1185 lines
31 KiB
C++
1185 lines
31 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1994.
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//
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// File: smalloc.cxx
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//
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// Contents: Shared memory heap implementation
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//
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// Classes:
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//
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// Functions:
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//
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// History: 29-Mar-94 PhilipLa Created
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// 05-Feb-95 KentCe Use Win95 Shared Heap.
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// 10-May-95 KentCe Defer Heap Destruction to the last
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// process detach.
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//
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//----------------------------------------------------------------------------
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#include <dfhead.cxx>
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#pragma hdrstop
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#include <smalloc.hxx>
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#ifdef NEWPROPS
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#define FULLIMPL
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#endif
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//
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// Take advantage of unique Win95 support of a shared heap.
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//
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#if defined(_CHICAGO_)
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#define HEAP_SHARED 0x04000000 // Secret feature of Win95 only.
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//
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// Locate the following in a shared data segment.
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//
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#pragma data_seg(".sdata")
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HANDLE gs_hSharedHeap = NULL; // hSharedHeap Handle for Win95.
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DFLUID gs_dfluid = LUID_BASE; // shared docfile global LUID
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#pragma data_seg()
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#define PRINTSTATS
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#else // defined(_CHICAGO_)
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#define DLL
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#define DEB_STATS 0x00010000
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#define DEB_PRINT 0x00020000
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#ifdef DLL
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#define PERCENT(a,b,c) (int)((((double)a + (double)b) / (double)c) * 100.0)
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#define PRINTSTATS \
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memDebugOut((DEB_STATS, \
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"Total size: %lu, Space: Free: %lu, Alloced: %lu"\
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" Blocks: Free: %lu, Alloced: %lu"\
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" Efficiency: %.2f%%\n",\
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_cbSize,\
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GetHeader()->_ulFreeBytes,\
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GetHeader()->_ulAllocedBytes,\
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GetHeader()->_ulFreeBlocks,\
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GetHeader()->GetAllocedBlocks(),\
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PERCENT(GetHeader()->_ulFreeBytes,\
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GetHeader()->_ulAllocedBytes, _cbSize)));
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#else
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#define PRINTSTATS \
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printf( \
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"Total size: %lu, Free space: %lu, Alloced space: %lu"\
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" Efficiency: %.2f%%\n",\
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_cbSize,\
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GetHeader()->_ulFreeBytes,\
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GetHeader()->_ulAllocedBytes,\
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((double)(GetHeader()->_ulFreeBytes +\
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GetHeader()->_ulAllocedBytes) / \
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(double)_cbSize) * (double)100);
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#endif
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#if DBG == 1
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inline BOOL IsAligned(void *pv)
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{
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return !((ULONG)pv & 7);
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}
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#else
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#define IsAligned(x) TRUE
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#endif
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#define SHAREDMEMBASE NULL
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#endif // !defined(_CHICAGO_)
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//+---------------------------------------------------------------------------
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//
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// Member: CSmAllocator::Init, public
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//
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// Synopsis: Initialize heap for use
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//
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// Arguments: [pszName] -- Name of shared memory heap to use
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//
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// Returns: Appropriate status code
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//
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// History: 29-Mar-94 PhilipLa Created
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// 05-Feb-95 KentCe Use Win95 Shared Heap.
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//
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// Remarks: Review the class destructor if you change this code.
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//
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//----------------------------------------------------------------------------
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#if !defined(MULTIHEAP)
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SCODE CSmAllocator::Init(LPWSTR pszName)
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#else
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SCODE CSmAllocator::Init(ULONG ulHeapName, BOOL fUnmarshal)
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#endif
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{
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SCODE sc = S_OK;
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#if !defined(MULTIHEAP)
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// Initialize the mutex
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sc = _dmtx.Init(TEXT("DocfileAllocatorMutex"));
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if (FAILED(sc))
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{
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return sc;
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}
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sc = _dmtx.Take(DFM_TIMEOUT);
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if (FAILED(sc))
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{
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return sc;
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}
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#endif
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#if defined(_CHICAGO_)
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//
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// Create a new shared heap if this is the first time thru.
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//
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if (gs_hSharedHeap == NULL)
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{
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gs_hSharedHeap = HeapCreate(HEAP_SHARED, 0, 0);
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}
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//
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// We keep a copy of the shared heap as a flag so the destructor logic
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// does the right thing.
