mpi_file_iwrite(3openmpi) [osx man page]
MPI_File_iwrite(3OpenMPI) MPI_File_iwrite(3OpenMPI) NAME
MPI_File_iwrite - Writes a file starting at the location specified by the individual file pointer (nonblocking, noncollective). SYNTAX
C Syntax #include <mpi.h> int MPI_File_iwrite(MPI_File fh, void *buf, int count, MPI_Datatype datatype, MPI_Request *request) Fortran Syntax INCLUDE 'mpif.h' MPI_FILE_IWRITE(FH, BUF, COUNT, DATATYPE, REQUEST, IERROR) <TYPE> BUF(*) INTEGER FH, COUNT, DATATYPE, REQUEST, IERROR C++ Syntax #include <mpi.h> MPI::Request MPI::File::Iwrite(const void* buf, int count, const MPI::Datatype& datatype) INPUT
/OUTPUT PARAMETER fh File handle (handle). INPUT PARAMETERS
buf Initial address of buffer (choice). count Number of elements in buffer (integer). datatype Data type of each buffer element (handle). OUTPUT PARAMETER
request Request object (handle). IERROR Fortran only: Error status (integer). DESCRIPTION
MPI_File_iwrite is a nonblocking version of the MPI_File_write 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 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_SEQENTIAL mode was specified when the file was open. ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func- tions 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. Open MPI 1.2 September 2006 MPI_File_iwrite(3OpenMPI)
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MPI_File_write_all_begin(3OpenMPI) MPI_File_write_all_begin(3OpenMPI) NAME
MPI_File_write_all_begin - Writes a file starting at the locations specified by individual file pointers; beginning part of a split collec- tive routine (nonblocking). SYNTAX
C Syntax #include <mpi.h> int MPI_File_write_all_begin(MPI_File fh, void *buf, int count, MPI_Datatype datatype) Fortran Syntax INCLUDE 'mpif.h' MPI_FILE_WRITE_ALL_BEGIN(FH, BUF, COUNT, DATATYPE, IERROR) <type> BUF(*) INTEGER FH, COUNT, DATATYPE, IERROR C++ Syntax #include <mpi.h> void MPI::File::Write_all_begin(const void* buf, int count, const MPI::Datatype& datatype) INPUT
/OUTPUT PARAMETER fh File handle (handle). INPUT PARAMETERS
buf Initial address of buffer (choice). count Number of elements in buffer (integer). datatype Data type of each buffer element (handle). OUTPUT PARAMETER
IERROR Fortran only: Error status (integer). DESCRIPTION
MPI_File_write_all_begin is the beginning part of a split collective, nonblocking routine that 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. NOTES
All the nonblocking collective routines for data access are "split" into two routines, each with _begin or _end as a suffix. These split collective routines are subject to the semantic rules described in Section 9.4.5 of the MPI-2 standard. ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func- tions 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. Open MPI 1.2 September 2006 MPI_File_write_all_begin(3OpenMPI)