Re: Error handling/ multi-threading question

[Andy H. <an...@jt...>]

The quote from the user guide is,

"To communicate errors reliably and support multi-threading, [icu] uses an
error code parameter mechanism..."

C++ Exceptions will work reliably in multi-threaded environments.

Using an error code parameter rather than exceptions in ICU lets the C and
C++ APIs share the same common error reporting mechanism.  Also, ICU dates
back to an era when exception support wasn't always reliable in C++
compilers.

Reporting errors via a global variable (like errno) does not work in
multi-threaded environments, and this is probably the source of the comment
regarding support for multithreading by use of an error code parameter.

  -- Andy Heninger
     hen...@us...

----- Original Message -----
From: "Jörg Kaufmann" <Joe...@at...>
To: <ic...@ww...>
Sent: Wednesday, January 16, 2002 7:27 AM
Subject: Error handling/ multi-threading question


> Hi,
> while reading the actual user guide, I found a short hint (page 35) that
> error code parameter mechanism (instead of C++ exceptions) is used to
> support multi-threading.
> Do I missunderstand this section and there is no problem with
> exceptions/MT or is there any problem I cannot see? (old compiler
> support is another really good argument)
> Actually I think, there's no problem to use exceptions and threads in my
> programs. A short explanation would be fine.
>
>
> Thanks in advance,
> Joerg Kaufmann