Imported Upstream version 93u+upstream

1 files changed, 85 insertions, 0 deletions

diff --git a/src/lib/libast/vmalloc/vmclear.c b/src/lib/libast/vmalloc/vmclear.c
new file mode 100644
index 0000000..c4b8107
--- /dev/null
+++ b/src/lib/libast/vmalloc/vmclear.c
@@ -0,0 +1,85 @@
+/***********************************************************************
+*                                                                      *
+*               This software is part of the ast package               *
+*          Copyright (c) 1985-2011 AT&T Intellectual Property          *
+*                      and is licensed under the                       *
+*                 Eclipse Public License, Version 1.0                  *
+*                    by AT&T Intellectual Property                     *
+*                                                                      *
+*                A copy of the License is available at                 *
+*          http://www.eclipse.org/org/documents/epl-v10.html           *
+*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *
+*                                                                      *
+*              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
+{
+	Seg_t		*seg, *next;
+	Block_t		*tp;
+	size_t		size, s;
+	Vmdata_t	*vd = vm->data;
+
+	SETLOCK(vm, 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(vm, 0);
+
+	return 0;
+}
+
+#endif