tunemem.cpp

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// $Id: tunemem.cpp 1282 2006-06-09 09:46:49Z alex $
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----------------------------------

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=================================XARAHEADEREND============================
 */
// Tuned Memory manager

/*
*/

#include "camtypes.h"
#include "tunemem.h"
//#include "errors.h" - in camtypes.h [AUTOMATICALLY REMOVED]
//#include "fixmem.h" - in camtypes.h [AUTOMATICALLY REMOVED]

// An implement to match the Declare in the .h file.
CC_IMPLEMENT_MEMDUMP(TunedMemory, CC_CLASS_MEMDUMP)

// This will get Camelot to display the filename and linenumber of any memory allocations
// that are not released at program exit
// Declare smart memory handling in Debug builds
#define new CAM_DEBUG_NEW

//static BOOL ShowBandingRAM = FALSE;

// Defaults for smart banding
BOOL TunedMemory::RecommendInfinite = FALSE;
INT32 TunedMemory::RecommendRAM = 1024*768;

/********************************************************************************************

    Preference: MaxRenderingRAM
    Section:    
    Range:      >128K
    Purpose:    This pref is used to set the maximum amount of ram that can be used to
                render with. If there is less than the screen needs here, the rendering
                will be banded. Useful on Low memory machines.

********************************************************************************************/

size_t TunedMemory::LimitRAM        = 1024*768;
size_t TunedMemory::TotalRAM        = 1024*768;
size_t TunedMemory::AvailableRAM    = 1024*768; // Make this the same!



/********************************************************************************************

    Preference: IsRenderingRAMInfinte
    Section:    
    Range:      TRUE, FALSE
    Purpose:    If this pref is TRUE then the MaxRenderingRAM preference is ignored and all
                the ram we want is used. If it is FALSE the rendering ram will be limited
                to the figure in MaxRenderingRAM

********************************************************************************************/

BOOL TunedMemory::IsInfinite = TRUE;


/********************************************************************************************

    Preference: SmartRenderingRAM
    Section:    
    Range:      TRUE, FALSE
    Purpose:    If this pref is TRUE then the MaxRenderingRAM preference is ignored and 
                the amount to use is calculated according to available memory. 
                If it is FALSE the rendering ram will be limited to the figure in 
                MaxRenderingRAM

********************************************************************************************/

BOOL TunedMemory::SmartBanding = TRUE;


/********************************************************************************************

>   TunedMemory::TunedMemory()

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    1/5/95
    Purpose:    Constructor - sets the memory thing up with a default value of 1Mb of
                available ram

********************************************************************************************/

TunedMemory::TunedMemory()
{
    // make sure that the available ram is the same as the total
    AvailableRAM = TotalRAM = LimitRAM;
}





/********************************************************************************************

>   TunedMemory::~TunedMemory()

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    1/5/95
    Purpose:    Destructor - TRACES an error out if there is still some ram left over

********************************************************************************************/

TunedMemory::~TunedMemory()
{
    if (AvailableRAM!=TotalRAM)
    {
        TRACEUSER( "Rik", wxT("At Exit the Available Ram did not equal the Total Ram in TunedMemory\n") );
        TRACEUSER( "Rik", wxT("TotalRAM = %ld, Available=%ld\n"), TotalRAM, AvailableRAM );
    }
}





/********************************************************************************************

>   LPVOID TunedMemory::LimitedCCMalloc(UINT32 Size)

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    1/5/95
    Inputs:     Size - the ammount of ram needed
    Returns:    A pointer to the allocated ram or NULL if there is no more ram available
    Purpose:    Allocates ram out of the limited pool. The Available ram is decreased.
    SeeAlso:    LimitedCCFree

********************************************************************************************/

LPVOID TunedMemory::LimitedCCMalloc(size_t Size)
{
    // Get some ram
    LPVOID Memory = CCMalloc(Size);

    // if we got it, make a note of its allocation
    if ((Memory!=NULL) && (!IsInfinite))
    {
        AvailableRAM -= Size;
    }

    // return what we got
    return Memory;
}

/********************************************************************************************

>   LPVOID TunedMemory::LimitedCCRealloc(LPVOID buf, UINT32 NewSize)

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    5/7/95
    Inputs:     Size - the new ammount of ram needed
    Returns:    A pointer to the allocated ram or NULL if there is no more ram available
    Purpose:    Re-Allocates ram out of the limited pool. The Available ram is decreased.
    SeeAlso:    LimitedCCFree

********************************************************************************************/

LPVOID TunedMemory::LimitedCCRealloc(LPVOID buf, size_t NewSize)
{
    // Find out how big the block is at the moment
    size_t OldSize = CCGetBlockSize(buf); 

    // Resize the block
    LPVOID Memory = CCRealloc( buf, NewSize );

    // If it got bigger, then decrease the available RAM,
    // otherwise we increase it
    if ((Memory!=NULL) && (!IsInfinite))
    {
        AvailableRAM -= (NewSize - OldSize);
    }

