mirror of
git://git.sv.gnu.org/emacs.git
synced 2025-12-24 14:30:43 -08:00
c0bb4cd3cd
This change will be integrated but ignored (-ay) to the gg-epcore/union sources, so that they retain HopeNames. Copied from Perforce Change: 24911 ServerID: perforce.ravenbrook.com
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
/* impl.h.poolmfs draft impl
|
|
*
|
|
* MANUAL FIXED SMALL UNIT POOL
|
|
*
|
|
* $Id$
|
|
*
|
|
* Copyright (c) 2001 Ravenbrook Limited.
|
|
*
|
|
* The MFS pool is used to manage small fixed-size chunks of memory. It
|
|
* stores control structures in the memory it manages, rather than to one
|
|
* side. It therefore achieves better locality for small objects, but
|
|
* wastes memory for large objects. It should not be used unless you are
|
|
* packing a reasonable number of objects on to a page.
|
|
*
|
|
* Create and Init take the following arguments:
|
|
*
|
|
* Size extendBy
|
|
*
|
|
* extendBy is the default number of bytes reserved by the pool at a time.
|
|
* A large size will make allocation cheaper but have a higher resource
|
|
* overhead. A typical value might be 65536. See note 2.
|
|
*
|
|
* Size unitSize
|
|
*
|
|
* unitSize is the size in bytes of the objects you with to allocate. It
|
|
* must be larger than the minimum unit size returned by GetInfo, and not
|
|
* larger than extendBy.
|
|
*/
|
|
|
|
#ifndef poolmfs_h
|
|
#define poolmfs_h
|
|
|
|
#include "mpm.h"
|
|
|
|
typedef struct MFSStruct *MFS;
|
|
|
|
extern PoolClass PoolClassMFS(void);
|
|
|
|
extern Bool MFSCheck(MFS mfs);
|
|
extern Pool (MFSPool)(MFS mfs);
|
|
|
|
|
|
typedef const struct MFSInfoStruct *MFSInfo;
|
|
|
|
struct MFSInfoStruct {
|
|
Size unitSizeMin; /* minimum unit size */
|
|
};
|
|
|
|
extern MFSInfo MFSGetInfo(void);
|
|
|
|
#endif /* poolmfs_h */
|