move classes out of native_loader.cpp

native_loader.cpp is too crowded. Move the classes
NativeLoaderNamespaces and LibraryNamespaces out of native_loader.cpp to
their own source files.

This change does not alter any functionality.

Bug: 130388701
Test: m, presubmit tests
Change-Id: Ibc61ec0dc6727af7cac865b1971ebf1befac6855
diff --git a/libnativeloader/library_namespaces.h b/libnativeloader/library_namespaces.h
new file mode 100644
index 0000000..353b5fc
--- /dev/null
+++ b/libnativeloader/library_namespaces.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+#pragma once
+#if !defined(__ANDROID__)
+#error "Not available for host"
+#endif
+
+#include "native_loader_namespace.h"
+
+#include <list>
+#include <string>
+
+#include "jni.h"
+
+namespace android {
+
+// LibraryNamespaces is a singleton object that manages NativeLoaderNamespace
+// objects for an app process. Its main job is to create (and configure) a new
+// NativeLoaderNamespace object for a Java ClassLoader, and to find an existing
+// object for a given ClassLoader.
+class LibraryNamespaces {
+ public:
+  LibraryNamespaces() : initialized_(false) {}
+
+  LibraryNamespaces(LibraryNamespaces&&) = default;
+  LibraryNamespaces(const LibraryNamespaces&) = delete;
+  LibraryNamespaces& operator=(const LibraryNamespaces&) = delete;
+
+  void Initialize();
+  void Reset() { namespaces_.clear(); }
+  NativeLoaderNamespace* Create(JNIEnv* env, uint32_t target_sdk_version, jobject class_loader,
+                                bool is_shared, jstring dex_path, jstring java_library_path,
+                                jstring java_permitted_path, std::string* error_msg);
+  NativeLoaderNamespace* FindNamespaceByClassLoader(JNIEnv* env, jobject class_loader);
+
+ private:
+  bool InitPublicNamespace(const char* library_path, std::string* error_msg);
+  NativeLoaderNamespace* FindParentNamespaceByClassLoader(JNIEnv* env, jobject class_loader);
+
+  bool initialized_;
+  std::list<std::pair<jweak, NativeLoaderNamespace>> namespaces_;
+  std::string system_public_libraries_;
+  std::string runtime_public_libraries_;
+  std::string vendor_public_libraries_;
+  std::string oem_public_libraries_;
+  std::string product_public_libraries_;
+  std::string system_llndk_libraries_;
+  std::string system_vndksp_libraries_;
+};
+
+}  // namespace android