Thread safe functions from the C standard library

[David Livshin]

Hi,

What functions from the GNU's C standard library ( libc ) are thread 
safe? Of a particular interest are transcendental functions ( like 
'exp', 'sin' etc. ) - are they thread safe?

Are there any requirements/guidelines/assurances regarding thread safety 
of functions from the  C library?

Thanks in advance.

--
David Livshin

http://www.dalsoft.com