81 lines
1.6 KiB
C++
81 lines
1.6 KiB
C++
/*++
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Copyright (c) 1993-1999 Microsoft Corporation
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Module Name:
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pool.h
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Abstract:
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Fixed size memory allocator headers.
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Author:
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Bill Bolosky [bolosky] 1993
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Revision History:
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--*/
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struct PoolEntry;
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struct PoolBlob;
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class Pool {
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public:
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Pool(
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unsigned objectSize,
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void * (*allocator)(unsigned) = NULL,
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unsigned blobSize = 16334, // a little under 16K
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void (*destructor)(void *) = NULL);
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Pool(
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unsigned objectSize,
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void * (*allocator)(void));
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~Pool(void);
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void preAllocate(
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unsigned n);
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void *allocate(void);
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void free(
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void *object);
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unsigned numAllocations(void);
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unsigned numFrees(void);
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unsigned numNews(void);
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unsigned getObjectSize(void);
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private:
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PoolEntry *getEntry(void);
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void releaseEntry(
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PoolEntry *entry);
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void allocateMoreObjects(void);
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unsigned objectSize;
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void *(*countAllocator)(unsigned);
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void *(*singleAllocator)(void);
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void (*destructor)(void *);
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struct PoolEntry *entries; // PoolEntries with vaid data attached to them
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struct PoolEntry *freeEntries; // PoolEntries without valid data attached to them
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struct PoolBlob *entriesBlobHead; // The head of the blob list for PoolEntries
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unsigned entriesPerBlob; // How many entries in an entry blob
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struct PoolBlob *objectsBlobHead; // The head of the blob list for the allocated objects
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unsigned objectsPerBlob; // How many objects in an object blob
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unsigned allocations;
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unsigned frees;
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unsigned news;
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unsigned numFree; // Current size of free list
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};
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