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//
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//
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m_hSharedHeap = gs_hSharedHeap;
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#else
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CSharedMemoryBlock *psmb = NULL;
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#ifdef MULTIHEAP
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_cbSize = 0;
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if (!fUnmarshal && this == &g_SmAllocator) // only for main thread
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{
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if (g_ulHeapName != 0) // the global shared memory block is active
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{
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_psmb = &g_smb; // needed for GetHeader
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_pbBase = (BYTE *)(_psmb->GetBase()); // needed for GetHeader
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if (_pbBase != NULL && GetHeader()->GetAllocedBlocks() == 0)
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{ // its' empty reuse it
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psmb = _psmb;
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_ulHeapName = g_ulHeapName;
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memDebugOut ((DEB_ITRACE, "Out CSmAllocator::Init "
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" reuse %x\n", g_ulHeapName));
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return sc;
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}
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}
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else
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{
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psmb = _psmb = &g_smb; // initialize g_smb
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}
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}
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if (psmb == NULL)
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{
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psmb = _psmb = new CSharedMemoryBlock ();
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if (psmb == NULL)
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return STG_E_INSUFFICIENTMEMORY;
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}
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WCHAR pszName[DOCFILE_SM_NAMELEN];
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wsprintf(pszName, L"DfSharedHeap%X", ulHeapName);
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#else
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psmb = &_smb;
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#endif
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// the SMB needs a few bytes for its own header. If we request
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// a page sized allocation, those few header bytes will cause an
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// extra page to be allocated, so to prevent that we subtract off
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// the header space from our requests.
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sc = psmb->Init(pszName,
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DOCFILE_SM_SIZE - psmb->GetHdrSize(), // reserve size
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INITIALHEAPSIZE - psmb->GetHdrSize(), // commit size
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SHAREDMEMBASE, // base address
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NULL, // security descriptor
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TRUE); // create if doesn't exist
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if (SUCCEEDED(sc))
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{
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_cbSize = psmb->GetSize();
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_pbBase = (BYTE *)(psmb->GetBase());
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#ifdef MULTIHEAP
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_ulHeapName = ulHeapName;
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#endif
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if (psmb->Created())
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{
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CBlockHeader *pbh = (CBlockHeader *)
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(_pbBase + sizeof(CHeapHeader));
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memAssert(IsAligned(pbh));
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pbh->SetFree();
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pbh->SetSize(_cbSize - sizeof(CHeapHeader));
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pbh->SetNext(0);
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memAssert((BYTE *)pbh + pbh->GetSize() == _pbBase + _cbSize);
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GetHeader()->SetFirstFree(GetOffset(pbh));
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GetHeader()->SetCompacted();
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GetHeader()->ResetAllocedBlocks();
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GetHeader()->ResetLuid();
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#if DBG == 1
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GetHeader()->_ulAllocedBytes = 0;
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GetHeader()->_ulFreeBytes =
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pbh->GetSize() - sizeof(CBlockPreHeader);
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GetHeader()->_ulFreeBlocks = 1;
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#endif
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}
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#ifdef MULTIHEAP
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if (psmb == &g_smb)
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g_ulHeapName = ulHeapName; // store global heap name
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#endif
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PRINTSTATS;
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}
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#endif
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#if defined(MULTIHEAP)
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memDebugOut ((DEB_ITRACE, "Out CSmAllocator::Init sc=%x %x\n",
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sc, ulHeapName));
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#else
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_dmtx.Release();
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memDebugOut ((DEB_ITRACE, "Out CSmAllocator::Init sc=%x\n",
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sc));
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#endif
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return sc;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CSmAllocator::QueryInterface, public
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//
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// Synopsis: Standard QI
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//
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// Arguments: [iid] - Interface ID
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// [ppvObj] - Object return
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//
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// Returns: Appropriate status code
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//
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// History: 29-Mar-94 PhilipLa Created
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP CSmAllocator::QueryInterface(REFIID iid, void **ppvObj)
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{
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SCODE sc;
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memDebugOut((DEB_ITRACE, "In CSmAllocator::QueryInterface:%p()\n", this));
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if (IsEqualIID(iid, IID_IMalloc) || IsEqualIID(iid, IID_IUnknown))
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{
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*ppvObj = (IMalloc *) this;
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CSmAllocator::AddRef();
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}
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else
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sc = E_NOINTERFACE;
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memDebugOut((DEB_ITRACE, "Out CSmAllocator::QueryInterface\n"));
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return ResultFromScode(sc);
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CSmAllocator::AddRef, public
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//
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// Synopsis: Add reference
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//
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// History: 29-Mar-94 PhilipLa Created
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP_(ULONG) CSmAllocator::AddRef(void)
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{
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#ifdef MULTIHEAP
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return ++_cRefs;
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#else
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return 1;
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#endif
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CSmAllocator::Release, public
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//
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// Synopsis: Release
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//
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// History: 29-Mar-94 PhilipLa Created
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP_(ULONG) CSmAllocator::Release(void)
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{
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#ifdef MULTIHEAP
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ULONG cRefs = --_cRefs;
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if (cRefs <= 0)
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delete this;
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return cRefs;
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#else
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return 0;
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#endif
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}
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#if !defined(_CHICAGO_)
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//+---------------------------------------------------------------------------
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//
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// Member: CSmAllocator::FindBlock, private
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//
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// Synopsis: Find an appropriately sized block in the heap.
