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Diffstat (limited to 'tests/Reader_Writer_Test.cpp')
| -rw-r--r-- | tests/Reader_Writer_Test.cpp | 287 |
1 files changed, 0 insertions, 287 deletions
diff --git a/tests/Reader_Writer_Test.cpp b/tests/Reader_Writer_Test.cpp deleted file mode 100644 index 8004972f6cb..00000000000 --- a/tests/Reader_Writer_Test.cpp +++ /dev/null @@ -1,287 +0,0 @@ -// $Id$ - -// ============================================================================ -// -// = LIBRARY -// tests -// -// = FILENAME -// Reader_Writer_Test.cpp -// -// = DESCRIPTION -// This test program verifies the functionality of the ACE_OS -// implementation of readers/writer locks on Win32 and Posix -// pthreads. -// -// = AUTHOR -// Prashant Jain and Doug C. Schmidt -// -// ============================================================================ - -#include "test_config.h" -#include "ace/Synch.h" -#include "ace/Thread.h" -#include "ace/Thread_Manager.h" -#include "ace/Get_Opt.h" - -ACE_RCSID(tests, Reader_Writer_Test, "$Id$") - -#if defined(__BORLANDC__) && __BORLANDC__ >= 0x0530 -USELIB("..\ace\aced.lib"); -//--------------------------------------------------------------------------- -#endif /* defined(__BORLANDC__) && __BORLANDC__ >= 0x0530 */ - -#if defined (ACE_HAS_THREADS) - -// Default number of iterations. -#if defined (ACE_HAS_WINCE) -static size_t n_iterations = 50; -#else -static size_t n_iterations = 50; -#endif /* ACE_HAS_WINCE */ - -// Default number of loops. -static size_t n_loops = 100; - -// Default number of readers. -static size_t n_readers = 6; - -// Default number of writers. -static size_t n_writers = 4; - -// Thread id of last writer. -static ACE_thread_t shared_data; - -// Lock for shared_data. -static ACE_RW_Thread_Mutex rw_mutex; - -// Count of the number of readers and writers. -static ACE_Atomic_Op<ACE_Thread_Mutex, int> current_readers; -static ACE_Atomic_Op<ACE_Thread_Mutex, int> current_writers; - -// Explain usage and exit. -static void -print_usage_and_die (void) -{ - ACE_DEBUG ((LM_DEBUG, - ASYS_TEXT ("usage: %n [-r n_readers] [-w n_writers] [-n iteration_count]\n"))); - ACE_OS::exit (1); -} - -static void -parse_args (int argc, ASYS_TCHAR *argv[]) -{ - ACE_Get_Opt get_opt (argc, argv, ASYS_TEXT ("r:w:n:")); - - int c; - - while ((c = get_opt ()) != -1) - switch (c) - { - case 'r': - n_readers = ACE_OS::atoi (get_opt.optarg); - break; - case 'w': - n_writers = ACE_OS::atoi (get_opt.optarg); - break; - case 'n': - n_iterations = ACE_OS::atoi (get_opt.optarg); - break; - default: - print_usage_and_die (); - break; - } -} - -// Iterate <n_iterations> each time checking that nobody modifies the data -// while we have a read lock. - -static void * -reader (void *) -{ - ACE_DEBUG ((LM_DEBUG, ASYS_TEXT (" (%t) reader starting\n"))); - - // We use a random pause, around 2msec with 1msec jittering. - int usecs = 1000 + ACE_OS::rand() % 2000; - ACE_Time_Value pause(0, usecs); - - for (size_t iterations = 1; iterations <= n_iterations; iterations++) - { - ACE_OS::sleep(pause); - ACE_Read_Guard<ACE_RW_Thread_Mutex> g (rw_mutex); - // int n = ++current_readers; - // ACE_DEBUG ((LM_DEBUG, ASYS_TEXT (" (%t) I'm reader number %d\n"), n)); - - if (current_writers > 0) - ACE_DEBUG ((LM_DEBUG, ASYS_TEXT (" (%t) writers found!!!\n"))); - - ACE_thread_t data = shared_data; - - for (size_t loop = 1; loop <= n_loops; loop++) - { - ACE_Thread::yield (); - - if (!ACE_OS::thr_equal (shared_data, data)) - ACE_DEBUG ((LM_DEBUG, - ASYS_TEXT (" (%t) somebody changed %d to %d\n"), - data, shared_data)); - } - - int result = rw_mutex.tryacquire_write_upgrade (); - - if (result == 0) - { - current_readers--; - current_writers++; - - ACE_DEBUG ((LM_DEBUG, - ASYS_TEXT ("(%t) upgraded to write lock!