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comparison: media/webrtc/trunk/testing/multiprocess_func_list.h
media/webrtc/trunk/testing/multiprocess_func_list.h
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| 1 // Copyright (c) 2008 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef TESTING_MULTIPROCESS_FUNC_LIST_H_ | |
| 6 #define TESTING_MULTIPROCESS_FUNC_LIST_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 | |
| 10 // This file provides the plumbing to register functions to be executed | |
| 11 // as the main function of a child process in a multi-process test. | |
| 12 // This complements the MultiProcessTest class which provides facilities | |
| 13 // for launching such tests. | |
| 14 // | |
| 15 // The MULTIPROCESS_TEST_MAIN() macro registers a string -> func_ptr mapping | |
| 16 // by creating a new global instance of the AppendMultiProcessTest() class | |
| 17 // this means that by the time that we reach our main() function the mapping | |
| 18 // is already in place. | |
| 19 // | |
| 20 // Example usage: | |
| 21 // MULTIPROCESS_TEST_MAIN(a_test_func) { | |
| 22 // // Code here runs in a child process. | |
| 23 // return 0; | |
| 24 // } | |
| 25 // | |
| 26 // The prototype of a_test_func is implicitly | |
| 27 // int test_main_func_name(); | |
| 28 | |
| 29 namespace multi_process_function_list { | |
| 30 | |
| 31 // Type for child process main functions. | |
| 32 typedef int (*ChildFunctionPtr)(); | |
| 33 | |
| 34 // Helper class to append a test function to the global mapping. | |
| 35 // Used by the MULTIPROCESS_TEST_MAIN macro. | |
| 36 class AppendMultiProcessTest { | |
| 37 public: | |
| 38 AppendMultiProcessTest(std::string test_name, ChildFunctionPtr func_ptr); | |
| 39 }; | |
| 40 | |
| 41 // Invoke the main function of a test previously registered with | |
| 42 // MULTIPROCESS_TEST_MAIN() | |
| 43 int InvokeChildProcessTest(std::string test_name); | |
| 44 | |
| 45 // This macro creates a global MultiProcessTest::AppendMultiProcessTest object | |
| 46 // whose constructor does the work of adding the global mapping. | |
| 47 #define MULTIPROCESS_TEST_MAIN(test_main) \ | |
| 48 int test_main(); \ | |
| 49 namespace { \ | |
| 50 multi_process_function_list::AppendMultiProcessTest \ | |
| 51 AddMultiProcessTest##_##test_main(#test_main, (test_main)); \ | |
| 52 } \ | |
| 53 int test_main() | |
| 54 | |
| 55 } // namespace multi_process_function_list | |
| 56 | |
| 57 #endif // TESTING_MULTIPROCESS_FUNC_LIST_H_ |
