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https://github.com/jojo61/vdr-plugin-softhdcuvid.git
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98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
///
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/// @file iatomic.h @brief Misc function header file
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///
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/// Copyright (c) 2014 by Johns. All Rights Reserved.
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///
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/// Contributor(s):
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///
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/// License: AGPLv3
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///
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/// This program is free software: you can redistribute it and/or modify
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/// it under the terms of the GNU Affero General Public License as
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/// published by the Free Software Foundation, either version 3 of the
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/// License.
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///
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/// This program 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
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/// GNU Affero General Public License for more details.
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///
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/// $Id: 59e1684aaa6678ecdebb6ce0df6ce5b5f461dd6e $
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//////////////////////////////////////////////////////////////////////////////
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/// @addtogroup iatomic
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/// @{
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#define GCC_VERSION (__GNUC__ * 10000 \
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+ __GNUC_MINOR__ * 100 \
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+ __GNUC_PATCHLEVEL__)
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// gcc before 4.7 didn't support atomic builtins,
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// use alsa atomic functions.
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#if GCC_VERSION < 40700
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#include <alsa/iatomic.h>
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#else
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//////////////////////////////////////////////////////////////////////////////
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// Defines
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// Declares
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//////////////////////////////////////////////////////////////////////////////
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///
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/// atomic type, 24 bit useable,
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///
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typedef volatile int atomic_t;
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//////////////////////////////////////////////////////////////////////////////
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// Prototypes
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//////////////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////////////
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// Inlines
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//////////////////////////////////////////////////////////////////////////////
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///
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/// Set atomic value.
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///
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#define atomic_set(ptr, val) \
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__atomic_store_n(ptr, val, __ATOMIC_SEQ_CST)
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///
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/// Read atomic value.
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///
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#define atomic_read(ptr) \
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__atomic_load_n(ptr, __ATOMIC_SEQ_CST)
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///
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/// Increment atomic value.
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///
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#define atomic_inc(ptr) \
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__atomic_add_fetch(ptr, 1, __ATOMIC_SEQ_CST)
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///
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/// Decrement atomic value.
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///
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#define atomic_dec(ptr) \
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__atomic_sub_fetch(ptr, 1, __ATOMIC_SEQ_CST)
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///
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/// Add to atomic value.
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///
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#define atomic_add(val, ptr) \
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__atomic_add_fetch(ptr, val, __ATOMIC_SEQ_CST)
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///
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/// Subtract from atomic value.
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///
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#define atomic_sub(val, ptr) \
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__atomic_sub_fetch(ptr, val, __ATOMIC_SEQ_CST)
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#endif
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/// @}
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