PrusaSlicer-NonPlainar/src/libslic3r/PrintBase.hpp

304 lines
13 KiB
C++
Raw Normal View History

#ifndef slic3r_PrintBase_hpp_
#define slic3r_PrintBase_hpp_
#include "libslic3r.h"
#include <atomic>
#include <set>
#include <vector>
#include <string>
#include <functional>
#include "tbb/atomic.h"
// tbb/mutex.h includes Windows, which in turn defines min/max macros. Convince Windows.h to not define these min/max macros.
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include "tbb/mutex.h"
#include "Model.hpp"
#include "PrintConfig.hpp"
namespace Slic3r {
class CanceledException : public std::exception {
public:
const char* what() const throw() { return "Background processing has been canceled"; }
};
// To be instantiated over PrintStep or PrintObjectStep enums.
template <class StepType, size_t COUNT>
class PrintState
{
public:
PrintState() { for (size_t i = 0; i < COUNT; ++ i) m_state[i].store(INVALID, std::memory_order_relaxed); }
enum State {
INVALID,
STARTED,
DONE,
};
// With full memory barrier.
bool is_done(StepType step) const { return m_state[step] == DONE; }
// Set the step as started. Block on mutex while the Print / PrintObject / PrintRegion objects are being
// modified by the UI thread.
// This is necessary to block until the Print::apply_config() updates its state, which may
// influence the processing step being entered.
void set_started(StepType step, tbb::mutex &mtx) {
mtx.lock();
m_state[step].store(STARTED, std::memory_order_relaxed);
mtx.unlock();
}
// Set the step as done. Block on mutex while the Print / PrintObject / PrintRegion objects are being
// modified by the UI thread.
void set_done(StepType step, tbb::mutex &mtx) {
mtx.lock();
m_state[step].store(DONE, std::memory_order_relaxed);
mtx.unlock();
}
// Make the step invalid.
// The provided mutex should be locked at this point, guarding access to m_state.
// In case the step has already been entered or finished, cancel the background
// processing by calling the cancel callback.
template<typename CancelationCallback>
bool invalidate(StepType step, tbb::mutex &mtx, CancelationCallback cancel) {
bool invalidated = m_state[step].load(std::memory_order_relaxed) != INVALID;
if (invalidated) {
#if 0
if (mtx.state != mtx.HELD) {
printf("Not held!\n");
}
#endif
// Raise the mutex, so that the following cancel() callback could cancel
// the background processing.
mtx.unlock();
cancel();
m_state[step] = INVALID;
mtx.lock();
}
return invalidated;
}
template<typename CancelationCallback, typename StepTypeIterator>
bool invalidate_multiple(StepTypeIterator step_begin, StepTypeIterator step_end, tbb::mutex &mtx, CancelationCallback cancel) {
bool invalidated = false;
for (StepTypeIterator it = step_begin; ! invalidated && it != step_end; ++ it)
invalidated = m_state[*it].load(std::memory_order_relaxed) != INVALID;
if (invalidated) {
#if 0
if (mtx.state != mtx.HELD) {
printf("Not held!\n");
}
#endif
// Raise the mutex, so that the following cancel() callback could cancel
// the background processing.
mtx.unlock();
cancel();
for (StepTypeIterator it = step_begin; it != step_end; ++ it)
m_state[*it] = INVALID;
mtx.lock();
}
return invalidated;
}
// Make all steps invalid.
// The provided mutex should be locked at this point, guarding access to m_state.
