Ruby interpreter thread safety

[Thomas Sondergaard]

I have a scenario where a ruby extension module starts real/os/heavy-weight
threads that may call back to ruby. As far as I understand the ruby
interpreter itself is not thread safe. How can I handle this thread-safety
problem?

Cheers,

Thomas

[nobu.nokada@softhome.net]

Hi,

At Thu, 4 Sep 2003 19:45:24 +0900,
Thomas Sondergaard wrote:

> I have a scenario where a ruby extension module starts real/os/heavy-weight
> threads that may call back to ruby. As far as I understand the ruby
> interpreter itself is not thread safe. How can I handle this thread-safety
> problem?

Run the ruby interpreter in a particular os-thread, and use
system provided queue.

--
Nobu Nakada

[Jim Weirich]

On Thu, 2003-09-04 at 06:45, Thomas Sondergaard wrote:

> I have a scenario where a ruby extension module starts real/os/heavy-weight
> threads that may call back to ruby. As far as I understand the ruby
> interpreter itself is not thread safe. How can I handle this thread-safety
> problem?

The general solution for any threaded code making calls to a non-thread
safe library is to do one of the following:

(a) Make calls into the library (callbacks in your case) from
only a single thread.
or (b) Serialize calls to the library by using a mutex of some type.

--
-- Jim Weirich [email]jweirich@one.net[/email] [url]http://onestepback.org[/url]
-----------------------------------------------------------------
"Beware of bugs in the above code; I have only proved it correct,
not tried it." -- Donald Knuth (in a memo to Peter van Emde Boas)

[Thomas Sondergaard]

> The general solution for any threaded code making calls to a non-thread

> safe library is to do one of the following:
>
> (a) Make calls into the library (callbacks in your case) from
> only a single thread.
> or (b) Serialize calls to the library by using a mutex of some type.

Got it!

Thomas

[Thomas Sondergaard]

> Run the ruby interpreter in a particular os-thread, and use
> system provided queue.

Could you give me an example of such a system provided queue?

Cheers,

Thomas