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// File: W32_Allocator.cxx
// Created: Feb 1998
// Author: PLOTNIKOV Eugeny & CHABROVSKY Dmitry
// Copyright: Matra Datavision 1998
#include <W32_Allocator.hxx>
#include <W95_Allocator.hxx>
#include <WNT_Allocator.hxx>
#include <windowsx.h>
#pragma comment( lib, "gdi32.lib" )
#pragma comment( lib, "user32.lib" )
////////////////////////////////////////////////////////////////////////////////
// I N I T I A L I Z A T I O N //
////////////////////////////////////////////////////////////////////////////////
#define DEF_BLOCK_SIZE ( 2 * s_dwPageSize )
static DWORD s_dwPageSize;
PW32_Allocator ( *W32_GetAllocator ) ( int, PW32_Allocator );
double W32_TextFactor;
static PW32_Allocator W95_GetAllocator ( int anID, PW32_Allocator head ) {
return new W95_Allocator ( anID, head );
} // end W95_GetAllocator
static PW32_Allocator WNT_GetAllocator ( int anID, PW32_Allocator head ) {
return new WNT_Allocator ( anID, head );
} // end WNT_GetAllocator
class _initAllocator {
public:
_initAllocator ();
};
_initAllocator :: _initAllocator () {
OSVERSIONINFO os;
SYSTEM_INFO si;
GetSystemInfo ( &si );
s_dwPageSize = si.dwPageSize;
os.dwOSVersionInfoSize = sizeof ( OSVERSIONINFO );
GetVersionEx ( &os );
if ( os.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS ) {
doWin95:
W32_GetAllocator = &W95_GetAllocator;
W32_TextFactor = 5.0;
} else {
GetEnvironmentVariable ( TEXT( "CSF_WNT_FORCE_WIN95" ), NULL, 0 );
if ( GetLastError () != ERROR_ENVVAR_NOT_FOUND ) goto doWin95;
W32_GetAllocator = &WNT_GetAllocator;
W32_TextFactor = 1.0;
} // end else
} // end constructor
static _initAllocator s_InitAllocator;
////////////////////////////////////////////////////////////////////////////////
// W 3 2 _ A L L O C A T O R S T U F F //
////////////////////////////////////////////////////////////////////////////////
W32_Allocator :: W32_Allocator ( int anID, PW32_Allocator head ) :
myID ( anID ), myFlags ( W32F_EMPTY ), myEnd ( NULL ),
myNext ( NULL ) {
LOGFONT lf;
HDC hdc = GetDC ( NULL );
GetObject ( hdc, sizeof ( LOGFONT ), &lf );
ReleaseDC ( NULL, hdc );
lf.lfOutPrecision |= OUT_TT_ONLY_PRECIS;
if ( head != NULL ) {
while ( head -> myNext != NULL ) head = head -> myNext;
head -> myNext = this;
} // end if
myStart = MakeBlock ( DEF_BLOCK_SIZE );
myTextFont = CreateFontIndirect ( &lf );
myTextSlant = 0.0;
myTextHScale =
myTextVScale = 1.0 / W32_TextFactor;
myScaleX = myScaleY = 1.0;
myAngle = 0.0;
myPivot.x = myMove.x =
myPivot.y = myMove.y = 0;
myFlags = ( W32F_EMPTY | W32F_POUTL | W32F_DFONT );
myPrimitive = zzNone;
myPointColor =
myMarkerPointColor = RGB( 255, 255, 255 );
} // end constructor
W32_Allocator :: ~W32_Allocator () {
KillBlocks ( myStart );
if ( myFlags & W32F_DFONT ) DeleteFont( myTextFont );
} // end destructor
PW32_Block W32_Allocator :: MakeBlock ( int aBlockSize ) {
PW32_Block retVal;
aBlockSize = ( s_dwPageSize / aBlockSize + 1 ) * s_dwPageSize;
retVal = ( PW32_Block )VirtualAlloc (
NULL, aBlockSize, MEM_RESERVE | MEM_COMMIT,
PAGE_READWRITE
);
if ( retVal == NULL ) RaiseException ( STATUS_NO_MEMORY, 0, 0, NULL );
