pthread_mutex_call blocks forever ->cpu load 100%

pthread_mutex_lock() call never returns causing other threads to wait

for gaining its lock forever in turn causing 100% cpu load. I have tried

using alternate call pthread_mutex_trylock() which try to lock and if the

mutex is locked in some other thread it returns with an error code.

The above mentioned call pthread_mutex_lock is used in an application which

goes to full cpu load once mutex blocks forever, and even if i kill the application

and restart it, it will again go to full cpu load, the problem of full cpu load only gets

resolved when i restart the machine, is there any other alternate call or any other

possible solution for this problem.