60 lines
979 B
C++
60 lines
979 B
C++
// RdWrt.h
|
|
#pragma once
|
|
|
|
#ifndef _READWRITE_H_
|
|
#define _READWRITE_H_
|
|
|
|
// this class handles a single-writer, multi-reader threading model
|
|
|
|
class CReadWrite
|
|
{
|
|
public:
|
|
CReadWrite();
|
|
~CReadWrite();
|
|
|
|
void EnterReader();
|
|
void ExitReader();
|
|
void EnterWriter();
|
|
void ExitWriter();
|
|
|
|
private:
|
|
HANDLE m_hevtNoReaders;
|
|
HANDLE m_hmtxWriter;
|
|
HANDLE m_handles[2];
|
|
LONG m_cReaders;
|
|
};
|
|
|
|
class CReader
|
|
{
|
|
public:
|
|
CReader( CReadWrite& rw )
|
|
: m_rrw( rw )
|
|
{
|
|
m_rrw.EnterReader();
|
|
}
|
|
~CReader()
|
|
{
|
|
m_rrw.ExitReader();
|
|
}
|
|
private:
|
|
CReadWrite& m_rrw;
|
|
};
|
|
|
|
class CWriter
|
|
{
|
|
public:
|
|
CWriter( CReadWrite& rw )
|
|
: m_rrw( rw )
|
|
{
|
|
m_rrw.EnterWriter();
|
|
}
|
|
~CWriter()
|
|
{
|
|
m_rrw.ExitWriter();
|
|
}
|
|
private:
|
|
CReadWrite& m_rrw;
|
|
};
|
|
|
|
#endif
|