if ( myEnd != NULL ) myEnd -> next = retVal;
myEnd = retVal;
retVal -> next = NULL;
retVal -> size = aBlockSize / sizeof ( int ) - sizeof ( W32_Block ) / sizeof ( int );
retVal -> free = 0;
return retVal;
} // end W32_Allocator :: MakeBlock
PW32_Block W32_Allocator :: KillBlock ( PW32_Block aVictim ) {
PW32_Block next = aVictim -> next;
ReleaseBlock ( aVictim );
VirtualFree ( ( LPVOID )aVictim, 0, MEM_RELEASE );
return next;
} // end W32_Allocator :: KillBlock
void W32_Allocator :: KillBlocks ( PW32_Block aBegin ) {
while ( ( aBegin = KillBlock ( aBegin ) ) != NULL );
} // end W32_Allocator :: KillBlocks
void W32_Allocator :: ClearBlocks ( void ) {
if ( myStart -> next != NULL ) KillBlocks ( myStart -> next );
ReleaseBlock ( myStart );
myStart -> next = NULL;
myStart -> free = 0;
myEnd = myStart;
myFlags &= ~W32F_DRAWN;
myFlags |= W32F_EMPTY;
} // end W32_Allocator :: ClearBlocks
void W32_Allocator :: ReleaseBlock ( PW32_Block pb ) {
for ( int i = 0; i < pb -> free; i += pb -> data[ i ] )
if ( pb -> data[ i + 1 ] != __W32_DATA ) {
W32_Note* pNote = ( W32_Note* )&( pb -> data[ i + 1 ] );
pNote -> ~W32_Note ();
} // end if
} // end W32_Allocator :: ReleaseBlock
BOOL W32_Allocator :: FreeSpace ( PW32_Block aBlock, int aQuerySize ) {
return ( aBlock -> size >= ( aBlock -> free + aQuerySize + 1 ) );
} // end W32_Allocator :: FreeSpace
PW32_Block W32_Allocator :: ReserveData ( unsigned int iSize ) {
if ( !FreeSpace ( myEnd, iSize ) ) return NULL;
return myEnd;
} // end W32_Allocator :: ReserveData
PW32_Block W32_Allocator :: ReserveFind ( unsigned int iSize ) {
PW32_Block aBlock = myStart;
for ( ; aBlock != NULL; aBlock = aBlock -> next )
if ( FreeSpace ( aBlock, iSize ) ) break;
return aBlock;
} // end W32_Allocator :: ReserveFind
void* W32_Allocator :: ReserveBlock ( PW32_Block aBlock, int aQuerySize, BOOL fData ) {
void* retVal;
++aQuerySize;
retVal = fData ? &( aBlock -> data[ aBlock -> free + 2 ] ) :
&( aBlock -> data[ aBlock -> free + 1 ] );
aBlock -> data[ aBlock -> free ] = aQuerySize;
aBlock -> data[ aBlock -> free + 1 ] = __W32_DATA;
aBlock -> free += aQuerySize;
return retVal;
} // end W32_Allocator :: ReserveBlock
void* W32_Allocator :: NewClass ( unsigned int nBytes ) {
PW32_Block aBlock = myEnd;
nBytes = ( ( nBytes + 3 ) / sizeof ( int ) );
if ( !FreeSpace ( aBlock, nBytes ) ) aBlock = MakeBlock ( nBytes );
myFlags &= ~W32F_EMPTY;
return ReserveBlock ( aBlock, nBytes );
} // end W32_Allocator :: NewClass
void* W32_Allocator :: NewData ( unsigned int nBytes, BOOL fFind ) {
PW32_Block aBlock;
nBytes = ( ( nBytes + 3 ) / sizeof ( int ) ) + 1;
aBlock = fFind ? ReserveFind ( nBytes ) : ReserveData ( nBytes );
if ( aBlock == NULL ) aBlock = MakeBlock ( nBytes );
return ReserveBlock ( myEnd, nBytes, TRUE );
} // end W32_Allocator :: NewData
void* W32_Note :: operator new ( size_t cSize, PW32_Allocator anAllocator ) {
W32_Note* note = ( W32_Note* )anAllocator -> NewClass ( cSize );
note -> myAllocator = anAllocator;
return ( void* )note;
} // end W32_Note :: operator new
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