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Using flat map instead of std::set, optimalization

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Jakub Melka
2018-11-25 17:57:39 +01:00
parent 89d4ee606b
commit 670a260265
8 changed files with 219 additions and 46 deletions
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31
PdfForQtLib/sources/pdfparser.h
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@@ -21,9 +21,9 @@
#include "pdfglobal.h"
#include "pdfobject.h"
#include "pdfflatmap.h"
#include <QtCore>
#include <QMutex>
#include <QVariant>
#include <QByteArray>
@@ -208,7 +208,11 @@ class PDFParsingContext
Q_DECLARE_TR_FUNCTIONS(pdf::PDFParsingContext)
public:
explicit PDFParsingContext() = default;
explicit PDFParsingContext(std::function<PDFObject(PDFParsingContext*, PDFObjectReference)> objectFetcher) :
m_objectFetcher(std::move(objectFetcher))
{
}
/// Guard guarding the cyclical references.
class PDFParsingContextGuard
@@ -233,34 +237,19 @@ public:
/// Returns dereferenced object, if object is a reference. If it is not a reference,
/// then same object is returned.
PDFObject getObject(const PDFObject& object) const;
/// Sets function which provides object fetching
void setObjectFetcher(std::function<PDFObject(PDFObjectReference)> objectFetcher) { m_objectFetcher = std::move(objectFetcher); }
PDFObject getObject(const PDFObject& object);
private:
void beginParsingObject(PDFObjectReference reference);
void endParsingObject(PDFObjectReference reference);
struct Key
{
constexpr inline Key() = default;
constexpr inline Key(Qt::HANDLE threadContext, PDFObjectReference reference) : threadContext(threadContext), reference(reference) { }
Qt::HANDLE threadContext = nullptr;
PDFObjectReference reference;
inline bool operator<(const Key& other) const { return std::tie(threadContext, reference) < std::tie(other.threadContext, other.reference); }
};
using KeySet = PDFFlatMap<PDFObjectReference, 2>;
/// This function fetches object, if it is needed
std::function<PDFObject(PDFObjectReference)> m_objectFetcher;
std::function<PDFObject(PDFParsingContext*, PDFObjectReference)> m_objectFetcher;
/// Set containing objects currently being parsed.
std::set<Key> m_activeParsedObjectSet;
/// Mutex protecting object for multiple thread access
QMutex m_mutex;
KeySet m_activeParsedObjectSet;
};
/// Class for parsing objects. Checks cyclical references. If