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Diffstat (limited to 'examples/ASX/Message_Queue/bounded_buffer.cpp')
-rw-r--r-- | examples/ASX/Message_Queue/bounded_buffer.cpp | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/examples/ASX/Message_Queue/bounded_buffer.cpp b/examples/ASX/Message_Queue/bounded_buffer.cpp deleted file mode 100644 index e0ea691d433..00000000000 --- a/examples/ASX/Message_Queue/bounded_buffer.cpp +++ /dev/null @@ -1,123 +0,0 @@ -// $Id$ - -// This short program copies stdin to stdout via the use of an ASX -// Message_Queue. It illustrates an implementation of the classic -// "bounded buffer" program. - -#include "ace/Message_Queue.h" -#include "ace/Thread_Manager.h" - -#if defined (ACE_HAS_THREADS) - -// Global thread manager. -static ACE_Thread_Manager thr_mgr; - -// The producer reads data from the stdin stream, creates a message, -// and then queues the message in the message list, where it is -// removed by the consumer thread. A 0-sized message is enqueued when -// there is no more data to read. The consumer uses this as a flag to -// know when to exit. - -static void * -producer (ACE_Message_Queue<ACE_MT_SYNCH> *msg_queue) -{ - // Keep reading stdin, until we reach EOF. - - for (int n; ; ) - { - // Allocate a new message. - ACE_Message_Block *mb; - - ACE_NEW_RETURN (mb, ACE_Message_Block (BUFSIZ), 0); - - n = ACE_OS::read (ACE_STDIN, mb->rd_ptr (), mb->size ()); - - if (n <= 0) - { - // Send a shutdown message to the other thread and exit. - mb->length (0); - if (msg_queue->enqueue_tail (mb) == -1) - ACE_ERROR ((LM_ERROR, "(%t) %p\n", "put_next")); - break; - } - - // Send the message to the other thread. - else - { - mb->msg_priority (n); - mb->wr_ptr (n); - if (msg_queue->enqueue_tail (mb) == -1) - ACE_ERROR ((LM_ERROR, "(%t) %p\n", "put_next")); - } - } - - return 0; -} - -// The consumer dequeues a message from the ACE_Message_Queue, writes -// the message to the stderr stream, and deletes the message. The -// producer sends a 0-sized message to inform the consumer to stop -// reading and exit. - -static void *consumer (ACE_Message_Queue<ACE_MT_SYNCH> *msg_queue) -{ - int result = 0; - - // Keep looping, reading a message out of the queue, until we timeout - // or get a message with a length == 0, which signals us to quit. - - for (;;) - { - ACE_Message_Block *mb; - - ACE_Time_Value timeout (ACE_OS::time (0) + 4, 0); // Wait for upto 4 seconds - - result = msg_queue->dequeue_head (mb, &timeout); - - if (result == -1) - break; - - int length = mb->length (); - - if (length > 0) - ACE_OS::write (ACE_STDOUT, mb->rd_ptr (), length); - - mb->release (); - - if (length == 0) - break; - } - - if (result == -1 && errno == EWOULDBLOCK) - ACE_ERROR ((LM_ERROR, "(%t) %p\n%a", "timed out waiting for message", 1)); - - return 0; -} - -// Spawn off two threads that copy stdin to stdout. - -int -main (int, char *[]) -{ - // Message list. - ACE_Message_Queue<ACE_MT_SYNCH> msg_queue; - - if (thr_mgr.spawn (ACE_THR_FUNC (producer), (void *) &msg_queue, - THR_NEW_LWP | THR_DETACHED) == -1) - ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "spawn"), 1); - else if (thr_mgr.spawn (ACE_THR_FUNC (consumer), (void *) &msg_queue, - THR_NEW_LWP | THR_DETACHED) == -1) - ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "spawn"), 1); - - // Wait for producer and consumer threads to exit. - thr_mgr.wait (); - return 0; -} -#else -int -main (int, char *[]) -{ - ACE_ERROR ((LM_ERROR, "threads not supported on this platform\n")); - return 0; -} -#endif /* ACE_HAS_THREADS */ |