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      1 /*---------------------------------------------------------------------------*
      2  *  pmalloc.h  *
      3  *                                                                           *
      4  *  Copyright 2007, 2008 Nuance Communciations, Inc.                               *
      5  *                                                                           *
      6  *  Licensed under the Apache License, Version 2.0 (the 'License');          *
      7  *  you may not use this file except in compliance with the License.         *
      8  *                                                                           *
      9  *  You may obtain a copy of the License at                                  *
     10  *      http://www.apache.org/licenses/LICENSE-2.0                           *
     11  *                                                                           *
     12  *  Unless required by applicable law or agreed to in writing, software      *
     13  *  distributed under the License is distributed on an 'AS IS' BASIS,        *
     14  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
     15  *  See the License for the specific language governing permissions and      *
     16  *  limitations under the License.                                           *
     17  *                                                                           *
     18  *---------------------------------------------------------------------------*/
     19 
     20 
     21 
     22 /* xalloc.h internal header */
     23 #ifndef _PMALLOC
     24 #define _PMALLOC
     25 
     26 #ifdef __cplusplus
     27 extern "C"
     28 {
     29 #endif
     30 
     31 #ifndef _STD
     32 #define _STD
     33 #endif
     34 #define _STD_BEGIN
     35 #define _STD_END
     36 
     37   typedef unsigned int psize_t;
     38 
     39 #ifndef DKoffsetof
     40 #define DKoffsetof(T, member) ((_STD psize_t)&(((T *)0)->member))
     41 #endif
     42 
     43   /* storage alignment properties */
     44 #define DK_AUPBND 1U /* even-byte boundaries (2^^1) */
     45 #define DK_ADNBND 1U
     46 #define DK_MEMBND 2U /* cts : 4 byte malloc boundaries (3 ==> 8 byte) */
     47 
     48 #ifndef NULL
     49 #define NULL 0
     50 #endif
     51 
     52   _STD_BEGIN
     53   /* macros */
     54 #define M_MASK ((1 << DK_MEMBND) - 1) /* rounds all sizes */
     55 #define CELL_OFF ((DKoffsetof(_Cell, _Next) + M_MASK) & ~M_MASK)
     56 #define SIZE_BLOCK   256   /* minimum block size, power of 2 */
     57 #define SIZE_CELL ((sizeof (_Cell) + M_MASK) & ~M_MASK)
     58   /* type definitions */
     59   typedef struct _Cell
     60   {
     61     psize_t _Size; /* CELL_OFF <= SIZE_CELL <= _Size */
     62     struct _Cell *_Next; /* reused if CELL_OFF < SIZE_CELL */
     63   }
     64   _Cell;
     65   typedef struct
     66   {
     67     _Cell **_Plast; /* null, or where to resume malloc scan */
     68     _Cell *_Head; /* null, or lowest addressed free cell */
     69   }
     70   _Altab;
     71   /* declarations */
     72 
     73   void *_Getmem(psize_t);
     74   extern _Altab _Aldata; /* free list initially empty */
     75 
     76 #if _INTELx86
     77   /* #define _PTR_NORM(p) (void __huge *)(p) should have worked */
     78 #define _PTR_NORM(p) \
     79   ( (((unsigned long)(p) & 0xFFFF0000L)>>12) \
     80     + ((unsigned long)(p) & 0xFFFFL) )
     81 #else
     82 #define _PTR_NORM(p) (p)
     83 #endif
     84 
     85 
     86 #if DEBUG
     87   int _OK_Cell(_Cell *p);
     88   int _OK_Altab(_Altab *p);
     89   void _UPD_Altab(psize_t d_heap, psize_t d_alloc, psize_t d_free);
     90 #else
     91 #define _OK_Cell(p) (void)0
     92 #define _OK_Altab(p) (void)0
     93 #define _UPD_Altab(d_heap, d_alloc, d_free) (void)0
     94 #endif /*DEBUG*/
     95   _STD_END
     96 
     97   /* function prototypes */
     98   void    PortMallocSetPoolSize(psize_t size);
     99   psize_t PortMallocGetPoolSize(void);
    100   int     PortMallocGetMaxMemUsed(void);
    101   void    PortMallocInit(void);
    102   void    PortMallocTerm(void);
    103   void *(PortMalloc)(psize_t size_arg);
    104   void(PortFree)(void *ptr);
    105 
    106 #ifdef __cplusplus
    107 } /* end extern "C" */
    108 #endif
    109 
    110 #endif /* _PMALLOC */
    111 
    112 
    113 
    114