Pthread_mutex_lock return value 22 Pthread_mutex_lock return error return value : 22. What are the causes of errors. Note : in the sun solaris8 procedures not being given below. Ibm aix transplanted to return under pthread_mutex_lock wrong.       Multithreading is the standard pthread_mutex_lock Secretary ah. Pthread_mutex_lock return value 22 Errno 22 invalid parameter is the meaning, you look at the usage pthread_mutex_lock function, the manual describes MAN : EINVAL The value specified by mutex does not refer to an initialised mutex object. show that you do not correct the mutex object initialization. [ Closed window ]