mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-12 18:07:06 +03:00
208 lines
7.2 KiB
C
208 lines
7.2 KiB
C
/****************************************************************************
|
|
*
|
|
* Open Watcom Project
|
|
*
|
|
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
|
|
*
|
|
* ========================================================================
|
|
*
|
|
* This file contains Original Code and/or Modifications of Original
|
|
* Code as defined in and that are subject to the Sybase Open Watcom
|
|
* Public License version 1.0 (the 'License'). You may not use this file
|
|
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
|
|
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
|
|
* provided with the Original Code and Modifications, and is also
|
|
* available at www.sybase.com/developer/opensource.
|
|
*
|
|
* The Original Code and all software distributed under the License are
|
|
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
|
|
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
|
|
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
|
|
* NON-INFRINGEMENT. Please see the License for the specific language
|
|
* governing rights and limitations under the License.
|
|
*
|
|
* ========================================================================
|
|
*
|
|
* Description: Heap library configuration for various platforms.
|
|
*
|
|
****************************************************************************/
|
|
|
|
|
|
#include "variety.h"
|
|
|
|
#if defined(_M_IX86)
|
|
#include <i86.h>
|
|
#endif
|
|
|
|
#if !defined(__DOS_EXT__)
|
|
#if defined(__386__) && \
|
|
!defined(__WINDOWS_386__) && \
|
|
!defined(__WINDOWS__) && \
|
|
!defined(__OS2__) && \
|
|
!defined(__NT__) && \
|
|
!defined(__OSI__) && \
|
|
!defined(__UNIX__)
|
|
#define __DOS_EXT__
|
|
#endif
|
|
#endif
|
|
|
|
typedef unsigned int tag;
|
|
typedef struct freelistp frl;
|
|
typedef struct freelistp _WCNEAR *frlptr;
|
|
typedef struct freelist _WCFAR *farfrlptr;
|
|
typedef unsigned char _WCNEAR *PTR;
|
|
typedef unsigned char _WCFAR *FARPTR;
|
|
typedef struct miniheapblkp _WCNEAR *mheapptr;
|
|
|
|
/*
|
|
** NOTE: the size of these data structures is critical to the alignemnt
|
|
** of the pointers returned by malloc().
|
|
*/
|
|
struct freelist {
|
|
tag len; /* length of block in free list */
|
|
unsigned int prev; /* offset of previous block in free list */
|
|
unsigned int next; /* offset of next block in free list */
|
|
};
|
|
struct heapblk {
|
|
tag heaplen; /* size of heap (0 = 64K) */
|
|
unsigned int prevseg; /* segment selector for previous heap */
|
|
unsigned int nextseg; /* segment selector for next heap */
|
|
unsigned int rover; /* roving pointer into free list */
|
|
unsigned int b4rover; /* largest block before rover */
|
|
unsigned int largest_blk; /* largest block in the heap */
|
|
unsigned int numalloc; /* number of allocated blocks in heap */
|
|
unsigned int numfree; /* number of free blocks in the heap */
|
|
struct freelist freehead; /* listhead of free blocks in heap */
|
|
};
|
|
|
|
struct freelistp {
|
|
tag len;
|
|
frlptr prev;
|
|
frlptr next;
|
|
};
|
|
struct heapblkp {
|
|
tag heaplen;
|
|
unsigned int prevseg;
|
|
unsigned int nextseg;
|
|
frlptr rover;
|
|
unsigned int b4rover;
|
|
unsigned int largest_blk;
|
|
unsigned int numalloc;
|
|
unsigned int numfree;
|
|
frl freehead;
|
|
};
|
|
|
|
struct miniheapblkp {
|
|
tag len;
|
|
mheapptr prev;
|
|
