| … | |
… | |
| 257 | pre-load it into your L<AnyEvent::Fork> process, or you can add a C<use> |
257 | pre-load it into your L<AnyEvent::Fork> process, or you can add a C<use> |
| 258 | or C<require> statement into the serialiser string. Or both. |
258 | or C<require> statement into the serialiser string. Or both. |
| 259 | |
259 | |
| 260 | =back |
260 | =back |
| 261 | |
261 | |
| 262 | See the examples section earlier in this document for some actual examples. |
262 | See the examples section earlier in this document for some actual |
|
|
263 | examples. |
| 263 | |
264 | |
| 264 | =cut |
265 | =cut |
| 265 | |
266 | |
| 266 | our $STRING_SERIALISER = '(sub { pack "(w/a*)*", @_ }, sub { unpack "(w/a*)*", shift })'; |
267 | our $STRING_SERIALISER = '(sub { pack "(w/a*)*", @_ }, sub { unpack "(w/a*)*", shift })'; |
| 267 | |
268 | |
| … | |
… | |
| 281 | # default for on_event is to raise an error |
282 | # default for on_event is to raise an error |
| 282 | $on_event ||= sub { $on_error->("event received, but no on_event handler") }; |
283 | $on_event ||= sub { $on_error->("event received, but no on_event handler") }; |
| 283 | |
284 | |
| 284 | my ($f, $t) = eval $serialiser; die $@ if $@; |
285 | my ($f, $t) = eval $serialiser; die $@ if $@; |
| 285 | |
286 | |
| 286 | my (@rcb, $fh, $shutdown, $wbuf, $ww, $rw); |
287 | my (@rcb, %rcb, $fh, $shutdown, $wbuf, $ww); |
| 287 | my ($rlen, $rbuf) = 512 - 16; |
288 | my ($rlen, $rbuf, $rw) = 512 - 16; |
| 288 | |
289 | |
| 289 | my $wcb = sub { |
290 | my $wcb = sub { |
| 290 | my $len = syswrite $fh, $wbuf; |
291 | my $len = syswrite $fh, $wbuf; |
| 291 | |
292 | |
| 292 | if (!defined $len) { |
293 | unless (defined $len) { |
| 293 | if ($! != Errno::EAGAIN && $! != Errno::EWOULDBLOCK) { |
294 | if ($! != Errno::EAGAIN && $! != Errno::EWOULDBLOCK) { |
| 294 | undef $rw; undef $ww; # it ends here |
295 | undef $rw; undef $ww; # it ends here |
| 295 | $on_error->("$!"); |
296 | $on_error->("$!"); |
| 296 | } |
297 | } |
| 297 | } |
298 | } |
| … | |
… | |
| 308 | |
309 | |
| 309 | $self->require ($module) |
310 | $self->require ($module) |
| 310 | ->send_arg ($function, $arg{init}, $serialiser) |
311 | ->send_arg ($function, $arg{init}, $serialiser) |
| 311 | ->run ("$module\::run", sub { |
312 | ->run ("$module\::run", sub { |
| 312 | $fh = shift; |
313 | $fh = shift; |
|
|
314 | |
|
|
315 | my ($id, $len); |
| 313 | $rw = AE::io $fh, 0, sub { |
316 | $rw = AE::io $fh, 0, sub { |
| 314 | $rlen = $rlen * 2 + 16 if $rlen - 128 < length $rbuf; |
317 | $rlen = $rlen * 2 + 16 if $rlen - 128 < length $rbuf; |
| 315 | my $len = sysread $fh, $rbuf, $rlen - length $rbuf, length $rbuf; |
318 | $len = sysread $fh, $rbuf, $rlen - length $rbuf, length $rbuf; |
| 316 | |
319 | |
| 317 | if ($len) { |
320 | if ($len) { |
| 318 | while (4 <= length $rbuf) { |
321 | while (8 <= length $rbuf) { |
| 319 | $len = unpack "L", $rbuf; |
