mirror of
https://github.com/vcmi/vcmi.git
synced 2024-12-26 22:57:00 +02:00
95 lines
2.2 KiB
C++
95 lines
2.2 KiB
C++
/*
|
|
* LoadProgress.h, part of VCMI engine
|
|
*
|
|
* Authors: listed in file AUTHORS in main folder
|
|
*
|
|
* License: GNU General Public License v2.0 or later
|
|
* Full text of license available in license.txt file, in main folder
|
|
*
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include "StdInc.h"
|
|
#include <atomic>
|
|
|
|
namespace Load
|
|
{
|
|
|
|
using Type = unsigned char;
|
|
|
|
class ProgressAccumulator;
|
|
|
|
/*
|
|
* Purpose of that class is to track progress of computations
|
|
* Derive from this class if you want to translate user or system
|
|
* remaining amount of work needed.
|
|
* Tracking of the progress should be from another thread.
|
|
*/
|
|
class DLL_LINKAGE Progress
|
|
{
|
|
public:
|
|
|
|
//Sets current state to 0.
|
|
//Amount of steps to finish progress will be equal to 100 for default constructor
|
|
Progress();
|
|
Progress(int steps);
|
|
virtual ~Progress() = default;
|
|
|
|
//Returns current state of the progress
|
|
//To translate it into percentage (to float, for example):
|
|
//float progress = <>.get() / std::numeric_limits<Load::Type>::max();
|
|
Type get() const;
|
|
|
|
//Returns true if current state equal to final state, false otherwise
|
|
bool finished() const;
|
|
|
|
//Sets current state equal to the argument
|
|
void set(Type);
|
|
|
|
//Sets current state to 0
|
|
//steps - amount of steps needed to reach final state
|
|
void reset(int steps = 100);
|
|
|
|
//Immediately sets state to final
|
|
//finished() will return true after calling this method
|
|
void finish();
|
|
|
|
//Sets amount of steps needed to reach final state
|
|
//doesn't modify current state
|
|
void setupSteps(int steps);
|
|
|
|
//Sets amount of steps needed to reach state specified
|
|
//doesn't modify current state
|
|
void setupStepsTill(int steps, Type state);
|
|
|
|
//Increases current state by steps count
|
|
//if current state reaches final state, returns immediately
|
|
void step(int count = 1);
|
|
|
|
private:
|
|
std::atomic<Type> _progress, _target;
|
|
std::atomic<int> _step, _maxSteps;
|
|
|
|
friend class ProgressAccumulator;
|
|
};
|
|
|
|
class DLL_LINKAGE ProgressAccumulator
|
|
{
|
|
public:
|
|
ProgressAccumulator() = default;
|
|
|
|
void include(const Progress &);
|
|
void exclude(const Progress &);
|
|
|
|
bool finished() const;
|
|
Type get() const;
|
|
|
|
private:
|
|
mutable boost::mutex _mx;
|
|
long long _accumulated = 0, _steps = 0;
|
|
std::vector<std::reference_wrapper<const Progress>> _progress;
|
|
};
|
|
|
|
}
|