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root |
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%include "std.mgp" |
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%%default 1 bimage "gtk/gtk-window.jpg" 1024x768, center |
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%page |
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%%bimage "gtk/screenshot.jpg" 1600x1200 |
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%center |
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GOOFED |
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%center |
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Generic |
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Object |
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Oriented |
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Flexible |
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Extensible |
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Daemon |
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Perl embedden... einmal anders! |
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Wozu? |
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%pause |
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Ersetzen eines bestehenden Servers |
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%pause |
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Langzeitstabilität |
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%pause |
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Effizienz & Skalierbarkeit |
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Algorithmen sollten einfach und klar ausdrückbar sein |
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%pause |
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Vor- u. Nachteile von Perl: |
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Perl besitzt viele nützliche Module |
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Perl hat viele Abhängigkeiten (externe Dateien...) |
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Perl wird nicht häufig embeddet => wenig Beispiele |
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Perl stabil? Ja, aber nicht automatisch... |
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%page |
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Eckpunke der Implementation |
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%pause |
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Einzelnes Binary |
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keine externen Dateien |
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auch nicht zur Laufzeit, wie PAR |
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%pause |
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Kein komplexes Build-System |
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%pause |
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Feste Perl-Version: Upgrade == Kopfschmerzen |
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Perl-Sourcen integriert |
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Ausgewählte Module |
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%pause |
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Coro |
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%page |
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Microperl |
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µperl, bzw. uperl ist Teil der Perl-Distribution |
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%pause |
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README.micro, Makefile.micro, uconfig.sh |
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%pause |
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sehr spartanisch: C89 + ein bisschen POSIX |
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%pause |
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Tuning |
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%font "t5" |
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<= -DPERL_CORE -DPERL_MICRO -DSTANDARD_C |
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-DPERL_USE_SAFE_PUTENV |
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=> -DPERL_CORE=1 -DPERL_MICRO=1 |
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%pause |
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vi uconfig.sh |
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%page |
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Ergebnis |
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%pause |
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libuperl.a |
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%pause |
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microperl |
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Config.pm |
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%page |
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Bibliotheksdateien |
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%font "t3" |
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UPERL = uperl/microperl -Ilib-perl |
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src/libfiles.c: s/gen_libfiles extensions |
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$(UPERL) s/gen_libfiles >$@ |
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%font "s" |
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%pause |
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gen_libfiles erzeugt src/libfiles.c: |
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%font "t3" |
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const char *embed_files[] = { |
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/* 0 */ |
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"\025Attribute/Handlers.pm\000\000\030Apackage Attribute::Handlers;\01... |
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" "data eq 'ARRAY';\012\011\011\011\\$data = [ \\$data ] unless \\$wa... |
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... |
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, |
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}; |
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const int embed_file_num = 208; |
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%page |
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Module mit XS-Dateien |
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%pause |
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ExtUtils::MakeMaker bietet Support für in-Tree-Builds |
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%pause |
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%font "t5" |
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$TOP/uperl/microperl -I$TOP/lib-perl |
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Makefile.PL INSTALLDIRS=perl |
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PERL_CORE=1 PERL_SRC=$TOP/uperl |
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PERL_LIB=$TOP/lib-perl |
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%font "s" |
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%pause |
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Statische Module |
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%pause |
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%font "t5" |
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make CC=$(CC) OPTIMIZE=$(OPTIMIZE) LINKTYPE=static CCCDLFLAGS= static |
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%page |
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Linken |
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%pause |
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%font "t4" |
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goofed: src/main.o src/xsinit.o src/libfiles.o extensions |
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$(CC) $(CFLAGS) -o $@ src/xsinit.o |
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`find lib-perl/auto -name '*.a' -print` |
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src/main.o src/libfiles.o uperl/libuperl.a |
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$(LIBS) |
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%font "s" |
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%pause |
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xsinit.c enthält boot_Modulname Aufrufe, die die bootstrap-Funktionen registrieren: |
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%pause |
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%font "t4" |
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newXS ("daemon::bootstrap", boot_daemon, file); |
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newXS ("re::bootstrap", boot_re, file); |
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newXS ("POSIX::bootstrap", boot_POSIX, file); |
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\# usw.. |
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%page |
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"Bootstrapping" |
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%pause |
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%font "t4" |
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char *embed_argv[EMBED_ARGC] = { |
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"goofed", "-e", .... |
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}; |
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%pause |
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daemon->bootstrap (0); |
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PerlIO::scalar->bootstrap (0); |
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%pause |
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@INC = sub { |
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open my $fh, '<', \(daemon::libfile ($_[1])) |
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or die "FATAL: loader can't in-memory stream\n"; |
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$fh; |
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}; |
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%pause |
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require daemon; |
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daemon->init; |
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