xref: /onnv-gate/usr/src/lib/libast/common/vmalloc/vmdisc.c (revision 12068:08a39a083754)
14887Schin /***********************************************************************
24887Schin *                                                                      *
34887Schin *               This software is part of the ast package               *
4*12068SRoger.Faulkner@Oracle.COM *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
54887Schin *                      and is licensed under the                       *
64887Schin *                  Common Public License, Version 1.0                  *
78462SApril.Chin@Sun.COM *                    by AT&T Intellectual Property                     *
84887Schin *                                                                      *
94887Schin *                A copy of the License is available at                 *
104887Schin *            http://www.opensource.org/licenses/cpl1.0.txt             *
114887Schin *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
124887Schin *                                                                      *
134887Schin *              Information and Software Systems Research               *
144887Schin *                            AT&T Research                             *
154887Schin *                           Florham Park NJ                            *
164887Schin *                                                                      *
174887Schin *                 Glenn Fowler <gsf@research.att.com>                  *
184887Schin *                  David Korn <dgk@research.att.com>                   *
194887Schin *                   Phong Vo <kpv@research.att.com>                    *
204887Schin *                                                                      *
214887Schin ***********************************************************************/
224887Schin #if defined(_UWIN) && defined(_BLD_ast)
234887Schin 
_STUB_vmdisc()244887Schin void _STUB_vmdisc(){}
254887Schin 
264887Schin #else
274887Schin 
284887Schin #include	"vmhdr.h"
294887Schin 
304887Schin /*	Change the discipline for a region.  The old discipline
314887Schin **	is returned.  If the new discipline is NIL then the
324887Schin **	discipline is not changed.
334887Schin **
344887Schin **	Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94.
354887Schin */
364887Schin #if __STD_C
vmdisc(Vmalloc_t * vm,Vmdisc_t * disc)374887Schin Vmdisc_t* vmdisc(Vmalloc_t* vm, Vmdisc_t* disc)
384887Schin #else
394887Schin Vmdisc_t* vmdisc(vm, disc)
404887Schin Vmalloc_t*	vm;
414887Schin Vmdisc_t*	disc;
424887Schin #endif
434887Schin {
444887Schin 	Vmdisc_t*	old = vm->disc;
454887Schin 
464887Schin 	if(disc)
474887Schin 	{	if(disc->memoryf != old->memoryf)
484887Schin 			return NIL(Vmdisc_t*);
494887Schin 		if(old->exceptf &&
504887Schin 		   (*old->exceptf)(vm,VM_DISC,(Void_t*)disc,old) != 0 )
514887Schin 			return NIL(Vmdisc_t*);
524887Schin 		vm->disc = disc;
534887Schin 	}
544887Schin 	return old;
554887Schin }
564887Schin 
574887Schin #endif
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