Public Member Functions
PVOID	GetBase (void)

errMMF	GetErrorType ()

DWORD	GetFileSize (void)

BOOL	IsValid (void)

	MEMORY_MAPPED_FILE (PSTR pszFileName)

	~MEMORY_MAPPED_FILE (void)

Private Attributes
DWORD	m_cbFile

errMMF	m_errCode

HANDLE	m_hFile

HANDLE	m_hFileMapping

PVOID	m_pMemoryMappedFileBase

Detailed Description

Definition at line 79 of file genwindef.cc.

Constructor & Destructor Documentation

◆ MEMORY_MAPPED_FILE()

MEMORY_MAPPED_FILE::MEMORY_MAPPED_FILE ( PSTR pszFileName )

Definition at line 288 of file genwindef.cc.

                                                         {
 
   //
   // 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;
}

References errMMF_FileMapping, errMMF_FileOpen, errMMF_MapView, errMMF_NoError, GetFileSize(), m_cbFile, m_errCode, m_hFile, m_hFileMapping, and m_pMemoryMappedFileBase.

◆ ~MEMORY_MAPPED_FILE()

MEMORY_MAPPED_FILE::~MEMORY_MAPPED_FILE ( void )

Definition at line 334 of file genwindef.cc.

{
    // 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;
}