+diff -Nru asterisk-1.6.1.0.org/configure asterisk-1.6.1.0/configure
+--- asterisk-1.6.1.0.org/configure 2009-03-19 19:14:55.000000000 +0100
++++ asterisk-1.6.1.0/configure 2009-05-01 16:20:40.000000000 +0200
+@@ -16790,6 +16790,70 @@
+ rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
+ conftest$ac_exeext conftest.$ac_ext
+
++{ echo "$as_me:$LINENO: checking for pthread_rwlock_timedwrlock() in pthread.h" >&5
++echo $ECHO_N "checking for pthread_rwlock_timedwrlock() in pthread.h... $ECHO_C" >&6; }
++cat >conftest.$ac_ext <<_ACEOF
++/* confdefs.h. */
++_ACEOF
++cat confdefs.h >>conftest.$ac_ext
++cat >>conftest.$ac_ext <<_ACEOF
++/* end confdefs.h. */
++#include <pthread.h>
++ #include <time.h>
++int
++main ()
++{
++pthread_rwlock_t foo; struct timespec bar; pthread_rwlock_timedwrlock(&foo, &bar)
++ ;
++ return 0;
++}
++
++_ACEOF
++rm -f conftest.$ac_objext conftest$ac_exeext
++if { (ac_try="$ac_link"
++case "(($ac_try" in
++ *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
++ *) ac_try_echo=$ac_try;;
++esac
++eval "echo \"\$as_me:$LINENO: $ac_try_echo\"") >&5
++ (eval "$ac_link") 2>conftest.er1
++ ac_status=$?
++ grep -v '^ *+' conftest.er1 >conftest.err
++ rm -f conftest.er1
++ cat conftest.err >&5
++ echo "$as_me:$LINENO: \$? = $ac_status" >&5
++ (exit $ac_status); } && {
++ test -z "$ac_c_werror_flag" ||
++ test ! -s conftest.err
++ } && test -s conftest$ac_exeext &&
++ $as_test_x conftest$ac_exeext; then
++
++ { echo "$as_me:$LINENO: result: yes" >&5
++echo "${ECHO_T}yes" >&6; }
++ ac_cv_pthread_rwlock_timedwrlock="yes"
++
++else
++ echo "$as_me: failed program was:" >&5
++sed 's/^/| /' conftest.$ac_ext >&5
++
++
++ { echo "$as_me:$LINENO: result: no" >&5
++echo "${ECHO_T}no" >&6; }
++ ac_cv_pthread_rwlock_timedwrlock="no"
++
++
++fi
++
++rm -f core conftest.err conftest.$ac_objext conftest_ipa8_conftest.oo \
++ conftest$ac_exeext conftest.$ac_ext
++if test "${ac_cv_pthread_rwlock_timedwrlock}" = "yes"; then
++
++cat >>confdefs.h <<\_ACEOF
++#define HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK 1
++_ACEOF
++
++fi
++
+
+ if test "x${PBX_PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP}" != "x1"; then
+ { echo "$as_me:$LINENO: checking for PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP in pthread.h" >&5
+diff -Nru asterisk-1.6.1.0.org/configure.ac asterisk-1.6.1.0/configure.ac
+--- asterisk-1.6.1.0.org/configure.ac 2009-03-19 19:14:55.000000000 +0100
++++ asterisk-1.6.1.0/configure.ac 2009-05-01 16:20:40.000000000 +0200
+@@ -437,6 +437,24 @@
+ AC_MSG_RESULT(no)
+ )
+
++AC_MSG_CHECKING(for pthread_rwlock_timedwrlock() in pthread.h)
++AC_LINK_IFELSE(
++ [AC_LANG_PROGRAM(
++ [#include <pthread.h>
++ #include <time.h>],
++ [pthread_rwlock_t foo; struct timespec bar; pthread_rwlock_timedwrlock(&foo, &bar)])
++ ],[
++ AC_MSG_RESULT(yes)
++ ac_cv_pthread_rwlock_timedwrlock="yes"
++ ],[
++ AC_MSG_RESULT(no)
++ ac_cv_pthread_rwlock_timedwrlock="no"
++ ]
++)
++if test "${ac_cv_pthread_rwlock_timedwrlock}" = "yes"; then
++ AC_DEFINE([HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK], 1, [Define if your system has pthread_rwlock_timedwrlock()])
++fi
++
+ AST_C_DEFINE_CHECK([PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP], [PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP], [pthread.h])
+
+ #if test "${cross_compiling}" = "no";
+diff -Nru asterisk-1.6.1.0.org/include/asterisk/autoconfig.h.in asterisk-1.6.1.0/include/asterisk/autoconfig.h.in
+--- asterisk-1.6.1.0.org/include/asterisk/autoconfig.h.in 2009-03-19 19:14:55.000000000 +0100
++++ asterisk-1.6.1.0/include/asterisk/autoconfig.h.in 2009-05-01 16:20:40.000000000 +0200
+@@ -647,6 +647,9 @@
+ pthread.h */
+ #undef HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NP
+
