static GUI_HMEM FindFreeHandle(void) {
int i;
for (i=1; i< GUI_MAXBLOCKS; i++) {
if (aBlock[i].Size ==0)
return i;
}
GUI_DEBUG_ERROROUT1("Insufficient memory handles configured (GUI_MAXBLOCKS == %d (See GUIConf.h))", GUI_MAXBLOCKS);
return GUI_HMEM_NULL;
}
/*********************************************************************
*
* _Alloc
*/
static GUI_HMEM _Alloc(GUI_ALLOC_DATATYPE size) {
GUI_HMEM hMemNew, hMemIns;
_CheckInit();
size = _Size2LegalSize(size);
/* Check if memory is available at all ...*/
if (size > _GetNumFreeBytes()) {
GUI_DEBUG_WARN1("GUI_ALLOC_Alloc: Insufficient memory configured (Trying to alloc % bytes)", size);
return 0;
}
/* Locate free handle */
if ((hMemNew = _FindFreeHandle()) == 0) {
return 0;
}
/* Locate or Create hole of sufficient size */
hMemIns = _FindHole(size);
#if GUI_ALLOC_AUTDEFRAG
if (hMemIns == -1) {
if (_LockCnt == 0) {
hMemIns = _CreateHole(size);
}
}
#endif
/* Occupy hole */
if (hMemIns==-1) {
GUI_DEBUG_ERROROUT1("GUI_ALLOC_Alloc: Could not allocate %d bytes",size);
return 0;
}
{
GUI_ALLOC_DATATYPE Off = aBlock[hMemIns].Off + aBlock[hMemIns].Size;
int Next = aBlock[hMemIns].Next;
aBlock[hMemNew].Size = size;
aBlock[hMemNew].Off = Off;
if ((aBlock[hMemNew].Next = Next) >0) {
aBlock[Next].Prev = hMemNew;
}
aBlock[hMemNew].Prev = hMemIns;
aBlock[hMemIns].Next = hMemNew;
}
/* Keep track of number of blocks and av. memory */
GUI_ALLOC.NumUsedBlocks++;
GUI_ALLOC.NumFreeBlocks--;
if (GUI_ALLOC.NumFreeBlocksMin > GUI_ALLOC.NumFreeBlocks) {
GUI_ALLOC.NumFreeBlocksMin = GUI_ALLOC.NumFreeBlocks;
}
GUI_ALLOC.NumUsedBytes += size;
GUI_ALLOC.NumFreeBytes -= size;
if (GUI_ALLOC.NumFreeBytesMin > GUI_ALLOC.NumFreeBytes) {
GUI_ALLOC.NumFreeBytesMin = GUI_ALLOC.NumFreeBytes;
}
return hMemNew;
}
static GUI_HMEM _Alloc(int size) {
GUI_HMEM hMemNew, hMemIns;
CheckInit();
size = Size2LegalSize(size);
/* Check if memory is available at all ...*/
if (size > GUI_ALLOC.NumFreeBytes) {
GUI_DEBUG_WARN1("GUI_ALLOC_Alloc: Insufficient memory configured (Trying to alloc % bytes)", size);
return 0;
}
/* Locate free handle */
if ((hMemNew = FindFreeHandle()) == 0)
return 0;
/* Locate or Create hole of sufficient size */
hMemIns = FindHole(size);
#if GUI_ALLOC_AUTDEFRAG
if (hMemIns == -1) {
hMemIns = CreateHole(size);
}
#endif
/* Occupy hole */
if (hMemIns==-1) {
GUI_DEBUG_ERROROUT1("GUI_ALLOC_Alloc: Could not allocate %d bytes",size);
return 0;
}
{
int Off = aBlock[hMemIns].Off+aBlock[hMemIns].Size;
int Next = aBlock[hMemIns].Next;
aBlock[hMemNew].Size = size;
aBlock[hMemNew].Off = Off;
if ((aBlock[hMemNew].Next = Next) >0) {
aBlock[Next].Prev = hMemNew;
}
aBlock[hMemNew].Prev = hMemIns;
aBlock[hMemIns].Next = hMemNew;
}
/* Keep track of number of blocks and av. memory */
GUI_ALLOC.NumUsedBlocks++;
GUI_ALLOC.NumFreeBlocks--;
if (GUI_ALLOC.NumFreeBlocksMin > GUI_ALLOC.NumFreeBlocks) {
GUI_ALLOC.NumFreeBlocksMin = GUI_ALLOC.NumFreeBlocks;
}
GUI_ALLOC.NumUsedBytes += size;
GUI_ALLOC.NumFreeBytes -= size;
if (GUI_ALLOC.NumFreeBytesMin > GUI_ALLOC.NumFreeBytes) {
GUI_ALLOC.NumFreeBytesMin = GUI_ALLOC.NumFreeBytes;
}
/* In order to be on the safe side, zeroinit ! */
memset(HMEM2PTR(hMemNew), 0, size);
return hMemNew;
}
WM_HWIN WM_SelectWindow(WM_HWIN hWin) {
WM_HWIN hWinPrev;
WM_LOCK();
hWinPrev = GUI_Context.hAWin;
if (hWin == 0) {
hWin = WM__FirstWin;
}
if (!(WM_H2P(hWin)->Status & WM_SF_INUSE)) {
GUI_DEBUG_ERROROUT1("Selecting invalid window", hWin);
hWin=0;
}
/* Select new window */
GUI_Context.hAWin = hWin;
WM__SetMaxClipRect(WM_H2P(hWin));
WM_UNLOCK();
return hWinPrev;
}