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//
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// Arguments: [cb] -- Size of block required
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//
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// Returns: Pointer to block, NULL on failure
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//
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// History: 29-Mar-94 PhilipLa Created
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//
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//----------------------------------------------------------------------------
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CBlockHeader * CSmAllocator::FindBlock(ULONG cb, CBlockHeader **ppbhPrev)
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{
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CBlockHeader *pbhCurrent = GetAddress(GetHeader()->GetFirstFree());
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*ppbhPrev = NULL;
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while (pbhCurrent != NULL)
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{
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memAssert(IsAligned(pbhCurrent));
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if ((pbhCurrent->GetSize() >= cb) && (pbhCurrent->IsFree()))
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{
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memAssert(pbhCurrent->GetSize() < _cbSize); //MULTIHEAP
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memAssert((BYTE *)pbhCurrent >= _pbBase &&
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(BYTE *)pbhCurrent < _pbBase + _cbSize); // MULTIHEAP
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break;
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}
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else
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{
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memAssert (pbhCurrent->GetNext() <= _cbSize); // MULITHEAP
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*ppbhPrev = pbhCurrent;
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pbhCurrent = GetAddress(pbhCurrent->GetNext());
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}
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}
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return pbhCurrent;
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}
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//+---------------------------------------------------------------------------
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//
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// Member: CSmAllocator::Reset, private
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//
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// Synopsis: Reset the heap to its original empty state.
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//
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// Returns: Appropriate status code
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//
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// History: 04-Apr-94 PhilipLa Created
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//
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// Notes: There is only one caller of this function. Hence it is
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// declared inline.
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//
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//----------------------------------------------------------------------------
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inline SCODE CSmAllocator::Reset(void)
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{
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memDebugOut((DEB_ITRACE, "In CSmAllocator::Reset:%p()\n", this));
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#ifdef RESETOK
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#ifdef MULTIHEAP
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CSharedMemoryBlock *psmb = _psmb;
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#else
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CSharedMemoryBlock *psmb = &_smb;
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#endif
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psmb->Reset();
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_cbSize = psmb->GetSize();
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_pbBase = (BYTE *)(psmb->GetBase());
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CBlockHeader *pbh = (CBlockHeader *)
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(_pbBase + sizeof(CHeapHeader));
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pbh->SetFree();
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pbh->SetSize(_cbSize - sizeof(CHeapHeader));
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pbh->SetNext(0);
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memAssert((BYTE *)pbh + pbh->GetSize() == _pbBase + _cbSize);
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GetHeader()->SetFirstFree(GetOffset(pbh));
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GetHeader()->SetCompacted();
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GetHeader()->ResetAllocedBlocks();
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#if DBG == 1
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GetHeader()->_ulAllocedBytes = 0;
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GetHeader()->_ulFreeBytes =
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pbh->GetSize() - sizeof(CBlockPreHeader);
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GetHeader()->_ulFreeBlocks = 1;
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#endif
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memDebugOut((DEB_ITRACE, "Out CSmAllocator::Reset\n"));
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#else
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HeapMinimize();
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#endif
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return S_OK;
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}
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#endif
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//+---------------------------------------------------------------------------
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//
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// Member: CSmAllocator::Alloc, public
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//
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// Synopsis: Allocate memory
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//
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// Arguments: [cb] -- Number of bytes to allocate
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//
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// Returns: Pointer to block, NULL if failure
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//
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// History: 29-Mar-94 PhilipLa Created
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//
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//----------------------------------------------------------------------------
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STDMETHODIMP_(void *) CSmAllocator::Alloc (
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ULONG cb )
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{
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void *pv = NULL;
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#if !defined(_CHICAGO_)
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CBlockHeader *pbh = NULL;
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CBlockHeader *pbhPrev = NULL;
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SCODE sc;
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#endif
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memDebugOut((DEB_ITRACE, "In CSmAllocator::Alloc:%p(%lu)\n", this, cb));
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#if defined(_CHICAGO_)
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pv = HeapAlloc(m_hSharedHeap, 0, cb);
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#else // !defined(_CHICAGO_)
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#if !defined(MULTIHEAP)
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CLockDfMutex lckdmtx(_dmtx);
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#endif
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Sync();
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//The block must be at least large enough to hold the standard
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// header (size and free bit) and a pointer to the next block.
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if (cb < sizeof(CBlockHeader) - sizeof(CBlockPreHeader))
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{
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cb = sizeof(CBlockHeader) - sizeof(CBlockPreHeader);
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}
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cb = cb + sizeof(CBlockPreHeader);
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//Make cb 8 byte aligned.
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if (cb & 7)
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{
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cb += (8 - (cb & 7));
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}
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memAssert((cb >= CBLOCKMIN) && "Undersized block requested.");
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pbh = FindBlock(cb, &pbhPrev);
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if (pbh == NULL)
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{
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if (!(GetHeader()->IsCompacted()))
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{
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//Do a heap merge and try to allocate again.