++/* Define if your system has pthread_rwlock_timedwrlock() */
++#undef HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK
++
+ /* Define to 1 if the system has the type `ptrdiff_t'. */
+ #undef HAVE_PTRDIFF_T
+
+diff -Nru asterisk-1.6.1.0.org/include/asterisk/lock.h asterisk-1.6.1.0/include/asterisk/lock.h
+--- asterisk-1.6.1.0.org/include/asterisk/lock.h 2009-04-10 05:56:37.000000000 +0200
++++ asterisk-1.6.1.0/include/asterisk/lock.h 2009-05-01 16:20:40.000000000 +0200
+@@ -49,10 +49,15 @@
+ #define _ASTERISK_LOCK_H
+
+ #include <pthread.h>
++#include <time.h>
+ #include <sys/param.h>
+ #ifdef HAVE_BKTR
+ #include <execinfo.h>
+ #endif
++
++#ifndef HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK
++#include "asterisk/time.h"
++#endif
+ #include "asterisk/logger.h"
+
+ /* internal macro to profile mutexes. Only computes the delay on
+@@ -1395,7 +1400,23 @@
+ ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t);
+ #endif
+ }
++#ifdef HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK
+ res = pthread_rwlock_timedrdlock(&t->lock, abs_timeout);
++#else
++ do {
++ struct timeval _start = ast_tvnow(), _diff;
++ for (;;) {
++ if (!(res = pthread_rwlock_tryrdlock(&t->lock))) {
++ break;
++ }
++ _diff = ast_tvsub(ast_tvnow(), _start);
++ if (_diff.tv_sec > abs_timeout->tv_sec || (_diff.tv_sec == abs_timeout->tv_sec && _diff.tv_usec * 1000 > abs_timeout->tv_nsec)) {
++ break;
++ }
++ usleep(1);
++ }
++ } while (0);
++#endif
+ if (!res) {
+ ast_reentrancy_lock(lt);
+ if (lt->reentrancy < AST_MAX_REENTRANCY) {
+@@ -1474,7 +1495,23 @@
+ ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t);
+ #endif
+ }
++#ifdef HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK
+ res = pthread_rwlock_timedwrlock(&t->lock, abs_timeout);
++#else
++ do {
++ struct timeval _start = ast_tvnow(), _diff;
++ for (;;) {
++ if (!(res = pthread_rwlock_trywrlock(&t->lock))) {
++ break;
++ }
++ _diff = ast_tvsub(ast_tvnow(), _start);
++ if (_diff.tv_sec > abs_timeout->tv_sec || (_diff.tv_sec == abs_timeout->tv_sec && _diff.tv_usec * 1000 > abs_timeout->tv_nsec)) {
++ break;
++ }
++ usleep(1);
++ }
++ } while (0);
++#endif
+ if (!res) {
+ ast_reentrancy_lock(lt);
+ if (lt->reentrancy < AST_MAX_REENTRANCY) {
+@@ -1762,7 +1799,23 @@
+
+ static inline int ast_rwlock_timedrdlock(ast_rwlock_t *prwlock, const struct timespec *abs_timeout)
+ {
+- return pthread_rwlock_timedrdlock(prwlock, abs_timeout);
++ int res;
++#ifdef HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK
++ res = pthread_rwlock_timedrdlock(prwlock, abs_timeout);
++#else
++ struct timeval _start = ast_tvnow(), _diff;
++ for (;;) {
++ if (!(res = pthread_rwlock_tryrdlock(prwlock))) {
++ break;
++ }
++ _diff = ast_tvsub(ast_tvnow(), _start);
++ if (_diff.tv_sec > abs_timeout->tv_sec || (_diff.tv_sec == abs_timeout->tv_sec && _diff.tv_usec * 1000 > abs_timeout->tv_nsec)) {
++ break;
++ }
++ usleep(1);
++ }
++#endif
++ return res;
+ }
+
+ static inline int ast_rwlock_tryrdlock(ast_rwlock_t *prwlock)
+@@ -1777,7 +1830,25 @@
+
+ static inline int ast_rwlock_timedwrlock(ast_rwlock_t *prwlock, const struct timespec *abs_timeout)
+ {
+- return pthread_rwlock_timedwrlock(prwlock, abs_timeout);
++ int res;
++#ifdef HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK
++ res = pthread_rwlock_timedwrlock(prwlock, abs_timeout);
++#else
++ do {
++ struct timeval _start = ast_tvnow(), _diff;
++ for (;;) {
++ if (!(res = pthread_rwlock_trywrlock(prwlock))) {
++ break;
++ }
++ _diff = ast_tvsub(ast_tvnow(), _start);
++ if (_diff.tv_sec > abs_timeout->tv_sec || (_diff.tv_sec == abs_timeout->tv_sec && _diff.tv_usec * 1000 > abs_timeout->tv_nsec)) {
++ break;
++ }
++ usleep(1);
++ }
++ } while (0);
++#endif
++ return res;
+ }
+
+ static inline int ast_rwlock_trywrlock(ast_rwlock_t *prwlock)