C++ GetPageSize函數代碼示例

const char * MmapWrapperWriteAndReadMemoryAccess()
{
#if defined(TARGET_MAC)
    return reinterpret_cast<const char *> (mmap(0, GetPageSize(), PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0));
#else
   return reinterpret_cast<const char *> (mmap(0, GetPageSize(), PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0));
#endif
}

void CRoundSliderCtrl::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	const int nMin = GetRangeMin();
	const int nMax = GetRangeMax()+1;

	switch(nChar)
	{
	case VK_LEFT:
	case VK_UP:
		{
			int nNewPos = GetPos()-GetLineSize();
			while(nNewPos < nMin) nNewPos += (nMax - nMin);
			SetPos(nNewPos);
			RedrawWindow();
			PostMessageToParent(TB_LINEUP);
		}
		break;
	
	case VK_RIGHT:
	case VK_DOWN:
		{
			int nNewPos = GetPos()+GetLineSize();
			while(nNewPos >= nMax) nNewPos -= (nMax - nMin);
			SetPos(nNewPos);
			RedrawWindow();
			PostMessageToParent(TB_LINEDOWN);
		}
		break;

	case VK_PRIOR:
		{
			int nNewPos = GetPos()-GetPageSize();
			while(nNewPos < nMin) nNewPos += (nMax - nMin);
			SetPos(nNewPos);
			RedrawWindow();
			PostMessageToParent(TB_PAGEUP);
		}
		break;

	case VK_NEXT:
		{
			int nNewPos = GetPos()+GetPageSize();
			while(nNewPos >= nMax) nNewPos -= (nMax - nMin);
			SetPos(nNewPos);
			RedrawWindow();
			PostMessageToParent(TB_PAGEDOWN);
		}
		break;

	case VK_HOME:
	case VK_END:
		// Do nothing (ignore keystroke)
		break;

	default:
		CSliderCtrl::OnKeyDown(nChar, nRepCnt, nFlags);
	}
}

static int tsk_pagesize(RIOMach *riom) {
#define GetPageSize(x) (host_page_size (riom->task, x) == KERN_SUCCESS)
	static vm_size_t pagesize = 0;
	return pagesize ? pagesize
		: GetPageSize (&pagesize)
			? pagesize : 4096;
}

bool wxNotebook::MSWPrintChild(WXHDC hDC, wxWindow *child)
{
    // solid background colour overrides themed background drawing
    if ( !UseBgCol() && DoDrawBackground(hDC, child) )
        return true;

    // If we're using a solid colour (for example if we've switched off
    // theming for this notebook), paint it
    if (UseBgCol())
    {
        wxRect r = GetPageSize();
        if ( r.IsEmpty() )
            return false;

        RECT rc;
        wxCopyRectToRECT(r, rc);

        // map rect to the coords of the window we're drawing in
        if ( child )
            ::MapWindowPoints(GetHwnd(), GetHwndOf(child), (POINT *)&rc, 2);

        wxBrush brush(GetBackgroundColour());
        HBRUSH hbr = GetHbrushOf(brush);

        ::FillRect((HDC) hDC, &rc, hbr);

        return true;
    }

    return wxNotebookBase::MSWPrintChild(hDC, child);
}

bool wxNotebook::SetPageText(size_t nPage, const wxString& strText)
{
    wxCHECK_MSG( IS_VALID_PAGE(nPage), false, wxT("notebook page out of range") );

    TC_ITEM tcItem;
    tcItem.mask = TCIF_TEXT;
    tcItem.pszText = wxMSW_CONV_LPTSTR(strText);

    if ( !HasFlag(wxNB_MULTILINE) )
        return TabCtrl_SetItem(GetHwnd(), nPage, &tcItem) != 0;

    // multiline - we need to set new page size if a line is added or removed
    int rows = GetRowCount();
    bool ret = TabCtrl_SetItem(GetHwnd(), nPage, &tcItem) != 0;

    if ( ret && rows != GetRowCount() )
    {
        const wxRect r = GetPageSize();
        const size_t count = m_pages.Count();
        for ( size_t page = 0; page < count; page++ )
            m_pages[page]->SetSize(r);
    }

    return ret;
}

int main(int nargs, char **args)
{
   size_t pgsz;
   int MaxL1Size;
   int muladd, lat, lbnreg, L1Size, mmnreg, nkflop;
   FILE *fpout;
   char pre;

   if (nargs != 3)
   {
      fprintf(stderr, "USAGE: %s <pre> <file>\n", args[0]);
      exit(-1);
   }
   pre = *args[1];

