multithreading - My program hangs on pthread_rwlock_wrlock -

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i have 9-threaded program hangs after sometime on pthread_rwlock_wrlock

pthread_rwlock_wrlock(p_lock) write(file_handler, buff, len); pthread_rwlock_unlock(p_lock);

after sometimes, program hangs , threads found blocked lock. however, same program seems working fine when replaced rwlock mutex.


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