diff options
author | Derek Buitenhuis <derek.buitenhuis@gmail.com> | 2018-11-07 20:34:12 +0300 |
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committer | Derek Buitenhuis <derek.buitenhuis@gmail.com> | 2018-11-09 20:43:32 +0300 |
commit | f225ad7a7072f9515e5e6d56eb74a04d7dec0661 (patch) | |
tree | 0c02a5753f1f781d9f8e6702fe424b194ce96f5a /include/compat | |
parent | d253401a59bf27e9a015c23a1aaf45b36f25d8e3 (diff) |
Add stdatomic fallback for GCC 4.7/4.8
This compiler version is still shipped with the latest version of
some distros, like RHEL/CentOS, sadly.
This implementation requires on the __atomic functions.
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
Diffstat (limited to 'include/compat')
-rw-r--r-- | include/compat/gcc/stdatomic.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/include/compat/gcc/stdatomic.h b/include/compat/gcc/stdatomic.h new file mode 100644 index 0000000..6d16a2c --- /dev/null +++ b/include/compat/gcc/stdatomic.h @@ -0,0 +1,47 @@ +/* +* Copyright © 2018, VideoLAN and dav1d authors +* All rights reserved. +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions are met: +* +* 1. Redistributions of source code must retain the above copyright notice, this +* list of conditions and the following disclaimer. +* +* 2. Redistributions in binary form must reproduce the above copyright notice, +* this list of conditions and the following disclaimer in the documentation +* and/or other materials provided with the distribution. +* +* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR +* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND +* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +*/ + +#ifndef GCCVER_STDATOMIC_H_ +#define GCCVER_STDATOMIC_H_ + +#if !defined(__cplusplus) + +typedef int atomic_int; +typedef unsigned int atomic_uint; + +#define memory_order_relaxed __ATOMIC_RELAXED +#define memory_order_acquire __ATOMIC_ACQUIRE + +#define atomic_init(p_a, v) do { *(p_a) = (v); } while(0) +#define atomic_store(p_a, v) __atomic_store_n(p_a, v, __ATOMIC_SEQ_CST) +#define atomic_load(p_a) __atomic_load_n(p_a, __ATOMIC_SEQ_CST) +#define atomic_load_explicit(p_a, mo) __atomic_load_n(p_a, mo) +#define atomic_fetch_add(p_a, inc) __atomic_fetch_add(p_a, inc, __ATOMIC_SEQ_CST) +#define atomic_fetch_sub(p_a, dec) __atomic_fetch_sub(p_a, dec, __ATOMIC_SEQ_CST) + +#endif /* !defined(__cplusplus) */ + +#endif /* GCCVER_STDATOMIC_H_ */ |