chore: import upstream snapshot with attribution

python/tvm/testing/popen_pool.py

@@ -0,0 +1,81 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+# pylint: disable=invalid-name, missing-function-docstring
+"""Helper functions for popen_pool test cases.
+
+These functions run inside PopenWorker subprocesses and must live in an
+importable module (cloudpickle resolves them by module + qualname).  The
+previous version used FFI helpers (testing.sleep_in_ffi, testing.identity_cpp,
+etc.) that were removed with ffi_testing.cc.  This version is pure-Python and
+uses time.sleep for any blocking needed by the timeout test.
+"""
+
+import time
+
+import tvm_ffi
+
+TEST_GLOBAL_STATE_1 = 0
+TEST_GLOBAL_STATE_2 = 0
+TEST_GLOBAL_STATE_3 = 0
+
+
+def initializer(test_global_state_1, test_global_state_2, test_global_state_3):
+    global TEST_GLOBAL_STATE_1, TEST_GLOBAL_STATE_2, TEST_GLOBAL_STATE_3
+    TEST_GLOBAL_STATE_1 = test_global_state_1
+    TEST_GLOBAL_STATE_2 = test_global_state_2
+    TEST_GLOBAL_STATE_3 = test_global_state_3
+
+
+def after_initializer():
+    global TEST_GLOBAL_STATE_1, TEST_GLOBAL_STATE_2, TEST_GLOBAL_STATE_3
+    return TEST_GLOBAL_STATE_1, TEST_GLOBAL_STATE_2, TEST_GLOBAL_STATE_3
+
+
+@tvm_ffi.register_global_func("testing.identity_py", override=True)
+def identity_py(arg):
+    return arg
+
+
+def register_ffi():
+    @tvm_ffi.register_global_func("testing.nested_identity_py", override=True)
+    def _identity_py(arg):  # pylint: disable=unused-variable
+        return arg
+
+
+def call_py_ffi(arg):
+    _identity_py = tvm_ffi.get_global_func("testing.nested_identity_py")
+    return _identity_py(arg)
+
+
+def call_cpp_ffi(arg):
+    import tvm  # pylint: disable=import-outside-toplevel
+
+    return tvm.testing.echo(arg)
+
+
+def call_cpp_py_ffi(arg):
+    # Call the Python-registered identity function through the FFI registry,
+    # exercising the same cross-language dispatch path that identity_cpp covered.
+    _identity = tvm_ffi.get_global_func("testing.identity_py")
+    return _identity(arg)
+
+
+def timeout_job(seconds):
+    # Previously called testing.sleep_in_ffi (C++ FFI helper, now removed).
+    # Plain time.sleep is sufficient — the PopenPoolExecutor timeout mechanism
+    # watches wall-clock time and terminates the process just the same.
+    time.sleep(seconds)