User: ehyche  Date: 02/12/11 05:24:32
Added
 /common/system/
  pxtimer.cpp
 /common/system/pub/
  pxtimer.h

Modified
 /common/system/
  Umakefil

Log
 Add pxtimer.cpp

File Changes:

Directory: /common/system/
==========================

File [changed]: Umakefil
Url: https://common.helixcommunity.org/source/browse/common/system/Umakefil.diff?r1=1.1.1.1&r2=1.2
Delta lines:  +2 -1
-------------------
--- Umakefil	18 Oct 2002 01:45:08 -0000	1.1.1.1
+++ Umakefil	11 Dec 2002 13:24:32 -0000	1.2
@@ -45,7 +45,8 @@
                    "hxdate.cpp",
                    "hxrquest.cpp",
                    "genthrd.cpp",
-		   "pq.cpp")
+		   "pq.cpp",
+                   "pxtimer.cpp")
 
 if project.BuildOption('nodll'):
     project.AddSources("stataccs.cpp", "staticff.cpp")

File [added]: pxtimer.cpp
Url: https://common.helixcommunity.org/source/browse/common/system/pxtimer.cpp?rev=1.1&content-type=text/vnd.viewcvs-markup
Added lines: 201
----------------
// include
#include "hxtypes.h"
#include "hxcom.h"
#include "hxengin.h"

// pnmisc
#include "baseobj.h"

// pxcomlib
#include "pxtimer.h"

// pndebug
#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE		
static char HX_THIS_FILE[] = __FILE__;
#endif

PXTimer::PXTimer()
{
    m_lRefCount        = 0;
    m_ulState          = kStateConstructed;
    m_ulInstance       = 0;
    m_ulInterval       = 0;
    m_pScheduler       = NULL;
    m_pResponse        = NULL;
    m_ulCallbackHandle = 0;
    m_bCallbackPending = FALSE;
    m_bInsideTimerFire = FALSE;
}

PXTimer::~PXTimer()
{
    Deallocate();
}

void PXTimer::Deallocate()
{
    if (IsCallbackPending())
    {
        RemovePendingCallback();
    }
    HX_RELEASE(m_pScheduler);
    HX_RELEASE(m_pResponse);
}

STDMETHODIMP PXTimer::QueryInterface(REFIID riid, void** ppvObj)
{
    HX_RESULT retVal = HXR_OK;

    if (IsEqualIID(riid, IID_IUnknown))
    {
        AddRef();
        *ppvObj = (IUnknown*) this;
    }
    else if (IsEqualIID(riid, IID_IHXCallback))
    {
        AddRef();
        *ppvObj = (IHXCallback*) this;
    }
    else
    {
        *ppvObj = NULL;
        retVal  = HXR_NOINTERFACE;
    }

    return retVal;
}

STDMETHODIMP_(UINT32) PXTimer::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}

STDMETHODIMP_(UINT32) PXTimer::Release()
{
    
    if (InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }

    delete this;

    return 0;
}

STDMETHODIMP PXTimer::Func()
{
    HX_RESULT retVal = HXR_OK;

    if (m_pScheduler && m_pResponse)
    {
        // Schedule another callback m_ulInterval
        // milliseconds from now
        m_ulCallbackHandle = m_pScheduler->RelativeEnter(this, m_ulInterval);
        // Set the callback pending flag
        m_bCallbackPending = TRUE;
        // Make sure we don't allow re-entrancy
        // into TimerFire().
        if (!m_bInsideTimerFire)
        {
            // Set the re-entrancy flag
            m_bInsideTimerFire = TRUE;
            // Call TimerFire on the response interface
            m_pResponse->TimerFire(m_ulInstance);
            // Clear the re-entrancy flag
            m_bInsideTimerFire = FALSE;
        }
    }

    return retVal;
}

HX_RESULT PXTimer::Init(UINT32           ulInstance,
                        IUnknown*        pContext,
                        PXTimerResponse* pResponse)
{
    HX_RESULT retVal = HXR_OK;

    if (pContext && pResponse)
    {
        // Clear out everything if necessary
        Deallocate();
        // Init members
        retVal = pContext->QueryInterface(IID_IHXScheduler,
                                          (void**) &m_pScheduler);
        if (SUCCEEDED(retVal))
        {
            // Save the members
            m_ulInstance       = ulInstance;
            m_pResponse        = pResponse;
            m_ulCallbackHandle = 0;
            m_bCallbackPending = FALSE;
            m_pResponse->AddRef();
            // Set the state
            m_ulState = kStateInitialized;
        }
    }
    else
    {
        retVal = HXR_INVALID_PARAMETER;
    }

