mirror of https://git.ffmpeg.org/ffmpeg.git
Add a compat stdatomic.h implementation based on GCC atomics
Adapted from the code by Rémi Denis-Courmont from VLC
This merges libav commit 4e928ef340.
Signed-off-by: Wan-Teh Chang <wtc@google.com>
Reviewed-by: wm4 <nfxjfg@googlemail.com>
Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
Anton Khirnov
James Almer
parent
4059cd3952
commit
3359eede8f
|
|
@ -0,0 +1,173 @@
|
|||
/*
|
||||
* This file is part of FFmpeg.
|
||||
*
|
||||
* FFmpeg is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License as published by the Free Software Foundation; either
|
||||
* version 2.1 of the License, or (at your option) any later version.
|
||||
*
|
||||
* FFmpeg 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
|
||||
* Lesser General Public License for more details.
|
||||
*
|
||||
* You should have received a copy of the GNU Lesser General Public
|
||||
* License along with FFmpeg; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
/*
|
||||
* based on vlc_atomic.h from VLC
|
||||
* Copyright (C) 2010 Rémi Denis-Courmont
|
||||
*/
|
||||
|
||||
#ifndef FFMPEG_COMPAT_ATOMICS_GCC_STDATOMIC_H
|
||||
#define FFMPEG_COMPAT_ATOMICS_GCC_STDATOMIC_H
|
||||
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
|
||||
#define ATOMIC_FLAG_INIT 0
|
||||
|
||||
#define ATOMIC_VAR_INIT(value) (value)
|
||||
|
||||
#define atomic_init(obj, value) \
|
||||
do { \
|
||||
*(obj) = (value); \
|
||||
} while(0)
|
||||
|
||||
#define kill_dependency(y) ((void)0)
|
||||
|
||||
#define atomic_thread_fence(order) \
|
||||
__sync_synchronize()
|
||||
|
||||
#define atomic_signal_fence(order) \
|
||||
((void)0)
|
||||
|
||||
#define atomic_is_lock_free(obj) 0
|
||||
|
||||
typedef _Bool atomic_flag;
|
||||
typedef _Bool atomic_bool;
|
||||
typedef char atomic_char;
|
||||
typedef signed char atomic_schar;
|
||||
typedef unsigned char atomic_uchar;
|
||||
typedef short atomic_short;
|
||||
typedef unsigned short atomic_ushort;
|
||||
typedef int atomic_int;
|
||||
typedef unsigned int atomic_uint;
|
||||
typedef long atomic_long;
|
||||
typedef unsigned long atomic_ulong;
|
||||
typedef long long atomic_llong;
|
||||
typedef unsigned long long atomic_ullong;
|
||||
typedef wchar_t atomic_wchar_t;
|
||||
typedef int_least8_t atomic_int_least8_t;
|
||||
typedef uint_least8_t atomic_uint_least8_t;
|
||||
typedef int_least16_t atomic_int_least16_t;
|
||||
typedef uint_least16_t atomic_uint_least16_t;
|
||||
typedef int_least32_t atomic_int_least32_t;
|
||||
typedef uint_least32_t atomic_uint_least32_t;
|
||||
typedef int_least64_t atomic_int_least64_t;
|
||||
typedef uint_least64_t atomic_uint_least64_t;
|
||||
typedef int_fast8_t atomic_int_fast8_t;
|
||||
typedef uint_fast8_t atomic_uint_fast8_t;
|
||||
typedef int_fast16_t atomic_int_fast16_t;
|
||||
typedef uint_fast16_t atomic_uint_fast16_t;
|
||||
typedef int_fast32_t atomic_int_fast32_t;
|
||||
typedef uint_fast32_t atomic_uint_fast32_t;
|
||||
typedef int_fast64_t atomic_int_fast64_t;
|
||||
typedef uint_fast64_t atomic_uint_fast64_t;
|
||||
typedef intptr_t atomic_intptr_t;
|
||||
typedef uintptr_t atomic_uintptr_t;
|
||||
typedef size_t atomic_size_t;
|
||||
typedef ptrdiff_t atomic_ptrdiff_t;
|
||||
typedef intmax_t atomic_intmax_t;
|
||||
typedef uintmax_t atomic_uintmax_t;
|
||||
|
||||
#define atomic_store(object, desired) \
|
||||
do { \
|
||||
*(object) = (desired); \
|
||||
