diff options
Diffstat (limited to 'examples/ASX/Message_Queue')
| -rw-r--r-- | examples/ASX/Message_Queue/ASX_Message_Queue.mpc | 24 | ||||
| -rw-r--r-- | examples/ASX/Message_Queue/bounded_buffer.cpp | 140 | ||||
| -rw-r--r-- | examples/ASX/Message_Queue/buffer_stream.cpp | 311 | ||||
| -rw-r--r-- | examples/ASX/Message_Queue/priority_buffer.cpp | 145 |
4 files changed, 0 insertions, 620 deletions
diff --git a/examples/ASX/Message_Queue/ASX_Message_Queue.mpc b/examples/ASX/Message_Queue/ASX_Message_Queue.mpc deleted file mode 100644 index 8488a7dc89f..00000000000 --- a/examples/ASX/Message_Queue/ASX_Message_Queue.mpc +++ /dev/null @@ -1,24 +0,0 @@ -// -*- MPC -*- -// $Id$ - -project(*Bounded_Buffer) : aceexe { - exename = bounded_buffer - Source_Files { - bounded_buffer.cpp - } -} - -project(*Buffer_Stream) : aceexe { - exename = buffer_stream - Source_Files { - buffer_stream.cpp - } -} - -project(*Priority_Buffer) : aceexe { - exename = priority_buffer - Source_Files { - priority_buffer.cpp - } -} - diff --git a/examples/ASX/Message_Queue/bounded_buffer.cpp b/examples/ASX/Message_Queue/bounded_buffer.cpp deleted file mode 100644 index ada4c6304d1..00000000000 --- a/examples/ASX/Message_Queue/bounded_buffer.cpp +++ /dev/null @@ -1,140 +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" -#include "ace/OS_NS_time.h" -#include "ace/OS_NS_unistd.h" - -ACE_RCSID(Message_Queue, bounded_buffer, "$Id$") - -#if defined (ACE_HAS_THREADS) - -// 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->wr_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 (ACE_Thread_Manager::instance ()->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 (ACE_Thread_Manager::instance ()->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. - ACE_Thread_Manager::instance ()->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 */ diff --git a/examples/ASX/Message_Queue/buffer_stream.cpp b/examples/ASX/Message_Queue/buffer_stream.cpp deleted file mode 100644 index b17d4a85d19..00000000000 --- a/examples/ASX/Message_Queue/buffer_stream.cpp +++ /dev/null @@ -1,311 +0,0 @@ -// $Id$ - -// This short program copies stdin to stdout via the use of an ASX -// Stream. It illustrates an implementation of the classic "bounded -// buffer" program using an ASX Stream containing two Modules. Each -// ACE_Module contains two Tasks. Each ACE_Task contains a -// ACE_Message_Queue and a pointer to a ACE_Thread_Manager. Note how -// the use of these reusable components reduces the reliance on global -// variables, as compared with the bounded_buffer.C example. - -#include "ace/OS_NS_stdio.h" -#include "ace/OS_NS_string.h" -#include "ace/OS_NS_time.h" -#include "ace/OS_NS_unistd.h" -#include "ace/Service_Config.h" -#include "ace/Stream.h" -#include "ace/Module.h" -#include "ace/Task.h" - -ACE_RCSID(Message_Queue, buffer_stream, "$Id$") - -#if defined (ACE_HAS_THREADS) - -typedef ACE_Stream<ACE_MT_SYNCH> MT_Stream; -typedef ACE_Module<ACE_MT_SYNCH> MT_Module; -typedef ACE_Task<ACE_MT_SYNCH> MT_Task; - -class Common_Task : public MT_Task - // = TITLE - // Methods that are common to the producer and consumer. -{ -public: - Common_Task (void) {} - // ACE_Task hooks - virtual int open (void * = 0); - virtual int close (u_long = 0); -}; - -// Define the Producer interface. - -class Producer : public Common_Task -{ -public: - Producer (void) {} - - // Read data from stdin and pass to consumer. - virtual int svc (void); -}; - -class Consumer : public Common_Task - // = TITLE - // Define the Consumer interface. -{ -public: - Consumer (void) {} - - virtual int put (ACE_Message_Block *mb, - ACE_Time_Value *tv = 0); - // Enqueue the message on the ACE_Message_Queue for subsequent - // handling