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