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MPI_File_iwrite_shared - Writes a file using the shared file pointer
(nonblocking, noncollective).
C Syntax
#include <mpi.h>
int MPI_File_(MPI_File fh, void *buf, int count, MPI_Datatype
datatype, MPI_Request *request)
INCLUDE ’mpif.h’
MPI_File_(FH, BUF, COUNT, DATATYPE, REQUEST, IERROR)
<type> BUF(*)
INTEGER FH, COUNT, DATATYPE, REQUEST, IERROR
#include <mpi.h>
MPI::Request MPI::File::Iwrite_shared(const void* buf, int count,
const MPI::Datatype& datatype)
- fh
- File handle (handle).
- count
- Number of elements in buffer (integer).
- datatype
- Data type of each buffer
element (handle).
- buf
- Initial address of buffer (choice).
- request
- Request object (handle).
- IERROR
- Fortran only: Error status (integer).
MPI_File_iwrite_shared is a nonblocking routine that uses
the shared file pointer to write files. The order of serialization is not
deterministic for this noncollective routine, so you need to use other
methods of synchronization to impose a particular order.
Almost
all MPI routines return an error value; C routines as the value of the
function and Fortran routines in the last argument. C++ functions do not
return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS,
then on error the C++ exception mechanism will be used to throw an MPI:Exception
object.
Before the error value is returned, the current MPI error handler
is called. For MPI I/O function errors, the default error handler is set
to MPI_ERRORS_RETURN. The error handler may be changed with MPI_File_set_errhandler;
the predefined error handler MPI_ERRORS_ARE_FATAL may be used to make I/O
errors fatal. Note that MPI does not guarantee that an MPI program can continue
past an error.
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