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// $Id$
/* To illustrate the ACE_Message_Queue, we use a derivative of
ACE_Task<>. We also derive from ACE_Message_Block to show that we
don't have memory leaks. */
#include "task.h"
#include "block.h"
int
run_test (int iterations,
int threads)
{
/* Create and start an instance of our Task object. */
Task task (threads);
if (task.open () == -1)
ACE_ERROR_RETURN ((LM_ERROR,
"%p\n",
"open"),
-1);
/* Give the threads a moment to open. This isn't really necessary
but if we don't we find that all of our blocks are constructed and
enqueued before any of the threads get created. Basically, the
sleep() makes the output look more interesting. */
ACE_OS::sleep (ACE_Time_Value (1));
int i;
for (i = 0; i < iterations; ++i)
{
/* Create a new message block to hold our data. Here, we ask
for a block that has 128 bytes of data space. */
Block *message;
ACE_NEW_RETURN (message,
Block (128),
-1);
/* Grab the "write pointer". This is a pointer into the data
area where we can write our data. After writting the data you
have to increment the wr_ptr() so that subsequent writes won't
clobber what you've put there. */
ACE_OS::sprintf (message->wr_ptr (),
"This is message %d.",
i);
message->wr_ptr (ACE_OS::strlen (message->rd_ptr ()));
/* Put the message block into the queue. One of the threads in
the Task object will pick up the block and "do work" on it. */
if (task.putq (message) == -1)
break;
}
/* Once we're done, we have to signal the Task objects to shut
down. There are several choices including: - Send a message of
zero length - Send a message with a special content I don't like
these choices because they're likely to interfere with application
logic. Instead, I use the message type feature to send a message
of type "hangup". The default type is MB_DATA, so when the tasks
get a MB_HANGUP type, they know to go away. */
Block *message;
ACE_NEW_RETURN (message,
Block (),
-1);
message->msg_type (ACE_Message_Block::MB_HANGUP);
task.putq (message);
/* Wait for the threads in our task object to go away. */
task.wait ();
return 0;
}
int
main (int argc, char *argv[])
{
/* Set the number of iterations through our putq() loop and the
number of threads to use in our Task<> derivative. */
int iterations = argc > 1 ? atoi (argv[1]) : 9;
int threads = argc > 2 ? atoi (argv[2]) : 2;
run_test (iterations, threads);
ACE_DEBUG ((LM_DEBUG,
"(%P|%t) Application exiting\n"));
return 0;
}
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