mheapptr next;
|
|
frlptr rover;
|
|
unsigned int b4rover;
|
|
unsigned int largest_blk;
|
|
unsigned int numalloc;
|
|
unsigned int numfree;
|
|
frl freehead;
|
|
};
|
|
|
|
struct heapstart {
|
|
struct heapblk h;
|
|
struct freelist first;
|
|
};
|
|
|
|
struct heapend {
|
|
tag last_tag;
|
|
struct freelist last;
|
|
};
|
|
|
|
#ifdef __DOS_EXT__
|
|
struct dpmi_hdr {
|
|
unsigned long dpmi_handle;
|
|
tag dos_seg_value; // 0 => DPMI block, else DOS segment
|
|
};
|
|
#endif
|
|
|
|
extern unsigned _curbrk;
|
|
extern mheapptr _WCNEAR __nheapbeg;
|
|
#if defined(_M_IX86)
|
|
extern __segment __fheap;
|
|
extern __segment __bheap;
|
|
extern __segment __fheapRover;
|
|
#endif
|
|
extern int __heap_enabled;
|
|
extern unsigned int __LargestSizeB4Rover;
|
|
extern struct miniheapblkp _WCNEAR *__MiniHeapRover;
|
|
extern unsigned int __LargestSizeB4MiniHeapRover;
|
|
extern struct miniheapblkp _WCNEAR *__MiniHeapFreeRover;
|
|
|
|
extern size_t __LastFree( void );
|
|
extern int __NHeapWalk( struct _heapinfo *entry, mheapptr heapbeg );
|
|
extern int __ExpandDGROUP( unsigned int __amt );
|
|
#if defined(_M_IX86)
|
|
extern unsigned __AllocSeg( unsigned int __amt );
|
|
extern unsigned __GrowSeg( __segment __seg, unsigned int __amt );
|
|
extern int __FreeSeg( __segment seg );
|
|
extern int __HeapWalk( struct _heapinfo *entry, __segment seg, unsigned all );
|
|
extern int __HeapMin( __segment seg, unsigned one_seg );
|
|
extern int __HeapSet( __segment seg, unsigned fill );
|
|
#endif
|
|
|
|
#if defined(__DOS_EXT__)
|
|
extern void __FreeDPMIBlocks( void );
|
|
extern void *__ReAllocDPMIBlock( frlptr p1, unsigned req_size );
|
|
extern void *__ExpandDPMIBlock( frlptr, unsigned );
|
|
#endif
|
|
|
|
extern int __HeapManager_expand( __segment seg, unsigned offset,
|
|
size_t req_size, size_t *growth_size );
|
|
|
|
extern void _WCFAR __HeapInit( void _WCNEAR *start, unsigned int amount );
|
|
|
|
_WCRTLINK extern void _WCNEAR *__brk( unsigned );
|
|
|
|
#if defined(_M_IX86)
|
|
#define _DGroup() FP_SEG((&__nheapbeg))
|
|
#else
|
|
#define _DGroup() 0
|
|
#endif
|
|
// __IsCtsNHeap() is used to determine whether the operating system provides
|
|
// a continuous near heap block. __ExpandDGroup should slice for more near
|
|
// heap under those operating systems with __IsCtsNHeap() == 1.
|
|
#if defined(__WARP__) || \
|
|
defined(__NT__) || \
|
|
defined(__WINDOWS_386__) || \
|
|
defined(__WINDOWS_286__)
|
|
#define __IsCtsNHeap() 0
|
|
#elif defined(__DOS_EXT__)
|
|
#define __IsCtsNHeap() ((_IsRationalZeroBase() || _IsCodeBuilder()) ? 0 : 1)
|
|
#else
|
|
#define __IsCtsNHeap() 1
|
|
#endif
|
|
|
|
extern unsigned __MemAllocator( unsigned __sz, unsigned __seg, unsigned __off );
|
|
extern void __MemFree( unsigned __ptr, unsigned __seg, unsigned __off );
|
|
#if defined(_M_IX86)
|
|
#if defined(__386__)
|
|
#pragma aux __MemAllocator "*" parm [eax] [edx] [ebx];
|
|
#pragma aux __MemFree "*" parm [eax] [edx] [ebx];
|
|
#else
|
|
#pragma aux __MemAllocator "*" parm [ax] [dx] [bx];
|
|
#pragma aux __MemFree "*" parm [ax] [dx] [bx];
|
|
#endif
|
|
#endif
|
|
|
|
#define PARAS_IN_64K (0x1000)
|
|
#define END_TAG (~0)
|
|
|
|
#define TAG_SIZE (sizeof(tag))
|
|
#if defined(M_I86)
|
|
#define ROUND_SIZE (TAG_SIZE-1)
|
|
#else
|
|
#define ROUND_SIZE (TAG_SIZE+TAG_SIZE-1)
|
|
#endif
|
|
#define FRL_SIZE ((sizeof(frl)+ROUND_SIZE)&~ROUND_SIZE)
|
|
|
|
#define __HM_SUCCESS 0
|
|
#define __HM_FAIL 1
|
|
#define __HM_TRYGROW 2
|