1 files changed, 104 insertions, 0 deletions
diff --git a/gfx/angle/src/compiler/translator/Cache.cpp b/gfx/angle/src/compiler/translator/Cache.cpp
new file mode 100755
index 000000000..094e3ff57
--- /dev/null
+++ b/gfx/angle/src/compiler/translator/Cache.cpp
@@ -0,0 +1,104 @@
+//
+// Copyright (c) 2015 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+// Cache.cpp: Implements a cache for various commonly created objects.
+
+#include <limits>
+
+#include "common/angleutils.h"
+#include "common/debug.h"
+#include "compiler/translator/Cache.h"
+
+namespace sh
+{
+
+namespace
+{
+
+class TScopedAllocator : angle::NonCopyable
+{
+  public:
+    TScopedAllocator(TPoolAllocator *allocator)
+        : mPreviousAllocator(GetGlobalPoolAllocator())
+    {
+        SetGlobalPoolAllocator(allocator);
+    }
+    ~TScopedAllocator()
+    {
+        SetGlobalPoolAllocator(mPreviousAllocator);
+    }
+
+  private:
+    TPoolAllocator *mPreviousAllocator;
+};
+
+}  // namespace
+
+TCache::TypeKey::TypeKey(TBasicType basicType,
+                         TPrecision precision,
+                         TQualifier qualifier,
+                         unsigned char primarySize,
+                         unsigned char secondarySize)
+{
+    static_assert(sizeof(components) <= sizeof(value),
+                  "TypeKey::value is too small");
+
+    const size_t MaxEnumValue = std::numeric_limits<EnumComponentType>::max();
+
+    // TODO: change to static_assert() once we deprecate MSVC 2013 support
+    ASSERT(MaxEnumValue >= EbtLast &&
+           MaxEnumValue >= EbpLast &&
+           MaxEnumValue >= EvqLast &&
+           "TypeKey::EnumComponentType is too small");
+
+    value = 0;
+    components.basicType = static_cast<EnumComponentType>(basicType);
+    components.precision = static_cast<EnumComponentType>(precision);
+    components.qualifier = static_cast<EnumComponentType>(qualifier);
+    components.primarySize = primarySize;
+    components.secondarySize = secondarySize;
+}
+
+TCache *TCache::sCache = nullptr;
+
+void TCache::initialize()
+{
+    if (sCache == nullptr)
+    {
+        sCache = new TCache();
+    }
+}
+
+void TCache::destroy()
+{
+    SafeDelete(sCache);
+}
+
+const TType *TCache::getType(TBasicType basicType,
+                             TPrecision precision,
+                             TQualifier qualifier,
+                             unsigned char primarySize,
+                             unsigned char secondarySize)
+{
+    TypeKey key(basicType, precision, qualifier,
+                primarySize, secondarySize);
+    auto it = sCache->mTypes.find(key);
+    if (it != sCache->mTypes.end())
+    {
+        return it->second;
+    }
+
+    TScopedAllocator scopedAllocator(&sCache->mAllocator);
+
+    TType *type = new TType(basicType, precision, qualifier,
+                            primarySize, secondarySize);
+    type->realize();
+    sCache->mTypes.insert(std::make_pair(key, type));
+
+    return type;
+}
+
+}  // namespace sh