POSIX_Threads

   The POSIX Threads Library is VSI's multithreading run-time
   library package. It offers access to library routines via several
   interfaces. The Threads Library offers two primary interfaces:

   o  The PTHREAD multithreading interface is VSI's implementation
      of the IEEE POSIX 1003.1-1996 standard. Use this interface to
      build portable, multithreaded applications.

   o  The proprietary TIS interface offers routines that provide
      "thread-independent services." These routines allow a program
      to perform (or a library to offer) thread-safe processing that
      requires synchronization, but without requiring the use of
      threads.

   A thread is a single, sequential flow of control within a
   program. Use threads to improve a program's performance-that
   is, its throughput, computational speed, responsiveness, or some
   combination. Multiple threads are useful in a multiprocessor
   system, where a program's threads can run concurrently on
   separate processors. On single-processor systems, multiple
   threads can also improve a program's performance by permitting
   the overlap of input, output, or other slow operations with
   computational operations. For more information see the Guide
   to the POSIX Threads Library documentation.
 

Additional information available:

PTHREAD_routines                TIS_routines