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/**************************************************************************/
/* */
/* Copyright (c) 2001, 2009 NoMachine, http://www.nomachine.com/. */
/* */
/* NXCOMP, NX protocol compression and NX extensions to this software */
/* are copyright of NoMachine. Redistribution and use of the present */
/* software is allowed according to terms specified in the file LICENSE */
/* which comes in the source distribution. */
/* */
/* Check http://www.nomachine.com/licensing.html for applicability. */
/* */
/* NX and NoMachine are trademarks of Medialogic S.p.A. */
/* */
/* All rights reserved. */
/* */
/**************************************************************************/
#ifndef SequenceQueue_H
#define SequenceQueue_H
//
// List of outstanding request messages which
// are waiting for a reply. This class is used
// in X client and server channels to correlate
// the replies sequence numbers to the original
// request type.
//
class SequenceQueue
{
public:
SequenceQueue();
virtual ~SequenceQueue();
void push(unsigned short int sequence, unsigned char opcode,
unsigned int data1 = 0, unsigned int data2 = 0,
unsigned int data3 = 0);
int peek(unsigned short int &sequence, unsigned char &opcode);
int peek(unsigned short int &sequence, unsigned char &opcode,
unsigned int &data1, unsigned int &data2,
unsigned int &data3);
int pop(unsigned short int &sequence, unsigned char &opcode,
unsigned int &data1, unsigned int &data2,
unsigned int &data3);
int pop(unsigned short int &sequence, unsigned char &opcode)
{
unsigned int data1, data2, data3;
return pop(sequence, opcode, data1, data2, data3);
}
int length()
{
return length_;
}
private:
struct RequestSequence
{
unsigned short int sequence;
unsigned char opcode;
unsigned int data1;
unsigned int data2;
unsigned int data3;
};
RequestSequence *queue_;
unsigned int size_;
unsigned int length_;
unsigned int start_;
unsigned int end_;
};
#endif /* SequenceQueue_H */
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