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CSmAllocator::HeapMinimize();
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pbh = FindBlock(cb, &pbhPrev);
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}
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if (pbh == NULL)
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{
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#ifdef MULTIHEAP
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CSharedMemoryBlock *psmb = _psmb;
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#else
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CSharedMemoryBlock *psmb = &_smb;
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#endif
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#if DBG == 1
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ULONG ulOldSize = psmb->GetSize();
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#endif
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sc = psmb->Commit(_cbSize + max(cb, MINHEAPGROWTH));
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if (SUCCEEDED(sc))
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{
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//Attach newly committed space to free list.
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CBlockHeader *pbhNew = (CBlockHeader *)
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(_pbBase + _cbSize);
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_cbSize = psmb->GetSize();
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memAssert((pbhPrev == NULL) || (pbhPrev->GetNext() == 0));
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memAssert(_cbSize > ulOldSize);
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if (pbhPrev != NULL)
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{
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pbhPrev->SetNext(GetOffset(pbhNew));
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}
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else
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{
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GetHeader()->SetFirstFree(GetOffset(pbhNew));
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}
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pbhNew->SetNext(0);
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pbhNew->SetSize(max(cb, MINHEAPGROWTH));
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pbhNew->SetFree();
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memAssert((BYTE *)pbhNew + pbhNew->GetSize() ==
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_pbBase + _cbSize);
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#if DBG == 1
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GetHeader()->_ulFreeBytes +=
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pbhNew->GetSize() - sizeof(CBlockPreHeader);
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GetHeader()->_ulFreeBlocks += 1;
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#endif
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pbh = pbhNew;
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}
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}
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}
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if (pbh != NULL)
|
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{
|
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//Allocate the found block.
|
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if ((pbh->GetSize() > cb) &&
|
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(pbh->GetSize() - cb > CBLOCKMIN))
|
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{
|
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//Split an existing block. No free list update required.
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|
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CBlockHeader *pbhNew =
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(CBlockHeader *)((BYTE *)pbh + (pbh->GetSize() - cb));
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pbhNew->SetSize(cb);
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pbhNew->ResetFree();
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pbhNew->SetNext(0);
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pbh->SetSize(pbh->GetSize() - cb);
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#if DBG == 1
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GetHeader()->_ulAllocedBytes += (cb - sizeof(CBlockPreHeader));
|
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//The number of available free bytes decreases by the number
|
|
// of bytes allocated
|
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GetHeader()->_ulFreeBytes -= cb;
|
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#endif
|
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memAssert(IsAligned(pbhNew));
|
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memAssert(IsAligned(pbh));
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|
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pbh = pbhNew;
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}
