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[NTVDM]

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Implement INT 21h function AH = 67h (Set Handle Count).


svn path=/trunk/; revision=63288
This commit is contained in:
Aleksandar Andrejevic 2014-05-14 03:29:58 +00:00
parent a2e7e58fcc
commit 3284022bfc
1 changed files with 94 additions and 0 deletions
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94
reactos/subsystems/ntvdm/dos/dos32krnl/dos.c
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@ -584,6 +584,87 @@ static VOID DosCopyHandleTable(LPBYTE DestinationTable)
}
}
static BOOLEAN DosResizeHandleTable(WORD NewSize)
{
PDOS_PSP PspBlock;
LPBYTE HandleTable;
WORD Segment;
/* Get the PSP block */
PspBlock = SEGMENT_TO_PSP(CurrentPsp);
if (NewSize == PspBlock->HandleTableSize)
{
/* No change */
return TRUE;
}
if (PspBlock->HandleTableSize > 20)
{
/* Get the segment of the current table */
Segment = (LOWORD(PspBlock->HandleTablePtr) >> 4) + HIWORD(PspBlock->HandleTablePtr);
if (NewSize <= 20)
{
/* Get the current handle table */
HandleTable = FAR_POINTER(PspBlock->HandleTablePtr);
/* Copy it to the PSP */
RtlCopyMemory(PspBlock->HandleTable, HandleTable, NewSize);
/* Free the memory */
DosFreeMemory(Segment);
/* Update the handle table pointer and size */
PspBlock->HandleTableSize = NewSize;
PspBlock->HandleTablePtr = MAKELONG(0x18, CurrentPsp);
}
else
{
/* Resize the memory */
if (!DosResizeMemory(Segment, NewSize, NULL))
{
/* Unable to resize, try allocating it somewhere else */
Segment = DosAllocateMemory(NewSize, NULL);
if (Segment == 0) return FALSE;
/* Get the new handle table */
HandleTable = SEG_OFF_TO_PTR(Segment, 0);
/* Copy the handles to the new table */
RtlCopyMemory(HandleTable,
FAR_POINTER(PspBlock->HandleTablePtr),
PspBlock->HandleTableSize);
/* Update the handle table pointer */
PspBlock->HandleTablePtr = MAKELONG(0, Segment);
}
/* Update the handle table size */
PspBlock->HandleTableSize = NewSize;
}
}
else if (NewSize > 20)
{
Segment = DosAllocateMemory(NewSize, NULL);
if (Segment == 0) return FALSE;
/* Get the new handle table */
HandleTable = SEG_OFF_TO_PTR(Segment, 0);
/* Copy the handles from the PSP to the new table */
RtlCopyMemory(HandleTable,
FAR_POINTER(PspBlock->HandleTablePtr),
PspBlock->HandleTableSize);
/* Update the handle table pointer and size */
PspBlock->HandleTableSize = NewSize;
PspBlock->HandleTablePtr = MAKELONG(0, Segment);
}
return TRUE;
}
static BOOLEAN DosCloseHandle(WORD DosHandle)
{
BYTE SftIndex;
@ -2433,6 +2514,19 @@ VOID WINAPI DosInt21h(LPWORD Stack)
break;
}
/* Set Handle Count */
case 0x67:
{
if (!DosResizeHandleTable(getBX()))
{
Stack[STACK_FLAGS] |= EMULATOR_FLAG_CF;
setAX(DosLastError);
}
else Stack[STACK_FLAGS] &= ~EMULATOR_FLAG_CF;
break;
}
/* Unsupported */
default:
{