DevOps, CI/CD and Automation

Hi Guys,
I have a problem with file locking on Solaris 5.6 with fstream. All of the file locking methods I know act on a file descriptor (flock,lockf, fcntl). In this particular scenario I got to use any C++ streams.

I'm particularly concerned with fstream filebuf flags. In Window NT Iam using filebuf::sh_none falg to prevent another process or thread from accessing the same file till I explicitly close the file.

I read some where, we can use filebuf::openprot on solaris. But If I use this openprot my Compiler(Work Shop 5.0) giving compilation error

Error: openprot is not a member of std::basic_filebuf<char, std::char_traits<<char>>.

So, if somebody can provide me with some other options about this it would be very helpful.

Any help greatly appreciated

Thanks