Re: [Boost-users] ASIO async IO, will the buffer corrupt?

Subject: Re: [Boost-users] ASIO async IO, will the buffer corrupt?
From: Rutger ter Borg (rutger_at_[hidden])
Date: 2010-05-21 05:55:56

Lloyd wrote:

> Hello,
>   we are trying to write a high performane storage server. For that we are
>   using Aynchronous IO with boost::asio. The data will be received at the
>   storage server with the help of boost::asio::async_read(), and the data
>   will be written to the storage with boost::asio::async_write() in the
>   asyn_read() completion handler. Here we are planning to share the data
>   buffer. The async read will be running in a loop, so if the write is not
>   completed and if the next async_read() attempts to access the buffer, 
>   will the buffer be corrupted?

Yes.

> 
> If we use seperate buffer for each async_read()+async_write() operation,
> wouldn't it be inefficient?
> 

It's as efficient, it only takes more memory. What happens if the reads go 
faster than the writes? It sounds like you use a typical producer/consumer 
pattern and could use off-the-shelf solutions for that, like, e.g., a 
circular buffer.

Cheers,

Rutger