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else
|
|
{
|
|
//Use an entire block. Update free list appropriately.
|
|
memAssert(IsAligned(pbh));
|
|
pbh->ResetFree();
|
|
if (pbhPrev != NULL)
|
|
{
|
|
pbhPrev->SetNext(pbh->GetNext());;
|
|
}
|
|
else
|
|
{
|
|
GetHeader()->SetFirstFree(pbh->GetNext());
|
|
}
|
|
#if DBG == 1
|
|
GetHeader()->_ulAllocedBytes += (cb - sizeof(CBlockPreHeader));
|
|
GetHeader()->_ulFreeBytes -= (cb - sizeof(CBlockPreHeader));
|
|
GetHeader()->_ulFreeBlocks--;
|
|
#endif
|
|
pbh->SetNext(0);
|
|
}
|
|
}
|
|
|
|
if (pbh != NULL)
|
|
{
|
|
pv = (BYTE *)pbh + sizeof(CBlockPreHeader);
|
|
GetHeader()->IncrementAllocedBlocks();
|
|
}
|
|
#endif // !defined(_CHICAGO_)
|
|
|
|
memDebugOut((DEB_ITRACE, "Out CSmAllocator::Alloc=> %p\n", pv));
|
|
|
|
#if !defined(_CHICAGO_)
|
|
memAssert(IsAligned(pv));
|
|
#endif // !defined(_CHICAGO_)
|
|
|
|
PRINTSTATS;
|
|
|
|
#if DBG == 1
|
|
if (pv == NULL)
|
|
{
|
|
#if defined(_CHICAGO_)
|
|
memDebugOut((DEB_ERROR,
|
|
"Failed allocation of %lu bytes.\n",
|
|
cb));
|
|
#else // !defined(_CHICAGO_)
|
|
memDebugOut((DEB_ERROR,
|
|
"Failed allocation of %lu bytes. Heap size is %lu\n",
|
|
cb,
|
|
_cbSize));
|
|
#endif // !defined(_CHICAGO_)
|
|
}
|
|
#endif
|
|
|
|
return pv;
|
|
}
|
|
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CSmAllocator::Realloc, public
|
|
//
|
|
// Synopsis: Resize the block given
|
|
//
|
|
// Arguments: [pv] -- Pointer to block to realloc
|
|
// [cb] -- New size for block
|
|
//
|
|
// Returns: Pointer to new block, NULL if failure
|
|
//
|
|
// History: 29-Mar-94 PhilipLa Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
STDMETHODIMP_(void *) CSmAllocator::Realloc(
|
|
void *pv,
|
|
ULONG cb )
|
|
{
|
|
void *pvNew = NULL;
|
|
#ifdef FULLIMPL
|
|
memDebugOut((DEB_ITRACE, "In CSmAllocator::Realloc:%p()\n", this));
|
|
|
|
#if defined(_CHICAGO_)
|
|
|
|
pvNew = HeapReAlloc(m_hSharedHeap, 0, pv, cb);
|
|
|
|
#else
|
|
#if !defined(MULTIHEAP)
|
|
CLockDfMutex lckdmtx(_dmtx);
|
|
#endif
|
|
|
|
if ((pv != NULL) && (cb == 0))
|
|
{
|
|
CSmAllocator::Free(pv);
|
|
return NULL;
|
|
}
|
|
|
|
pvNew = CSmAllocator::Alloc(cb);
|
|
if (pvNew != NULL && pv != NULL)
|
|
{
|
|
//Copy contents
|
|
memcpy(pvNew, pv, min(cb, CSmAllocator::GetSize(pv)));
|
|
CSmAllocator::Free(pv);
|
|
}
|
|
#endif
|
|
|
|
memDebugOut((DEB_ITRACE, "Out CSmAllocator::Realloc\n"));
|
|
#endif
|
|
PRINTSTATS;
|
|
|
|
return pvNew;
|
|
}
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CSmAllocator::DoFree, private
|
|
//
|
|
// Synopsis: Free a memory block
|
|
//
|
|
// Arguments: [pv] -- Pointer to block to free
|
|
//
|
|
// Returns: void
|
|
//
|
|
// History: 26-Jul-95 SusiA Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
inline void CSmAllocator::DoFree(void *pv)
|
|
{
|
|
memDebugOut((DEB_ITRACE, "In CSmAllocator::DoFree:%p(%p)\n", this, pv));
|
|
|
|
#if defined(_CHICAGO_)
|
|
|
|
if (pv != NULL)
|
|
{
|
|
HeapFree(m_hSharedHeap, 0, pv);
|
|
}
|
|
|
|
#else
|
|
|
|
Sync();
|
|
|
|
if (pv != NULL)
|
|
{
|
|
CBlockHeader *pbh = (CBlockHeader *)
|
|
((BYTE *)pv - sizeof(CBlockPreHeader));
|
|
#ifdef MULTIHEAP
|
|
ULONG ulSize = pbh->GetSize(); // temporary to hold size for debug
|
|
#endif
|
|
|
|
memAssert(IsAligned(pbh));
|
|
memAssert((BYTE*)pbh >= _pbBase &&
|
|
(BYTE*)pbh < _pbBase + _cbSize); // MULTIHEAP
|
|
pbh->SetFree();
|
|
pbh->SetNext(GetHeader()->GetFirstFree());
|
|
|
|
GetHeader()->SetFirstFree(GetOffset(pbh));
|
|
GetHeader()->ResetCompacted();
|
|
if (GetHeader()->DecrementAllocedBlocks() == 0)
|
|
{
|
|
#ifdef MULTIHEAP
|
|
Uninit();
|
|
#else
|
|
|
|
Reset();
|
|
#endif
|
|
}
|
|
|
|
#if DBG == 1
|
|
else
|
|
{
|
|
GetHeader()->_ulAllocedBytes -=
|
|
(pbh->GetSize() - sizeof(CBlockPreHeader));
|
|
GetHeader()->_ulFreeBytes +=
|
|
(pbh->GetSize() - sizeof(CBlockPreHeader));
|
|
GetHeader()->_ulFreeBlocks++;
|
|
}
|
|
#endif
|
|
#ifdef MULTIHEAP
|
|
memDebugOut((DEB_ITRACE, "Out CSmAllocator::DoFree. Freed %lu\n",
|
|
ulSize)); // don't access shared memory
|
|
#else
|
|
memDebugOut((DEB_ITRACE, "Out CSmAllocator::DoFree. Freed %lu\n",
|
|
pbh->GetSize()));
|
|
#endif
|
|
}
|
|
#endif
|
|
#if !defined(MULTIHEAP)
|
|
// the shared heap may have been unmapped, mustn't read it now
|
|
PRINTSTATS;
|
|
#endif
|
|
}
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CSmAllocator::Free, public
|
|
//
|
|
// Synopsis: Free a memory block
|
|
//
|
|
// Arguments: [pv] -- Pointer to block to free
|
|
//
|
|
// Returns: void
|
|
//
|
|
// History: 29-Mar-94 PhilipLa Created
|
|
// 26-Jul-95 SusiA Moved bulk of work to DoFree to
|
|
// share code between Free and
|
|
// FreeNoMutex
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
STDMETHODIMP_(void) CSmAllocator::Free(void *pv)
|
|
{
|
|
memDebugOut((DEB_ITRACE, "In CSmAllocator::Free:%p(%p)\n", this, pv));
|
|
|
|
#if !defined(_CHICAGO_)
|
|
#if !defined(MULTIHEAP)
|
|
CLockDfMutex lckdmtx(_dmtx);
|
|
#endif
|
|
#endif
|
|
DoFree(pv);
|
|
|
|
}
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CSmAllocator::FreeNoMutex, public
|
|
//
|
|
// Synopsis: Free a memory block without first aquiring the mutex.
