webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 71 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/wasm/WasmMemoryInformation.h b/Source/JavaScriptCore/wasm/WasmMemoryInformation.h
new file mode 100644
index 000000000..6e7f52189
--- /dev/null
+++ b/Source/JavaScriptCore/wasm/WasmMemoryInformation.h
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#pragma once
+
+#if ENABLE(WEBASSEMBLY)
+
+#include "GPRInfo.h"
+#include "WasmPageCount.h"
+#include <wtf/Vector.h>
+
+namespace JSC { namespace Wasm {
+
+struct PinnedSizeRegisterInfo {
+    GPRReg sizeRegister;
+    unsigned sizeOffset;
+};
+
+struct PinnedRegisterInfo {
+    Vector<PinnedSizeRegisterInfo> sizeRegisters;
+    GPRReg baseMemoryPointer;
+    static const PinnedRegisterInfo& get();
+    PinnedRegisterInfo(Vector<PinnedSizeRegisterInfo>&&, GPRReg);
+};
+
+class MemoryInformation {
+public:
+    MemoryInformation()
+    {
+        ASSERT(!*this);
+    }
+
+    MemoryInformation(PageCount initial, PageCount maximum, bool isImport);
+
+    PageCount initial() const { return m_initial; }
+    PageCount maximum() const { return m_maximum; }
+    bool isImport() const { return m_isImport; }
+
+    explicit operator bool() const { return !!m_initial; }
+
+private:
+    PageCount m_initial { };
+    PageCount m_maximum { };
+    bool m_isImport { false };
+};
+
+} } // namespace JSC::Wasm
+
+#endif // ENABLE(WASM)