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| 175 | |
184 | |
| 176 | =cut |
185 | =cut |
| 177 | |
186 | |
| 178 | sub async(&@) { |
187 | sub async(&@) { |
| 179 | my $pid = new Coro @_; |
188 | my $pid = new Coro @_; |
| 180 | $manager->ready; # this ensures that the stack is cloned from the manager |
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| 181 | $pid->ready; |
189 | $pid->ready; |
| 182 | $pid; |
190 | $pid |
| 183 | } |
191 | } |
| 184 | |
192 | |
| 185 | =item schedule |
193 | =item schedule |
| 186 | |
194 | |
| 187 | Calls the scheduler. Please note that the current process will not be put |
195 | Calls the scheduler. Please note that the current process will not be put |
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| 225 | called. To make the process run you must first put it into the ready queue |
233 | called. To make the process run you must first put it into the ready queue |
| 226 | by calling the ready method. |
234 | by calling the ready method. |
| 227 | |
235 | |
| 228 | =cut |
236 | =cut |
| 229 | |
237 | |
| 230 | sub _newcoro { |
238 | sub _new_coro { |
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239 | $current->_clear_idle_sp; # set the idle sp on the following cede |
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240 | _set_cede_self; # ensures that cede cede's us first |
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241 | cede; |
| 231 | terminate &{+shift}; |
242 | terminate &{+shift}; |
| 232 | } |
243 | } |
| 233 | |
244 | |
| 234 | sub new { |
245 | sub new { |
| 235 | my $class = shift; |
246 | my $class = shift; |
| 236 | bless { |
247 | |
| 237 | _coro_state => (new Coro::State $_[0] && \&_newcoro, @_), |
248 | $class->SUPER::new (\&_new_coro, @_) |
| 238 | }, $class; |
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| 239 | } |
249 | } |
| 240 | |
250 | |
| 241 | =item $process->ready |
251 | =item $process->ready |
| 242 | |
252 | |
| 243 | Put the given process into the ready queue. |
253 | Put the given process into the ready queue. |
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| 274 | &schedule; |
284 | &schedule; |
| 275 | } |
285 | } |
| 276 | wantarray ? @{$self->{status}} : $self->{status}[0]; |
286 | wantarray ? @{$self->{status}} : $self->{status}[0]; |
| 277 | } |
287 | } |
| 278 | |
288 | |
| 279 | =item $oldprio = $process->prio($newprio) |
289 | =item $oldprio = $process->prio ($newprio) |
| 280 | |
290 | |
| 281 | Sets (or gets, if the argument is missing) the priority of the |
291 | Sets (or gets, if the argument is missing) the priority of the |
| 282 | process. Higher priority processes get run before lower priority |
292 | process. Higher priority processes get run before lower priority |
| 283 | processes. Priorities are small signed integers (currently -4 .. +3), |
293 | processes. Priorities are small signed integers (currently -4 .. +3), |
| 284 | that you can refer to using PRIO_xxx constants (use the import tag :prio |
294 | that you can refer to using PRIO_xxx constants (use the import tag :prio |
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| 296 | Changing the priority of the current process will take effect immediately, |
306 | Changing the priority of the current process will take effect immediately, |
| 297 | but changing the priority of processes in the ready queue (but not |
307 | but changing the priority of processes in the ready queue (but not |
| 298 | running) will only take effect after the next schedule (of that |
308 | running) will only take effect after the next schedule (of that |
| 299 | process). This is a bug that will be fixed in some future version. |
309 | process). This is a bug that will be fixed in some future version. |
| 300 | |
310 | |
| 301 | =cut |
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| 302 | |
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| 303 | sub prio { |
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| 304 | my $old = $_[0]{prio}; |
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| 305 | $_[0]{prio} = $_[1] if @_ > 1; |
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| 306 | $old; |
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| 307 | } |
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| 308 | |
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| 309 | =item $newprio = $process->nice($change) |
311 | =item $newprio = $process->nice ($change) |
| 310 | |
312 | |
| 311 | Similar to C<prio>, but subtract the given value from the priority (i.e. |
313 | Similar to C<prio>, but subtract the given value from the priority (i.e. |
| 312 | higher values mean lower priority, just as in unix). |
314 | higher values mean lower priority, just as in unix). |
| 313 | |
315 | |
| 314 | =cut |
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| 315 | |
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| 316 | sub nice { |
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| 317 | $_[0]{prio} -= $_[1]; |
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| 318 | } |
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| 319 | |
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| 320 | =item $olddesc = $process->desc($newdesc) |
316 | =item $olddesc = $process->desc ($newdesc) |
| 321 | |
317 | |
| 322 | Sets (or gets in case the argument is missing) the description for this |
318 | Sets (or gets in case the argument is missing) the description for this |
| 323 | process. This is just a free-form string you can associate with a process. |
319 | process. This is just a free-form string you can associate with a process. |
| 324 | |
320 | |
| 325 | =cut |
321 | =cut |
