pthread_rwlock_wrlock
=====================

POSIX specification: http://www.opengroup.org/susv3xsh/pthread_rwlock_wrlock.html

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: HP-UX 11, OSF/1 4.0, Solaris 2.6, mingw, BeOS.