Re: Lockless file reading

[Bernd Eckenfels]

In article <20030828121823.GB6800@xxxxxxxxxxxxxxxxxx> you wrote:
> The kernel does not provide synchronisation between read() and write()
> data transfers, and it does not always use atomic 32-bit reads and
> writes either.

There are some gurantees for pipes, for example. Writes which are smaller
than pathconf(_PC_PIPE_BUF, pipe) will be atomic, i.e. not mixed between
multiple writers. I dont know what the gurantee for write/read or mmap is.

Greetings
Bernd
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