// In case any step has already been entered or finished, cancel the background
// processing by calling the cancel callback.
template<typename CancelationCallback>
bool invalidate_all(tbb::mutex &mtx, CancelationCallback cancel) {
bool invalidated = false;
for (size_t i = 0; i < COUNT; ++ i)
if (m_state[i].load(std::memory_order_relaxed) != INVALID) {
invalidated = true;
break;
}
if (invalidated) {
mtx.unlock();
cancel();
for (size_t i = 0; i < COUNT; ++ i)
m_state[i].store(INVALID, std::memory_order_relaxed);
mtx.lock();
}
return invalidated;
}
private:
std::atomic<State> m_state[COUNT];
};
class PrintBase;
class PrintObjectBase
{
protected:
virtual ~PrintObjectBase() {}
// Declared here to allow access from PrintBase through friendship.
static tbb::mutex& cancel_mutex(PrintBase *print);
static std::function<void()> cancel_callback(PrintBase *print);
};
/**
* @brief Printing involves slicing and export of device dependent instructions.
*
* Every technology has a potentially different set of requirements for
* slicing, support structures and output print instructions. The pipeline
* however remains roughly the same:
* slice -> convert to instructions -> send to printer
*
* The PrintBase class will abstract this flow for different technologies.
*
*/
class PrintBase
{
public:
PrintBase() { this->restart(); }
inline virtual ~PrintBase() {}
virtual PrinterTechnology technology() const noexcept = 0;
// Reset the print status including the copy of the Model / ModelObject hierarchy.
virtual void clear() = 0;
// The Print is empty either after clear() or after apply() over an empty model,
// or after apply() over a model, where no object is printable (all outside the print volume).
virtual bool empty() const = 0;
// Validate the print, return empty string if valid, return error if process() cannot (or should not) be started.
virtual std::string validate() const { return std::string(); }
enum ApplyStatus {
// No change after the Print::apply() call.
APPLY_STATUS_UNCHANGED,
// Some of the Print / PrintObject / PrintObjectInstance data was changed,
// but no result was invalidated (only data influencing not yet calculated results were changed).
APPLY_STATUS_CHANGED,
// Some data was changed, which in turn invalidated already calculated steps.
APPLY_STATUS_INVALIDATED,
};
virtual ApplyStatus apply(const Model &model, const DynamicPrintConfig &config) = 0;
virtual void process() = 0;
typedef std::function<void(int, const std::string&)> status_callback_type;
// Default status console print out in the form of percent => message.
void set_status_default() { m_status_callback = nullptr; }
// No status output or callback whatsoever, useful mostly for automatic tests.
void set_status_silent() { m_status_callback = [](int, const std::string&){}; }
// Register a custom status callback.
void set_status_callback(status_callback_type cb) { m_status_callback = cb; }
// Calls a registered callback to update the status, or print out the default message.
void set_status(int percent, const std::string &message) {
if (m_status_callback) m_status_callback(percent, message);
else printf("%d => %s\n", percent, message.c_str());
}
typedef std::function<void()> cancel_callback_type;
// Various methods will call this callback to stop the background processing (the Print::process() call)
// in case a successive change of the Print / PrintObject / PrintRegion instances changed
// the state of the finished or running calculations.
void set_cancel_callback(cancel_callback_type cancel_callback) { m_cancel_callback = cancel_callback; }
// Has the calculation been canceled?
enum CancelStatus {
// No cancelation, background processing should run.
NOT_CANCELED = 0,
// Canceled by user from the user interface (user pressed the "Cancel" button or user closed the application).
CANCELED_BY_USER = 1,
// Canceled internally from Print::apply() through the Print/PrintObject::invalidate_step() or ::invalidate_all_steps().
CANCELED_INTERNAL = 2
};
CancelStatus cancel_status() const { return m_cancel_status; }
// Has the calculation been canceled?
bool canceled() const { return m_cancel_status != NOT_CANCELED; }
// Cancel the running computation. Stop execution of all the background threads.
void cancel() { m_cancel_status = CANCELED_BY_USER; }
void cancel_internal() { m_cancel_status = CANCELED_INTERNAL; }
// Cancel the running computation. Stop execution of all the background threads.
void restart() { m_cancel_status = NOT_CANCELED; }
protected:
friend class PrintObjectBase;
tbb::mutex& cancel_mutex() { return m_cancel_mutex; }
std::function<void()> cancel_callback() { return m_cancel_callback; }
void call_cancell_callback() { m_cancel_callback(); }
// If the background processing stop was requested, throw CanceledException.
