68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/* xalloc.h internal header */
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#ifndef _XALLOC
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#define _XALLOC
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#include <stddef.h>
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#include <stdlib.h>
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#ifndef _YVALS
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#include <yvals.h>
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#endif
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_C_STD_BEGIN
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/* macros */
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#define M_MASK ((1 << _MEMBND) - 1) /* rounds all sizes */
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#define CELL_OFF (offsetof(_Cell, _Next) + M_MASK & ~M_MASK)
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#define SIZE_BLOCK 512 /* minimum block size, power of 2 */
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#define SIZE_CELL (sizeof (_Cell) + M_MASK & ~M_MASK)
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/* type definitions */
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typedef struct _Cell
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{ /* heap item */
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size_t _Size; /* CELL_OFF <= SIZE_CELL <= _Size */
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struct _Cell *_Next; /* reused if CELL_OFF < SIZE_CELL */
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} _Cell;
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typedef struct
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{ /* heap control information */
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_Cell **_Plast; /* null, or where to resume malloc scan */
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_Cell *_Head; /* null, or lowest addressed free cell */
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} _Altab;
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/* declarations */
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_C_LIB_DECL
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void *_Getmem(size_t);
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extern _Altab _Aldata; /* free list initially empty */
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_END_C_LIB_DECL
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#if _INTELx86
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/* #define _PTR_NORM(p) (void __huge *)(p) should have worked */
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#define _PTR_NORM(p) \
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( (((unsigned long)(p) & 0xFFFF0000L)>>12) \
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+ ((unsigned long)(p) & 0xFFFFL) )
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#else
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#define _PTR_NORM(p) (p)
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#endif
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#ifdef DEBUG
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#include <assert.h>
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#define ASSERT(e) assert(e)
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_C_LIB_DECL
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int _OK_Cell(_Cell *p);
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int _OK_Altab(_Altab *p);
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void _UPD_Altab(size_t d_heap, size_t d_alloc, size_t d_free);
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_END_C_LIB_DECL
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#else /* is NDEBUG */
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#define ASSERT(e) (void)0
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#define _OK_Cell(p) (void)0
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#define _OK_Altab(p) (void)0
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#define _UPD_Altab(d_heap, d_alloc, d_free) (void)0
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#endif /*DEBUG*/
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_C_STD_END
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#endif /* _XALLOC */
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/*
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* Copyright (c) 1994-2000 by P.J. Plauger. ALL RIGHTS RESERVED.
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* Consult your license regarding permissions and restrictions.
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V3.05:1296 */
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/* __SRCVERSION("xalloc.h $Rev: 153052 $"); */
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