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