MPI_File_iwrite_all − Writes a file starting at the location specified by the individual file pointer (nonblocking, collective).
#include
<mpi.h>
int MPI_File_iwrite_all(MPI_File fh, const void
*buf, int count,
MPI_Datatype datatype, MPI_Request *request) |
USE MPI
! or the older form: INCLUDE ’mpif.h’
MPI_FILE_IWRITE_ALL(FH, BUF, COUNT,
DATATYPE, REQUEST, IERROR)
<type> |
BUF(*) | |||
INTEGER |
FH, COUNT, DATATYPE, REQUEST, IERROR |
USE mpi_f08
MPI_File_iwrite_all(fh, buf, count,
datatype, request, ierror)
TYPE(MPI_File), INTENT(IN) :: fh | |
TYPE(*), DIMENSION(..) :: buf | |
INTEGER, INTENT(IN) :: count | |
TYPE(MPI_Datatype), INTENT(IN) :: datatype | |
TYPE(MPI_Request), INTENT(OUT) :: request | |
INTEGER, OPTIONAL, INTENT(OUT) :: ierror |
fh |
File handle (handle). |
buf |
Initial address of buffer (choice). |
|||
count |
Number of elements in buffer (integer). |
|||
datatype |
Data type of each buffer element (handle). |
request |
Request object (handle). |
|||
IERROR |
Fortran only: Error status (integer). |
MPI_File_iwrite_all is a nonblocking version of the MPI_File_write_all interface. It attempts to write into the file associated with fh (at the current individual file pointer position maintained by the system) a total number of count data items having datatype type from the user’s buffer buf. The data is written into those parts of the file specified by the current view. MPI_File_iwrite_all stores the number of datatype elements actually written in status. All other fields of status are undefined.
It is erroneous to call this function if MPI_MODE_SEQUENTIAL mode was specified when the file was open.
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.