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protect local variables in red-black tree implementation from GC

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This commit is contained in:
Joel Dice 2007-11-27 08:46:31 -07:00
parent 466c958d2b
commit 6ac124f2fb
1 changed files with 17 additions and 4 deletions
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21
src/util.cpp
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@ -19,13 +19,21 @@ clone(Thread* t, object o)
} }
object object
treeFind(Thread* t, object oldRoot, object node, object sentinal) treeFind(Thread* t, object old, object node, object sentinal)
{ {
object newRoot = clone(t, oldRoot); PROTECT(t, old);
object ancestors = 0; PROTECT(t, node);
PROTECT(t, sentinal);
object newRoot = clone(t, old);
PROTECT(t, newRoot);
object old = oldRoot;
object new_ = newRoot; object new_ = newRoot;
PROTECT(t, new_);
object ancestors = 0;
PROTECT(t, ancestors);
while (old != sentinal) { while (old != sentinal) {
ancestors = makePair(t, new_, ancestors); ancestors = makePair(t, new_, ancestors);
@ -82,8 +90,13 @@ object
treeAdd(Thread* t, object path) treeAdd(Thread* t, object path)
{ {
object new_ = treePathNode(t, path); object new_ = treePathNode(t, path);
PROTECT(t, new_);
object newRoot = treePathRoot(t, path); object newRoot = treePathRoot(t, path);
PROTECT(t, newRoot);
object ancestors = treePathAncestors(t, path); object ancestors = treePathAncestors(t, path);
PROTECT(t, ancestors);
// rebalance // rebalance
treeNodeRed(t, new_) = true; treeNodeRed(t, new_) = true;