mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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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
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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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#ifndef __GST_ATOMIC_H__
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#define __GST_ATOMIC_H__
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/* FIXME */
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_ATOMIC_H
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# include <asm/atomic.h>
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#endif
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#include <glib.h>
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G_BEGIN_DECLS
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typedef struct _GstAtomicInt GstAtomicInt;
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struct _GstAtomicInt {
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#ifdef HAVE_ATOMIC_H
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union {
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atomic_t value;
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struct {
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int value;
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GMutex *lock;
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} unused;
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} v;
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#else
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int value;
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GMutex *lock;
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#endif
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};
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#ifdef HAVE_ATOMIC_H
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/* atomic functions */
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#define GST_ATOMIC_INT_INIT(ref, val) (atomic_set(&((ref)->v.value), (val)))
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#define GST_ATOMIC_INT_FREE(ref)
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#define GST_ATOMIC_INT_SET(ref,val) (atomic_set(&((ref)->v.value), (val)))
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#define GST_ATOMIC_INT_VALUE(ref) (atomic_read(&((ref)->v.value)))
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#define GST_ATOMIC_INT_READ(ref,res) (*res = atomic_read(&((ref)->v.value)))
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#define GST_ATOMIC_INT_INC(ref) (atomic_inc (&((ref)->v.value)))
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#define GST_ATOMIC_INT_DEC_AND_TEST(ref,zero) (*zero = atomic_dec_and_test (&((ref)->v.value)))
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#define GST_ATOMIC_INT_ADD(ref, count) (atomic_add ((count), &((ref)->v.value)))
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#else
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/* fallback using a lock */
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#define GST_ATOMIC_INT_INIT(ref, val) \
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G_STMT_START { \
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(ref)->value = (val); \
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(ref)->lock = g_mutex_new(); \
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} G_STMT_END
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#define GST_ATOMIC_INT_FREE(ref) g_mutex_free ((ref)->lock)
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#define GST_ATOMIC_INT_SET(ref,val) \
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G_STMT_START { \
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g_mutex_lock ((ref)->lock); \
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(ref)->value = (val); \
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g_mutex_unlock ((ref)->lock); \
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} G_STMT_END
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#define GST_ATOMIC_INT_VALUE(ref) ((ref)->value)
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#define GST_ATOMIC_INT_READ(ref,res) \
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G_STMT_START { \
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g_mutex_lock ((ref)->lock); \
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*res = (ref)->value; \
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g_mutex_unlock ((ref)->lock); \
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} G_STMT_END
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#define GST_ATOMIC_INT_INC(ref) \
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G_STMT_START { \
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g_mutex_lock ((ref)->lock); \
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(ref)->value++; \
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g_mutex_unlock ((ref)->lock); \
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} G_STMT_END
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#define GST_ATOMIC_INT_DEC_AND_TEST(ref,zero) \
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G_STMT_START { \
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g_mutex_lock ((ref)->lock); \
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(ref)->value--; \
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*zero = ((ref)->value == 0); \
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g_mutex_unlock ((ref)->lock); \
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} G_STMT_END
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#define GST_ATOMIC_INT_ADD(ref, count) \
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G_STMT_START { \
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g_mutex_lock ((ref)->lock); \
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(ref)->value += count; \
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g_mutex_unlock ((ref)->lock); \
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} G_STMT_END
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#endif /* HAVE_ATOMIC_H */
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G_END_DECLS
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#endif /* __GST_ATOMIC_H__ */
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