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#pragma once
#include <util/generic/noncopyable.h>
#include <util/system/defaults.h>
#include <memory>
#include "allocator.h"
namespace NNetlibaSocket {
constexpr int UDP_MAX_PACKET_SIZE = 8900;
class TUdpHostRecvBufAlloc;
struct TUdpRecvPacket: public TWithCustomAllocator {
friend class TUdpHostRecvBufAlloc;
int DataStart = 0, DataSize = 0;
std::shared_ptr<char> Data;
private:
int ArraySize_ = 0;
};
///////////////////////////////////////////////////////////////////////////////
class TUdpHostRecvBufAlloc: public TNonCopyable {
private:
mutable TUdpRecvPacket* RecvPktBuf;
static TUdpRecvPacket* Alloc() {
return new TUdpRecvPacket();
}
public:
static TUdpRecvPacket* Create(const int dataSize) {
TUdpRecvPacket* result = Alloc();
result->Data.reset(TCustomAllocator<char>().allocate(dataSize), [=](char* p) { TCustomAllocator<char>().deallocate(p, dataSize); }, TCustomAllocator<char>());
result->ArraySize_ = dataSize;
return result;
}
void SetNewPacket() const {
RecvPktBuf = CreateNewPacket();
}
public:
static TUdpRecvPacket* CreateNewSmallPacket(int dataSize) {
return Create(dataSize);
}
static TUdpRecvPacket* CreateNewPacket() {
return Create(UDP_MAX_PACKET_SIZE);
}
static TUdpRecvPacket* Clone(const TUdpRecvPacket* pkt) {
TUdpRecvPacket* result = Alloc();
result->DataStart = pkt->DataStart;
result->DataSize = pkt->DataSize;
result->Data = pkt->Data;
result->ArraySize_ = pkt->ArraySize_;
return result;
}
TUdpHostRecvBufAlloc() {
SetNewPacket();
}
~TUdpHostRecvBufAlloc() {
delete RecvPktBuf;
}
TUdpRecvPacket* ExtractPacket() {
TUdpRecvPacket* res = RecvPktBuf;
SetNewPacket();
return res;
}
int GetBufSize() const {
return RecvPktBuf->ArraySize_;
}
char* GetDataPtr() const {
return RecvPktBuf->Data.get();
}
};
}
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