1*4887Schin /*********************************************************************** 2*4887Schin * * 3*4887Schin * This software is part of the ast package * 4*4887Schin * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5*4887Schin * and is licensed under the * 6*4887Schin * Common Public License, Version 1.0 * 7*4887Schin * by AT&T Knowledge Ventures * 8*4887Schin * * 9*4887Schin * A copy of the License is available at * 10*4887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 11*4887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12*4887Schin * * 13*4887Schin * Information and Software Systems Research * 14*4887Schin * AT&T Research * 15*4887Schin * Florham Park NJ * 16*4887Schin * * 17*4887Schin * Glenn Fowler <gsf@research.att.com> * 18*4887Schin * David Korn <dgk@research.att.com> * 19*4887Schin * Phong Vo <kpv@research.att.com> * 20*4887Schin * * 21*4887Schin ***********************************************************************/ 22*4887Schin #pragma prototyped 23*4887Schin 24*4887Schin /* 25*4887Schin * dtopen() with handle placed in specific vm region 26*4887Schin */ 27*4887Schin 28*4887Schin #include <dt.h> 29*4887Schin 30*4887Schin typedef struct Dc_s 31*4887Schin { 32*4887Schin Dtdisc_t ndisc; 33*4887Schin Dtdisc_t* odisc; 34*4887Schin Vmalloc_t* vm; 35*4887Schin } Dc_t; 36*4887Schin 37*4887Schin static int 38*4887Schin eventf(Dt_t* dt, int op, void* data, Dtdisc_t* disc) 39*4887Schin { 40*4887Schin Dc_t* dc = (Dc_t*)disc; 41*4887Schin int r; 42*4887Schin 43*4887Schin if (dc->odisc->eventf && (r = (*dc->odisc->eventf)(dt, op, data, dc->odisc))) 44*4887Schin return r; 45*4887Schin return op == DT_ENDOPEN ? 1 : 0; 46*4887Schin } 47*4887Schin 48*4887Schin static void* 49*4887Schin memoryf(Dt_t* dt, void* addr, size_t size, Dtdisc_t* disc) 50*4887Schin { 51*4887Schin return vmresize(((Dc_t*)disc)->vm, addr, size, VM_RSMOVE); 52*4887Schin } 53*4887Schin 54*4887Schin /* 55*4887Schin * open a dictionary using disc->memoryf if set or vm otherwise 56*4887Schin */ 57*4887Schin 58*4887Schin Dt_t* 59*4887Schin dtnew(Vmalloc_t* vm, Dtdisc_t* disc, Dtmethod_t* meth) 60*4887Schin { 61*4887Schin Dt_t* dt; 62*4887Schin Dc_t dc; 63*4887Schin 64*4887Schin dc.odisc = disc; 65*4887Schin dc.ndisc = *disc; 66*4887Schin dc.ndisc.eventf = eventf; 67*4887Schin if (!dc.ndisc.memoryf) 68*4887Schin dc.ndisc.memoryf = memoryf; 69*4887Schin dc.vm = vm; 70*4887Schin if (dt = dtopen(&dc.ndisc, meth)) 71*4887Schin dtdisc(dt, disc, DT_SAMECMP|DT_SAMEHASH); 72*4887Schin return dt; 73*4887Schin } 74