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#include "BackgroundSlicingProcess.hpp"
#include "GUI.hpp"
#include <wx/event.h>
#include <wx/panel.h>
#include <wx/stdpaths.h>
// Print now includes tbb, and tbb includes Windows. This breaks compilation of wxWidgets if included before wx.
#include "../../libslic3r/Print.hpp"
#include "../../libslic3r/Utils.hpp"
#include "../../libslic3r/GCode/PostProcessor.hpp"
//#undef NDEBUG
#include <cassert>
#include <stdexcept>
#include <boost/format.hpp>
#include <boost/nowide/cstdio.hpp>
namespace Slic3r {
namespace GUI {
extern wxPanel *g_wxPlater;
};
BackgroundSlicingProcess::BackgroundSlicingProcess()
{
m_temp_output_path = wxStandardPaths::Get().GetTempDir().utf8_str().data();
m_temp_output_path += (boost::format(".%1%.gcode") % get_current_pid()).str();
}
BackgroundSlicingProcess::~BackgroundSlicingProcess()
{
this->stop();
this->join_background_thread();
boost::nowide::remove(m_temp_output_path.c_str());
}
void BackgroundSlicingProcess::thread_proc()
{
std::unique_lock<std::mutex> lck(m_mutex);
// Let the caller know we are ready to run the background processing task.
m_state = STATE_IDLE;
lck.unlock();
m_condition.notify_one();
for (;;) {
assert(m_state == STATE_IDLE || m_state == STATE_CANCELED || m_state == STATE_FINISHED);
// Wait until a new task is ready to be executed, or this thread should be finished.
lck.lock();
m_condition.wait(lck, [this](){ return m_state == STATE_STARTED || m_state == STATE_EXIT; });
if (m_state == STATE_EXIT)
// Exiting this thread.
break;
// Process the background slicing task.
m_state = STATE_RUNNING;
lck.unlock();
std::string error;
try {
assert(m_print != nullptr);
m_print->process();
if (! m_print->canceled()) {
wxQueueEvent(GUI::g_wxPlater, new wxCommandEvent(m_event_sliced_id));
m_print->export_gcode(m_temp_output_path, m_gcode_preview_data);
if (! m_print->canceled() && ! m_output_path.empty()) {
if (copy_file(m_temp_output_path, m_output_path) != 0)
throw std::runtime_error("Copying of the temporary G-code to the output G-code failed");
m_print->set_status(95, "Running post-processing scripts");
run_post_process_scripts(m_output_path, m_print->config());
}
}
} catch (CanceledException &ex) {
// Canceled, this is all right.
assert(m_print->canceled());
} catch (std::exception &ex) {
error = ex.what();
} catch (...) {
error = "Unknown C++ exception.";
}
lck.lock();
m_state = m_print->canceled() ? STATE_CANCELED : STATE_FINISHED;
wxCommandEvent evt(m_event_finished_id);
evt.SetString(error);
evt.SetInt(m_print->canceled() ? -1 : (error.empty() ? 1 : 0));
wxQueueEvent(GUI::g_wxPlater, evt.Clone());
m_print->restart();
lck.unlock();
// Let the UI thread wake up if it is waiting for the background task to finish.
m_condition.notify_one();
// Let the UI thread see the result.
}
m_state = STATE_EXITED;
lck.unlock();
// End of the background processing thread. The UI thread should join m_thread now.
}
void BackgroundSlicingProcess::join_background_thread()
{
std::unique_lock<std::mutex> lck(m_mutex);
if (m_state == STATE_INITIAL) {
// Worker thread has not been started yet.
assert(! m_thread.joinable());
} else {
assert(m_state == STATE_IDLE);
assert(m_thread.joinable());
// Notify the worker thread to exit.
m_state = STATE_EXIT;
lck.unlock();
m_condition.notify_one();
// Wait until the worker thread exits.
m_thread.join();
}
}
bool BackgroundSlicingProcess::start()
{
std::unique_lock<std::mutex> lck(m_mutex);
if (m_state == STATE_INITIAL) {
// The worker thread is not running yet. Start it.
assert(! m_thread.joinable());
m_thread = std::thread([this]{this->thread_proc();});
// Wait until the worker thread is ready to execute the background processing task.
m_condition.wait(lck, [this](){ return m_state == STATE_IDLE; });
}
assert(m_state == STATE_IDLE || this->running());
if (this->running())
// The background processing thread is already running.
return false;
if (! this->idle())
throw std::runtime_error("Cannot start a background task, the worker thread is not idle.");
m_state = STATE_STARTED;
lck.unlock();
m_condition.notify_one();
return true;
}
bool BackgroundSlicingProcess::stop()
{
std::unique_lock<std::mutex> lck(m_mutex);
if (m_state == STATE_INITIAL) {
this->m_output_path.clear();
return false;
}
assert(this->running());
if (m_state == STATE_STARTED || m_state == STATE_RUNNING) {
m_print->cancel();
// Wait until the background processing stops by being canceled.
m_condition.wait(lck, [this](){ return m_state == STATE_CANCELED; });
// In the "Canceled" state. Reset the state to "Idle".
m_state = STATE_IDLE;
} else if (m_state == STATE_FINISHED || m_state == STATE_CANCELED) {
// In the "Finished" or "Canceled" state. Reset the state to "Idle".
m_state = STATE_IDLE;
}
this->m_output_path.clear();
return true;
}
// Apply config over the print. Returns false, if the new config values caused any of the already
// processed steps to be invalidated, therefore the task will need to be restarted.
bool BackgroundSlicingProcess::apply_config(const DynamicPrintConfig &config)
{
this->stop();
bool invalidated = m_print->apply_config(config);
return invalidated;
}
}; // namespace Slic3r
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