/* -*- 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_shared_query */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Win_shared_query = PMPI_Win_shared_query
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Win_shared_query MPI_Win_shared_query
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Win_shared_query as PMPI_Win_shared_query
#elif defined(HAVE_WEAK_ATTRIBUTE)
int MPI_Win_shared_query(MPI_Win win, int rank, MPI_Aint * size, int *disp_unit, void *baseptr)
__attribute__ ((weak, alias("PMPI_Win_shared_query")));
#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_shared_query
#define MPI_Win_shared_query PMPI_Win_shared_query
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Win_shared_query
#undef FCNAME
#define FCNAME MPL_QUOTE(FUNCNAME)
/*@
MPI_Win_shared_query - Query the size and base pointer for a patch of a shared
memory window.
This function queries the process-local address for remote memory segments
created with 'MPI_Win_allocate_shared'. This function can return different
process-local addresses for the same physical memory on different processes.
The returned memory can be used for load/store accesses subject to the
constraints defined in MPI 3.0, Section 11.7. This function can only be called
with windows of type 'MPI_Win_flavor_shared'. If the passed window is not of
flavor 'MPI_Win_flavor_shared', the error 'MPI_ERR_RMA_FLAVOR' is raised. When rank
is 'MPI_PROC_NULL', the pointer, disp_unit, and size returned are the pointer,
disp_unit, and size of the memory segment belonging the lowest rank that
specified size > 0. If all processes in the group attached to the window
specified size = 0, then the call returns size = 0 and a baseptr as if
'MPI_Alloc_mem' was called with size = 0.
Input Parameters:
+ win - window object used for communication (handle)
- rank - target rank
Output Parameters:
+ size - size of the segment at the given rank
. disp_unit - local unit size for displacements, in bytes (positive integer)
- baseptr - base pointer in the calling process'' address space of the shared
segment belonging to the target rank.
.N ThreadSafe
.N Fortran
.N Errors
.N MPI_SUCCESS
.N MPI_ERR_ARG
.N MPI_ERR_RANK
.N MPI_ERR_WIN
.seealso: MPI_Win_allocate_shared
@*/
int MPI_Win_shared_query(MPI_Win win, int rank, MPI_Aint * size, int *disp_unit, void *baseptr)
{
int mpi_errno = MPI_SUCCESS;
MPIR_Win *win_ptr = NULL;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_WIN_SHARED_QUERY);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPID_THREAD_CS_ENTER(GLOBAL, MPIR_THREAD_GLOBAL_ALLFUNC_MUTEX);
MPIR_FUNC_TERSE_RMA_ENTER(MPID_STATE_MPI_WIN_SHARED_QUERY);
/* Validate parameters, especially handles needing to be converted */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_ERRTEST_WIN(win, mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* Convert MPI object handles to object pointers */
MPIR_Win_get_ptr(win, win_ptr);
/* Validate parameters and objects (post conversion) */
#ifdef HAVE_ERROR_CHECKING
{
MPID_BEGIN_ERROR_CHECKS;
{
MPIR_Comm *comm_ptr;
/* Validate win_ptr */
MPIR_Win_valid_ptr(win_ptr, mpi_errno);
if (mpi_errno)
goto fn_fail;
MPIR_ERRTEST_ARGNULL(size, "size", mpi_errno);
MPIR_ERRTEST_ARGNULL(disp_unit, "disp_unit", mpi_errno);
MPIR_ERRTEST_ARGNULL(baseptr, "baseptr", mpi_errno);
comm_ptr = win_ptr->comm_ptr;
MPIR_ERRTEST_SEND_RANK(comm_ptr, rank, mpi_errno);
MPIR_ERRTEST_WIN_FLAVOR(win_ptr, MPI_WIN_FLAVOR_SHARED, mpi_errno);
}
MPID_END_ERROR_CHECKS;
}
#endif /* HAVE_ERROR_CHECKING */
/* ... body of routine ... */
mpi_errno = MPID_Win_shared_query(win_ptr, rank, size, disp_unit, baseptr);
if (mpi_errno != MPI_SUCCESS)
goto fn_fail;
/* ... end of body of routine ... */
fn_exit:
MPIR_FUNC_TERSE_RMA_EXIT(MPID_STATE_MPI_WIN_SHARED_QUERY);
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_shared_query", "**mpi_win_shared_query %W %d %p %p",
win, rank, size, baseptr);
}
#endif
mpi_errno = MPIR_Err_return_win(win_ptr, FCNAME, mpi_errno);
goto fn_exit;
/* --END ERROR HANDLING-- */
}