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authorIgor Pashev <pashev.igor@gmail.com>2012-06-24 22:28:35 +0000
committerIgor Pashev <pashev.igor@gmail.com>2012-06-24 22:28:35 +0000
commit3950ffe2a485479f6561c27364d3d7df5a21d124 (patch)
tree468c6e14449d1b1e279222ec32f676b0311917d2 /src/lib/libast/vmalloc/vmclear.c
downloadksh-upstream.tar.gz
Imported Upstream version 93u+upstream
Diffstat (limited to 'src/lib/libast/vmalloc/vmclear.c')
-rw-r--r--src/lib/libast/vmalloc/vmclear.c85
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