/* **************************************************************************
 * Copyright (C) 2020-2023 Advanced Micro Devices, Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * *************************************************************************/

#include <chrono>

#include "common_host_helpers.hpp"

/***********************************************************************
 * timing functions                                                    *
 ***********************************************************************/

/* CPU Timer (in microseconds): no GPU synchronization
 */
double get_time_us_no_sync()
{
    namespace sc = std::chrono;
    const sc::steady_clock::time_point t = sc::steady_clock::now();
    return double(sc::duration_cast<sc::microseconds>(t.time_since_epoch()).count());
}

/* CPU Timer (in microseconds): synchronize with the default device and return wall time
 */
double get_time_us()
{
    hipError_t status = hipDeviceSynchronize();
#ifdef ROCSOLVER_LIBRARY
    if(status != hipSuccess)
        fmt::print(std::cerr, "{}: [{}] {}\n", __PRETTY_FUNCTION__, hipGetErrorName(status),
                   hipGetErrorString(status));
#else
    THROW_IF_HIP_ERROR(status);
#endif
    return get_time_us_no_sync();
}

/* CPU Timer (in microseconds): synchronize with given queue/stream and return wall time
 */
double get_time_us_sync(hipStream_t stream)
{
    hipError_t status = hipStreamSynchronize(stream);
#ifdef ROCSOLVER_LIBRARY
    if(status != hipSuccess)
        fmt::print(std::cerr, "{}: [{}] {}\n", __PRETTY_FUNCTION__, hipGetErrorName(status),
                   hipGetErrorString(status));
#else
    THROW_IF_HIP_ERROR(status);
#endif
    return get_time_us_no_sync();
}
