61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
#ifndef NXS_BORDERSERVER_H
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#define NXS_BORDERSERVER_H
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#include <list>
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#include <map>
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#include "index_file.h"
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#include "border.h"
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/*nell'header ci sta scritto solo:
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spazio riservato: 2 * sizeof(Link);
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magic: nxb0 (4 bytes)
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offset: (int64) */
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namespace nxs {
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struct BorderEntry {
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unsigned int start; //granuralita' Link
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unsigned short size; //in Links
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unsigned short used; //in Links
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Link *links;
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};
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class BorderServer: public IndexFile<BorderEntry> {
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public:
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BorderServer(): ram_max(1000000), ram_used(0) {}
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~BorderServer() { Close(); }
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bool Create(const std::string &file);
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bool Load(const std::string &file, bool readonly = true);
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void Close();
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void Flush();
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void AddBorder(unsigned short nbord, unsigned int used = 0);
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Border GetBorder(unsigned int border, bool flush = true);
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//return true if you need to reread border as it changed location
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bool ResizeBorder(unsigned int border, unsigned int nbord);
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unsigned int BorderSize(unsigned int i) {
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return operator[](i).used;
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}
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unsigned int BorderCapacity(unsigned int i) {
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return operator[](i).size;
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}
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protected:
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unsigned int ram_max;
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unsigned int ram_used;
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std::list<unsigned int> pqueue;
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std::map<unsigned int, std::list<unsigned int>::iterator> index;
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bool LoadHeader();
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void SaveHeader();
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void FlushBorder(unsigned int border);
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Link *GetRegion(unsigned int start, unsigned int size); //size in links.
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};
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}
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#endif
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