    // return what we got
    return Memory;
}




/********************************************************************************************

>   void TunedMemory::LimitedCCFree(LPVOID buf)

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    1/5/95
    Inputs:     buf - the previously allocated buffer
    Purpose:    Frees the memory allocated by LimitedCCMalloc

********************************************************************************************/

void TunedMemory::LimitedCCFree(LPVOID buf)
{
    // Find out how big the block was
    size_t BlockSize = CCGetBlockSize(buf); 

    // add it back into the pool
    if (!IsInfinite)
        AvailableRAM += BlockSize;

    // Free the memory
    CCFree(buf);
}





/********************************************************************************************

>   INT32 TunedMemory::GetTotalTunedMem()

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    1/5/95
    Returns:    Total ram in the limited heap
    Purpose:    Finds out the total ram that can be allocated in the limited memory thing.
                This is how much ram the user has deemed enough for Camelot to do its
                rendering etc with. When this ammount has been allocated rendering will
                have to wait for other regions to finish before they can start.
    SeeAlso:    TunedMemory::GetAvailableTunedMem

********************************************************************************************/

size_t TunedMemory::GetTotalTunedMem()
{
    return TotalRAM;
}





/********************************************************************************************

>   INT32 TunedMemory::GetAvailableTunedMem()

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    1/5/95
    Returns:    The amount of available ram in the limited pool
    Purpose:    This is the amount of the ram that could be allocated (GetTotal) that is
                still left unallocated. If this amount is not enough for your job, then
                you should wait until this function returns a bigger number. It would also
                be worth checking to see if the TotalTunedRam would be enough as well.

********************************************************************************************/

size_t TunedMemory::GetAvailableTunedMem()
{
    return AvailableRAM;
}



/********************************************************************************************

>   static INT32 TunedMemory::GetLimitedMemSize()

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    4/5/95
    Returns:    The current size of the limited memory thing
    Purpose:    To allows the Options Dialog to find out what the current setting for the
                amount of RAM that can be used for rendering is at.

********************************************************************************************/

size_t TunedMemory::GetLimitedMemSize()
{
    return LimitRAM;
}



/********************************************************************************************

>   static void TunedMemory::SetLimitedMemSize(INT32 NewSize)

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    4/5/95
    Inputs:     NewSize - The new size of the limited memory heap
    Returns:    NewSize if ok or if the value is too low, a new minimum size. 
    Purpose:    This function allows the options dialog to set the amount of ram to use
                for drawing to a new value that the user chose. If the value is less than
                a minimum useful value, at present 128k, then the value will be ignored and
                128k will be used.

********************************************************************************************/

size_t TunedMemory::SetLimitedMemSize(size_t NewSize)
{
    // make sure it is not too small for safty
    if (NewSize<1024*128)
        NewSize = 1024*128;

    // Find out what the difference is
    size_t Difference = NewSize - TotalRAM;

    // Set the total to the new size
    TotalRAM = NewSize;
    LimitRAM = NewSize;

    // And change the available ram as well
    AvailableRAM += Difference;
    
    return NewSize;
}



/********************************************************************************************

>   static BOOL TunedMemory::IsMemSizeInfinite()

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    4/5/95
    Returns:    TRUE if the Limited heap is not currently limited, FALSE if it is
    Purpose:    Lets the options dialog have a look at the Tuned Memorys IsInfinite state.

********************************************************************************************/

BOOL TunedMemory::IsMemSizeInfinite()
{
    return IsInfinite;
}

/********************************************************************************************

>   static BOOL TunedMemory::IsAutomaticMemory()

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    16/6/95
    Returns:    TRUE if the memory limit will be calculated automatically.
                FALSE if the user value is being used.
    Purpose:    Lets the options dialog have a look at the Smart banding state.

********************************************************************************************/

BOOL TunedMemory::IsAutomaticMemory()
{
    // This routine has been changed to determine whether to use the
    // recommended memory or not.
    return SmartBanding;
}


/********************************************************************************************

>   static void TunedMemory::SetMemSizeInfinte(BOOL NewIsInfinite)

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    4/5/95
    Inputs:     NewIsInfinite - The new state of the Infinte flag
    Purpose:    Sets the infinte flag in the limited memory manager. TRUE means the limited
                heap should be made infinte, FALSE means use the value found by
                GetLimitedMemSize
                NOTE: This call now determines whether to use the recommended memory
                      or not.