   L1Size = 1024 * GetL1CacheSize(64);
   if (pre == 'd') L1Size /= ATL_dsize;
   else if (pre == 's') L1Size /= ATL_ssize;
   else if (pre == 'z') L1Size /= ATL_csize;
   else if (pre == 'c') L1Size /= ATL_zsize;
   getfpinfo(pre, &muladd, &lat, &lbnreg, &nkflop);
   pgsz = GetPageSize();
   CreateHeader(pre, args[2], L1Size, muladd, lat, lbnreg, nkflop, 0, pgsz);
   mmnreg = getmmnreg(pre);
   CreateHeader(pre, args[2], L1Size, muladd, lat, lbnreg, nkflop, mmnreg,pgsz);
   return(0);
}

int wxNotebook::HitTest(const wxPoint& pt, long *flags) const
{
    TC_HITTESTINFO hitTestInfo;
    hitTestInfo.pt.x = pt.x;
    hitTestInfo.pt.y = pt.y;
    int item = TabCtrl_HitTest(GetHwnd(), &hitTestInfo);

    if ( flags )
    {
        *flags = 0;

        if ((hitTestInfo.flags & TCHT_NOWHERE) == TCHT_NOWHERE)
            *flags |= wxBK_HITTEST_NOWHERE;
        if ((hitTestInfo.flags & TCHT_ONITEM) == TCHT_ONITEM)
            *flags |= wxBK_HITTEST_ONITEM;
        if ((hitTestInfo.flags & TCHT_ONITEMICON) == TCHT_ONITEMICON)
            *flags |= wxBK_HITTEST_ONICON;
        if ((hitTestInfo.flags & TCHT_ONITEMLABEL) == TCHT_ONITEMLABEL)
            *flags |= wxBK_HITTEST_ONLABEL;
        if ( item == wxNOT_FOUND && GetPageSize().Contains(pt) )
            *flags |= wxBK_HITTEST_ONPAGE;
    }

    return item;
}

/*----------------------------------------------------------------------
 *       Class:  AmayaScrollBar
 *      Method:  OnScroll
 * Description:  
  -----------------------------------------------------------------------*/
void AmayaScrollBar::OnScroll( wxScrollEvent& event )
{
  /* this flag is necessary because 2 events occure when up/down button
     is pressed (it's an optimisation)
     this hack works because OnLineDown is called before OnScroll,
     but becareful the events orders could change in future wxWidgets
     releases or can be platform specific
  */
  if (m_IgnoreNextScrollEvent)
    {
      m_IgnoreNextScrollEvent = FALSE;
      event.Skip();
      return;
    }
  
  if (event.GetOrientation() == wxHORIZONTAL)
    {
      TTALOGDEBUG_3( TTA_LOG_DIALOG, _T("AmayaScrollBar::OnScroll [wxHORIZONTAL][frameid=%d][pos=%d][pagesize=%d]"), m_ParentFrameID, event.GetPosition(), GetPageSize() );
      FrameHScrolledCallback( m_ParentFrameID,
                              event.GetPosition(),
                              GetPageSize() );
    }
  else if (event.GetOrientation() == wxVERTICAL)
    {
      TTALOGDEBUG_3( TTA_LOG_DIALOG, _T("AmayaScrollBar::OnScroll [wxVERTICAL][frameid=%d][pos=%d][pagesize=%d]"), m_ParentFrameID, event.GetPosition(), GetPageSize() );
      FrameVScrolledCallback( m_ParentFrameID,
                              event.GetPosition() );
    }
}

WXHBRUSH wxNotebook::QueryBgBitmap()
{
    wxRect r = GetPageSize();
    if ( r.IsEmpty() )
        return 0;

    wxUxThemeHandle theme(this, L"TAB");
    if ( !theme )
        return 0;

    RECT rc;
    wxCopyRectToRECT(r, rc);

    WindowHDC hDC(GetHwnd());
    wxUxThemeEngine::Get()->GetThemeBackgroundExtent
                            (
                                theme,
                                (HDC) hDC,
                                9 /* TABP_PANE */,
                                0,
                                &rc,
                                &rc
                            );

    MemoryHDC hDCMem(hDC);
    CompatibleBitmap hBmp(hDC, rc.right, rc.bottom);

