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Microsoft OS/2 SDK 2.0 05-30-1990

/****************************************************************************\
*
* Presentation Manager Paint - PMPaint
* File: ALLOCMEM.C - Contains 32-bit substitutes for the PMWIN memory
*                    management routines.
* 09-02-89 Created.
*
\****************************************************************************/

#define INCL_DOSMEMMGR
#define  INCL_WINHEAP
#include <os2.h>
#include "allocmem.h"

HHEAP WinCreateHeap(PBYTE pbHeapBase, ULONG cbHeap, ULONG cbGrow,
        ULONG chMinDed, ULONG cbMaxDed, ULONG fOptions)
{
    HHEAP hheap = (HHEAP)pbHeapBase;

    if (cbHeap == 0)
        cbHeap = 65535;

    if (pbHeapBase == NULL) {

        // If no heap memory is specified, allocate a 64K block.

        if (DosAllocMem((PPVOID)&hheap, cbHeap, MEMFLAGS))
            return(FALSE);
    }

    // Initialize the heap.

    if (DosSubSet((PVOID)hheap, 1, cbHeap))
        return(FALSE);

    return(hheap);

    /* Unreferenced formal parameters referenced here to prevent compiler
        warning */
    cbGrow;
    chMinDed;
    cbMaxDed;
    fOptions;

}


HHEAP WinDestroyHeap(HHEAP hHeap)
{
    // WinCreateHeap should toss something at the head of the heap
    // so WinDestroyHeap can know whether to DosFreeMem it or not.

    return(hHeap);
}


ULONG WinAvailMem(HHEAP hHeap, BOOL fCompact, ULONG cbMinFree)
{
    return(0);

    /* Unreferenced formal parameters referenced here to prevent compiler
        warning */
    hHeap;
    fCompact;
    cbMinFree;

}


PBYTE WinAllocMem(HHEAP hHeap, ULONG cb)
{
    PBYTE pbT;

    if (DosSubAlloc((PVOID)hHeap, (PPVOID)&pbT, cb))
        return(FALSE);

    return(pbT);
}


PBYTE WinReallocMem(HHEAP hHeap, PBYTE pMem, ULONG cbOld, ULONG cbNew)
{
    return(FALSE);

    /* Unreferenced formal parameters referenced here to prevent compiler
        warning */
    hHeap;
    pMem;
    cbOld;
    cbNew;

}


PBYTE WinFreeMem(HHEAP hHeap, PBYTE pMem, ULONG cbMem)
{
    if (DosSubFree((PVOID)hHeap, (PVOID)pMem, cbMem))
        return(FALSE);

    return(pMem);
}


PVOID WinLockHeap(HHEAP hHeap)
{
    return((PVOID)hHeap);
}

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