blob: 6ba84954feec0ef31ba6d767e062ae92c4bb2f5f [file] [log] [blame]
// 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.
#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 {
AppendMultiProcessTest(std::string test_name, ChildFunctionPtr func_ptr);
// Invoke the main function of a test previously registered with
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