    SelectInHDC selectBmp(hDCMem, hBmp);

    if ( !DoDrawBackground((WXHDC)(HDC)hDCMem) )
        return 0;

    return (WXHBRUSH)::CreatePatternBrush(hBmp);
}

void CXFA_FFPageView::GetDisplayMatrix(CFX_Matrix& mt,
                                       const CFX_Rect& rtDisp,
                                       int32_t iRotate) const {
  CFX_SizeF sz = GetPageSize();
  CFX_RectF fdePage;
  fdePage.Set(0, 0, sz.x, sz.y);
  GetPageMatrix(mt, fdePage, rtDisp, iRotate, 0);
}

/*!
 * Test the PIN_SafeCopy() function in the following scenarios:
 * A. Successful copy of an entire memory region
 * B. Partial copy of a memory region, whose tail is inaccessible
 * C. Failure to copy an inaccessible memory region
 */
VOID SafeCopyTest()
{
    size_t pageSize = GetPageSize();

    CHAR * src = (CHAR *)MemAlloc(2*pageSize);
    ASSERTX(src != 0);
    CHAR * srcBuf = src + 1; // +1 for testing unaligned access


    CHAR * dst = (CHAR *)MemAlloc(2*pageSize);
    ASSERTX(dst != 0);
    CHAR * dstBuf = dst + 1; // +1 for testing unaligned access

    size_t bufSize = 2*pageSize - 1;
    size_t halfBufSize = pageSize - 1;
    size_t copySize;

    //A.
    for (unsigned int i = 0; i < bufSize; ++i)
    {
        src[i] = i/256;
        dst[i] = 0;
    }
    copySize = PIN_SafeCopy(dstBuf, srcBuf, bufSize); 
    ASSERT(((copySize == bufSize) && (memcmp(dstBuf, srcBuf, bufSize) == 0)), "SafeCopy (A) failed.\n");
    out << "SafeCopy (A): Entire buffer has been copied successfully." << endl << flush;

    //B.
    for (unsigned int i = 0; i < pageSize; ++i)
    {
        dst[i] = 0;
    }
    MemProtect(src + pageSize, pageSize, FALSE); // second half of src is inaccessible
    copySize = PIN_SafeCopy(dstBuf, srcBuf, bufSize); 
    ASSERT(((copySize == halfBufSize) && (memcmp(dstBuf, srcBuf, halfBufSize) == 0)), "SafeCopy (B) failed.\n");

    // Check to see that all accessible bytes near the end of the first page are copied successfully
    for (unsigned int sz = 1; sz < 16; ++sz)
    {
        for (unsigned int i = 0; i < sz; ++i)
        {
            dstBuf[i] = 0;
        }
        copySize = PIN_SafeCopy(dstBuf, src + pageSize - sz, pageSize); 
        ASSERT(((copySize == sz) && (memcmp(dstBuf, src + pageSize - sz, sz) == 0)), "SafeCopy (B) failed.\n");
    }

    out << "SafeCopy (B): Accessible part of the buffer has been copied successfully."  << endl << flush;

    //C.
    MemProtect(dst, pageSize, FALSE); // dst is inaccessible
    copySize = PIN_SafeCopy(dstBuf, srcBuf, bufSize); 
    ASSERT((copySize == 0), "SafeCopy (C) failed.\n");
    out << "SafeCopy (C): Inaccessible buffer has not been copied."  << endl << flush;

    MemFree(src, 2*pageSize);
    MemFree(dst, 2*pageSize);
}

void wxNotebook::AdjustPageSize(wxNotebookPage *page)
{
    wxCHECK_RET( page, wxT("NULL page in wxNotebook::AdjustPageSize") );

    const wxRect r = GetPageSize();
    if ( !r.IsEmpty() )
    {
        page->SetSize(r);
    }
}

void ScrollBarHorizontal::SetPos(float pos)
{
	ScrollBarBase::SetPos(pos);

	float mult = GetShowButtons() ? 1.0f : 0.0f;
	_btnBox->Resize(std::max(GetScrollPaneLength() * GetPageSize() / GetDocumentSize(), _btnBox->GetTextureWidth()),
		_btnBox->GetHeight());
	_btnBox->Move(floorf(_btnUpLeft->GetWidth() * mult + (GetWidth() - _btnBox->GetWidth()
		- (_btnUpLeft->GetWidth() + _btnDownRight->GetWidth()) * mult) * GetPos() / (GetDocumentSize() - GetPageSize()) + 0.5f), _btnBox->GetY());
}

bool wxWizard::ResizeBitmap(wxBitmap& bmp)
{
    if (!GetBitmapPlacement())
        return false;

