gstreamer/gst/gstthreaddummy.c
Wim Taymans 69b7a292d6 Added a runtime option to use a dummy threading implementation that uses
Original commit message from CVS:
Added a runtime option to use a dummy threading implementation that uses
NOPs for all synchronisation and threading operations.
2002-06-21 14:50:00 +00:00

152 lines
3.6 KiB
C

/* 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 <sys/time.h>
#include <glib.h>
#include "gstlog.h"
static GMutex *mutex = NULL;
static GCond *cond = NULL;
static GMutex*
gst_mutex_new_dummy_impl (void)
{
if (!mutex)
mutex = g_malloc (8);
return mutex;
}
static void gst_mutex_dummy_impl (GMutex *mutex) { /* NOP */ }
static gboolean
gst_mutex_trylock_dummy_impl (GMutex *mutex)
{
return TRUE;
}
static GCond*
gst_cond_new_dummy_impl (void)
{
if (!cond)
cond = g_malloc (8);
return cond;
}
static void
gst_cond_dummy_impl (GCond *cond) { /* NOP */ }
static gboolean
gst_cond_timed_wait_dummy_impl (GCond *cond, GMutex *mutex, GTimeVal *end_time)
{
struct timeval tvtarget;
GTimeVal tvnow;
guint64 now, target;
gint64 diff;
target = end_time->tv_sec * 1000000 + end_time->tv_usec;
g_get_current_time (&tvnow);
now = tvnow.tv_sec * 1000000 + tvnow.tv_usec;
diff = target - now;
if (diff > 1000) {
tvtarget.tv_usec = diff % 1000000;
tvtarget.tv_sec = diff / 1000000;
select(0, NULL, NULL, NULL, &tvtarget);
}
return TRUE;
}
static GPrivate*
gst_private_new_dummy_impl (GDestroyNotify destructor)
{
gpointer data;
data = g_new0 (gpointer, 1);
return (GPrivate *) data;
}
static gpointer
gst_private_get_dummy_impl (GPrivate *private_key)
{
gpointer *data = (gpointer) private_key;
return *data;
}
static void
gst_private_set_dummy_impl (GPrivate *private_key, gpointer data)
{
*((gpointer*)private_key) = data;
}
static void
gst_thread_create_dummy_impl (GThreadFunc func, gpointer data, gulong stack_size,
gboolean joinable, gboolean bound, GThreadPriority priority,
gpointer thread, GError **error)
{
g_warning ("GStreamer configured to not use threads");
}
static void
gst_thread_dummy_impl (void) { /* NOP */ }
static void
gst_thread_dummy_impl_1 (gpointer thread) { /* NOP */ }
static void
gst_thread_set_priority_dummy_impl (gpointer thread, GThreadPriority priority) { /* NOP */ }
static gboolean
gst_thread_equal_dummy_impl (gpointer thread1, gpointer thread2)
{
return (thread1 == thread2);
}
GThreadFunctions
gst_thread_dummy_functions =
{
gst_mutex_new_dummy_impl,
(void (*)(GMutex *)) gst_mutex_dummy_impl,
gst_mutex_trylock_dummy_impl,
(void (*)(GMutex *)) gst_mutex_dummy_impl,
gst_mutex_dummy_impl,
gst_cond_new_dummy_impl,
(void (*)(GCond *)) gst_cond_dummy_impl,
(void (*)(GCond *)) gst_cond_dummy_impl,
(void (*)(GCond *, GMutex *)) gst_cond_dummy_impl,
gst_cond_timed_wait_dummy_impl,
gst_cond_dummy_impl,
gst_private_new_dummy_impl,
gst_private_get_dummy_impl,
gst_private_set_dummy_impl,
gst_thread_create_dummy_impl,
gst_thread_dummy_impl,
gst_thread_dummy_impl_1,
gst_thread_dummy_impl,
gst_thread_set_priority_dummy_impl,
gst_thread_dummy_impl_1,
gst_thread_equal_dummy_impl
};