/*--------------------------------------------------------------------------
  Project:  Horizon
  File:     rdt_Stopwatch.cpp

  Copyright (C)2010 Nintendo Co., Ltd.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Rev: 22867 $
 *-------------------------------------------------------------------------*/

#include "rdt_Stopwatch.h"

#include <nn/dbg.h>
#include <nn/os.h>
#include <nn/fnd.h>

#include <string.h>

#ifdef ENABLE_RDT_STOPWATCH

namespace
{

}  // end of anonymous namespace

namespace nn { namespace rdt { namespace CTR { namespace detail{


bool Stopwatch::s_initialized = false;
Stopwatch* Stopwatch::s_paStopwatches[MAX_STOPWATCHES];

void Stopwatch::Initialize(void)
{
    if(!s_initialized)
    {
        for(int i=0; i<MAX_STOPWATCHES; ++i)
        {
            s_paStopwatches[i] = NULL;
        }
        s_initialized = true;
    }
    else
    {
        return;  // Do nothing.
    }
}


void Stopwatch::Finalize(void)
{
    if(s_initialized)
    {
        s_initialized = false;
    }
    else
    {
        NN_LOG("Stopwatch is not initialized, but Finalized() called...\n");
        // Do nothing.
    }
}


// 全ストップウォッチの内容をリセット
void Stopwatch::ResetAll(void)
{
    for(int i=0; i<MAX_STOPWATCHES; ++i)
    {
        if(s_paStopwatches[i])
        {
            s_paStopwatches[i]->Reset();
        }
    }
}


// 全ストップウォッチの内容を表示
void Stopwatch::PrintAll(void)
{
    printHeadLine();
    for(int i=0; i<MAX_STOPWATCHES; ++i)
    {
        if(s_paStopwatches[i])
        {
            s_paStopwatches[i]->printContents();
        }
    }
}



Stopwatch::Stopwatch(void)
{
    if(!IsInitialized())
    {
        NN_LOG("Initialize Stopwatch...\n");
        Initialize();
    }

    bool ret = initInstance("(No name)");
    if(!ret)
    {
        NN_LOG("Failed to initInstance().\n");
    }
}


Stopwatch::Stopwatch(const char *name)
{
    NN_NULL_ASSERT(name);

    if(!IsInitialized())
    {
        NN_LOG("Initialize Stopwatch...\n");
        Initialize();
    }

    bool ret = initInstance(name);
    if(!ret)
    {
        NN_LOG("Failed to initInstance().\n");
    }
}


Stopwatch::~Stopwatch(void)
{
    removeFromList();
}


void Stopwatch::Stop(void)
{
    s64 diff = nn::os::Tick::GetSystemCurrent() - m_start;

    if(diff > m_max)
    {
        m_max = diff;
    }

    if(diff < m_min)
    {
        m_min = diff;
    }

    m_total += diff;

    ++m_times;
}


void Stopwatch::Print(void) const
{
    printHeadLine();
    printContents();
}


void Stopwatch::printHeadLine(void)
{
    nn::dbg::detail::Printf( "   Average,      Min,      Max,      Total,    Times,  Name   (Unit is usec)\n" );
}


void Stopwatch::printContents(void) const
{
    using nn::dbg::detail::Printf;

    if(m_times > 0)
    {
        // 単位はマイクロ秒で表示。
        s64  total = nnosTickConvertToMicroSeconds(m_total);
        s64  min   = nnosTickConvertToMicroSeconds(m_min);
        s64  max   = nnosTickConvertToMicroSeconds(m_max);
        f64  avg   = static_cast<f64>(total) / m_times;
        Printf( "%10.2llf, %8lld, %8lld, %10lld, %8d, \"%s\"\n", avg, min, max, total, m_times, m_name);
    }
    else if(m_times == 0)
    {
        Printf( "      ------     NO DATA     ------        %s\"\n", m_name);
    }
    else
    {
        NN_PANIC("m_times is negative! (%d)\n", m_times);
    }
}


bool Stopwatch::initInstance(const char *name)
{
    Reset();
    setName(name);
    return addToList();
}


// 管理リストに自分のインスタンスを登録。
bool Stopwatch::addToList(void)
{
    for(int i=0; i<MAX_STOPWATCHES; ++i)
    {
        if(s_paStopwatches[i]==NULL)
        {
            s_paStopwatches[i] = this;
            return true;
        }
    }

    NN_PANIC("No space to addTo().  Too many Stopwatches...");
    return false;
}


// 管理リストから自分のインスタンスを削除。
void Stopwatch::removeFromList(void)
{
    for(int i=0; i<MAX_STOPWATCHES; ++i)
    {
        if(s_paStopwatches[i]==this)
        {
            s_paStopwatches[i] = NULL;
            return;
        }
    }

    NN_PANIC("Cannot find my instance!  Why?");
}


void Stopwatch::setName(const char *name)
{
    if(name)
    {
        strncpy(m_name, name, MAX_NAME_LENGTH);
    }
    else
    {
        strncpy(m_name, "(NULL)", MAX_NAME_LENGTH);
    }
}


bool Stopwatch::Test(void)
{
    Stopwatch::Initialize();

    Stopwatch sp("AAABBBCCC");

    for(int i=0; i<100; ++i)
    {
        sp.Start();
        nn::os::Thread::Sleep(nn::fnd::TimeSpan::FromMilliSeconds(10));
        sp.Stop();
    }

    Stopwatch nanashi;

    nanashi.Start();
    nn::os::Thread::Sleep(nn::fnd::TimeSpan::FromMicroSeconds(50));
    nanashi.Stop();

    Stopwatch::PrintAll();

    Stopwatch::Finalize();

    return true;
}



}}}} // namespace nn::rdt::CTR::detail


#endif // end of ENABLE_RDT_STOPWATCH