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 // Copyright (c) 2008 The Chromium Authors. All rights reserved.

 // Use of this source code is governed by a BSD-style license that can be

 // found in the LICENSE file.

 #ifndef TESTING_MULTIPROCESS_FUNC_LIST_H_

 #define TESTING_MULTIPROCESS_FUNC_LIST_H_

 #include <string>

 // This file provides the plumbing to register functions to be executed

 // as the main function of a child process in a multi-process test.

 // This complements the MultiProcessTest class which provides facilities

 // for launching such tests.

 //

 // The MULTIPROCESS_TEST_MAIN() macro registers a string -> func_ptr mapping

 // by creating a new global instance of the AppendMultiProcessTest() class

 // this means that by the time that we reach our main() function the mapping

 // is already in place.

 //

 // Example usage:

 //  MULTIPROCESS_TEST_MAIN(a_test_func) {

 //    // Code here runs in a child process.

 //    return 0;

 //  }

 //

 // The prototype of a_test_func is implicitly

 //   int test_main_func_name();

 namespace multi_process_function_list {

 // Type for child process main functions.

 typedef int (*ChildFunctionPtr)();

 // Helper class to append a test function to the global mapping.

 // Used by the MULTIPROCESS_TEST_MAIN macro.

 class AppendMultiProcessTest {

  public:

   AppendMultiProcessTest(std::string test_name, ChildFunctionPtr func_ptr);

 };

 // Invoke the main function of a test previously registered with

 // MULTIPROCESS_TEST_MAIN()

 int InvokeChildProcessTest(std::string test_name);

 // This macro creates a global MultiProcessTest::AppendMultiProcessTest object

 // whose constructor does the work of adding the global mapping.

 #define MULTIPROCESS_TEST_MAIN(test_main) \

   int test_main(); \

   namespace { \

     multi_process_function_list::AppendMultiProcessTest \

     AddMultiProcessTest##_##test_main(#test_main, (test_main)); \

   } \

   int test_main()

 }  // namespace multi_process_function_list

 #endif  // TESTING_MULTIPROCESS_FUNC_LIST_H_