JavaScriptCore-1097.3.tar.gz

[apple/javascriptcore.git] / heap / HandleHeap.cpp

diff --git a/heap/HandleHeap.cpp b/heap/HandleHeap.cpp
deleted file mode 100644 (file)
index 9b05db2..0000000
--- a/heap/HandleHeap.cpp
+++ /dev/null
@@ -1,174 +0,0 @@
-/*
- * Copyright (C) 2011 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
- * THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "HandleHeap.h"
-
-#include "JSObject.h"
-
-namespace JSC {
-
-WeakHandleOwner::~WeakHandleOwner()
-{
-}
-
-bool WeakHandleOwner::isReachableFromOpaqueRoots(Handle<Unknown>, void*, SlotVisitor&)
-{
-    return false;
-}
-
-void WeakHandleOwner::finalize(Handle<Unknown>, void*)
-{
-}
-
-HandleHeap::HandleHeap(JSGlobalData* globalData)
-    : m_globalData(globalData)
-    , m_nextToFinalize(0)
-{
-    grow();
-}
-
-void HandleHeap::grow()
-{
-    Node* block = m_blockStack.grow();
-    for (int i = m_blockStack.blockLength - 1; i >= 0; --i) {
-        Node* node = &block[i];
-        new (node) Node(this);
-        m_freeList.push(node);
-    }
-}
-
-void HandleHeap::markStrongHandles(HeapRootVisitor& heapRootMarker)
-{
-    Node* end = m_strongList.end();
-    for (Node* node = m_strongList.begin(); node != end; node = node->next())
-        heapRootMarker.mark(node->slot());
-}
-
-void HandleHeap::markWeakHandles(HeapRootVisitor& heapRootVisitor)
-{
-    SlotVisitor& visitor = heapRootVisitor.visitor();
-
-    Node* end = m_weakList.end();
-    for (Node* node = m_weakList.begin(); node != end; node = node->next()) {
-        ASSERT(isValidWeakNode(node));
-        JSCell* cell = node->slot()->asCell();
-        if (Heap::isMarked(cell))
-            continue;
-
-        WeakHandleOwner* weakOwner = node->weakOwner();
-        if (!weakOwner)
-            continue;
-
-        if (!weakOwner->isReachableFromOpaqueRoots(Handle<Unknown>::wrapSlot(node->slot()), node->weakOwnerContext(), visitor))
-            continue;
-
-        heapRootVisitor.mark(node->slot());
-    }
-}
-
-void HandleHeap::finalizeWeakHandles()
-{
-    Node* end = m_weakList.end();
-    for (Node* node = m_weakList.begin(); node != end; node = m_nextToFinalize) {
-        m_nextToFinalize = node->next();
-
-        ASSERT(isValidWeakNode(node));
-        JSCell* cell = node->slot()->asCell();
-        if (Heap::isMarked(cell))
-            continue;
-
-        if (WeakHandleOwner* weakOwner = node->weakOwner()) {
-            weakOwner->finalize(Handle<Unknown>::wrapSlot(node->slot()), node->weakOwnerContext());
-            if (m_nextToFinalize != node->next()) // Owner deallocated node.
-                continue;
-        }
-
-        *node->slot() = JSValue();
-        SentinelLinkedList<Node>::remove(node);
-        m_immediateList.push(node);
-    }
-    
-    m_nextToFinalize = 0;
-}
-
-void HandleHeap::writeBarrier(HandleSlot slot, const JSValue& value)
-{
-    ASSERT(!m_nextToFinalize); // Forbid assignment to handles during the finalization phase, since it would violate many GC invariants.
-
-    if (!value == !*slot && slot->isCell() == value.isCell())
-        return;
-
-    Node* node = toNode(slot);
-    SentinelLinkedList<Node>::remove(node);
-    if (!value || !value.isCell()) {
-        m_immediateList.push(node);
-        return;
-    }
-
-    if (node->isWeak()) {
-        m_weakList.push(node);
-        return;
-    }
-
-    m_strongList.push(node);
-}
-
-unsigned HandleHeap::protectedGlobalObjectCount()
-{
-    unsigned count = 0;
-    Node* end = m_strongList.end();
-    for (Node* node = m_strongList.begin(); node != end; node = node->next()) {
-        JSValue value = *node->slot();
-        if (value.isObject() && asObject(value.asCell())->isGlobalObject())
-            count++;
-    }
-    return count;
-}
-
-#if !ASSERT_DISABLED
-bool HandleHeap::isValidWeakNode(Node* node)
-{
-    if (!node->isWeak())
-        return false;
-
-    JSValue value = *node->slot();
-    if (!value || !value.isCell())
-        return false;
-
-    JSCell* cell = value.asCell();
-    if (!cell || !cell->structure())
-        return false;
-
-#if ENABLE(JSC_ZOMBIES)
-    if (cell->isZombie())
-        return false;
-#endif
-
-    return true;
-}
-#endif
-
-} // namespace JSC