__sync_synchronize(); \
|
||||
} while (0)
|
||||
|
||||
#define atomic_store_explicit(object, desired, order) \
|
||||
atomic_store(object, desired)
|
||||
|
||||
#define atomic_load(object) \
|
||||
(__sync_synchronize(), *(object))
|
||||
|
||||
#define atomic_load_explicit(object, order) \
|
||||
atomic_load(object)
|
||||
|
||||
#define atomic_exchange(object, desired) \
|
||||
({ \
|
||||
typeof(object) _obj = (object); \
|
||||
typeof(*object) _old; \
|
||||
do \
|
||||
_old = atomic_load(_obj); \
|
||||
while (!__sync_bool_compare_and_swap(_obj, _old, (desired))); \
|
||||
_old; \
|
||||
})
|
||||
|
||||
#define atomic_exchange_explicit(object, desired, order) \
|
||||
atomic_exchange(object, desired)
|
||||
|
||||
#define atomic_compare_exchange_strong(object, expected, desired) \
|
||||
({ \
|
||||
typeof(object) _exp = (expected); \
|
||||
typeof(*object) _old = *_exp; \
|
||||
*_exp = __sync_val_compare_and_swap((object), _old, (desired)); \
|
||||
*_exp == _old; \
|
||||
})
|
||||
|
||||
#define atomic_compare_exchange_strong_explicit(object, expected, desired, success, failure) \
|
||||
atomic_compare_exchange_strong(object, expected, desired)
|
||||
|
||||
#define atomic_compare_exchange_weak(object, expected, desired) \
|
||||
atomic_compare_exchange_strong(object, expected, desired)
|
||||
|
||||
#define atomic_compare_exchange_weak_explicit(object, expected, desired, success, failure) \
|
||||
atomic_compare_exchange_weak(object, expected, desired)
|
||||
|
||||
#define atomic_fetch_add(object, operand) \
|
||||
__sync_fetch_and_add(object, operand)
|
||||
|
||||
#define atomic_fetch_add_explicit(object, operand, order) \
|
||||
atomic_fetch_add(object, operand)
|
||||
|
||||
#define atomic_fetch_sub(object, operand) \
|
||||
__sync_fetch_and_sub(object, operand)
|
||||
|
||||
#define atomic_fetch_sub_explicit(object, operand, order) \
|
||||
atomic_fetch_sub(object, operand)
|
||||
|
||||
#define atomic_fetch_or(object, operand) \
|
||||
__sync_fetch_and_or(object, operand)
|
||||
|
||||
#define atomic_fetch_or_explicit(object, operand, order) \
|
||||
atomic_fetch_or(object, operand)
|
||||
|
||||
#define atomic_fetch_xor(object, operand) \
|
||||
__sync_fetch_and_sub(object, operand)
|
||||
|
||||
#define atomic_fetch_xor_explicit(object, operand, order) \
|
||||
atomic_fetch_sub(object, operand)
|
||||
|
||||
#define atomic_fetch_and(object, operand) \
|
||||
__sync_fetch_and_and(object, operand)
|
||||
|
||||
#define atomic_fetch_and_explicit(object, operand, order) \
|
||||
atomic_fetch_and(object, operand)
|
||||
|
||||
#define atomic_flag_test_and_set(object) \
|
||||
atomic_exchange(object, 1)
|
||||
|
||||
#define atomic_flag_test_and_set_explicit(object, order) \
|
||||
atomic_flag_test_and_set(object)
|
||||
|
||||
#define atomic_flag_clear(object) \
|
||||
atomic_store(object, 0)
|
||||
|
||||
#define atomic_flag_clear_explicit(object, order) \
|
||||
atomic_flag_clear(object)
|
||||
|
||||
#endif /* FFMPEG_COMPAT_ATOMICS_GCC_STDATOMIC_H */
|
||||
|
|
@ -6381,6 +6381,12 @@ for thread in $THREADS_LIST; do
|
|||
fi
|
||||
done
|
||||
|
||||
if disabled stdatomic_h; then
|
||||
if enabled atomics_gcc; then
|
||||
add_cppflags '-I\$(SRC_PATH)/compat/atomics/gcc'
|
||||
fi
|
||||
fi
|
||||
|
||||
enabled zlib && add_cppflags -DZLIB_CONST
|
||||
|
||||
# conditional library dependencies, in linking order
|
||||
|
|
|
|||
Loading…
Reference in New Issue