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/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <glib.h>
typedef struct
{
GMutex *mutex;
GCond *cond;
gint var;
} ThreadInfo;
static void *
thread_loop (void *arg)
{
ThreadInfo *info = (ThreadInfo *) arg;
g_print ("thread: entering %p\n", info);
g_print ("thread: lock\n");
g_mutex_lock (info->mutex);
g_print ("thread: signal spinup\n");
g_cond_signal (info->cond);
g_print ("thread: wait ACK\n");
g_cond_wait (info->cond, info->mutex);
info->var = 1;
g_print ("thread: signal var change\n");
g_cond_signal (info->cond);
g_print ("thread: unlock\n");
g_mutex_unlock (info->mutex);
g_print ("thread: exit\n");
return NULL;
}
gint
main (gint argc, gchar * argv[])
{
ThreadInfo *info;
GThread *thread;
GError *error = NULL;
gint res = 0;
if (!g_thread_supported ())
g_thread_init (NULL);
info = g_new (ThreadInfo, 1);
info->mutex = g_mutex_new ();
info->cond = g_cond_new ();
info->var = 0;
g_print ("main: lock\n");
g_mutex_lock (info->mutex);
thread = g_thread_create (thread_loop, info, TRUE, &error);
if (error != NULL) {
g_print ("Unable to start thread: %s\n", error->message);
g_error_free (error);
res = -1;
goto done;
}
g_print ("main: wait spinup\n");
g_cond_wait (info->cond, info->mutex);
g_print ("main: signal ACK\n");
g_cond_signal (info->cond);
g_print ("main: waiting for thread to change var\n");
g_cond_wait (info->cond, info->mutex);
g_print ("main: var == %d\n", info->var);
if (info->var != 1)
g_print ("main: !!error!! expected var == 1, got %d\n", info->var);
g_mutex_unlock (info->mutex);
g_print ("main: join\n");
g_thread_join (thread);
done:
g_mutex_free (info->mutex);
g_cond_free (info->cond);
g_free (info);
return res;
}
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