How to implement File locking for fstream class object

[Ajay Bansal]

Hi,

I am using fstream in my application. I need to implement locking on my
file. Earlier fd method of filebuf class was available which gave me
filedescriptor. That file descriptor can be used by lockf or fcntl
system calls to implement file locking. How do I achive file locking
using me fstream object now?????

Following is the code snipet used for locking the file:

fcntl(m_file.rdbuf()->fd(), F_SETFD, FD_CLOEXEC);

How can achive the above functionality(file locking) on gcc 3.2.1????


Kindly advise,
Ajay