The documentation is a little unclear on this, or perhaps I'm mis-reading it. If I were to declare a variable as a POINTER, and then mark it as VOLATILE, is this marking the pointer as VOLATILE, or the memory region that it points to? I need to mark the latter. In this example, I have a structure, BAR, which I want to be able to grow in size as the program progresses, and I have already mapped the HMM common area to global shared memory between multiple processes, as well as the contents of BAR. When I expand the array, I call a routine that remaps the new addresses of BAR to global, but since they're in shared memory, I need to mark the entire BAR structure as VOLATILE, not just the pointers.
STRUCTURE /FOO/
INTEGER*4 A
INTEGER*4 B
INTEGER*4 C
END STRUCTURE
BYTE BEG_ADR
INTEGER*4 NUM_ALLOCATED
INTEGER*4 INDEX
BYTE END_ADR
TYPE(FOO), POINTER :: BAR(:)
COMMON/HMM/
& BEG_ADR,& NUM_ALLOCATED,& INDEX,& BAR,& END_ADR
VOLATILE/HMM/
VOLATILE BAR