We use the
ISO C
declaration format. All MPI names have an MPI_
prefix, defined constants are in all capital letters, and defined types and
functions have one capital letter after the prefix.
Programs must not declare variables or functions with names beginning with
the prefix MPI_.
To support the profiling interface, programs should not declare
functions with names beginning with the prefix PMPI_.
The definition of named constants, function prototypes, and type
definitions must be supplied in an include file mpi.h.
Almost all C functions return an error code. The successful return code will
be MPI_SUCCESS, but failure return codes are implementation dependent.
Type declarations are provided for handles to each category of opaque
objects.
Array arguments are indexed from zero.
Logical flags are integers with value 0 meaning ``false'' and a non-zero
value meaning ``true.''
Choice arguments are pointers of type void *.
Address arguments are of MPI defined type
MPI_Aint.
File displacements are of type MPI_Offset.
MPI_Aint is defined to be an integer of the size needed to
hold any valid address on the target architecture.
MPI_Offset is defined to be an integer of the size needed to
hold any valid file size on the target architecture.
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MPI-2.0 of July 1, 2008
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