296 lines
9.6 KiB
Perl
296 lines
9.6 KiB
Perl
package Slic3r;
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# Copyright holder: Alessandro Ranellucci
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# This application is licensed under the GNU Affero General Public License, version 3
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use strict;
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use warnings;
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require v5.10;
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our $VERSION = VERSION();
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our $debug = 0;
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sub debugf {
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printf @_ if $debug;
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}
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# load threads before Moo as required by it
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our $have_threads;
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BEGIN {
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use Config;
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$have_threads = $Config{useithreads} && eval "use threads; use threads::shared; use Thread::Queue; 1";
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warn "threads.pm >= 1.96 is required, please update\n" if $have_threads && $threads::VERSION < 1.96;
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### temporarily disable threads if using the broken Moo version
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use Moo;
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$have_threads = 0 if $Moo::VERSION == 1.003000;
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}
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warn "Running Slic3r under Perl 5.16 is not supported nor recommended\n"
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if $^V == v5.16;
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use FindBin;
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our $var = decode_path($FindBin::Bin) . "/var";
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use Moo 1.003001;
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use Slic3r::XS; # import all symbols (constants etc.) before they get parsed
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use Slic3r::Config;
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use Slic3r::ExPolygon;
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use Slic3r::ExtrusionLoop;
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use Slic3r::ExtrusionPath;
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use Slic3r::Fill;
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use Slic3r::Flow;
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use Slic3r::Format::AMF;
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use Slic3r::Format::OBJ;
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use Slic3r::Format::STL;
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use Slic3r::GCode::ArcFitting;
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use Slic3r::GCode::CoolingBuffer;
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use Slic3r::GCode::MotionPlanner;
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use Slic3r::GCode::PressureRegulator;
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use Slic3r::GCode::Reader;
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use Slic3r::GCode::SpiralVase;
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use Slic3r::GCode::VibrationLimit;
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use Slic3r::Geometry qw(PI);
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use Slic3r::Geometry::Clipper;
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use Slic3r::Layer;
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use Slic3r::Line;
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use Slic3r::Model;
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use Slic3r::Point;
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use Slic3r::Polygon;
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use Slic3r::Polyline;
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use Slic3r::Print;
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use Slic3r::Print::GCode;
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use Slic3r::Print::Object;
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use Slic3r::Print::Simple;
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use Slic3r::Print::SupportMaterial;
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use Slic3r::Surface;
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our $build = eval "use Slic3r::Build; 1";
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use Thread::Semaphore;
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use Encode::Locale 1.05;
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use Encode;
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use Unicode::Normalize;
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use constant SCALING_FACTOR => 0.000001;
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use constant RESOLUTION => 0.0125;
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use constant SCALED_RESOLUTION => RESOLUTION / SCALING_FACTOR;
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use constant LOOP_CLIPPING_LENGTH_OVER_NOZZLE_DIAMETER => 0.15;
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use constant INFILL_OVERLAP_OVER_SPACING => 0.3;
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# keep track of threads we created
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my @my_threads = ();
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my @threads : shared = ();
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my $pause_sema = Thread::Semaphore->new;
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my $parallel_sema;
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my $paused = 0;
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sub spawn_thread {
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my ($cb) = @_;
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my $parent_tid = threads->tid;
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lock @threads;
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@_ = ();
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my $thread = threads->create(sub {
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@my_threads = ();
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Slic3r::debugf "Starting thread %d (parent: %d)...\n", threads->tid, $parent_tid;
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local $SIG{'KILL'} = sub {
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Slic3r::debugf "Exiting thread %d...\n", threads->tid;
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$parallel_sema->up if $parallel_sema;
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kill_all_threads();
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Slic3r::thread_cleanup();
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threads->exit();
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};
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local $SIG{'STOP'} = sub {
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$pause_sema->down;
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$pause_sema->up;
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};
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$cb->();
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});
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push @my_threads, $thread->tid;
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push @threads, $thread->tid;
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return $thread;
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}
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sub parallelize {
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my %params = @_;
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lock @threads;
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if (!$params{disable} && $Slic3r::have_threads && $params{threads} > 1) {
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my @items = (ref $params{items} eq 'CODE') ? $params{items}->() : @{$params{items}};
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my $q = Thread::Queue->new;
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$q->enqueue(@items, (map undef, 1..$params{threads}));
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$parallel_sema = Thread::Semaphore->new(-$params{threads});
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$parallel_sema->up;
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my $thread_cb = sub {
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# execute thread callback
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$params{thread_cb}->($q);
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# signal the parent thread that we're done
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$parallel_sema->up;
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# cleanup before terminating thread
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Slic3r::thread_cleanup();
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# This explicit exit avoids an untrappable
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# "Attempt to free unreferenced scalar" error
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# triggered on Ubuntu 12.04 32-bit when we're running
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# from the Wx plater and
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# we're reusing the same plater object more than once.
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# The downside to using this exit is that we can't return
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# any value to the main thread but we're not doing that
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# anymore anyway.
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threads->exit;
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};
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@_ = ();
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my @my_threads = map spawn_thread($thread_cb), 1..$params{threads};
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# We use a semaphore instead of $th->join because joined threads are
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# not listed by threads->list or threads->object anymore, thus can't
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# be signalled.
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$parallel_sema->down;
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$_->detach for @my_threads;
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} else {
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$params{no_threads_cb}->();
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}
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}
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# call this at the very end of each thread (except the main one)
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# so that it does not try to free existing objects.
