70 lines
1.9 KiB
Plaintext
70 lines
1.9 KiB
Plaintext
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//--------------------------------------------------------------------
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// AtomicInt64 - inline
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// Copyright (C) Microsoft Corporation, 1999
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//
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// Created by: Louis Thomas (louisth), 10-14-99
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//
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// Inlines to do atomic int64s
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// Suck these into a .cpp if you need them.
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//
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// This int64 can have multiple readers
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// and ONE writer, NOT MULTIPLE WRITERS.
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//
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//####################################################################
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//--------------------------------------------------------------------
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struct auint64 {
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private:
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volatile DWORD m_dwHi1;
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volatile DWORD m_dwLo;
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volatile DWORD m_dwHi2;
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public:
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//----------------------------------------------------------------
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unsigned __int64 getValue(void) {
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DWORD dwHi;
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DWORD dwLo;
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do {
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dwHi=m_dwHi1;
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dwLo=m_dwLo;
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} while (dwHi!=m_dwHi2);
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return (((unsigned __int64)dwHi)<<32)+dwLo;
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}
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//----------------------------------------------------------------
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void setValue(unsigned __int64 qw) {
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m_dwHi1=(DWORD)(qw>>32);
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m_dwLo= (DWORD) qw;
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m_dwHi2=(DWORD)(qw>>32);
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}
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};
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//####################################################################
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//--------------------------------------------------------------------
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struct asint64 {
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private:
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volatile DWORD m_dwHi1;
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volatile DWORD m_dwLo;
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volatile DWORD m_dwHi2;
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public:
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//----------------------------------------------------------------
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signed __int64 getValue(void) {
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DWORD dwHi;
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DWORD dwLo;
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do {
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dwHi=m_dwHi1;
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dwLo=m_dwLo;
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} while (dwHi!=m_dwHi2);
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return (signed __int64)((((unsigned __int64)dwHi)<<32)+dwLo);
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}
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//----------------------------------------------------------------
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void setValue(signed __int64 qw) {
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m_dwHi1=(DWORD)(((unsigned __int64)qw)>>32);
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m_dwLo= (DWORD) ((unsigned __int64)qw);
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m_dwHi2=(DWORD)(((unsigned __int64)qw)>>32);
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}
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};
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