|
|
// This function is equivalent to Free above, except that is does
|
|
// not attempt to first aquire the mutex. It should be used OLNY
|
|
// when the calling function guarantees to already have the mutex.
|
|
//
|
|
//
|
|
// Arguments: [pv] -- Pointer to block to free
|
|
//
|
|
// Returns: void
|
|
//
|
|
// History: 19-Jul-95 SusiA Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void CSmAllocator::FreeNoMutex(void *pv)
|
|
{
|
|
memDebugOut((DEB_ITRACE, "In CSmAllocator::FreeNoMutex:%p(%p)\n", this, pv));
|
|
|
|
#if !defined(_CHICAGO_)
|
|
#if !defined(MULTIHEAP)
|
|
//ensure we already have the mutex
|
|
memAssert(_dmtx.HaveMutex());
|
|
#endif
|
|
#endif
|
|
DoFree(pv);
|
|
|
|
}
|
|
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CSmAllocator::GetSize, public
|
|
//
|
|
// Synopsis: Return the size of the given block
|
|
//
|
|
// Arguments: [pv] -- Block to get size of
|
|
//
|
|
// Returns: Size of block pointer to by pv
|
|
//
|
|
// History: 29-Mar-94 PhilipLa Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
STDMETHODIMP_(ULONG) CSmAllocator::GetSize(void * pv)
|
|
{
|
|
#if !defined(_CHICAGO_)
|
|
#if !defined(MULTIHEAP)
|
|
CLockDfMutex lckdmtx(_dmtx);
|
|
#endif
|
|
#endif
|
|
|
|
Sync();
|
|
|
|
ULONG ulSize = (ULONG)-1;
|
|
#ifdef FULLIMPL
|
|
memDebugOut((DEB_ITRACE, "In CSmAllocator::GetSize:%p()\n", this));
|
|
if (pv != NULL)
|
|
{
|
|
#if defined(_CHICAGO_)
|
|
ulSize = HeapSize(m_hSharedHeap, 0, pv);
|
|
#else
|
|
CBlockHeader *pbh;
|
|
pbh = (CBlockHeader *)((BYTE *)pv - sizeof(CBlockPreHeader));
|
|
|
|
ulSize = pbh->GetSize() - sizeof(CBlockPreHeader);
|
|
#endif
|
|
}
|
|
|
|
memDebugOut((DEB_ITRACE, "Out CSmAllocator::GetSize\n"));
|
|
#endif
|
|
return ulSize;
|
|
}
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CSmAllocator::DidAlloc, public
|
|
//
|
|
// Synopsis: Return '1' if this heap allocated pointer at pv
|
|
//
|
|
// Arguments: [pv] -- Pointer to block
|
|
//
|
|
// Returns: '1' == This heap allocated block.
|
|
// '0' == This heap did not allocate block.
|
|
// '-1' == Could not determine if this heap allocated block.
|
|
//
|
|
// History: 29-Mar-94 PhilipLa Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
STDMETHODIMP_(int) CSmAllocator::DidAlloc(void FAR * pv)
|
|
{
|
|
int i = -1;
|
|
#ifdef FULLIMPL
|
|
memDebugOut((DEB_ITRACE, "In CSmAllocator::DidAlloc:%p()\n", this));
|
|
#if defined(_CHICAGO_)
|
|
if (HeapValidate(m_hSharedHeap, 0, pv))
|
|
{
|
|
i = 1;
|
|
}
|
|
else
|
|
{
|
|
i = 0;
|
|
}
|
|
#else // !defined(_CHICAGO_)
|
|
#if !defined(MULTIHEAP)
|
|
CLockDfMutex lckdmtx(_dmtx);
|
|
#endif
|
|
|
|
i = ((BYTE *)pv >= _pbBase) && ((BYTE *)pv <= (_pbBase + _cbSize));
|
|
#endif // !defined(_CHICAGO_)
|
|
memDebugOut((DEB_ITRACE, "Out CSmAllocator::DidAlloc\n"));
|
|
#endif
|
|
return i;
|
|
}
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CSmAllocator::HeapMinimize, public
|
|
//
|
|
// Synopsis: Minimize the heap
|
|
//
|
|
// Arguments: None.
