37 lines
1.1 KiB
C
37 lines
1.1 KiB
C
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/* $Id: mempool.h,v 1.2 1997/11/13 23:53:09 colin Exp $ */
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#ifndef MEMPOOL_H
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#define MEMPOOL_H
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typedef struct MemPool {
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struct PoolBuf *head;
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char *freeptr;
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unsigned freespace;
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unsigned chunksize; /* Default starting point */
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unsigned long totalsize;
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int (*purge)(void *); /* Return non-zero to retry alloc */
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void *purgearg;
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} MemPool;
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/* A global pool for miscellaneous stuff. */
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extern struct MemPool MiscPool;
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/*
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* Nice clean interfaces
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*/
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void memPoolInit(struct MemPool *pool);
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void memPoolSetPurge(struct MemPool *pool, int (*purge)(void *), void *arg);
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void memPoolEmpty(struct MemPool *pool);
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void memPoolCutBack(struct MemPool *dest, struct MemPool const *cutback);
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void *memPoolAlloc(struct MemPool *pool, unsigned len, unsigned alignment);
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#ifdef DEADCODE
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char const *memPoolStore(struct MemPool *pool, char const *str);
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#endif
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/* Lookie here! An ASNI-compliant alignment finder! */
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#define alignof(type) (sizeof(struct{type _x; char _y;}) - sizeof(type))
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#define memPoolNew(pool, type) memPoolAlloc(pool, sizeof(type), alignof(type))
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#endif /* MEMPOOL_H */
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