46 lines
1022 B
C++
46 lines
1022 B
C++
#include "progress.h"
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#include <mutex>
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using std::string;
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ProgressForwarder::ProgressForwarder(std::function<void(double progress)> callback) :
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callback(callback)
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{}
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void ProgressForwarder::reportProgress(double value) {
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callback(value);
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}
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ProgressMerger::ProgressMerger(ProgressSink& sink) :
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sink(sink)
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{}
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ProgressSink& ProgressMerger::addSink(double weight) {
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std::lock_guard<std::mutex> lock(mutex);
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totalWeight += weight;
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int sinkIndex = weightedValues.size();
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weightedValues.push_back(0);
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forwarders.push_back(ProgressForwarder([weight, sinkIndex, this](double progress) {
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weightedValues[sinkIndex] = progress * weight;
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report();
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}));
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return forwarders.back();
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}
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void ProgressMerger::report() {
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std::lock_guard<std::mutex> lock(mutex);
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if (totalWeight != 0) {
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double weightedSum = 0;
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for (double weightedValue : weightedValues) {
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weightedSum += weightedValue;
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}
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double progress = weightedSum / totalWeight;
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sink.reportProgress(progress);
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} else {
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sink.reportProgress(0);
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}
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}
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