MEMORY_MAPPED_FILE Class Reference

#include </builds/gaudi/Gaudi/GaudiKernel/src/Util/LibSymbolInfo.h>

Public Member Functions
	MEMORY_MAPPED_FILE (PSTR pszFileName)
	~MEMORY_MAPPED_FILE (void)
PVOID	GetBase (void)
DWORD	GetFileSize (void)
BOOL	IsValid (void)
errMMF	GetErrorType ()

Private Attributes
HANDLE	m_hFile
HANDLE	m_hFileMapping
PVOID	m_pMemoryMappedFileBase
DWORD	m_cbFile
errMMF	m_errCode

Detailed Description

Definition at line 44 of file LibSymbolInfo.h.

Constructor & Destructor Documentation

MEMORY_MAPPED_FILE()

MEMORY_MAPPED_FILE::MEMORY_MAPPED_FILE

(

PSTR

pszFileName

)

Definition at line 181 of file LibSymbolInfo.cpp.

                                                         {
 
  //
  // Given a filename, the constructor opens a file handle, creates a file
  // mapping, and maps the entire file into memory.
  //
  m_hFile                 = INVALID_HANDLE_VALUE;
  m_hFileMapping          = 0;
  m_pMemoryMappedFileBase = 0;
  m_cbFile                = 0;
  m_errCode               = errMMF_FileOpen; // Initial error code: not found
                                             // First get a file handle
  m_hFile =
      CreateFile( pszFileName, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, (HANDLE)0 );
 
  if ( m_hFile == INVALID_HANDLE_VALUE ) {
    m_errCode = errMMF_FileOpen;
    return;
  }
  m_cbFile = ::GetFileSize( m_hFile, 0 );
  // Now, create a file mapping
  m_hFileMapping = CreateFileMapping( m_hFile, NULL, PAGE_READONLY, 0, 0, NULL );
  if ( m_hFileMapping == 0 ) {
    // Oops.  Something went wrong.  Clean up.
    CloseHandle( m_hFile );
    m_hFile   = INVALID_HANDLE_VALUE;
    m_errCode = errMMF_FileMapping;
    return;
  }
  m_pMemoryMappedFileBase = (PCHAR)MapViewOfFile( m_hFileMapping, FILE_MAP_READ, 0, 0, 0 );
  if ( m_pMemoryMappedFileBase == 0 ) {
    // Oops.  Something went wrong.  Clean up.
    CloseHandle( m_hFileMapping );
    m_hFileMapping = 0;
    CloseHandle( m_hFile );
    m_hFile   = INVALID_HANDLE_VALUE;
    m_errCode = errMMF_MapView;
    return;
  }
  m_errCode = errMMF_NoError;
}

~MEMORY_MAPPED_FILE()

MEMORY_MAPPED_FILE::~MEMORY_MAPPED_FILE

(

void

)

Definition at line 223 of file LibSymbolInfo.cpp.

                                              {
  // Clean up everything that was created by the constructor
  if ( m_pMemoryMappedFileBase ) UnmapViewOfFile( m_pMemoryMappedFileBase );
 
  if ( m_hFileMapping ) CloseHandle( m_hFileMapping );
 
  if ( m_hFile != INVALID_HANDLE_VALUE ) CloseHandle( m_hFile );
 
  m_errCode = errMMF_FileOpen;
}

Member Function Documentation

GetBase()

PVOID MEMORY_MAPPED_FILE::GetBase ( void  )

inline

Definition at line 49 of file LibSymbolInfo.h.

{ return m_pMemoryMappedFileBase; }

GetErrorType()

errMMF MEMORY_MAPPED_FILE::GetErrorType ( )

inline

Definition at line 52 of file LibSymbolInfo.h.

{ return m_errCode; }

GetFileSize()

DWORD MEMORY_MAPPED_FILE::GetFileSize ( void  )

inline

Definition at line 50 of file LibSymbolInfo.h.

{ return m_cbFile; }

IsValid()

BOOL MEMORY_MAPPED_FILE::IsValid ( void  )

inline

Definition at line 51 of file LibSymbolInfo.h.

{ return errMMF_NoError == m_errCode; }

Member Data Documentation

m_cbFile

DWORD MEMORY_MAPPED_FILE::m_cbFile

private

Definition at line 58 of file LibSymbolInfo.h.

m_errCode

errMMF MEMORY_MAPPED_FILE::m_errCode

private

Definition at line 59 of file LibSymbolInfo.h.

m_hFile

HANDLE MEMORY_MAPPED_FILE::m_hFile

private

Definition at line 55 of file LibSymbolInfo.h.

m_hFileMapping

HANDLE MEMORY_MAPPED_FILE::m_hFileMapping

private

Definition at line 56 of file LibSymbolInfo.h.

m_pMemoryMappedFileBase

PVOID MEMORY_MAPPED_FILE::m_pMemoryMappedFileBase

private

Definition at line 57 of file LibSymbolInfo.h.

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The documentation for this class was generated from the following files:

• GaudiKernel/src/Util/LibSymbolInfo.h
• GaudiKernel/src/Util/LibSymbolInfo.cpp