in the svc() method. - - virtual int svc (void); - // Receive message from producer and print to stdout. - -private: - - ACE_Time_Value timeout_; -}; - -class Filter : public MT_Task - // = TITLE - // Defines a Filter that prepends a line number in front of each - // line. -{ -public: - Filter (void): count_ (1) {} - - virtual int put (ACE_Message_Block *mb, - ACE_Time_Value *tv = 0); - // Change the size of the message before passing it downstream. - -private: - size_t count_; - // Count the number of lines passing through the filter. -}; - -// Spawn off a new thread. - -int -Common_Task::open (void *) -{ - if (this->activate (THR_NEW_LWP | THR_DETACHED) == -1) - ACE_ERROR_RETURN ((LM_ERROR, - "%p\n", - "spawn"), - -1); - return 0; -} - -int -Common_Task::close (u_long exit_status) -{ - ACE_DEBUG ((LM_DEBUG, - "(%t) thread is exiting with status %d in module %s\n", - exit_status, - this->name ())); - - // Can do anything here that is required when a thread exits, e.g., - // storing thread-specific information in some other storage - // location, etc. - return 0; -} - -// The Consumer 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. - -int -Producer::svc (void) -{ - // Keep reading stdin, until we reach EOF. - - for (int n; ; ) - { - // Allocate a new message (add one to avoid nasty boundary - // conditions). - - ACE_Message_Block *mb; - - ACE_NEW_RETURN (mb, - ACE_Message_Block (BUFSIZ + 1), - -1); - - n = ACE_OS::read (ACE_STDIN, mb->wr_ptr (), BUFSIZ); - - if (n <= 0) - { - // Send a shutdown message to the other thread and exit. - mb->length (0); - - if (this->put_next (mb) == -1) - ACE_ERROR ((LM_ERROR, - "(%t) %p\n", - "put_next")); - break; - } - - // Send the message to the other thread. - else - { - mb->wr_ptr (n); - // NUL-terminate the string (since we use strlen() on it - // later). - mb->rd_ptr ()[n] = '\0'; - - if (this->put_next (mb) == -1) - ACE_ERROR ((LM_ERROR, - "(%t) %p\n", - "put_next")); - } - } - - return 0; -} - -// Simply enqueue the Message_Block into the end of the queue. - -int -Consumer::put (ACE_Message_Block *mb, ACE_Time_Value *tv) -{ - return this->putq (mb, tv); -} - -// The consumer dequeues a message from the ACE_Message_Queue, writes -// the message to the stderr stream, and deletes the message. The -// Consumer sends a 0-sized message to inform the consumer to stop -// reading and exit. - -int -Consumer::svc (void) -{ - 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; - - // Wait for upto 4 seconds. - this->timeout_.sec (ACE_OS::time (0) + 4); - - result = this->getq (mb, &this->timeout_); - - if (result == -1) - break; - - int length = mb->length (); - - if (length > 0) - ACE_OS::write (ACE_STDOUT, - mb->rd_ptr (), - ACE_OS::strlen (mb->rd_ptr ())); - - 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; -} - -// The filter prepends a line number in front of each line. - -int -Filter::put (ACE_Message_Block *mb, - ACE_Time_Value *tv) -{ - if (mb->length () == 0) - return this->put_next (mb, tv); - else - { - char buf[BUFSIZ]; - - // Stash a copy of the buffer away. - ACE_OS::strncpy (buf, mb->rd_ptr (), sizeof buf); - - // Increase the size of the buffer large enough that it will be - // reallocated (in order to test the reallocation mechanisms). - - mb->size (mb->length () + BUFSIZ); - mb->length (mb->size ()); - - // Prepend the line count in front of the buffer. - ACE_OS::sprintf (mb->rd_ptr (), - ACE_SIZE_T_FORMAT_SPECIFIER": %s", - this->count_++, - buf); - return this->put_next (mb, tv); - } -} - -// Main driver function. - -int -main (int, char *argv[]) -{ - ACE_Service_Config daemon (argv[0]); - - // This Stream controls hierachically-related active objects. - MT_Stream stream; - - MT_Module *pm; - MT_Module *fm; - MT_Module *cm; - - ACE_NEW_RETURN (cm, - MT_Module ("Consumer", - new Consumer), - -1); - ACE_NEW_RETURN (fm, - MT_Module ("Filter", - new Filter), - -1); - ACE_NEW_RETURN (pm, - MT_Module ("Producer", - new Producer), - -1); - - // Create Consumer, Filter, and Producer Modules and push them onto - // the Stream. All processing is performed in the Stream. - - if (stream.push (cm) == -1) - ACE_ERROR_RETURN ((LM_ERROR, - "%p\n", - "push"), - 1); - else if (stream.push (fm) == -1) - ACE_ERROR_RETURN ((LM_ERROR, - "%p\n", - "push"), - 1); - else if (stream.push (pm) == -1) - ACE_ERROR_RETURN ((LM_ERROR, - "%p\n", - "push"), - 1); - // Barrier synchronization: wait for the threads to exit, then exit - // ourselves. - ACE_Thread_Manager::instance ()->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 */ diff --git a/examples/ASX/Message_Queue/priority_buffer.cpp b/examples/ASX/Message_Queue/priority_buffer.cpp deleted file mode 100644 index 26603c7dc64..00000000000 --- a/examples/ASX/Message_Queue/priority_buffer.cpp +++ /dev/null @@ -1,145 +0,0 @@ -// $Id$ - -// This short program prints the contents of stdin to stdout sorted by -// the length of each line via the use of an ASX Message_Queue. It -// illustrates how priorities can be used for ACE Message_Queues. - -#include "ace/OS_NS_stdio.h" -#include "ace/Malloc_Base.h" // To get ACE_Allocator -#include "ace/Message_Queue.h" -#include "ace/Read_Buffer.h" -#include "ace/Thread_Manager.h" -#include "ace/Service_Config.h" - -ACE_RCSID(Message_Queue, priority_buffer, "$Id$") - -#if defined (ACE_HAS_THREADS) - -// Global thread manager. -static ACE_Thread_Manager thr_mgr; - -// Make the queue be capable of being *very* large. -static const long max_queue = LONG_MAX; - -// 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) -{ - // 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; - - if (msg_queue->dequeue_head (mb) == -1) - break; - - int length = mb->length (); - - if (length > 0) - ACE_OS::puts (mb->rd_ptr ()); - - // Free up the buffer memory and the Message_Block. - ACE_Allocator::instance ()->free (mb->rd_ptr ()); - mb->release (); - - if (length == 0) - break; - } - - return 0; -} - -// 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) -{ - ACE_Read_Buffer rb (ACE_STDIN); - - // Keep reading stdin, until we reach EOF. - - for (;;) - { - // Allocate a new buffer. - char *buffer = rb.read ('\n'); - - ACE_Message_Block *mb; - - if (buffer == 0) - { - // Send a 0-sized shutdown message to the other thread and - // exit. - - ACE_NEW_RETURN (mb, ACE_Message_Block ((size_t) 0), 0); - - if (msg_queue->enqueue_tail (mb) == -1) - ACE_ERROR ((LM_ERROR, "(%t) %p\n", "put_next")); - break; - } - - // Enqueue the message in priority order. - else - { - // Allocate a new message, but have it "borrow" its memory - // from the buffer. - ACE_NEW_RETURN (mb, ACE_Message_Block (rb.size (), - ACE_Message_Block::MB_DATA, - 0, - buffer), - 0); - mb->msg_priority (rb.size ()); - mb->wr_ptr (rb.size ()); - - ACE_DEBUG ((LM_DEBUG, - "enqueueing message of size %d\n", - mb->msg_priority ())); - - // Enqueue in priority order. - if (msg_queue->enqueue_prio (mb) == -1) - ACE_ERROR ((LM_ERROR, "(%t) %p\n", "put_next")); - } - } - - // Now read all the items out in priority order (i.e., ordered by - // the size of the lines!). - consumer (msg_queue); - - return 0; -} - -// Spawn off one thread that copies stdin to stdout in order of the -// size of each line. - -int -main (int, char *[]) -{ - // Message queue. - ACE_Message_Queue<ACE_MT_SYNCH> msg_queue (max_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); - - // 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 */ |