Description

   This routine initializes a condition variable (cond) with the
   Threads Library default condition variable attributes.

   A condition variable is a synchronization object used with a
   mutex. A mutex controls access to shared data. When threads are
   present, a condition variable allows threads to wait for data to
   enter a defined state.

   For more information about actions taken when threads are
   present, refer to the pthread_cond_init() description.

   Your program can use the macro PTHREAD_COND_INITIALIZER to
   initialize statically allocated condition variables to the
   default condition variable attributes. Static initialization
   can be used only for a condition variable with storage class
   "extern" or "static" - "automatic" (stack local) objects must
   be initialized by calling tis_cond_init(). Use this macro as
   follows:

      pthread_cond_t condition = PTHREAD_COND_INITIALIZER;

   When statically initialized, a condition variable should not also
   be initialized using tis_cond_init().