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/* sac.h: SEGREGATED ALLOCATION CACHES INTERFACE
 *
 * $Id: //info.ravenbrook.com/project/mps/master/code/sac.h#16 $
 * Copyright (c) 2001-2020 Ravenbrook Limited.  See end of file for license.
 */

#ifndef sac_h
#define sac_h

#include "mpmtypes.h"
#include "mpm.h" /* for PoolArena */


#define sacClassLIMIT ((Count)8)


/* SAC -- the real segregated allocation caches */

#define SACSig ((Sig)0x5195AC99) /* SIGnature SAC */

typedef struct SACStruct *SAC;

typedef struct SACStruct {
  Sig sig;             /* design.mps.sig.field */
  Pool pool;
  Count classesCount;  /* number of classes */
  Index middleIndex;   /* index of the middle */
  _mps_sac_s esac_s;   /* variable length, must be last */
} SACStruct;

#define SACOfExternalSAC(esac) PARENT(SACStruct, esac_s, esac)

#define ExternalSACOfSAC(sac) (&((sac)->esac_s))

#define SACArena(sac) PoolArena((sac)->pool)


/* SACClasses -- structure for specifying classes in the cache */
/* .sacc: This structure must match <code/mps.h#sacc>. */

typedef struct mps_sac_classes_s *SACClasses;


extern Res SACCreate(SAC *sac_o, Pool pool, Count classesCount,
                     SACClasses classes);
extern void SACDestroy(SAC sac);
extern Res SACFill(Addr *p_o, SAC sac, Size size);
extern void SACEmpty(SAC sac, Addr p, Size size);
extern void SACFlush(SAC sac);


#endif /* sac_h */


/* C. COPYRIGHT AND LICENSE
 *
 * Copyright (C) 2001-2020 Ravenbrook Limited <https://www.ravenbrook.com/>.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */