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51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
/* impl.h.poolmfs draft impl
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*
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* MANUAL FIXED SMALL UNIT POOL
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*
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* $HopeName: MMsrc!poolmfs.h(MMdevel_restr2.2) $
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*
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* Copyright (C) 1994,1995 Harlequin Group, all rights reserved
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*
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* The MFS pool is used to manage small fixed-size chunks of memory. It
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* stores control structures in the memory it manages, rather than to one
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* side. It therefore achieves better locality for small objects, but
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* wastes memory for large objects. It should not be used unless you are
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* packing a reasonable number of objects on to a page.
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*
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* Create and Init take the following arguments:
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*
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* Size extendBy
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*
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* extendBy is the default number of bytes reserved by the pool at a time.
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* A large size will make allocation cheaper but have a higher resource
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* overhead. A typical value might be 65536. See note 2.
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*
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* Size unitSize
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*
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* unitSize is the size in bytes of the objects you with to allocate. It
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* must be larger than the minimum unit size returned by GetInfo, and not
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* larger than extendBy.
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*/
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#ifndef poolmfs_h
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#define poolmfs_h
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#include "mpm.h"
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typedef struct MFSStruct *MFS;
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extern PoolClass PoolClassMFS(void);
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extern Bool MFSCheck(MFS mfs);
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extern Pool (MFSPool)(MFS mfs);
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typedef const struct MFSInfoStruct *MFSInfo;
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struct MFSInfoStruct {
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Size unitSizeMin; /* minimum unit size */
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};
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extern MFSInfo MFSGetInfo(void);
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#endif /* poolmfs_h */
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