/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
*
* (C) 2001 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
#include "mpiimpl.h"
/* -- Begin Profiling Symbol Block for routine MPI_Win_create_dynamic */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Win_create_dynamic = PMPI_Win_create_dynamic
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Win_create_dynamic MPI_Win_create_dynamic
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Win_create_dynamic as PMPI_Win_create_dynamic
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Win_create_dynamic(MPI_Info info, MPI_Comm comm, MPI_Win * win)
__attribute__ ((weak, alias("PMPI_Win_create_dynamic")));
#endif
/* -- End Profiling Symbol Block */
/* Define MPICH_MPI_FROM_PMPI if weak symbols are not supported to build
the MPI routines */
#ifndef MPICH_MPI_FROM_PMPI
#undef MPI_Win_create_dynamic
#define MPI_Win_create_dynamic PMPI_Win_create_dynamic
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Win_create_dynamic
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Win_create_dynamic - Create an MPI Window object for one-sided
communication. This window allows memory to be dynamically exposed and
un-exposed for RMA operations.
This is a collective call executed by all processes in the group of comm. It
returns a window win without memory attached. Existing process memory can be
attached as described below. This routine returns a window object that can be
used by these processes to perform RMA operations on attached memory. Because
this window has special properties, it will sometimes be referred to as a
dynamic window. The info argument can be used to specify hints similar to the
info argument for 'MPI_Win_create'.
In the case of a window created with 'MPI_Win_create_dynamic', the target_disp
for all RMA functions is the address at the target; i.e., the effective
window_base is 'MPI_BOTTOM' and the disp_unit is one. For dynamic windows, the
target_disp argument to RMA communication operations is not restricted to
non-negative values. Users should use 'MPI_Get_address' at the target process to
determine the address of a target memory location and communicate this address
to the origin process.
Input Parameters:
+ info - info argument (handle)
- comm - communicator (handle)
Output Parameters:
. win - window object returned by the call (handle)
Notes:
Users are cautioned that displacement arithmetic can overflow in variables of
type 'MPI_Aint' and result in unexpected values on some platforms. This issue may
be addressed in a future version of MPI.
Memory in this window may not be used as the target of one-sided accesses in
this window until it is attached using the function 'MPI_Win_attach'. That is, in
addition to using 'MPI_Win_create_dynamic' to create an MPI window, the user must
use 'MPI_Win_attach' before any local memory may be the target of an MPI RMA
operation. Only memory that is currently accessible may be attached.
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_COMM
.N MPI_ERR_INFO
.N MPI_ERR_OTHER
.N MPI_ERR_SIZE
.seealso: MPI_Win_attach MPI_Win_detach MPI_Win_allocate MPI_Win_allocate_shared MPI_Win_create MPI_Win_free
@*/
int MPI_Win_create_dynamic(MPI_Info info, MPI_Comm comm, MPI_Win * win)
{
int mpi_errno = MPI_SUCCESS;
MPIR_Win *win_ptr = NULL;
MPIR_Comm *comm_ptr = NULL;
MPIR_Info *info_ptr = NULL;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_WIN_CREATE_DYNAMIC);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPIR_FUNC_TERSE_RMA_ENTER(MPID_STATE_MPI_WIN_CREATE_DYNAMIC);
/* Validate parameters, especially handles needing to be converted */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_COMM(comm, mpi_errno);
MPIR_ERRTEST_INFO_OR_NULL(info, mpi_errno);
MPIR_ERRTEST_ARGNULL(win, "win", mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* Convert MPI object handles to object pointers */
MPIR_Comm_get_ptr(comm, comm_ptr);
MPIR_Info_get_ptr(info, info_ptr);
/* Validate parameters and objects (post conversion) */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
/* Validate pointers */
MPIR_Comm_valid_ptr(comm_ptr, mpi_errno, FALSE);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
mpi_errno = MPID_Win_create_dynamic(info_ptr, comm_ptr, &win_ptr);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
/* Initialize a few fields that have specific defaults */
win_ptr->name[0] = 0;
win_ptr->errhandler = 0;
/* return the handle of the window object to the user */
MPIR_OBJ_PUBLISH_HANDLE(*win, win_ptr->handle);
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_RMA_EXIT(MPID_STATE_MPI_WIN_CREATE_DYNAMIC);
MPID_THREAD_CS_EXIT(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
return mpi_errno;
fn_fail:
/* --BEGIN ERROR HANDLING-- */
#ifdef HAVE_ERROR_CHECKING
{
mpi_errno =
MPIR_Err_create_code(mpi_errno, MPIR_ERR_RECOVERABLE, FCNAME, __LINE__, MPI_ERR_OTHER,
"**mpi_win_create_dynamic", "**mpi_win_create_dynamic %I %C %p",
info, comm, win);
}
#endif
mpi_errno = MPIR_Err_return_comm(comm_ptr, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}