mpi_win_post(3) [redhat man page]

MPI_Win_post(3) 						      LAM/MPI							   MPI_Win_post(3)

NAME

       MPI_Win_post -  Starts an RMA exposure epoch for a local window

SYNOPSIS

       #include <mpi.h>
       int MPI_Win_post(MPI_Group group, int assertion, MPI_Win win)

INPUT PARAMETERS

       group  - group of origin processes (handle)
       assertion
	      - program assertion (integer)
       win    - window object (handle)

NOTES

       Starts  an  RMA exposure epoch for the local window associated with win. Only processes in group should access the window with RMA calls on
       win during this epoch. Each process in group must issue a matching call to MPI_WIN_START. MPI_WIN_POST does not block.

NOTES FOR FORTRAN

       All MPI routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the end of the argument  list.   ierr
       is  an integer and has the same meaning as the return value of the routine in C.  In Fortran, MPI routines are subroutines, and are invoked
       with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

USAGE WITH IMPI EXTENSIONS

       The IMPI standard only supports MPI-1 functions.  Hence, this function is currently not designed to operate within an IMPI job.

ERRORS

       If an error occurs in an MPI function, the current MPI error handler is called to handle it.  By default, this error handler aborts the MPI
       job.   The error handler may be changed with MPI_Errhandler_set ; the predefined error handler MPI_ERRORS_RETURN may be used to cause error
       values to be returned (in C and Fortran; this error handler is less useful in with the C++ MPI  bindings.   The	predefined  error  handler
       MPI::ERRORS_THROW_EXCEPTIONS should be used in C++ if the error value needs to be recovered).  Note that MPI does not guarantee that an MPI
       program can continue past an error.

       All MPI routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of the function and Fortran  routines	in
       the  last  argument.  The C++ bindings for MPI do not return error values; instead, error values are communicated by throwing exceptions of
       type MPI::Exception (but not by default).  Exceptions are only thrown if the error value is not MPI::SUCCESS
	.

       Note that if the MPI::ERRORS_RETURN handler is set in C++, while MPI functions will return upon an error, there will be no way  to  recover
       what the actual error value was.
       MPI_SUCCESS
	      - No error; MPI routine completed successfully.
       MPI_ERR_WIN
	      - Invalid window.  A common error is to use a null window in a call.
       MPI_ERR_GROUP
	      - Null group passed to function.
       MPI_ERR_EPOCH
	      - This error indicates than an operation has been attempted on a "closed" window. Certain one-sided operations can only be performed
	      on windows whose epoch has been started with MPI_Win_start.

SEE ALSO

       MPI_Put(3), MPI_Get(3), MPI_Win_create(3), MPI_Win_start(3), MPI_Win_complete(3), MPI_Win_fence(3), MPI_Win_free(3),  MPI_Win_get_group(3),
       MPI_Win_get_group(3), MPI_Win_wait(3)

MORE INFORMATION

       For  more  information,	please	see the official MPI Forum web site, which contains the text of both the MPI-1 and MPI-2 standards.  These
       documents contain detailed information about each MPI function (most of which is not duplicated in these man pages).

       http://www.mpi-forum.org/

LOCATION

       wpost.c

LAM
/MPI 6.5.8							    11/10/2002							   MPI_Win_post(3)

MPI_Win_free(3) 						      LAM/MPI							   MPI_Win_free(3)

NAME

       MPI_Win_free -  Frees a window object

SYNOPSIS

       #include <mpi.h>
       int
       MPI_Win_free(MPI_Win *win)

INPUT PARAMETER

       win    - window object (handle)

NOTES

       Frees  the  window object win and returns a null handle (equal to MPI_WIN_NULL). This is a collective call executed by all processes in the
       group associated with win. MPI_WIN_FREE(win) can be invoked by a process only after it has completed its involvement in RMA  communications
       on  window  win:  i.e.,	the  process  has  called MPI_WIN_FENCE, or called MPI_WIN_WAIT to match a previous call to MPI_WIN_POST or called
       MPI_WIN_COMPLETE to match a previous call to MPI_WIN_START or called MPI_WIN_UNLOCK to match a previous call to MPI_WIN_LOCK. When the call
       returns, the window memory can be freed.

NOTES FOR FORTRAN

       All  MPI  routines in Fortran (except for MPI_WTIME and MPI_WTICK ) have an additional argument ierr at the end of the argument list.  ierr
       is an integer and has the same meaning as the return value of the routine in C.	In Fortran, MPI routines are subroutines, and are  invoked
       with the call statement.

       All MPI objects (e.g., MPI_Datatype , MPI_Comm ) are of type INTEGER in Fortran.

USAGE WITH IMPI EXTENSIONS

       The IMPI standard only supports MPI-1 functions.  Hence, this function is currently not designed to operate within an IMPI job.

ERRORS

       If an error occurs in an MPI function, the current MPI error handler is called to handle it.  By default, this error handler aborts the MPI
       job.  The error handler may be changed with MPI_Errhandler_set ; the predefined error handler MPI_ERRORS_RETURN may be used to cause  error
       values  to  be  returned  (in  C and Fortran; this error handler is less useful in with the C++ MPI bindings.  The predefined error handler
       MPI::ERRORS_THROW_EXCEPTIONS should be used in C++ if the error value needs to be recovered).  Note that MPI does not guarantee that an MPI
       program can continue past an error.

       All  MPI  routines (except MPI_Wtime and MPI_Wtick ) return an error value; C routines as the value of the function and Fortran routines in
       the last argument.  The C++ bindings for MPI do not return error values; instead, error values are communicated by throwing  exceptions	of
       type MPI::Exception (but not by default).  Exceptions are only thrown if the error value is not MPI::SUCCESS
	.

       Note  that  if the MPI::ERRORS_RETURN handler is set in C++, while MPI functions will return upon an error, there will be no way to recover
       what the actual error value was.
       MPI_SUCCESS
	      - No error; MPI routine completed successfully.
       MPI_ERR_WIN
	      - Invalid window.  A common error is to use a null window in a call.
       MPI_ERR_EPOCH
	      - This error indicates than an operation has been attempted on a "closed" window. Certain one-sided operations can only be performed
	      on windows whose epoch has been started with MPI_Win_start.

SEE ALSO

       MPI_Put(3),     MPI_Get(3),     MPI_Win_create(3),     MPI_Win_start(3),    MPI_Win_complete(3),    MPI_Win_fence(3),	MPI_Accumulate(3),
       MPI_Win_get_group(3), MPI_Win_get_group(3), MPI_Win_wait(3)

MORE INFORMATION

       For more information, please see the official MPI Forum web site, which contains the text of both the MPI-1  and  MPI-2	standards.   These
       documents contain detailed information about each MPI function (most of which is not duplicated in these man pages).

       http://www.mpi-forum.org/

LOCATION

       wfree.c

LAM
/MPI 6.5.8							    11/10/2002							   MPI_Win_free(3)