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/* t-thread.c
* Copyright 2012 g10 Code GmbH
*
* This file is free software; as a special exception the author gives
* unlimited permission to copy and/or distribute it, with or without
* modifications, as long as this notice is preserved.
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "t-support.h"
static int counter;
static npth_mutex_t counter_mutex;
static int thread_twoone_ready;
static void *
thread_one (void *arg)
{
int rc, i;
info_msg ("thread-one started");
npth_usleep (10); /* Give the other thread some time to start. */
for (i=0; i < 10; i++)
{
/* We would not need the mutex here, but we use it to allow the
system to switch to another thread. */
rc = npth_mutex_lock (&counter_mutex);
fail_if_err (rc);
counter++;
rc = npth_mutex_unlock (&counter_mutex);
fail_if_err (rc);
}
info_msg ("thread-one terminated");
return (void*)4711;
}
static void *
thread_twoone (void *arg)
{
int rc;
npth_setname_np (npth_self (), "thread-twoone");
info_msg ("thread-twoone started");
rc = npth_detach (npth_self ());
fail_if_err (rc);
while (counter < 100)
{
npth_usleep (1000);
counter++;
}
info_msg ("thread-twoone terminated");
thread_twoone_ready = 1;
return NULL;
}
static void *
thread_two (void *arg)
{
int rc, i;
info_msg ("thread-two started");
for (i=0; i < 10; i++)
{
rc = npth_mutex_lock (&counter_mutex);
fail_if_err (rc);
counter--;
if (i == 5)
{
npth_t tid;
info_msg ("creating thread-twoone");
rc = npth_create (&tid, NULL, thread_twoone, NULL);
fail_if_err (rc);
npth_usleep (10); /* Give new thread some time to start. */
}
rc = npth_mutex_unlock (&counter_mutex);
fail_if_err (rc);
}
info_msg ("busy waiting for thread twoone");
while (!thread_twoone_ready)
npth_sleep (0);
info_msg ("thread-two terminated");
return (void*)4722;
}
int
main (int argc, char *argv[])
{
int rc;
npth_attr_t tattr;
int state;
npth_t tid1, tid2;
void *retval;
if (argc >= 2 && !strcmp (argv[1], "--verbose"))
opt_verbose = 1;
rc = npth_init ();
fail_if_err (rc);
rc = npth_mutex_init (&counter_mutex, NULL);
fail_if_err (rc);
rc = npth_attr_init (&tattr);
fail_if_err (rc);
rc = npth_attr_getdetachstate (&tattr, &state);
fail_if_err (rc);
if ( state != NPTH_CREATE_JOINABLE )
fail_msg ("new tattr is not joinable");
info_msg ("creating thread-one");
rc = npth_create (&tid1, &tattr, thread_one, NULL);
fail_if_err (rc);
npth_setname_np (tid1, "thread-one");
info_msg ("creating thread-two");
rc = npth_create (&tid2, &tattr, thread_two, NULL);
fail_if_err (rc);
npth_setname_np (tid2, "thread-two");
rc = npth_attr_destroy (&tattr);
fail_if_err (rc);
info_msg ("waiting for thread-one to terminate");
rc = npth_join (tid1, &retval);
fail_if_err (rc);
if (retval != (void*)4711)
fail_msg ("thread-one returned an unexpected value");
info_msg ("waiting for thread-two to terminate");
rc = npth_join (tid2, &retval);
fail_if_err (rc);
if (retval != (void*)4722)
fail_msg ("thread-two returned an unexpected value");
if (counter != 100)
fail_msg ("counter value not as expected");
return 0;
}
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