The PRIVATE clause declares specified variables to be private to
each thread in a team. It takes the following form:
- PRIVATE (list)
Is the name of one or more variables or common blocks that are
accessible to the scoping unit. Subobjects cannot be specified. Each
name must be separated by a comma, and a named common block must
appear between slashes (/ /).
Rules and Behavior
The following occurs when variables are declared in a PRIVATE
- A new object of the same type is declared once for
each thread in the team. The new object is no longer storage
associated with the original object.
- All references to the original object in the lexical
extent of the directive construct are replaced with references
to the private object.
- Variables defined as PRIVATE are undefined for each thread
on entering the construct and the corresponding shared variable
is undefined on exit from a parallel construct.
- Contents, allocation state, and association status
of variables defined as PRIVATE are undefined when they are
referenced outside the lexical extent (but inside the dynamic
extent) of the construct, unless they are passed as actual
arguments to called routines.
For Compaq Fortran parallel directives, LOCAL is an alternative
spelling for PRIVATE.
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