petsc-3.7.1 2016-05-15
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PetscBinarySynchronizedWrite

writes to a binary file.

Synopsis

PetscErrorCode  PetscBinarySynchronizedWrite(MPI_Comm comm,int fd,void *p,PetscInt n,PetscDataType type,PetscBool istemp)
Collective on MPI_Comm Many br

Input Parameters

comm - the MPI communicator Many br
fd - the file Many br
n - the number of items to write Many br
p - the buffer Many br
istemp - the buffer may be changed Many br
type - the type of items to write (PETSC_INT, PETSC_DOUBLE or PETSC_SCALAR) Many br

Many br

Notes

Process 0 does a PetscBinaryWrite() Many br

PetscBinarySynchronizedWrite() uses byte swapping to work on all machines. Many brIntegers are stored on the file as 32 long, regardless of whether Many brthey are stored in the machine as 32 or 64, this means the same Many brbinary file may be read on any machine. Many br

Notes: because byte-swapping may be done on the values in data it cannot be declared const Many br

WARNING: This is NOT like PetscSynchronizedFPrintf()! This routine ignores calls on all but process 0, Many brwhile PetscSynchronizedFPrintf() has all processes print their strings in order. Many br

See Also

PetscBinaryWrite(), PetscBinaryOpen(), PetscBinaryClose(), PetscBinaryRead(), PetscBinarySynchronizedRead(),
PetscBinarySynchronizedSeek() Many br

Level:developer
Location:
src/sys/fileio/sysio.c
Index of all Sys routines
Table of Contents for all manual pages
Index of all manual pages