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// ============================================================================
// $Id$
//
// = LIBRARY
// examples
//
// = FILENAME
// collection.cpp
//
// = DESCRIPTION
// Shows how applications can use the ACE_Token_Collection
// utility. This example creates three collections and spawns a
// thread to operate on each. The threads use the collective
// acquire, renew, and release features of ACE_Token_Collection.
//
// = AUTHOR
// Tim Harrison
//
// ============================================================================
#include "ace/OS.h"
#include "ace/Get_Opt.h"
#include "ace/Local_Tokens.h"
#include "ace/Token_Collection.h"
#include "ace/Remote_Tokens.h"
#include "ace/Thread_Manager.h"
#include "ace/Service_Config.h"
#if defined (ACE_HAS_THREADS)
static char *server_host = ACE_DEFAULT_SERVER_HOST;
static int server_port = ACE_DEFAULT_SERVER_PORT;
static int threads = 2;
static int iterations = 50;
static int debug = 0;
static int remote = 0;
static int tokens = 5;
static void *
run_thread (void *vp)
{
ACE_Thread_Control tc (ACE_Service_Config::thr_mgr ());
ACE_Token_Proxy *collection = (ACE_Token_Proxy *) vp;
int count = iterations;
while (count--)
{
if (collection->acquire () == -1)
{
if (ACE_OS::last_error () == EDEADLK)
{
ACE_DEBUG ((LM_DEBUG, "deadlock detected in acquire"));
continue;
}
ACE_ERROR ((LM_ERROR, "(%t) %p acquire failed\n","run_thread"));
return (void *) -1;
}
ACE_DEBUG ((LM_DEBUG, "(%t) %s acquired.\n", collection->name ()));
if (collection->renew () == -1)
{
if (ACE_OS::last_error () == EDEADLK)
{
ACE_DEBUG ((LM_DEBUG, "deadlock detected"));
goto deadlock;
}
ACE_ERROR ((LM_ERROR, "(%t) %p renew failed\n","run_thread"));
return (void *) -1;
}
ACE_DEBUG ((LM_DEBUG, "(%t) %s renewed.\n", collection->name ()));
deadlock:
if (collection->release () == -1)
{
ACE_ERROR ((LM_ERROR, "(%t) %p release failed\n","run_thread"));
return (void *) -1;
}
ACE_DEBUG ((LM_DEBUG, "(%t) %s released.\n", collection->name ()));
}
ACE_DEBUG ((LM_DEBUG, "(%t) thread exiting.\n"));
return 0;
}
static int
parse_args (int argc, char *argv[])
{
ACE_LOG_MSG->open (argv[0], ACE_Log_Msg::STDERR); // | ACE_Log_Msg::VERBOSE);
ACE_Get_Opt get_opt (argc, argv, "un:dp:h:", 1);
for (int c; (c = get_opt ()) != -1; )
{
switch (c)
{
case 'h': // specify the host machine on which the server is running
server_host = get_opt.optarg;
remote = 1;
break;
case 'p': // specify the port on which the server is running
server_port = ACE_OS::atoi (get_opt.optarg);
remote = 1;
break;
case 'd':
debug = 1;
break;
case 'n':
iterations = ACE_OS::atoi (get_opt.optarg);
break;
case 'u':
// usage: fallthrough
default:
ACE_ERROR_RETURN ((LM_ERROR,
"%n:\n"
"[-h <remote host>]\n"
"[-p <remote port>]\n"
"[-n <iterations>]\n"
"[-d debug]\n", 1), -1);
break;
}
}
return 0;
}
int
main (int argc, char* argv[])
{
if (parse_args (argc, argv) == -1)
return -1;
ACE_Token_Proxy *A; // Mutex *A*.
ACE_Token_Proxy *B; // Mutex *B*.
ACE_Token_Proxy *R; // *R*eader Lock.
ACE_Token_Proxy *W; // *W*riter Lock.
// Depending on the command line arguments, we will create local or
// remote tokens. The names of the tokens are not important as long
// as they are unique.
if (remote)
{
ACE_Remote_Mutex::set_server_address (ACE_INET_Addr (server_port, server_host));
A = new ACE_Remote_Mutex ("R Mutex A", 0, debug);
B = new ACE_Remote_Mutex ("R Mutex B", 0, debug);
R = new ACE_Remote_RLock ("R Reader Lock", 0, debug);
W = new ACE_Remote_WLock ("R Writer Lock", 0, debug);
}
else
{
A = new ACE_Local_Mutex ("L Mutex A", 0, debug);
B = new ACE_Local_Mutex ("L Mutex B", 0, debug);
R = new ACE_Local_RLock ("L Reader Lock", 0, debug);
W = new ACE_Local_WLock ("L Writer Lock", 0, debug);
}
// These collections will be treated as Tokens by the threads.
ACE_Token_Collection collectionAR (debug, "A and Reader");
ACE_Token_Collection collectionAW (debug, "A and Writer");
ACE_Token_Collection collectionBR (debug, "B and Reader");
// AR and BR can run concurrently. Neither AR or BR can run when AW
// is running.
collectionAR.insert (*A);
collectionAR.insert (*R);
collectionAW.insert (*A);
collectionAW.insert (*W);
collectionBR.insert (*B);
collectionBR.insert (*R);
// Spawn off three threads.
ACE_Thread_Manager *mgr = ACE_Service_Config::thr_mgr ();
if (mgr->spawn (ACE_THR_FUNC (run_thread),
(void *) &collectionAR, THR_BOUND | THR_SUSPENDED) == -1)
ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "spawn 1 failed"), -1);
if (mgr->spawn (ACE_THR_FUNC (run_thread),
(void *) &collectionAW, THR_BOUND | THR_SUSPENDED) == -1)
ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "spawn 2 failed"), -1);
if (mgr->spawn (ACE_THR_FUNC (run_thread),
(void *) &collectionBR, THR_BOUND | THR_SUSPENDED) == -1)
ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "spawn 3 failed"), -1);
#if ! defined (ACE_HAS_PTHREADS)
if (mgr->resume_all () == -1)
ACE_ERROR_RETURN ((LM_DEBUG, "%p\n", "resume failed"), -1);
#endif
// Wait for all threads to exit.
mgr->wait ();
return 42;
}
#else
int
main (int, char *[])
{
ACE_ERROR_RETURN ((LM_ERROR,
"threads not supported on this platform\n"), -1);
}
#endif /* ACE_HAS_THREADS */
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