upload android base code part3

android/art/runtime/class_table-inl.h

@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_RUNTIME_CLASS_TABLE_INL_H_
+#define ART_RUNTIME_CLASS_TABLE_INL_H_
+
+#include "class_table.h"
+
+#include "gc_root-inl.h"
+#include "oat_file.h"
+
+namespace art {
+
+template<class Visitor>
+void ClassTable::VisitRoots(Visitor& visitor) {
+  ReaderMutexLock mu(Thread::Current(), lock_);
+  for (ClassSet& class_set : classes_) {
+    for (TableSlot& table_slot : class_set) {
+      table_slot.VisitRoot(visitor);
+    }
+  }
+  for (GcRoot<mirror::Object>& root : strong_roots_) {
+    visitor.VisitRoot(root.AddressWithoutBarrier());
+  }
+  for (const OatFile* oat_file : oat_files_) {
+    for (GcRoot<mirror::Object>& root : oat_file->GetBssGcRoots()) {
+      visitor.VisitRootIfNonNull(root.AddressWithoutBarrier());
+    }
+  }
+}
+
+template<class Visitor>
+void ClassTable::VisitRoots(const Visitor& visitor) {
+  ReaderMutexLock mu(Thread::Current(), lock_);
+  for (ClassSet& class_set : classes_) {
+    for (TableSlot& table_slot : class_set) {
+      table_slot.VisitRoot(visitor);
+    }
+  }
+  for (GcRoot<mirror::Object>& root : strong_roots_) {
+    visitor.VisitRoot(root.AddressWithoutBarrier());
+  }
+  for (const OatFile* oat_file : oat_files_) {
+    for (GcRoot<mirror::Object>& root : oat_file->GetBssGcRoots()) {
+      visitor.VisitRootIfNonNull(root.AddressWithoutBarrier());
+    }
+  }
+}
+
+template <typename Visitor>
+bool ClassTable::Visit(Visitor& visitor) {
+  ReaderMutexLock mu(Thread::Current(), lock_);
+  for (ClassSet& class_set : classes_) {
+    for (TableSlot& table_slot : class_set) {
+      if (!visitor(table_slot.Read())) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+template <typename Visitor>
+bool ClassTable::Visit(const Visitor& visitor) {
+  ReaderMutexLock mu(Thread::Current(), lock_);
+  for (ClassSet& class_set : classes_) {
+    for (TableSlot& table_slot : class_set) {
+      if (!visitor(table_slot.Read())) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+template<ReadBarrierOption kReadBarrierOption>
+inline mirror::Class* ClassTable::TableSlot::Read() const {
+  const uint32_t before = data_.LoadRelaxed();
+  ObjPtr<mirror::Class> const before_ptr(ExtractPtr(before));
+  ObjPtr<mirror::Class> const after_ptr(
+      GcRoot<mirror::Class>(before_ptr).Read<kReadBarrierOption>());
+  if (kReadBarrierOption != kWithoutReadBarrier && before_ptr != after_ptr) {
+    // If another thread raced and updated the reference, do not store the read barrier updated
+    // one.
+    data_.CompareExchangeStrongRelease(before, Encode(after_ptr, MaskHash(before)));
+  }
+  return after_ptr.Ptr();
+}
+
+template<typename Visitor>
+inline void ClassTable::TableSlot::VisitRoot(const Visitor& visitor) const {
+  const uint32_t before = data_.LoadRelaxed();
+  ObjPtr<mirror::Class> before_ptr(ExtractPtr(before));
+  GcRoot<mirror::Class> root(before_ptr);
+  visitor.VisitRoot(root.AddressWithoutBarrier());
+  ObjPtr<mirror::Class> after_ptr(root.Read<kWithoutReadBarrier>());
+  if (before_ptr != after_ptr) {
+    // If another thread raced and updated the reference, do not store the read barrier updated
+    // one.
+    data_.CompareExchangeStrongRelease(before, Encode(after_ptr, MaskHash(before)));
+  }
+}
+
+inline ObjPtr<mirror::Class> ClassTable::TableSlot::ExtractPtr(uint32_t data) {
+  return reinterpret_cast<mirror::Class*>(data & ~kHashMask);
+}
+
+inline uint32_t ClassTable::TableSlot::Encode(ObjPtr<mirror::Class> klass, uint32_t hash_bits) {
+  DCHECK_LE(hash_bits, kHashMask);
+  return reinterpret_cast<uintptr_t>(klass.Ptr()) | hash_bits;
+}
+
+inline ClassTable::TableSlot::TableSlot(ObjPtr<mirror::Class> klass, uint32_t descriptor_hash)
+    : data_(Encode(klass, MaskHash(descriptor_hash))) {
+  if (kIsDebugBuild) {
+    std::string temp;
+    const uint32_t hash = ComputeModifiedUtf8Hash(klass->GetDescriptor(&temp));
+    CHECK_EQ(descriptor_hash, hash);
+  }
+}
+
+template <typename Filter>
+inline void ClassTable::RemoveStrongRoots(const Filter& filter) {
+  WriterMutexLock mu(Thread::Current(), lock_);
+  strong_roots_.erase(std::remove_if(strong_roots_.begin(), strong_roots_.end(), filter),
+                      strong_roots_.end());
+}
+
+}  // namespace art
+
+#endif  // ART_RUNTIME_CLASS_TABLE_INL_H_