simultaneous file writing

[mvjohn100]

hello friends

how can I write into file :- the problem is, it wanted to be accessed same time by more than one user.... any solution using buffer or something like that........... .......... thanks

John

[gpraghuram]

hello friends

how can I write into file :- the problem is, it wanted to be accessed same time by more than one user.... any solution using buffer or something like that........... .......... thanks

John

i think you have to start using semaphores or mutex lock to acquire the lock and write to the file

Raghuram

[mvjohn100]

hello,

what about c++ "fstream" object. Is it handle the multiple access. I want to store the errors generated in the programs in a file; the errors may be from many threads....

thanks
john

[oler1s]

See http://msdn2.microsoft.com/en-us/lib...3b(VS.80).aspx. Your compiler should have a way of compiling a thread safe version of the C++ library.

[mvjohn100]

we using gcc in linux platform. Is this complier thread safe in default for C++ library. Is we want to add any options.....

Thanks
john

[Sick0Fant]

Look at shared memory. I believe linux has the shmget() function.