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/*
* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
* University Research and Technology
* Corporation. All rights reserved.
* Copyright (c) 2004-2005 The University of Tennessee and The University
* of Tennessee Research Foundation. All rights
* reserved.
* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
* University of Stuttgart. All rights reserved.
* Copyright (c) 2004-2005 The Regents of the University of California.
* All rights reserved.
* Copyright (c) 2006 Cisco Systems, Inc. All rights reserved.
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
#include "ompi_config.h"
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#include <stdio.h>
#include MCA_timer_IMPLEMENTATION_HEADER
#include "ompi/mpi/c/bindings.h"
#include "ompi/runtime/mpiruntime.h"
#if OPAL_HAVE_WEAK_SYMBOLS && OMPI_PROFILING_DEFINES
#pragma weak MPI_Wtime = PMPI_Wtime
#endif
#if OMPI_PROFILING_DEFINES
#include "ompi/mpi/c/profile/defines.h"
#endif
static const char FUNC_NAME[] = "MPI_Wtime";
double MPI_Wtime(void)
{
double wtime;
#if OPAL_TIMER_USEC_NATIVE
/* We may or may not have native usec precision on Windows, so put
this #if before the #ifdef checking for Windows. */
wtime = ((double) opal_timer_base_get_usec()) / 1000000.0;
#elif defined(__WINDOWS__)
wtime = ((double) opal_timer_base_get_cycles()) /
((double) opal_timer_base_get_freq());
#else
/* Fall back to gettimeofday() if we have nothing else */
struct timeval tv;
gettimeofday(&tv, NULL);
wtime = tv.tv_sec;
wtime += (double)tv.tv_usec / 1000000.0;
#endif
OPAL_CR_NOOP_PROGRESS();
return wtime;
}
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