    if (bmp.Ok())
    {
        wxSize pageSize = m_sizerPage->GetSize();
        if (pageSize == wxSize(0,0))
            pageSize = GetPageSize();
        int bitmapWidth = wxMax(bmp.GetWidth(), GetMinimumBitmapWidth());
        int bitmapHeight = pageSize.y;

        if (!m_statbmp->GetBitmap().Ok() || m_statbmp->GetBitmap().GetHeight() != bitmapHeight)
        {
            wxBitmap bitmap(bitmapWidth, bitmapHeight);
            {
                wxMemoryDC dc;
                dc.SelectObject(bitmap);
                dc.SetBackground(wxBrush(m_bitmapBackgroundColour));
                dc.Clear();

                if (GetBitmapPlacement() & wxWIZARD_TILE)
                {
                    TileBitmap(wxRect(0, 0, bitmapWidth, bitmapHeight), dc, bmp);
                }
                else
                {
                    int x, y;

                    if (GetBitmapPlacement() & wxWIZARD_HALIGN_LEFT)
                        x = 0;
                    else if (GetBitmapPlacement() & wxWIZARD_HALIGN_RIGHT)
                        x = bitmapWidth - bmp.GetWidth();
                    else
                        x = (bitmapWidth - bmp.GetWidth())/2;

                    if (GetBitmapPlacement() & wxWIZARD_VALIGN_TOP)
                        y = 0;
                    else if (GetBitmapPlacement() & wxWIZARD_VALIGN_BOTTOM)
                        y = bitmapHeight - bmp.GetHeight();
                    else
                        y = (bitmapHeight - bmp.GetHeight())/2;

                    dc.DrawBitmap(bmp, x, y, true);
                    dc.SelectObject(wxNullBitmap);
                }
            }

            bmp = bitmap;
        }
    }

    return true;
}

/*!
 * The main procedure of the application.
 */
int main(int argc, char *argv[])
{
    cerr << "SMC in the image of the application" << endl;

    // buffer to move foo/bar routines into and execute
    static char staticBuffer[PI_FUNC::MAX_SIZE];
    // Set read-write-execute protection for the buffer 
    size_t pageSize = GetPageSize();
    char * firstPage = (char *)(((size_t)staticBuffer) & ~(pageSize - 1));
    char * endPage = (char *)(((size_t)staticBuffer + sizeof(staticBuffer) + pageSize - 1) & ~(pageSize - 1));
    if (!MemProtect(firstPage, endPage - firstPage, MEM_READ_WRITE_EXEC)) {Abort("MemProtect failed");}

    for (int i = 0; i < 3; ++i)
    {
        FOO_FUNC fooFunc;
        fooFunc.Copy(staticBuffer).Execute().AssertStatus();
        cerr << fooFunc.Name() << ": " << fooFunc.ErrorMessage() << endl;

        BAR_FUNC barFunc;
        barFunc.Copy(staticBuffer).Execute().AssertStatus();
        cerr << barFunc.Name() << ": " << barFunc.ErrorMessage() << endl;
    }

    cerr << "Dynamic code generation" << endl;
    void * dynamicBuffer;
    dynamicBuffer = MemAlloc(PI_FUNC::MAX_SIZE, MEM_READ_WRITE_EXEC);
    if (dynamicBuffer == 0) {Abort("MemAlloc failed");}

    {
        FOO_FUNC fooFunc;
        fooFunc.Copy(dynamicBuffer);
        if (!MemProtect(dynamicBuffer, PI_FUNC::MAX_SIZE, MEM_READ_EXEC)) {Abort("MemProtect failed");}
        for (int i = 0; i < 3; ++i)
        {
            fooFunc.Execute().AssertStatus();
            cerr << fooFunc.Name() << ": " << fooFunc.ErrorMessage() << endl;
        }
    }

    if (!MemProtect(dynamicBuffer, PI_FUNC::MAX_SIZE, MEM_READ_WRITE_EXEC)) {Abort("MemProtect failed");}

    {
        BAR_FUNC barFunc;
        barFunc.Copy(dynamicBuffer);
        if (!MemProtect(dynamicBuffer, PI_FUNC::MAX_SIZE, MEM_READ_EXEC)) {Abort("MemProtect failed");}
        for (int i = 0; i < 3; ++i)
        {
            barFunc.Execute().AssertStatus();
            cerr << barFunc.Name() << ": " << barFunc.ErrorMessage() << endl;
        }
    }

    return 0;
}