39 lines
1.3 KiB
C++
39 lines
1.3 KiB
C++
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//+-------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1992.
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//
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// File: lock.hxx
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//
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// Contents: Function definitions for remote exclusion functions
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//
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// History: 09-Mar-92 PhilipLa Created.
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//
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//--------------------------------------------------------------------------
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#ifndef __LOCK_HXX__
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#define __LOCK_HXX__
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#define NOLOCK 0x0
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SCODE GetAccess(ILockBytes *plst, DFLAGS df, ULONG *poReturn);
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void ReleaseAccess(ILockBytes *plst, DFLAGS df, ULONG offset);
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SCODE GetOpen(ILockBytes *plst, DFLAGS df, BOOL fCheck, ULONG *puReturn);
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void ReleaseOpen(ILockBytes *plst, DFLAGS df, ULONG offset);
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// For 32-bit builds we also provide a function that will repeatedly
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// attempt to get access locks for gracefully handling contention
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// Since waiting is virtually impossible in the 16-bit world, it doesn't
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// attempt it
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#if defined(FLAT)
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SCODE WaitForAccess(ILockBytes *plst, DFLAGS df, ULONG *poReturn);
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#else
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#define WaitForAccess(plst, df, poReturn) GetAccess(plst, df, poReturn)
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#endif
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#define IsInRangeLocks(iBegin, cbBuffer) \
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((iBegin + cbBuffer > OLOCKREGIONBEGIN) && \
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(iBegin <= OLOCKREGIONEND) )
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#endif // #ifndef __LOCK_HXX__
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