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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose:
//
// $NoKeywords: $
//
//=============================================================================//
#include "matchmakingqos.h"
#include "threadtools.h"
// memdbgon must be the last include file in a .cpp file!!!
#include "tier0/memdbgon.h"
#if _X360
//-----------------------------------------------------------------------------
// Quality of Service detection routines
//-----------------------------------------------------------------------------
class CQosDetector
{
public:
CQosDetector();
~CQosDetector();
public:
bool InitiateLookup();
bool WaitForResults();
public:
MM_QOS_t GetResults() const { return m_Results; }
private:
void Release();
XNQOS *m_pQos;
void ProcessResults();
MM_QOS_t m_Results;
};
CQosDetector::CQosDetector() : m_pQos( NULL )
{
m_Results.nPingMsMin = 50; // 50 ms default ping
m_Results.nPingMsMed = 50; // 50 ms default ping
m_Results.flBwUpKbs = 32.0f; // 32 KB/s = 256 kbps
m_Results.flBwDnKbs = 32.0f; // 32 KB/s = 256 kbps
m_Results.flLoss = 0.0f; // 0% packet loss
}
CQosDetector::~CQosDetector()
{
Release();
}
void CQosDetector::Release()
{
if ( m_pQos )
{
XNetQosRelease( m_pQos );
m_pQos = NULL;
}
}
bool CQosDetector::InitiateLookup()
{
Release();
//
// Issue the asynchronous QOS service lookup query
//
XNQOS *pQos = NULL;
INT err = XNetQosServiceLookup( NULL, NULL, &pQos );
if ( err )
{
Msg( "CQosDetector::InitiateLookup failed, err = %d\n", err );
return false;
}
if ( !pQos )
{
Msg( "CQosDetector::InitiateLookup failed, qos is null.\n" );
return false;
}
m_pQos = pQos;
return true;
}
bool CQosDetector::WaitForResults()
{
if ( !m_pQos )
return false;
//
// Spin-sleep here while waiting for the probes to come back
//
const int numSecQosTimeout = 30; // Consider QOS query timed out if 30 seconds elapsed
float flTimeStart = Plat_FloatTime(), flTimeEndTimeout = flTimeStart + numSecQosTimeout;
for ( ; ; )
{
if ( Plat_FloatTime() > flTimeEndTimeout )
{
Msg( "CQosDetector::WaitForResults timed out after %d sec.\n", numSecQosTimeout );
Release();
return false; // Timed out
}
if ( m_pQos->axnqosinfo->bFlags & XNET_XNQOSINFO_COMPLETE )
break; // QOS query has completed
ThreadSleep( 10 );
}
if ( ! ( m_pQos->axnqosinfo->bFlags & XNET_XNQOSINFO_TARGET_CONTACTED ) ||
( m_pQos->axnqosinfo->bFlags & XNET_XNQOSINFO_TARGET_DISABLED ) )
{
// Failed to contact host or target disabled
Msg( "CQosDetector::WaitForResults host unavailable.\n" );
Release();
return false;
}
ProcessResults();
Release();
return true;
}
void CQosDetector::ProcessResults()
{
MM_QOS_t Results;
Results.nPingMsMin = m_pQos->axnqosinfo->wRttMinInMsecs;
Results.nPingMsMed = m_pQos->axnqosinfo->wRttMedInMsecs;
Results.flBwUpKbs = m_pQos->axnqosinfo->dwUpBitsPerSec / 8192.0f;
if ( Results.flBwUpKbs < 1.f )
{
Results.flBwUpKbs = 1.f;
}
Results.flBwDnKbs = m_pQos->axnqosinfo->dwDnBitsPerSec / 8192.0f;
if ( Results.flBwDnKbs < 1.f )
{
Results.flBwDnKbs = 1.f;
}
Results.flLoss = m_pQos->axnqosinfo->cProbesXmit ? ( float( m_pQos->axnqosinfo->cProbesXmit - m_pQos->axnqosinfo->cProbesRecv ) * 100.f / m_pQos->axnqosinfo->cProbesXmit ) : 0.f;
m_Results = Results;
// Dump the results
Msg(
"[QOS] Fresh QOS results available:\n"
"[QOS] ping %d min, %d med\n"
"[QOS] bandwidth %.1f kB/s upstream, %.1f kB/s downstream\n"
"[QOS] avg packet loss %.0f percents\n",
Results.nPingMsMin, Results.nPingMsMed,
Results.flBwUpKbs, Results.flBwDnKbs,
Results.flLoss
);
}
//
// Global QOS detector thread
//
static class CQosThread
{
public:
CQosThread();
MM_QOS_t GetResults();
static unsigned ThreadProc( void *pThis ) { return ( (CQosThread *) pThis )->Run(), 0; }
void Run();
private:
ThreadHandle_t m_hHandle;
CThreadEvent m_hRequestResultsEvent; // Auto reset event to trigger next query
CQosDetector m_QosDetector;
}
s_QosThread;
CQosThread::CQosThread() : m_hHandle( NULL )
{
}
void CQosThread::Run()
{
//
// Sit here and fetch fresh QOS results whenever somebody needs them.
// Every request of QOS data is instantaneous and returns the last successful QOS query result.
//
for ( unsigned int numQosRequestsMade = 0; ; ++ numQosRequestsMade )
{
m_QosDetector.InitiateLookup();
m_QosDetector.WaitForResults();
if ( numQosRequestsMade )
{
m_hRequestResultsEvent.Wait();
}
}
ReleaseThreadHandle( m_hHandle );
m_hHandle = NULL;
}
MM_QOS_t CQosThread::GetResults()
{
// Launch the thread if this is the first time QOS is needed
if ( !m_hHandle )
{
m_hHandle = CreateSimpleThread( ThreadProc, this );
if( m_hHandle )
{
ThreadSetAffinity( m_hHandle, XBOX_PROCESSOR_3 );
}
}
// Signal the event that we can make a fresh QOS query
m_hRequestResultsEvent.Set();
return m_QosDetector.GetResults();
}
//
// Function to retrieve the result of the last QOS query
//
MM_QOS_t MM_GetQos()
{
return s_QosThread.GetResults();
}
#else
//
// Default implementation of QOS
//
static struct Default_MM_QOS_t : public MM_QOS_t
{
Default_MM_QOS_t()
{
nPingMsMin = 50; // 50 ms default ping
nPingMsMed = 50; // 50 ms default ping
flBwUpKbs = 32.0f; // 32 KB/s = 256 kbps
flBwDnKbs = 32.0f; // 32 KB/s = 256 kbps
flLoss = 0.0f; // 0% packet loss
}
}
s_DefaultQos;
MM_QOS_t MM_GetQos()
{
return s_DefaultQos;
}
#endif
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