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MPI_File_read_shared - Reads a file using the shared file pointer
(blocking, noncollective).
C Syntax
#include <mpi.h>
int MPI_File_read_shared(MPI_File fh, void *buf, int count,
MPI_Datatype datatype, MPI_Status *status)
INCLUDE ’mpif.h’
MPI_FILE_READ_SHARED(FH, BUF, COUNT, DATATYPE, STATUS,
IERROR)
<TYPE> BUF(*)
INTEGER FH, COUNT, DATATYPE,
STATUS(MPI_STATUS_SIZE), IERROR
#include <mpi.h>
void MPI::File::Read_shared(void* buf, int count,
const MPI::Datatype& datatype, MPI::Status& status)
void MPI::File::Read_shared(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).
- status
- Status object (status).
- IERROR
- Fortran only: Error status (integer).
MPI_File_read_shared is a blocking routine that uses the shared
file pointer to read files. The order of serialization is not deterministic
for this noncollective routine.
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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