mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-25 13:30:31 +00:00
8854eac118
Original commit message from CVS: - First pass at cleaning up the atomic mess - moved weird asm to datastructure that makes sense - this should also make the trasition to libatomic less painful
118 lines
3.2 KiB
C
118 lines
3.2 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.
|
|
*/
|
|
|
|
#ifndef __GST_ATOMIC_H__
|
|
#define __GST_ATOMIC_H__
|
|
|
|
/* FIXME */
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#ifdef HAVE_ATOMIC_H
|
|
# include <asm/atomic.h>
|
|
#endif
|
|
|
|
#include <glib.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
typedef struct _GstAtomicInt GstAtomicInt;
|
|
|
|
struct _GstAtomicInt {
|
|
#ifdef HAVE_ATOMIC_H
|
|
union {
|
|
atomic_t value;
|
|
struct {
|
|
int value;
|
|
GMutex *lock;
|
|
} unused;
|
|
} v;
|
|
#else
|
|
int value;
|
|
GMutex *lock;
|
|
#endif
|
|
};
|
|
|
|
#ifdef HAVE_ATOMIC_H
|
|
|
|
/* atomic functions */
|
|
#define GST_ATOMIC_INT_INIT(ref, val) (atomic_set(&((ref)->v.value), (val)))
|
|
#define GST_ATOMIC_INT_FREE(ref)
|
|
|
|
#define GST_ATOMIC_INT_SET(ref,val) (atomic_set(&((ref)->v.value), (val)))
|
|
#define GST_ATOMIC_INT_VALUE(ref) (atomic_read(&((ref)->v.value)))
|
|
#define GST_ATOMIC_INT_READ(ref,res) (*res = atomic_read(&((ref)->v.value)))
|
|
#define GST_ATOMIC_INT_INC(ref) (atomic_inc (&((ref)->v.value)))
|
|
#define GST_ATOMIC_INT_DEC_AND_TEST(ref,zero) (*zero = atomic_dec_and_test (&((ref)->v.value)))
|
|
#define GST_ATOMIC_INT_ADD(ref, count) (atomic_add ((count), &((ref)->v.value)))
|
|
|
|
#else
|
|
|
|
/* fallback using a lock */
|
|
#define GST_ATOMIC_INT_INIT(ref, val) \
|
|
G_STMT_START { \
|
|
(ref)->value = (val); \
|
|
(ref)->lock = g_mutex_new(); \
|
|
} G_STMT_END
|
|
|
|
#define GST_ATOMIC_INT_FREE(ref) g_mutex_free ((ref)->lock)
|
|
|
|
#define GST_ATOMIC_INT_SET(ref,val) \
|
|
G_STMT_START { \
|
|
g_mutex_lock ((ref)->lock); \
|
|
(ref)->value = (val); \
|
|
g_mutex_unlock ((ref)->lock); \
|
|
} G_STMT_END
|
|
|
|
#define GST_ATOMIC_INT_VALUE(ref) ((ref)->value)
|
|
#define GST_ATOMIC_INT_READ(ref,res) \
|
|
G_STMT_START { \
|
|
g_mutex_lock ((ref)->lock); \
|
|
*res = (ref)->value; \
|
|
g_mutex_unlock ((ref)->lock); \
|
|
} G_STMT_END
|
|
|
|
#define GST_ATOMIC_INT_INC(ref) \
|
|
G_STMT_START { \
|
|
g_mutex_lock ((ref)->lock); \
|
|
(ref)->value++; \
|
|
g_mutex_unlock ((ref)->lock); \
|
|
} G_STMT_END
|
|
|
|
#define GST_ATOMIC_INT_DEC_AND_TEST(ref,zero) \
|
|
G_STMT_START { \
|
|
g_mutex_lock ((ref)->lock); \
|
|
(ref)->value--; \
|
|
*zero = ((ref)->value == 0); \
|
|
g_mutex_unlock ((ref)->lock); \
|
|
} G_STMT_END
|
|
|
|
#define GST_ATOMIC_INT_ADD(ref, count) \
|
|
G_STMT_START { \
|
|
g_mutex_lock ((ref)->lock); \
|
|
(ref)->value += count; \
|
|
g_mutex_unlock ((ref)->lock); \
|
|
} G_STMT_END
|
|
|
|
#endif /* HAVE_ATOMIC_H */
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_ATOMIC_H__ */
|