322 | ($id, $len) = unpack "LL", $rbuf; |
| 320 | 4 + $len <= length $rbuf |
323 | 8 + $len <= length $rbuf |
| 321 | or last; |
324 | or last; |
| 322 | |
325 | |
| 323 | my @r = $t->(substr $rbuf, 4, $len); |
326 | my @r = $t->(substr $rbuf, 8, $len); |
| 324 | substr $rbuf, 0, $len + 4, ""; |
327 | substr $rbuf, 0, 8 + $len, ""; |
|
|
328 | |
|
|
329 | if ($id) { |
|
|
330 | if (@rcb) { |
|
|
331 | (shift @rcb)->(@r); |
|
|
332 | } elsif (my $cb = delete $rcb{$id}) { |
|
|
333 | $cb->(@r); |
|
|
334 | } else { |
|
|
335 | undef $rw; undef $ww; |
|
|
336 | $on_error->("unexpected data from child"); |
| 325 | |
337 | } |
| 326 | if (pop @r) { |
338 | } else { |
| 327 | $on_event->(@r); |
339 | $on_event->(@r); |
| 328 | } elsif (@rcb) { |
|
|
| 329 | (shift @rcb)->(@r); |
|
|
| 330 | } else { |
|
|
| 331 | undef $rw; undef $ww; |
|
|
| 332 | $on_error->("unexpected data from child"); |
|
|
| 333 | } |
340 | } |
| 334 | } |
341 | } |
| 335 | } elsif (defined $len) { |
342 | } elsif (defined $len) { |
| 336 | undef $rw; undef $ww; # it ends here |
343 | undef $rw; undef $ww; # it ends here |
| 337 | |
344 | |
| 338 | if (@rcb) { |
345 | if (@rcb || %rcb) { |
|
|
346 | use Data::Dump;ddx[\@rcb,\%rcb];#d# |
| 339 | $on_error->("unexpected eof"); |
347 | $on_error->("unexpected eof"); |
| 340 | } else { |
348 | } else { |
| 341 | $on_destroy->(); |
349 | $on_destroy->(); |
| 342 | } |
350 | } |
| 343 | } elsif ($! != Errno::EAGAIN && $! != Errno::EWOULDBLOCK) { |
351 | } elsif ($! != Errno::EAGAIN && $! != Errno::EWOULDBLOCK) { |
| … | |
… | |
| 352 | my $guard = Guard::guard { |
360 | my $guard = Guard::guard { |
| 353 | $shutdown = 1; |
361 | $shutdown = 1; |
| 354 | $ww ||= $fh && AE::io $fh, 1, $wcb; |
362 | $ww ||= $fh && AE::io $fh, 1, $wcb; |
| 355 | }; |
363 | }; |
| 356 | |
364 | |
|
|
365 | my $id; |
|
|
366 | |
|
|
367 | $arg{async} |
| 357 | sub { |
368 | ? sub { |
| 358 | push @rcb, pop; |
369 | $id = ($id == 0xffffffff ? 0 : $id) + 1; |
|
|
370 | $id = ($id == 0xffffffff ? 0 : $id) + 1 while exists $rcb{$id}; # rarely loops |
| 359 | |
371 | |
|
|
372 | $rcb{$id} = pop; |
|
|
373 | |
| 360 | $guard; # keep it alive |
374 | $guard; # keep it alive |
| 361 | |
375 | |
| 362 | $wbuf .= pack "L/a*", &$f; |
376 | $wbuf .= pack "LL/a*", $id, &$f; |
| 363 | $ww ||= $fh && AE::io $fh, 1, $wcb; |
377 | $ww ||= $fh && AE::io $fh, 1, $wcb; |
| 364 | } |
378 | } |
|
|
379 | : sub { |
|
|
380 | push @rcb, pop; |
|
|
381 | |
|
|
382 | $guard; # keep it alive |
|
|
383 | |
|
|
384 | $wbuf .= pack "L/a*", &$f; |
|
|
385 | $ww ||= $fh && AE::io $fh, 1, $wcb; |
|
|
386 | } |
| 365 | } |
387 | } |
| 366 | |
388 | |
| 367 | =item $rpc->(..., $cb->(...)) |
389 | =item $rpc->(..., $cb->(...)) |
| 368 | |
390 | |
| 369 | The RPC object returned by C<AnyEvent::Fork::RPC::run> is actually a code |
391 | The RPC object returned by C<AnyEvent::Fork::RPC::run> is actually a code |
