(please excuse the double post but I wanted to reach the two audiences I
thought could help the best)
This is a question about the interpreting the documentation in the manual
for the C API.
I searched the list archives (all lists) going back 365 days for the terms
(unquoted): "mysql_real_connect thread" (I also looked for
alternatives:"mysql_real_connect threaded", "mysql_real_connect multi
threaded", etc.). I searched on Google Groups for: mysql_real_connect
thread and found a few interesting hits. However, I am still not 100%
clear on how to interpret some of the information on this page:
http://dev.mysql.com/doc/mysql/en/threaded-clients.html
I do a lot of MySQL administration and development using mostly the CLI
and a few other tools but I am writing a multithreaded client to automate
certain background processing and I need a bit of advice. According to the
page in question the function mysql_real_connect() is not "thread-safe".
Does that simply mean that I cannot call that function from more than one
thread at a time or does that mean that the connection created by one call
to the function will be visible to the other threads or what? Just how not
"thread-safe" is it?
Each thread will have it's own MYSQL structure and I will need to use two
different connections per thread at the same time (am I going to need a
separate call to mysql_init() for each connection?). I know how to wrap
all of my calls to mysql_real_connect() in a critical section or protect
them with a mutex if that's all I need to do . If it's not that simple and
I do need to compile and link against another library (as the page
suggests - sort of) can someone help me to configure my Microsoft Visual
C++ .NET (v7) to do it? I said "sort-of" because the page also says that
the binary distributions (which I am working with ) already contain the
threadsafe library so I wonder if I need to rebuild anything or not. How
can I tell?
I am an experienced but not well-seasoned C++ developer (not using c# for
this). I know the language and can write and debug code just fine (I can
make stand-alone apps and DLLs all day); it's just that some of the
complier/linker options and settings that confound me and I am having
trouble translating the advice on the page into specifics I can work with
for my environment.
I know I probably left out some simple pieces of information, just let me
know and I will respond ASAP. Please remember to CC: both lists on all
responses.
Shawn Green
Database Administrator
Unimin Corporation - Spruce Pine
