Is there any difference between 

pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;

Or

pthread_mutex_t lock;
pthread_mutex_init ( &lock, NULL);

Am I safe enough if I use only the first method ?

NOTE: My question mostly refers to very small programs where at the most what I'll do is connect several clients to a server and resolve their inquiries with worker threads.

c ubuntu pthreads mutex
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