NAME="sect2">Description</A></H2>
<P><B>pthread_sigmask</B> changes the signal mask for the calling
thread as described by the <I>how</I> and <I>newmask</I> arguments.
If <I>oldmask</I> is not <B>NULL</B>, the previous signal mask is
stored in the location pointed to by <I>oldmask</I>. <B>pthreads-win32</B>
implements this function but no other function uses the signal mask
yet.</P>
<P>The meaning of the <I>how</I> and <I>newmask</I> arguments is the
same as for <B><SPAN STYLE="font-style: normal">sigprocma