webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 66 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/JSStringSubspace.cpp b/Source/JavaScriptCore/runtime/JSStringSubspace.cpp
new file mode 100644
index 000000000..40130c492
--- /dev/null
+++ b/Source/JavaScriptCore/runtime/JSStringSubspace.cpp
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2017 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. ``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
+ * 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 "JSStringSubspace.h"
+
+#include "MarkedBlockInlines.h"
+#include "JSCInlines.h"
+#include "SubspaceInlines.h"
+
+namespace JSC {
+
+namespace {
+
+struct DestroyFunc {
+    ALWAYS_INLINE void operator()(VM&, JSCell* cell) const
+    {
+        static_cast<JSString*>(cell)->JSString::~JSString();
+    }
+};
+
+} // anonymous namespace
+
+JSStringSubspace::JSStringSubspace(CString name, Heap& heap)
+    : Subspace(name, heap, AllocatorAttributes(NeedsDestruction, HeapCell::JSCell))
+{
+}
+
+JSStringSubspace::~JSStringSubspace()
+{
+}
+
+FreeList JSStringSubspace::finishSweep(MarkedBlock::Handle& handle, MarkedBlock::Handle::SweepMode sweepMode)
+{
+    return handle.finishSweepKnowingSubspace(sweepMode, DestroyFunc());
+}
+
+void JSStringSubspace::destroy(VM& vm, JSCell* cell)
+{
+    DestroyFunc()(vm, cell);
+}
+
+} // namespace JSC
+