\n"))); - - ACE_thread_t self = ACE_Thread::self (); - - shared_data = self; - data = self; - - for (size_t loop = 1; loop <= n_loops; loop++) - { - if (ACE_OS::thr_equal (shared_data, data) == 0) - ACE_DEBUG ((LM_DEBUG, - ASYS_TEXT ("(%t) upgraded writer error: somebody changed %d to %d\n"), - data, - shared_data)); - } - - current_writers--; - // we were a writer - } - else if (result == -1 && errno == EBUSY) - { - current_readers--; - // we were still a reader - - ACE_DEBUG ((LM_DEBUG, - ASYS_TEXT ("(%t) could not upgrade to write lock!\n"))); - - } - else // result == -1 - { - ACE_ERROR ((LM_ERROR, - ASYS_TEXT ("(%t) failure in upgrading to write lock!\n"), - 1)); - } - //ACE_DEBUG ((LM_DEBUG, ASYS_TEXT (" (%t) done with reading guarded data\n"))); - - ACE_DEBUG ((LM_DEBUG, - ASYS_TEXT ("(%t) reader finished %d iterations at %T\n"), - iterations)); - } - return 0; -} - -// Iterate <n_iterations> each time modifying the global data -// and checking that nobody steps on it while we can write it. - -static void * -writer (void *) -{ - ACE_DEBUG ((LM_DEBUG, ASYS_TEXT (" (%t) writer starting\n"))); - - // We use a random pause, around 2msec with 1msec jittering. - int usecs = 1000 + ACE_OS::rand() % 2000; - ACE_Time_Value pause(0, usecs); - - for (size_t iterations = 1; iterations <= n_iterations; iterations++) - { - ACE_OS::sleep(pause); - - ACE_Write_Guard<ACE_RW_Thread_Mutex> g (rw_mutex); - - current_writers++; - - if (current_writers > 1) - ACE_DEBUG ((LM_DEBUG, - ASYS_TEXT (" (%t) other writers found!!!\n"))); - - if (current_readers > 0) - ACE_DEBUG ((LM_DEBUG, - ASYS_TEXT (" (%t) readers found!!!\n"))); - - ACE_thread_t self = ACE_Thread::self (); - - shared_data = self; - - for (size_t loop = 1; loop <= n_loops; loop++) - { - ACE_Thread::yield (); - - if (!ACE_OS::thr_equal (shared_data, self)) - ACE_DEBUG ((LM_DEBUG, - ASYS_TEXT (" (%t) somebody wrote on my data %d\n"), - shared_data)); - } - - current_writers--; - - ACE_DEBUG((LM_DEBUG, ASYS_TEXT (" (%t) write %d done at %T\n"), iterations)); - } - return 0; -} - - -#if defined (ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION) -template class ACE_Atomic_Op<ACE_Thread_Mutex, int>; -template class ACE_Read_Guard<ACE_RW_Mutex>; -template class ACE_Write_Guard<ACE_RW_Mutex>; -template class ACE_Guard<ACE_RW_Mutex>; -#elif defined (ACE_HAS_TEMPLATE_INSTANTIATION_PRAGMA) -#pragma instantiate ACE_Atomic_Op<ACE_Thread_Mutex, int> -#pragma instantiate ACE_Read_Guard<ACE_RW_Mutex> -#pragma instantiate ACE_Write_Guard<ACE_RW_Mutex> -#pragma instantiate ACE_Guard<ACE_RW_Mutex> -#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION */ - -#endif /* ACE_HAS_THREADS */ - -// Spawn off threads. - -int main (int argc, ASYS_TCHAR *argv[]) -{ - ACE_START_TEST (ASYS_TEXT ("Reader_Writer_Test")); - -#if defined (ACE_HAS_THREADS) - parse_args (argc, argv); - - current_readers = 0; // Possibly already done - current_writers = 0; // Possibly already done - - ACE_DEBUG ((LM_DEBUG, - ASYS_TEXT (" (%t) main thread starting\n"))); - - if (ACE_Thread_Manager::instance ()->spawn_n (n_readers, - ACE_THR_FUNC (reader), - 0, - THR_NEW_LWP) == -1) - ACE_ERROR_RETURN ((LM_ERROR, - ASYS_TEXT ("%p\n"), - ASYS_TEXT ("spawn_n")), 1); - else if (ACE_Thread_Manager::instance ()->spawn_n (n_writers, - ACE_THR_FUNC (writer), - 0, - THR_NEW_LWP) == -1) - ACE_ERROR_RETURN ((LM_ERROR, - ASYS_TEXT ("%p\n"), - ASYS_TEXT ("spawn_n")), 1); - - ACE_Thread_Manager::instance ()->wait (); - - ACE_DEBUG ((LM_DEBUG, - ASYS_TEXT (" (%t) exiting main thread\n"))); -#else - ACE_UNUSED_ARG (argc); - ACE_UNUSED_ARG (argv); - ACE_ERROR ((LM_INFO, - ASYS_TEXT ("threads not supported on this platform\n"))); -#endif /* ACE_HAS_THREADS */ - ACE_END_TEST; - return 0; -} |