46 lines
999 B
C++
46 lines
999 B
C++
/*++
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Copyright (c) 1996 Microsoft Corporation
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Module Name: hndlmgr.hxx
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Abstract:
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Interfaces to manage a heap of handles with a free list.
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All methods assume caller has serialized concurrent access.
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Author:
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Rajeev Dujari (rajeevd) 08-Nov-96
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Revision History:
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--*/
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struct HNDLHEAP
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{
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DWORD_PTR dwNumHandles; // current number of handles in array
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DWORD dwNumInUse; // number of handles in use
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DWORD_PTR dwMaxHandles; // lowest value returned by allocator
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DWORD_PTR dwFirstFree; // index of first free element in array
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LPVOID pvHandles[1]; // array of handle values
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};
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class HNDLMGR
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{
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HNDLHEAP* pHeap;
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BOOL IsValidOffset (DWORD_PTR dwp);
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public:
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HNDLMGR() {pHeap = NULL;}
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void Destroy (void);
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BOOL InUse(void) {return pHeap && pHeap->dwNumInUse;}
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HANDLE Alloc (DWORD cbAlloc);
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LPVOID Map (HANDLE h);
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BOOL Free (HANDLE h);
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VOID InvalidateAll();
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};
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