Member Avatar for johans22

I like to be able to modify the content of "pBuf" without modifying the content of the file. what would be the options, if that would be possible at all?.
pBuf = (LPTSTR) MapViewOfFile(hMapFile, // handle to map object
FILE_MAP_ALL_ACCESS, // read/write permission
highDWordVal,
lowDWordVal,
BUF_SIZE1); //BUF_SIZE);

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Member Avatar for vijayan121

You need to create a 'copy on write' view.

Open the file for read access: CreateFile( ...., GENERIC_READ, .... ) ; Create the FileMapping for read access: CreateFileMapping( ....., PAGE_READONLY, ..... ) ; Create a copy-on-write view: MapViewOfFile( ......, [b]FILE_MAP_COPY[/b], ..... ) ; Unix: mmap( ...., PROT_READ|PROT_WRITE, [b]MAP_PRIVATE[/b], .... ) ;

Member Avatar for johans22

hi,
Now , i need , to modify the content of buffer (pBuf) and the content of the mapped file. mapped file has to take and save the changes done to the buffr (pBuf). What would be the flags?.

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