// To be called by the worker thread and its sub-threads (mostly launched on the TBB thread pool) regularly.
void throw_if_canceled() const { if (m_cancel_status) throw CanceledException(); }
private:
tbb::atomic<CancelStatus> m_cancel_status;
// Callback to be evoked regularly to update state of the UI thread.
status_callback_type m_status_callback;
// Callback to be evoked to stop the background processing before a state is updated.
cancel_callback_type m_cancel_callback = [](){};
// Mutex used for synchronization of the worker thread with the UI thread:
// The mutex will be used to guard the worker thread against entering a stage
// while the data influencing the stage is modified.
mutable tbb::mutex m_cancel_mutex;
};
template<typename PrintStepEnum, const size_t COUNT>
class PrintBaseWithState : public PrintBase
{
public:
bool is_step_done(PrintStepEnum step) const { return m_state.is_done(step); }
protected:
void set_started(PrintStepEnum step) { m_state.set_started(step, this->cancel_mutex()); throw_if_canceled(); }
void set_done(PrintStepEnum step) { m_state.set_done(step, this->cancel_mutex()); throw_if_canceled(); }
bool invalidate_step(PrintStepEnum step)
{ return m_state.invalidate(step, this->cancel_mutex(), this->cancel_callback()); }
template<typename StepTypeIterator>
bool invalidate_steps(StepTypeIterator step_begin, StepTypeIterator step_end)
{ return m_state.invalidate_multiple(step_begin, step_end, this->cancel_mutex(), this->cancel_callback()); }
bool invalidate_steps(std::initializer_list<PrintStepEnum> il)
{ return m_state.invalidate_multiple(il.begin(), il.end(), this->cancel_mutex(), this->cancel_callback()); }
bool invalidate_all_steps()
{ return m_state.invalidate_all(this->cancel_mutex(), this->cancel_callback()); }
private:
PrintState<PrintStepEnum, COUNT> m_state;
};
template<typename PrintType, typename PrintObjectStepEnum, const size_t COUNT>
class PrintObjectBaseWithState : public PrintObjectBase
{
public:
Print* print() { return m_print; }
const Print* print() const { return m_print; }
bool is_step_done(PrintObjectStepEnum step) const { return m_state.is_done(step); }
protected:
PrintObjectBaseWithState(PrintType *print) : m_print(print) {}
void set_started(PrintObjectStepEnum step) { m_state.set_started(step, PrintObjectBase::cancel_mutex(m_print)); }
void set_done(PrintObjectStepEnum step) { m_state.set_done(step, PrintObjectBase::cancel_mutex(m_print)); }
bool invalidate_step(PrintObjectStepEnum step)
{ return m_state.invalidate(step, PrintObjectBase::cancel_mutex(m_print), PrintObjectBase::cancel_callback(m_print)); }
template<typename StepTypeIterator>
bool invalidate_steps(StepTypeIterator step_begin, StepTypeIterator step_end)
{ return m_state.invalidate_multiple(step_begin, step_end, PrintObjectBase::cancel_mutex(m_print), PrintObjectBase::cancel_callback(m_print)); }
bool invalidate_steps(std::initializer_list<PrintObjectStepEnum> il)
{ return m_state.invalidate_multiple(il.begin(), il.end(), PrintObjectBase::cancel_mutex(m_print), PrintObjectBase::cancel_callback(m_print)); }
bool invalidate_all_steps() { return m_state.invalidate_all(PrintObjectBase::cancel_mutex(m_print), PrintObjectBase::cancel_callback(m_print)); }
protected:
friend PrintType;
PrintType *m_print;
private:
PrintState<PrintObjectStepEnum, COUNT> m_state;
};
} // namespace Slic3r
#endif /* slic3r_PrintBase_hpp_ */