diff options
Diffstat (limited to 'usr/src/lib/libast/common/vmalloc/vmclear.c')
| -rw-r--r-- | usr/src/lib/libast/common/vmalloc/vmclear.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/usr/src/lib/libast/common/vmalloc/vmclear.c b/usr/src/lib/libast/common/vmalloc/vmclear.c new file mode 100644 index 0000000000..3aaee44694 --- /dev/null +++ b/usr/src/lib/libast/common/vmalloc/vmclear.c @@ -0,0 +1,89 @@ +/*********************************************************************** +* * +* This software is part of the ast package * +* Copyright (c) 1985-2007 AT&T Knowledge Ventures * +* and is licensed under the * +* Common Public License, Version 1.0 * +* by AT&T Knowledge Ventures * +* * +* A copy of the License is available at * +* http://www.opensource.org/licenses/cpl1.0.txt * +* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * +* * +* Information and Software Systems Research * +* AT&T Research * +* Florham Park NJ * +* * +* Glenn Fowler <gsf@research.att.com> * +* David Korn <dgk@research.att.com> * +* Phong Vo <kpv@research.att.com> * +* * +***********************************************************************/ +#if defined(_UWIN) && defined(_BLD_ast) + +void _STUB_vmclear(){} + +#else + +#include "vmhdr.h" + +/* Clear out all allocated space. +** +** Written by Kiem-Phong Vo, kpv@research.att.com, 01/16/94. +*/ +#if __STD_C +int vmclear(Vmalloc_t* vm) +#else +int vmclear(vm) +Vmalloc_t* vm; +#endif +{ + reg Seg_t* seg; + reg Seg_t* next; + reg Block_t* tp; + reg size_t size, s; + reg Vmdata_t* vd = vm->data; + + if(!(vd->mode&VM_TRUST) ) + { if(ISLOCK(vd,0)) + return -1; + SETLOCK(vd,0); + } + + vd->free = vd->wild = NIL(Block_t*); + vd->pool = 0; + + if(vd->mode&(VM_MTBEST|VM_MTDEBUG|VM_MTPROFILE) ) + { vd->root = NIL(Block_t*); + for(s = 0; s < S_TINY; ++s) + TINY(vd)[s] = NIL(Block_t*); + for(s = 0; s <= S_CACHE; ++s) + CACHE(vd)[s] = NIL(Block_t*); + } + + for(seg = vd->seg; seg; seg = next) + { next = seg->next; + + tp = SEGBLOCK(seg); + size = seg->baddr - ((Vmuchar_t*)tp) - 2*sizeof(Head_t); + + SEG(tp) = seg; + SIZE(tp) = size; + if((vd->mode&(VM_MTLAST|VM_MTPOOL)) ) + seg->free = tp; + else + { SIZE(tp) |= BUSY|JUNK; + LINK(tp) = CACHE(vd)[C_INDEX(SIZE(tp))]; + CACHE(vd)[C_INDEX(SIZE(tp))] = tp; + } + + tp = BLOCK(seg->baddr); + SEG(tp) = seg; + SIZE(tp) = BUSY; + } + + CLRLOCK(vd,0); + return 0; +} + +#endif |