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# at that stage, existing objects are only those that we
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# inherited at the thread creation (thus shared) and those
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# that we are returning: destruction will be handled by the
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# main thread in both cases.
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# reminder: do not destroy inherited objects in other threads,
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# as the main thread will still try to destroy them when they
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# go out of scope; in other words, if you're undef()'ing an
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# object in a thread, make sure the main thread still holds a
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# reference so that it won't be destroyed in thread.
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sub thread_cleanup {
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return if !$Slic3r::have_threads;
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# prevent destruction of shared objects
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no warnings 'redefine';
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*Slic3r::BridgeDetector::DESTROY = sub {};
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*Slic3r::Config::DESTROY = sub {};
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*Slic3r::Config::Full::DESTROY = sub {};
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*Slic3r::Config::GCode::DESTROY = sub {};
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*Slic3r::Config::Print::DESTROY = sub {};
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*Slic3r::Config::PrintObject::DESTROY = sub {};
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*Slic3r::Config::PrintRegion::DESTROY = sub {};
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*Slic3r::ExPolygon::DESTROY = sub {};
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*Slic3r::ExPolygon::Collection::DESTROY = sub {};
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*Slic3r::Extruder::DESTROY = sub {};
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*Slic3r::ExtrusionLoop::DESTROY = sub {};
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*Slic3r::ExtrusionPath::DESTROY = sub {};
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*Slic3r::ExtrusionPath::Collection::DESTROY = sub {};
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*Slic3r::Flow::DESTROY = sub {};
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*Slic3r::GCode::DESTROY = sub {};
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*Slic3r::GCode::AvoidCrossingPerimeters::DESTROY = sub {};
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*Slic3r::GCode::OozePrevention::DESTROY = sub {};
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*Slic3r::GCode::PlaceholderParser::DESTROY = sub {};
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*Slic3r::GCode::Wipe::DESTROY = sub {};
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*Slic3r::GCode::Writer::DESTROY = sub {};
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*Slic3r::Geometry::BoundingBox::DESTROY = sub {};
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*Slic3r::Geometry::BoundingBoxf::DESTROY = sub {};
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*Slic3r::Geometry::BoundingBoxf3::DESTROY = sub {};
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*Slic3r::Layer::PerimeterGenerator::DESTROY = sub {};
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*Slic3r::Line::DESTROY = sub {};
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*Slic3r::Linef3::DESTROY = sub {};
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*Slic3r::Model::DESTROY = sub {};
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*Slic3r::Model::Object::DESTROY = sub {};
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*Slic3r::Point::DESTROY = sub {};
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*Slic3r::Pointf::DESTROY = sub {};
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*Slic3r::Pointf3::DESTROY = sub {};
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*Slic3r::Polygon::DESTROY = sub {};
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*Slic3r::Polyline::DESTROY = sub {};
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*Slic3r::Polyline::Collection::DESTROY = sub {};
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*Slic3r::Print::DESTROY = sub {};
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*Slic3r::Print::Object::DESTROY = sub {};
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*Slic3r::Print::Region::DESTROY = sub {};
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*Slic3r::Surface::DESTROY = sub {};
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*Slic3r::Surface::Collection::DESTROY = sub {};
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*Slic3r::TriangleMesh::DESTROY = sub {};
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return undef; # this prevents a "Scalars leaked" warning
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}
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sub get_running_threads {
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return grep defined($_), map threads->object($_), @_;
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}
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sub kill_all_threads {
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# if we're the main thread, we send SIGKILL to all the running threads
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if (threads->tid == 0) {
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lock @threads;
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foreach my $thread (get_running_threads(@threads)) {
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Slic3r::debugf "Thread %d killing %d...\n", threads->tid, $thread->tid;
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$thread->kill('KILL');
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}
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# unlock semaphore before we block on wait
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# otherwise we'd get a deadlock if threads were paused
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resume_all_threads();
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}
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# in any thread we wait for our children
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foreach my $thread (get_running_threads(@my_threads)) {
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Slic3r::debugf " Thread %d waiting for %d...\n", threads->tid, $thread->tid;
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$thread->join; # block until threads are killed
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Slic3r::debugf " Thread %d finished waiting for %d...\n", threads->tid, $thread->tid;
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}
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@my_threads = ();
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}
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sub pause_all_threads {
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return if $paused;
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lock @threads;
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$paused = 1;
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$pause_sema->down;
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$_->kill('STOP') for get_running_threads(@threads);
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}
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sub resume_all_threads {
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return unless $paused;
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lock @threads;
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$paused = 0;
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$pause_sema->up;
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}
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sub encode_path {
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my ($path) = @_;
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$path = Unicode::Normalize::NFC($path);
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$path = Encode::encode(locale_fs => $path);
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return $path;
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}
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sub decode_path {
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my ($path) = @_;
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$path = Encode::decode(locale_fs => $path)
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unless utf8::is_utf8($path);
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# The filesystem might force a normalization form (like HFS+ does) so
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# if we rely on the filename being comparable after the open() + readdir()
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# roundtrip (like when creating and then selecting a preset), we need to
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# restore our normalization form.
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$path = Unicode::Normalize::NFC($path);
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return $path;
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}
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sub open {
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my ($fh, $mode, $filename) = @_;
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return CORE::open $$fh, $mode, encode_path($filename);
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}
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# this package declaration prevents an ugly fatal warning to be emitted when
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# spawning a new thread
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package GLUquadricObjPtr;
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1;
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