Basic HTML version of Foils prepared August 7 98

Foil 23 The INDEPENDENT Directive:
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From DoD HPF Training -- 3. Parallel Constructs in HPF DoD Training and Others -- 1995-98. by Chuck Koelbel -- Rice University
The Fundamental Rule:
  • If one iteration writes to an object, others cannot read or write it
Things that write to an object:
  • Assignment, ASSIGN, DO index,
    • To the object itself
    • To an aggregate that contains it
    • Through a pointer to it
  • Input/Output statements
    • Write the file pointer (except INQUIRE)
    • READ assigns to its input list
Things that read an object
  • Uses in expressions (as you expect)
  • Input/Output statements
    • Read the file pointer (always)

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