/sys$common/syshlp/helplib.hlb FORTRAN, Statements, Directive Statements, CONTEXT_SHARED  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  CPAR$ CONTEXT_SHARED var_name[,...,var_name]
  CPAR$ CONTEXT_SHARED_ALL

  CONTEXT_SHARED directives can be interspersed with declaration
  statements within program units in a parallel-processing
  application program.  Variables (scalars, arrays, and records)
  specified on a CONTEXT_SHARED directive reside in a shared memory
  location throughout any one invocation of a subprogram (subroutine
  or function), including any parallel loops contained within the
  subprogram.

  However, if a subprogram has several concurrent invocations
  (because it is called from within a parallel loop), each invocation
  will use different memory for these variables.  This context
  adjustment is handled automatically by the compiler and is not a
  programming consideration.

  By default, all variables in a routine compiled with the /PARALLEL
  qualifier are context-shared.

  Commas are required between variable names specified on a
  CONTEXT_SHARED directive.

  The CONTEXT_SHARED_ALL directive forces all symbols that are
  declared within a routine to default to CONTEXT_SHARED.  This
  directive affects only default behavior.  Individual symbols can
  still be declared PRIVATE.

  See your user manual for information about when to use directives
  to resolve certain types of data dependence problems.