/* -*- 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_Wtime */
#if defined(HAVE_PRAGMA_WEAK)
#pragma weak MPI_Wtime = PMPI_Wtime
#elif defined(HAVE_PRAGMA_HP_SEC_DEF)
#pragma _HP_SECONDARY_DEF PMPI_Wtime MPI_Wtime
#elif defined(HAVE_PRAGMA_CRI_DUP)
#pragma _CRI duplicate MPI_Wtime as PMPI_Wtime
#elif defined(HAVE_WEAK_ATTRIBUTE)
double MPI_Wtime(void) __attribute__ ((weak, alias("PMPI_Wtime")));
#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_Wtime
#define MPI_Wtime PMPI_Wtime
#endif
#undef FUNCNAME
#define FUNCNAME MPI_Wtime
/*@
MPI_Wtime - Returns an elapsed time on the calling processor
Return value:
Time in seconds since an arbitrary time in the past.
Notes:
This is intended to be a high-resolution, elapsed (or wall) clock.
See 'MPI_WTICK' to determine the resolution of 'MPI_WTIME'.
If the attribute 'MPI_WTIME_IS_GLOBAL' is defined and true, then the
value is synchronized across all processes in 'MPI_COMM_WORLD'.
Notes for Fortran:
This is a function, declared as 'DOUBLE PRECISION MPI_WTIME()' in Fortran.
.see also: MPI_Wtick, MPI_Comm_get_attr, MPI_Attr_get
@*/
double MPI_Wtime(void)
{
double d;
MPID_Time_t t;
MPIR_FUNC_TERSE_STATE_DECL(MPID_STATE_MPI_WTIME);
MPIR_ERRTEST_INITIALIZED_ORDIE();
MPIR_FUNC_TERSE_ENTER(MPID_STATE_MPI_WTIME);
MPID_Wtime(&t);
MPID_Wtime_todouble(&t, &d);
MPIR_FUNC_TERSE_EXIT(MPID_STATE_MPI_WTIME);
return d;
}