/* -*- 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_start */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Win_start = PMPI_Win_start
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Win_start MPI_Win_start
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Win_start as PMPI_Win_start
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Win_start(MPI_Group group, int assert, MPI_Win win)
__attribute__ ((weak, alias("PMPI_Win_start")));
#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_start
#define MPI_Win_start PMPI_Win_start
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Win_start
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Win_start - Start an RMA access epoch for MPI
Input Parameters:
+ group - group of target processes (handle)
. assert - Used to optimize this call; zero may be used as a default.
See notes. (integer)
- win - window object (handle)
Notes:
The 'assert' argument is used to indicate special conditions for the
fence that an implementation may use to optimize the 'MPI_Win_start'
operation. The value zero is always correct. Other assertion values
may be or''ed together. Assertions tha are valid for 'MPI_Win_start' are\:
. MPI_MODE_NOCHECK - the matching calls to 'MPI_WIN_POST' have already
completed on all target processes when the call to 'MPI_WIN_START' is made.
The nocheck option can be specified in a start call if and only if it is
specified in each matching post call. This is similar to the optimization
of ready-send that may save a handshake when the handshake is implicit in
the code. (However, ready-send is matched by a regular receive, whereas
both start and post must specify the nocheck option.)
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_WIN
.N MPI_ERR_OTHER
@*/
int MPI_Win_start(MPI_Group group, int assert, MPI_Win win)
{
int mpi_errno = MPI_SUCCESS;
MPIR_Win *win_ptr = NULL;
MPIR_Group *group_ptr = NULL;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_WIN_START);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPIR_FUNC_TERSE_RMA_ENTER(MPID_STATE_MPI_WIN_START);
/* Validate parameters, especially handles needing to be converted */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_WIN(win, mpi_errno);
MPIR_ERRTEST_GROUP(group, mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* Get handles to MPI objects. */
MPIR_Win_get_ptr(win, win_ptr);
MPIR_Group_get_ptr(group, group_ptr);
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
/* Validate win_ptr */
MPIR_Win_valid_ptr(win_ptr, mpi_errno);
if (mpi_errno)
goto fn_fail;
MPIR_Group_valid_ptr(group_ptr, mpi_errno);
/* TODO: Validate assert argument */
/* TODO: Validate window state */
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
mpi_errno = MPID_Win_start(group_ptr, assert, win_ptr);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_RMA_EXIT(MPID_STATE_MPI_WIN_START);
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_start", "**mpi_win_start %G %A %W", group, assert, win);
}
#endif
mpi_errno = MPIR_Err_return_win(win_ptr, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}