Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
att
GitHub Repository: att/ast
 Path: blob/master/src/lib/libast/astsa/vmalloc.h
1810 views
1
/***********************************************************************

2
*                                                                      *

3
*               This software is part of the ast package               *

4
*          Copyright (c) 1985-2012 AT&T Intellectual Property          *

5
*                      and is licensed under the                       *

6
*                 Eclipse Public License, Version 1.0                  *

7
*                    by AT&T Intellectual Property                     *

8
*                                                                      *

9
*                A copy of the License is available at                 *

10
*          http://www.eclipse.org/org/documents/epl-v10.html           *

11
*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

12
*                                                                      *

13
*              Information and Software Systems Research               *

14
*                            AT&T Research                             *

15
*                           Florham Park NJ                            *

16
*                                                                      *

17
*                 Glenn Fowler <[email protected]>                  *

18
*                  David Korn <[email protected]>                   *

19
*                   Phong Vo <[email protected]>                    *

20
*                                                                      *

21
***********************************************************************/

22
/*

23
 * standalone mini vmalloc interface

24
 */

25


26
#ifndef _VMALLOC_H

27
#define _VMALLOC_H		1

28


29
#define vmalloc(v,n)		_vm_resize(v,(void*)0,n)

30
#define vmalign(v,n,a)		_vm_resize(v,(void*)0,n)

31
#define vmclose(v)		_vm_close(v)

32
#define vmfree(v,p)

33
#define vmnewof(v,o,t,n,x)	(t*)_vm_resize(v,(void*)o,sizeof(t)*(n)+(x))

34
#define vmopen(a,b,c)		_vm_open()

35


36
#define VM_CHUNK		(32*1024)

37
#define VM_ALIGN		16

38


39
typedef struct Vmchunk_s

40
{

41
	struct Vmchunk_s*	next;

42
	char			align[VM_ALIGN - sizeof(struct Vmchunk_s*)];

43
	char			data[VM_CHUNK - VM_ALIGN];

44
} Vmchunk_t;

45


46
typedef struct Vmalloc_s

47
{

48
	Vmchunk_t		base;		

49
	Vmchunk_t*		current;

50
	char*			data;

51
	long			size;

52
	long			last;

53
} Vmalloc_t;

54


55
extern Vmalloc_t*		Vmregion;

56


57
extern int			_vm_close(Vmalloc_t*);

58
extern Vmalloc_t*		_vm_open(void);

59
extern void*			_vm_resize(Vmalloc_t*, void*, unsigned long);

60


61
#endif

62


63