|
|
//
|
|
// Returns: void.
|
|
//
|
|
// History: 29-Mar-94 PhilipLa Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
STDMETHODIMP_(void) CSmAllocator::HeapMinimize(void)
|
|
{
|
|
#if !defined(_CHICAGO_)
|
|
#if !defined(MULTIHEAP)
|
|
CLockDfMutex lckdmtx(_dmtx);
|
|
#endif
|
|
#endif
|
|
|
|
memDebugOut((DEB_ITRACE, "In CSmAllocator::HeapMinimize:%p()\n", this));
|
|
|
|
PRINTSTATS;
|
|
|
|
#if defined(_CHICAGO_)
|
|
|
|
HeapCompact(m_hSharedHeap, 0);
|
|
|
|
#else // !defined(_CHICAGO_)
|
|
|
|
CBlockHeader *pbhCurrent;
|
|
CBlockHeader *pbhLast = NULL;
|
|
BYTE *pbEnd = _pbBase + _cbSize;
|
|
|
|
#if DBG == 1
|
|
PrintFreeBlocks();
|
|
GetHeader()->_ulAllocedBytes = 0;
|
|
GetHeader()->_ulFreeBytes = 0;
|
|
GetHeader()->_ulFreeBlocks = 0;
|
|
#endif
|
|
|
|
pbhCurrent = (CBlockHeader *)(_pbBase + sizeof(CHeapHeader));
|
|
|
|
while ((BYTE *)pbhCurrent < pbEnd)
|
|
{
|
|
memAssert(IsAligned(pbhCurrent));
|
|
memAssert((pbhCurrent->GetSize != 0) &&
|
|
"Zero size block found.");
|
|
if (pbhCurrent->IsFree())
|
|
{
|
|
//Check last block. If adjacent, merge them. If not,
|
|
// update pbhNext.
|
|
|
|
if (pbhLast == NULL)
|
|
{
|
|
GetHeader()->SetFirstFree(GetOffset(pbhCurrent));
|
|
#if DBG == 1
|
|
GetHeader()->_ulFreeBlocks = 1;
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
if (pbhLast->GetSize() + GetOffset(pbhLast) ==
|
|
GetOffset(pbhCurrent))
|
|
{
|
|
//Merge the blocks.
|
|
pbhLast->SetSize(pbhLast->GetSize() +
|
|
pbhCurrent->GetSize());
|
|
pbhCurrent = pbhLast;
|
|
}
|
|
else
|
|
{
|
|
#if DBG == 1
|
|
GetHeader()->_ulFreeBytes +=
|
|
(pbhLast->GetSize() - sizeof(CBlockPreHeader));
|
|
GetHeader()->_ulFreeBlocks++;
|
|
#endif
|
|
pbhLast->SetNext(GetOffset(pbhCurrent));
|
|
}
|
|
}
|
|
pbhLast = pbhCurrent;
|
|
}
|
|
#if DBG == 1
|
|
else
|
|
{
|
|
GetHeader()->_ulAllocedBytes +=
|
|
(pbhCurrent->GetSize() - sizeof(CBlockPreHeader));
|
|
}
|
|
#endif
|
|
//Move to next block.
|
|
pbhCurrent =
|
|
(CBlockHeader *)((BYTE *)pbhCurrent + pbhCurrent->GetSize());
|
|
}
|
|
|
|
if (pbhLast != NULL)
|
|
{
|
|
|
|
#if DBG == 1
|
|
GetHeader()->_ulFreeBytes +=
|
|
(pbhLast->GetSize() - sizeof(CBlockPreHeader));
|
|
#endif
|
|
pbhLast->SetNext(0);
|
|
}
|
|
else
|
|
{
|
|
GetHeader()->SetFirstFree(0);
|
|
}
|
|
|
|
GetHeader()->SetCompacted();
|
|
#if DBG == 1
|
|
PrintFreeBlocks();
|
|
#endif
|
|
|
|
#endif // !defined(_CHICAGO_)
|
|
|
|
memDebugOut((DEB_ITRACE, "Out CSmAllocator::HeapMinimize\n"));
|
|
|
|
PRINTSTATS;
|
|
}
|
|
|
|
#if !defined(_CHICAGO_)
|
|
#if DBG == 1
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CSmAllocator::PrintFreeBlocks, private
|
|
//
|
|
// Synopsis: Debug code to print sizes of free blocks
|
|
//
|
|
// History: 25-Apr-94 PhilipLa Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
|
|
void CSmAllocator::PrintFreeBlocks(void)
|
|
{
|
|
CBlockHeader *pbhCurrent = GetAddress(GetHeader()->GetFirstFree());
|
|
|
|
memDebugOut((DEB_PRINT, "There are %lu total free blocks\n",
|
|
GetHeader()->_ulFreeBlocks));
|
|
|
|
while (pbhCurrent != NULL)
|
|
{
|
|
memDebugOut((DEB_PRINT, "Free block %p has size %lu\n", pbhCurrent,
|
|
pbhCurrent->GetSize()));
|
|
pbhCurrent = GetAddress(pbhCurrent->GetNext());
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#ifdef MULTIHEAP
|
|
#if DBG == 1
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CSmAllocator::PrintAllocatedBlocks, private
|
|
//
|
|
// Synopsis: Debug code to find allocated block(s) that leaked
|
|
//
|
|
// History: 25-Nov-95 HenryLee Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
void CSmAllocator::PrintAllocatedBlocks(void)
|
|
{
|
|
CBlockHeader *pbhCurrent;
|
|
CBlockHeader *pbhLast = NULL;
|
|
BYTE *pbEnd = _pbBase + _cbSize;
|
|
ULONG *pul;
|
|
|
|
pbhCurrent = (CBlockHeader *)(_pbBase + sizeof(CHeapHeader));
|
|
|
|
while ((BYTE *)pbhCurrent < pbEnd)
|
|
{
|
|
memAssert(IsAligned(pbhCurrent));
|
|
memAssert((pbhCurrent->GetSize != 0) && "Zero size block found.");
|
|
if (!pbhCurrent->IsFree())
|
|
{
|
|
pul = (ULONG *)((BYTE *)pbhCurrent + sizeof(CBlockHeader));
|
|
memDebugOut((DEB_PRINT, "PrintAllocatedBlocks %p %8x %8x\n",
|
|
pul, *pul, *(pul+1)));
|
|
|
|
}
|
|
pbhCurrent =
|
|
