1 /***********************************************************************
2 * *
3 * This software is part of the ast package *
4 * Copyright (c) 1985-2010 AT&T Intellectual Property *
5 * and is licensed under the *
6 * Common Public License, Version 1.0 *
7 * by AT&T Intellectual Property *
8 * *
9 * A copy of the License is available at *
10 * http://www.opensource.org/licenses/cpl1.0.txt *
11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
12 * *
13 * Information and Software Systems Research *
14 * AT&T Research *
15 * Florham Park NJ *
16 * *
17 * Glenn Fowler <gsf@research.att.com> *
18 * David Korn <dgk@research.att.com> *
19 * Phong Vo <kpv@research.att.com> *
20 * *
21 ***********************************************************************/
22 #if defined(_UWIN) && defined(_BLD_ast)
23
_STUB_vmset()24 void _STUB_vmset(){}
25
26 #else
27
28 #include "vmhdr.h"
29
30
31 /* Set the control flags for a region.
32 **
33 ** Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
34 */
35 #if __STD_C
vmset(reg Vmalloc_t * vm,int flags,int on)36 int vmset(reg Vmalloc_t* vm, int flags, int on)
37 #else
38 int vmset(vm, flags, on)
39 reg Vmalloc_t* vm; /* region being worked on */
40 int flags; /* flags must be in VM_FLAGS */
41 int on; /* !=0 if turning on, else turning off */
42 #endif
43 {
44 reg int mode, inuse;
45 reg Vmdata_t* vd = vm->data;
46
47 if(flags == 0 && on == 0)
48 return vd->mode;
49
50 SETINUSE(vd, inuse);
51 if(!(vd->mode&VM_TRUST) )
52 { if(ISLOCK(vd,0))
53 { CLRINUSE(vd, inuse);
54 return 0;
55 }
56 SETLOCK(vd,0);
57 }
58
59 mode = vd->mode;
60
61 if(on)
62 vd->mode |= (flags&VM_FLAGS);
63 else vd->mode &= ~(flags&VM_FLAGS);
64
65 if(vd->mode&(VM_TRACE|VM_MTDEBUG))
66 vd->mode &= ~VM_TRUST;
67
68 CLRLOCK(vd,0);
69 CLRINUSE(vd, inuse);
70
71 return mode;
72 }
73
74 #endif
75