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 #if defined(_UWIN) && defined(_BLD_ast) 23 _STUB_vmclear()24void _STUB_vmclear(){} 25 26 #else 27 28 #include "vmhdr.h" 29 30 /* Clear out all allocated space. 31 ** 32 ** Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94. 33 */ 34 #if __STD_C vmclear(Vmalloc_t * vm)35int vmclear(Vmalloc_t* vm) 36 #else 37 int vmclear(vm) 38 Vmalloc_t* vm; 39 #endif 40 { 41 Seg_t *seg, *next; 42 Block_t *tp; 43 size_t size, s; 44 Vmdata_t *vd = vm->data; 45 46 SETLOCK(vm, 0); 47 48 vd->free = vd->wild = NIL(Block_t*); 49 vd->pool = 0; 50 51 if(vd->mode&(VM_MTBEST|VM_MTDEBUG|VM_MTPROFILE) ) 52 { vd->root = NIL(Block_t*); 53 for(s = 0; s < S_TINY; ++s) 54 TINY(vd)[s] = NIL(Block_t*); 55 for(s = 0; s <= S_CACHE; ++s) 56 CACHE(vd)[s] = NIL(Block_t*); 57 } 58 59 for(seg = vd->seg; seg; seg = next) 60 { next = seg->next; 61 62 tp = SEGBLOCK(seg); 63 size = seg->baddr - ((Vmuchar_t*)tp) - 2*sizeof(Head_t); 64 65 SEG(tp) = seg; 66 SIZE(tp) = size; 67 if((vd->mode&(VM_MTLAST|VM_MTPOOL)) ) 68 seg->free = tp; 69 else 70 { SIZE(tp) |= BUSY|JUNK; 71 LINK(tp) = CACHE(vd)[C_INDEX(SIZE(tp))]; 72 CACHE(vd)[C_INDEX(SIZE(tp))] = tp; 73 } 74 75 tp = BLOCK(seg->baddr); 76 SEG(tp) = seg; 77 SIZE(tp) = BUSY; 78 } 79 80 CLRLOCK(vm, 0); 81 82 return 0; 83 } 84 85 #endif 86