(CBlockHeader *)((BYTE *)pbhCurrent + pbhCurrent->GetSize());
|
|
}
|
|
}
|
|
#endif // DBG == 1
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CSmAllocator::SetState
|
|
//
|
|
// Synopsis: replace thread local state by PerContext state
|
|
//
|
|
// History: 20-Nov-95 Henrylee Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
void CSmAllocator::SetState (CSharedMemoryBlock *psmb, BYTE * pbBase,
|
|
ULONG ulHeapName, CPerContext ** ppcPrev,
|
|
CPerContext *ppcOwner)
|
|
{
|
|
olDebugOut((DEB_ITRACE, "In CSmAllocator::SetState(%p, %p, %lx, %p, %p) (this == %p)\n", psmb, pbBase, ulHeapName, ppcPrev, ppcOwner, this));
|
|
olDebugOut((DEB_ITRACE, "Current allocator owner == %p\n", _ppcOwner));
|
|
|
|
_psmb = psmb;
|
|
_pbBase = pbBase;
|
|
_cbSize = (_psmb) ? _psmb->GetSize() : 0;
|
|
_ulHeapName = ulHeapName;
|
|
DFBASEPTR = _pbBase;
|
|
|
|
if (ppcPrev != NULL)
|
|
*ppcPrev = _ppcOwner;
|
|
_ppcOwner = ppcOwner;
|
|
|
|
memAssert (g_smAllocator.GetBase() == DFBASEPTR);
|
|
olDebugOut((DEB_ITRACE, "Out CSmAllocator::SetState()\n"));
|
|
}
|
|
|
|
//+---------------------------------------------------------------------------
|
|
//
|
|
// Member: CSmAllocator::GetState
|
|
//
|
|
// Synopsis: retrive thread local allocator state into percontext
|
|
//
|
|
// History: 20-Nov-95 Henrylee Created
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
void CSmAllocator::GetState (CSharedMemoryBlock **ppsmb,
|
|
BYTE ** ppbBase, ULONG *pulHeapName)
|
|
{
|
|
*ppsmb = _psmb;
|
|
*ppbBase = _pbBase;
|
|
*pulHeapName = _ulHeapName;
|
|
}
|
|
|
|
//+---------------------------------------------------------------------------
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//
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// Member: CSmAllocator::Uninit
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//
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// Synopsis: unmap the shared memory region
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//
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// History: 20-Nov-95 Henrylee Created
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//
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//----------------------------------------------------------------------------
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SCODE CSmAllocator::Uninit ()
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{
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memDebugOut((DEB_ITRACE, "In CSmAllocator::Uninit\n"));
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if (_psmb != NULL)
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{
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if (_psmb != &g_smb)
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{
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// This is last block in the heap, so we can close the heap
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// now. There must be no shared heap accesses after this.
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BOOL b = VirtualFree(_pbBase - sizeof(CSharedMemHeader),
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0, MEM_RELEASE);
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delete _psmb;
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}
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else
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{
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Reset(); // for g_smb
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}
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_psmb = NULL;
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}
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_pbBase = NULL;
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memDebugOut((DEB_ITRACE, "Out CSmAllocator::Uninit %x\n", _ulHeapName));
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return S_OK;
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}
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#endif // MULTIHEAP
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#endif // !defined(_CHICAGO_)
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