1/*********************************************************************** 2* * 3* This software is part of the ast package * 4* Copyright (c) 1985-2011 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 <gsf@research.att.com> * 18* David Korn <dgk@research.att.com> * 19* Phong Vo <kpv@research.att.com> * 20* * 21***********************************************************************/ 22#pragma prototyped 23 24/* 25 * dtopen() with handle placed in specific vm region 26 */ 27 28#include <dt.h> 29 30typedef struct Dc_s 31{ 32 Dtdisc_t ndisc; 33 Dtdisc_t* odisc; 34 Vmalloc_t* vm; 35} Dc_t; 36 37static int 38eventf(Dt_t* dt, int op, void* data, Dtdisc_t* disc) 39{ 40 Dc_t* dc = (Dc_t*)disc; 41 int r; 42 43 if (dc->odisc->eventf && (r = (*dc->odisc->eventf)(dt, op, data, dc->odisc))) 44 return r; 45 return op == DT_ENDOPEN ? 1 : 0; 46} 47 48static void* 49memoryf(Dt_t* dt, void* addr, size_t size, Dtdisc_t* disc) 50{ 51 return vmresize(((Dc_t*)disc)->vm, addr, size, VM_RSMOVE); 52} 53 54/* 55 * open a dictionary using disc->memoryf if set or vm otherwise 56 */ 57 58Dt_t* 59_dtnew(Vmalloc_t* vm, Dtdisc_t* disc, Dtmethod_t* meth, unsigned long version) 60{ 61 Dt_t* dt; 62 Dc_t dc; 63 64 dc.odisc = disc; 65 dc.ndisc = *disc; 66 dc.ndisc.eventf = eventf; 67 if (!dc.ndisc.memoryf) 68 dc.ndisc.memoryf = memoryf; 69 dc.vm = vm; 70 if (dt = _dtopen(&dc.ndisc, meth, version)) 71 dtdisc(dt, disc, DT_SAMECMP|DT_SAMEHASH); 72 return dt; 73} 74 75#undef dtnew 76 77Dt_t* 78dtnew(Vmalloc_t* vm, Dtdisc_t* disc, Dtmethod_t* meth) 79{ 80 return _dtnew(vm, disc, meth, 20050420L); 81} 82