116 lines
2.5 KiB
C
116 lines
2.5 KiB
C
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// VMBuffer.h -- Copied from the PDC sample application
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// by Ron Murray
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// 15 December 1992
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#ifndef __VMBUFFER_H__
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#define __VMBUFFER_H__
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// Macro definitions
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//
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//
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// Useful rounding macros when the rounding amount is always a
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// power of two.
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//
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#define ROUND_DOWN( Size, Amount ) ((DWORD)(Size) & ~((Amount) - 1))
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#define ROUND_UP( Size, Amount ) (((DWORD)(Size) + ((Amount) - 1)) & ~((Amount) - 1))
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//
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// Pseudo keywords for documentation purposes.
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//
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#define IN
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#define OUT
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#define OPTIONAL
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// CB_BUFFER_INCREMENT is the default increment by which a virtual buffer will be
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// grown when we get an access violation.
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#define CB_BUFFER_INCREMENT 0x00010000
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//
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// Determine if an argument is present by testing a value of NULL
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//
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#define ARGUMENT_PRESENT( ArgumentPointer ) (\
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(LPSTR)(ArgumentPointer) != (LPSTR)(NULL) )
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//
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// Calculate the address of the base of the structure given its type, and an
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// address of a field within the structure.
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//
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#define CONTAINING_RECORD( address, type, field ) ((type *)( \
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(PCHAR)(address) - \
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(PCHAR)(&((type *)0)->field)))
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//
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// Virtual Buffer data structure and function prototypes.
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//
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typedef struct _MY_VIRTUAL_BUFFER
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{
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LPVOID Base;
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ULONG PageSize;
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LPVOID CommitLimit;
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LPVOID ReserveLimit;
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BOOL fForceExceptions;
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} MY_VIRTUAL_BUFFER, *PMY_VIRTUAL_BUFFER;
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#ifdef _DEBUG
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#define CreateVirtualBuffer(Buffer, Commit, Reserve) _CreateVirtualBuffer(Buffer, Commit, Reserve, TRUE, __FILE__, __LINE__)
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BOOL
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_CreateVirtualBuffer(
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OUT PMY_VIRTUAL_BUFFER Buffer,
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IN DWORD CommitSize,
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IN DWORD ReserveSize = 0,
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BOOL fForceExceptions = TRUE,
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PSZ pszWhichFile = NULL,
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UINT iWhichLine = 0
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);
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#else // _DEBUG
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BOOL
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CreateVirtualBuffer(
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OUT PMY_VIRTUAL_BUFFER Buffer,
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IN DWORD CommitSize,
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IN DWORD ReserveSize = 0,
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BOOL fForceExceptions = TRUE
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);
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#endif // _DEBUG
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BOOL
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ExtendVirtualBuffer(
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IN PMY_VIRTUAL_BUFFER Buffer,
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IN LPVOID Address
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);
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BOOL
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TrimVirtualBuffer(
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IN PMY_VIRTUAL_BUFFER Buffer
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);
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BOOL
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FreeVirtualBuffer(
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IN PMY_VIRTUAL_BUFFER Buffer
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);
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int
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VirtualBufferExceptionFilter(
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IN DWORD ExceptionCode,
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IN PEXCEPTION_POINTERS ExceptionInfo,
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IN OUT PMY_VIRTUAL_BUFFER Buffer,
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IN UINT cbIncrement = CB_BUFFER_INCREMENT
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);
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#endif // __VMBUFFER_H__
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