********************************************************************************************/

void TunedMemory::SetMemSizeInfinte(BOOL NewSmartBanding)
{
    // Set the member version
    SmartBanding = NewSmartBanding;

    if (SmartBanding)
    {
        // If 'Smart' banding enabled, then use the 
        // recommended memory (calculated on startup)
        IsInfinite  = RecommendInfinite;

        if (!IsInfinite)
        {
            // Set the recommended memory limit

            // Find out what the difference is
            size_t      Difference = RecommendRAM - TotalRAM;

            // Set the total to the new size
            TotalRAM = RecommendRAM;

            // And change the available ram as well
            AvailableRAM += Difference;
        }
    }
    else
    {
        // Use the user specified limited RAM
        IsInfinite = FALSE;
        TotalRAM = LimitRAM;
        AvailableRAM = LimitRAM;
    }
}




/********************************************************************************************

>   static INT32 TunedMemory::GetScreenMemSize()

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    4/5/95
    Returns:    The mem required to do a full screen redraw with transparancy on
    Purpose:    This function gives a figure for the amount of ram needed to redraw
                the full screen with transparency on. for 1024 x 768 this is about 3.5Meg

********************************************************************************************/

INT32 TunedMemory::GetScreenMemSize()
{
    INT32                   Width  = wxSystemSettings::GetMetric( wxSYS_SCREEN_X );
    INT32                   Height = wxSystemSettings::GetMetric( wxSYS_SCREEN_Y );
    return Width * Height * 4;
}




/********************************************************************************************

>   static BOOL Init()

    Author:     Rik_Heywood (Xara Group Ltd) <camelotdev@xara.com>
    Created:    4/5/95
    Returns:    TRUE if it worked, FALSE if not
    Purpose:    Declares the preferences for this class in the ini file.

********************************************************************************************/

BOOL TunedMemory::Init()
{
    if( Camelot.DeclareSection( wxT("Screen"), 10 ) )
    { 
        Camelot.DeclarePref( NULL, wxT("MaxRenderingRAM"), (INT32*)&LimitRAM );
        Camelot.DeclarePref( NULL, wxT("IsRenderingRAMInfinte"), &IsInfinite, FALSE, TRUE );
        Camelot.DeclarePref( NULL, wxT("SmartRenderingRAM"), &SmartBanding, FALSE, TRUE );

//      Camelot.DeclarePref(NULL, "ShowBandingRAM", &ShowBandingRAM, FALSE, TRUE);
    }

    // Find the available Physical memory,
    // and work out a sensible band size to use
    CalculateRecommendedMemory();

    if (SmartBanding)
    {
        // Use the recommended memory
        TotalRAM    = RecommendRAM;
        IsInfinite  = RecommendInfinite;
    }
    else
    {
        // Use the user specified limited RAM
        TotalRAM    = LimitRAM;
    }

    // Set available ram equal to the total ram
    AvailableRAM = TotalRAM;
    return TRUE;
}

/********************************************************************************************

>   void TunedMemory::CalculateRecommendedMemory()

    Author:     Will_Cowling (Xara Group Ltd) <camelotdev@xara.com>
    Created:    16/6/95
    Purpose:    Calculates a sensible default Banding size given the Physical memory
                available.

********************************************************************************************/

void TunedMemory::CalculateRecommendedMemory()
{
    TRACE( _T("Warning - TunedMemory::CalculateRecommendedMemory called") );

#if defined(__WXMSW)
    MEMORYSTATUS MemStat;
    MemStat.dwLength = sizeof(MEMORYSTATUS);
    GlobalMemoryStatus(&MemStat);

    INT32 PhysicalMemory = MemStat.dwTotalPhys;
    TRACEALL( wxT("Total Physical Memory is %d\n"), PhysicalMemory);

//  INT32 ScreenMem = GetScreenMemSize();
//  TRACEALL( _T("Screen Memory is %d\n"), ScreenMem);

    if (PhysicalMemory <= 8*1024*1024)          // 8 Megs or less
    {
        RecommendInfinite = FALSE;              // Use limited memory
        RecommendRAM = 512*1024;                // Limit to max of 512 K
    }
    else if (PhysicalMemory <= 12*1024*1024)    // 8 to 12 Megs
    {
        RecommendInfinite = FALSE;              // Use limited memory
        RecommendRAM = 1*1024*1024;             // Limit to max of 1024 K
    }
    else if (PhysicalMemory <= 16*1024*1024)    // 12 to 16 Megs
    {
        RecommendInfinite = FALSE;              // Use limited memory
        RecommendRAM = 2*1024*1024;             // Limit to max of 2048 K
    }
    else                                        // More than 16 Megs
    {
        RecommendInfinite = TRUE;               // Unlimited memory
    }

    if (ShowBandingRAM)
    {
        ERROR3_PF( ("Total Physical Memory is %d", PhysicalMemory) );

        if (IsInfinite)
        {
            ERROR3("Using unlimited banding RAM");
            TRACEALL( wxT("Using unlimited Rendering RAM\n") );
        }
        else
        {
            ERROR3_PF( ("Rendering RAM set to %d",TotalRAM) );
            TRACEALL( wxT("Rendering RAM set to %d\n"), TotalRAM );
        }
    }
#else
    RecommendInfinite = TRUE;
#endif
}

---