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39 | use base Exporter; |
39 | use base Exporter; |
40 | |
40 | |
41 | $VERSION = 0.45; |
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_TAGS = ( |
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45 | prio => [qw(PRIO_MAX PRIO_HIGH PRIO_NORMAL PRIO_LOW PRIO_IDLE PRIO_MIN)], |
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46 | ); |
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47 | @EXPORT_OK = @{$EXPORT_TAGS{prio}}; |
45 | |
48 | |
46 | { |
49 | { |
47 | my @async; |
50 | my @async; |
48 | my $init; |
51 | my $init; |
49 | |
52 | |
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118 | delete ((pop @destroy)->{_coro_state}) while @destroy; |
121 | delete ((pop @destroy)->{_coro_state}) while @destroy; |
119 | &schedule; |
122 | &schedule; |
120 | } |
123 | } |
121 | }; |
124 | }; |
122 | |
125 | |
123 | # we really need priorities... |
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124 | my @ready; # the ready queue. hehe, rather broken ;) |
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125 | |
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126 | # static methods. not really. |
126 | # static methods. not really. |
127 | |
127 | |
128 | =head2 STATIC METHODS |
128 | =head2 STATIC METHODS |
129 | |
129 | |
130 | Static methods are actually functions that operate on the current process only. |
130 | Static methods are actually functions that operate on the current process only. |
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160 | into the ready queue, so calling this function usually means you will |
160 | into the ready queue, so calling this function usually means you will |
161 | never be called again. |
161 | never be called again. |
162 | |
162 | |
163 | =cut |
163 | =cut |
164 | |
164 | |
165 | my $prev; |
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166 | |
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167 | sub schedule { |
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168 | # should be done using priorities :( |
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169 | ($prev, $current) = ($current, shift @ready || $idle); |
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170 | Coro::State::transfer($prev, $current); |
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171 | } |
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172 | |
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173 | =item cede |
165 | =item cede |
174 | |
166 | |
175 | "Cede" to other processes. This function puts the current process into the |
167 | "Cede" to other processes. This function puts the current process into the |
176 | ready queue and calls C<schedule>, which has the effect of giving up the |
168 | ready queue and calls C<schedule>, which has the effect of giving up the |
177 | current "timeslice" to other coroutines of the same or higher priority. |
169 | current "timeslice" to other coroutines of the same or higher priority. |
178 | |
170 | |
179 | =cut |
171 | =cut |
180 | |
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181 | sub cede { |
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182 | $current->ready; |
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183 | &schedule; |
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184 | } |
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185 | |
172 | |
186 | =item terminate |
173 | =item terminate |
187 | |
174 | |
188 | Terminates the current process. |
175 | Terminates the current process. |
189 | |
176 | |
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233 | |
220 | |
234 | Put the current process into the ready queue. |
221 | Put the current process into the ready queue. |
235 | |
222 | |
236 | =cut |
223 | =cut |
237 | |
224 | |
238 | sub ready { |
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239 | push @ready, $_[0]; |
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240 | } |
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241 | |
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242 | =item $process->cancel |
225 | =item $process->cancel |
243 | |
226 | |
244 | Like C<terminate>, but terminates the specified process instead. |
227 | Like C<terminate>, but terminates the specified process instead. |
245 | |
228 | |
246 | =cut |
229 | =cut |
247 | |
230 | |
248 | sub cancel { |
231 | sub cancel { |
249 | push @destroy, $_[0]; |
232 | push @destroy, $_[0]; |
250 | $manager->ready; |
233 | $manager->ready; |
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234 | } |
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235 | |
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236 | =item $oldprio = $process->prio($newprio) |
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237 | |
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238 | Sets the priority of the process. Higher priority processes get run before |
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239 | lower priority processes. Priorities are smalled signed integer (currently |
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240 | -4 .. +3), that you can refer to using PRIO_xxx constants (use the import |
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241 | tag :prio to get then): |
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242 | |
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243 | PRIO_MAX > PRIO_HIGH > PRIO_NORMAL > PRIO_LOW > PRIO_IDLE > PRIO_MIN |
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244 | 3 > 1 > 0 > -1 > -3 > -4 |
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245 | |
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246 | # set priority to HIGH |
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247 | current->prio(PRIO_HIGH); |
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248 | |
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249 | The idle coroutine ($Coro::idle) always has a lower priority than any |
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250 | existing coroutine. |
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251 | |
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252 | Changing the priority of the current process will take effect immediately, |
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253 | but changing the priority of processes in the ready queue (but not |
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254 | running) will only take effect after the next schedule (of that |
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255 | process). This is a bug that will be fixed in some future version. |
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256 | |
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257 | =cut |
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258 | |
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259 | sub prio { |
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260 | my $old = $_[0]{prio}; |
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261 | $_[0]{prio} = $_[1] if @_ > 1; |
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262 | $old; |
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263 | } |
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264 | |
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265 | =item $newprio = $process->nice($change) |
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266 | |
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267 | Similar to C<prio>, but subtract the given value from the priority (i.e. |
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268 | higher values mean lower priority, just as in unix). |
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269 | |
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270 | =cut |
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271 | |
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272 | sub nice { |
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273 | $_[0]{prio} -= $_[1]; |
251 | } |
274 | } |
252 | |
275 | |
253 | =back |
276 | =back |
254 | |
277 | |
255 | =cut |
278 | =cut |