chore: import upstream snapshot with attribution

paddle/phi/kernels/funcs/jit/kernel_pool.cc

@@ -0,0 +1,39 @@
+/* Copyright (c) 2023 PaddlePaddle Authors. All Rights Reserved.
+ *
+ * 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. */
+
+#include "paddle/phi/kernels/funcs/jit/kernel_pool.h"
+
+namespace phi::jit {
+
+std::map<size_t, std::shared_ptr<void>>& GetJITCodesMap() {
+  static thread_local std::map<size_t, std::shared_ptr<void>> g_jit_codes_map;
+  return g_jit_codes_map;
+}
+
+JitCodeCreatorPool& JitCodeCreatorPool::Instance() {
+  static JitCodeCreatorPool g_creator_pool;
+  return g_creator_pool;
+}
+
+KernelPool& KernelPool::Instance() {
+  static KernelPool g_kernel_pool;
+  return g_kernel_pool;
+}
+
+ReferKernelPool& ReferKernelPool::Instance() {
+  static ReferKernelPool g_refer_kernel_pool;
+  return g_refer_kernel_pool;
+}
+
+}  // namespace phi::jit