    return retVal;
}

HX_RESULT PXTimer::StartTimer(UINT32 ulInterval)
{
    HX_RESULT retVal = HXR_OK;

    if (m_ulState == kStateConstructed)
    {
        retVal = HXR_NOT_INITIALIZED;
    }
    else if (m_ulState == kStateInitialized)
    {
        if (ulInterval >= kMinInterval)
        {
            // Save the interval
            m_ulInterval = ulInterval;
            // Schedule the first callback
            m_ulCallbackHandle = m_pScheduler->RelativeEnter(this, m_ulInterval);
            // Set the callback flag
            m_bCallbackPending = TRUE;
            // Set the state
            m_ulState = kStateActive;
        }
        else
        {
            retVal = HXR_INVALID_PARAMETER;
        }
    }
    else if (m_ulState == kStateActive)
    {
        // Timer is already started, so no need to
        // do anything...
    }

    return retVal;
}

void PXTimer::StopTimer()
{
    if (m_ulState == kStateConstructed ||
        m_ulState == kStateInitialized)
    {
        // Timer has not been started; therefore,
        // we don't need to do anything to stop it.
    }
    else if (m_ulState == kStateActive)
    {
        // Remove any pending callback
        if (IsCallbackPending())
        {
            RemovePendingCallback();
        }
        // Reset the state
        m_ulState = kStateInitialized;
    }
}

Directory: /common/system/pub/
==============================

File [added]: pxtimer.h
Url: https://common.helixcommunity.org/source/browse/common/system/pub/pxtimer.h?rev=1.1&content-type=text/vnd.viewcvs-markup
Added lines: 87
---------------
#ifndef PXTIMER_H
#define PXTIMER_H

// Forward declarations
typedef _INTERFACE IHXCallback  IHXCallback;
typedef _INTERFACE IHXScheduler IHXScheduler;
class CHXBaseCountingObject;

class PXTimerResponse : public IUnknown
{
public:
    // IUnknown methods
    STDMETHOD(QueryInterface)   (THIS_ REFIID riid, void **ppvObj) PURE;
    STDMETHOD_(ULONG32,AddRef)  (THIS) PURE;
    STDMETHOD_(ULONG32,Release) (THIS) PURE;

    // PXTimerResponse methods
    STDMETHOD(TimerFire) (THIS_ UINT32 ulInstance) PURE;
};

class PXTimer : public CHXBaseCountingObject,
                public IHXCallback
{
public:
    PXTimer();
    virtual ~PXTimer();

    // IUnknown methods
    STDMETHOD(QueryInterface)   (THIS_ REFIID riid, void **ppvObj);
    STDMETHOD_(ULONG32,AddRef)  (THIS);
    STDMETHOD_(ULONG32,Release) (THIS);

    // IHXCallback methods
    STDMETHOD(Func)             (THIS);

    // PXTimer methods
    HX_RESULT Init(UINT32           ulInstance,
                   IUnknown*        pContext,
                   PXTimerResponse* pResponse);
    HX_RESULT StartTimer(UINT32 ulInterval);
    void      StopTimer();
    BOOL      IsStarted();
protected:
    enum
    {
        kStateConstructed,
        kStateInitialized,
        kStateActive,
        kMinInterval = 33
    };

    INT32            m_lRefCount;
    UINT32           m_ulState;
    UINT32           m_ulInstance;
    UINT32           m_ulInterval;
    IHXScheduler*   m_pScheduler;
    PXTimerResponse* m_pResponse;
    UINT32           m_ulCallbackHandle;
    BOOL             m_bCallbackPending;
    BOOL             m_bInsideTimerFire;

    void Deallocate();
    BOOL IsCallbackPending();
    void RemovePendingCallback();
};

inline BOOL PXTimer::IsCallbackPending()
{
    return m_bCallbackPending;
}

inline void PXTimer::RemovePendingCallback()
{
    if (m_bCallbackPending && m_pScheduler)
    {
        m_pScheduler->Remove(m_ulCallbackHandle);
        m_bCallbackPending = FALSE;
        m_ulCallbackHandle = 0;
    }
}

inline BOOL PXTimer::IsStarted()
{
    return (m_ulState == kStateActive ? TRUE : FALSE);
}

#endif




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