Subj : redhat linux standard C library does not have pthread_mutex_trylock ???
To   : comp.programming.threads
From : outsiderjustice
Date : Mon Feb 07 2005 06:34 am

Hi All,

I have developed a general library that is MT safe and used standard
Pthread calls, this library can be used in both MT programs (link with
-lpthread) or single thread programs (without
-lpthread, the standard C library provided the dummy implementation for
the pthread functions), this works fine on Solaris; however, when we
are porting the system onto Linux (redhat), we got a problem because
the standard C library does not have pthread_mutex_trylock defined
(while all the other pthread_mutex_xxx functions are defined), this has
forced us to link -lpthread with all the programs, even though the
program is only meant to be single thread application.

Now the questions are:

- Does someone know such a list of pthread functions not defined in the
standard C library?
- Is this a problem or a feathure of Linux? (I'm quite new to Linux
development) I tried several versions they all have this same issue. If
it's a problem, what's the well-known solution?
- What's the overhead of linking a single thread app with -lpthread
(thus forced it to be MT even though there's only one user thread)?
- Does Linux encourage people to develop MT applications?

Thanks a lot.

- OJ

.