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体验新版 GitCode,发现更多精彩内容 >>
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f9a6a80e
编写于
7月 17, 2016
作者:
A
Anton Khirnov
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差异文件
Add a compat stdatomic.h implementation based on pthreads
Adapted from the code by Rémi Denis-Courmont from VLC
上级
bb81ed47
变更
3
隐藏空白更改
内联
并排
Showing
3 changed file
with
239 addition
and
0 deletion
+239
-0
compat/atomics/pthread/stdatomic.c
compat/atomics/pthread/stdatomic.c
+39
-0
compat/atomics/pthread/stdatomic.h
compat/atomics/pthread/stdatomic.h
+197
-0
configure
configure
+3
-0
未找到文件。
compat/atomics/pthread/stdatomic.c
0 → 100644
浏览文件 @
f9a6a80e
/*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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
*/
#include <pthread.h>
#include <stdint.h>
#include "stdatomic.h"
static
pthread_mutex_t
atomic_lock
=
PTHREAD_MUTEX_INITIALIZER
;
void
avpriv_atomic_lock
(
void
)
{
pthread_mutex_lock
(
&
atomic_lock
);
}
void
avpriv_atomic_unlock
(
void
)
{
pthread_mutex_unlock
(
&
atomic_lock
);
}
compat/atomics/pthread/stdatomic.h
0 → 100644
浏览文件 @
f9a6a80e
/*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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 LIBAV_COMPAT_ATOMICS_PTHREAD_STDATOMIC_H
#define LIBAV_COMPAT_ATOMICS_PTHREAD_STDATOMIC_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_signal_fence(order) \
((void)0)
#define atomic_is_lock_free(obj) 0
typedef
intptr_t
atomic_flag
;
typedef
intptr_t
atomic_bool
;
typedef
intptr_t
atomic_char
;
typedef
intptr_t
atomic_schar
;
typedef
intptr_t
atomic_uchar
;
typedef
intptr_t
atomic_short
;
typedef
intptr_t
atomic_ushort
;
typedef
intptr_t
atomic_int
;
typedef
intptr_t
atomic_uint
;
typedef
intptr_t
atomic_long
;
typedef
intptr_t
atomic_ulong
;
typedef
intptr_t
atomic_llong
;
typedef
intptr_t
atomic_ullong
;
typedef
intptr_t
atomic_wchar_t
;
typedef
intptr_t
atomic_int_least8_t
;
typedef
intptr_t
atomic_uint_least8_t
;
typedef
intptr_t
atomic_int_least16_t
;
typedef
intptr_t
atomic_uint_least16_t
;
typedef
intptr_t
atomic_int_least32_t
;
typedef
intptr_t
atomic_uint_least32_t
;
typedef
intptr_t
atomic_int_least64_t
;
typedef
intptr_t
atomic_uint_least64_t
;
typedef
intptr_t
atomic_int_fast8_t
;
typedef
intptr_t
atomic_uint_fast8_t
;
typedef
intptr_t
atomic_int_fast16_t
;
typedef
intptr_t
atomic_uint_fast16_t
;
typedef
intptr_t
atomic_int_fast32_t
;
typedef
intptr_t
atomic_uint_fast32_t
;
typedef
intptr_t
atomic_int_fast64_t
;
typedef
intptr_t
atomic_uint_fast64_t
;
typedef
intptr_t
atomic_intptr_t
;
typedef
intptr_t
atomic_uintptr_t
;
typedef
intptr_t
atomic_size_t
;
typedef
intptr_t
atomic_ptrdiff_t
;
typedef
intptr_t
atomic_intmax_t
;
typedef
intptr_t
atomic_uintmax_t
;
void
avpriv_atomic_lock
(
void
);
void
avpriv_atomic_unlock
(
void
);
static
inline
void
atomic_thread_fence
(
int
order
)
{
avpriv_atomic_lock
();
avpriv_atomic_unlock
();
}
static
inline
void
atomic_store
(
intptr_t
*
object
,
intptr_t
desired
)
{
avpriv_atomic_lock
();
*
object
=
desired
;
avpriv_atomic_unlock
();
}
#define atomic_store_explicit(object, desired, order) \
atomic_store(object, desired)
static
inline
intptr_t
atomic_load
(
intptr_t
*
object
)
{
intptr_t
ret
;
avpriv_atomic_lock
();
ret
=
*
object
;
avpriv_atomic_unlock
();
return
ret
;
}
#define atomic_load_explicit(object, order) \
atomic_load(object)
static
inline
intptr_t
atomic_exchange
(
intptr_t
*
object
,
intptr_t
desired
)
{
intptr_t
ret
;
avpriv_atomic_lock
();
ret
=
*
object
;
*
object
=
desired
;
avpriv_atomic_unlock
();
return
ret
;
}
#define atomic_exchange_explicit(object, desired, order) \
atomic_exchange(object, desired)
static
inline
int
atomic_compare_exchange_strong
(
intptr_t
*
object
,
intptr_t
*
expected
,
intptr_t
desired
)
{
int
ret
;
avpriv_atomic_lock
();
if
(
*
object
==
*
expected
)
{
ret
=
1
;
*
object
=
desired
;
}
else
{
ret
=
0
;
*
expected
=
*
object
;
}
avpriv_atomic_unlock
();
return
ret
;
}
#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 FETCH_MODIFY(opname, op) \
static inline intptr_t atomic_fetch_ ## opname(intptr_t *object, intptr_t operand) \
{ \
intptr_t ret; \
avpriv_atomic_lock(); \
ret = *object; \
*object = *object op operand; \
avpriv_atomic_unlock(); \
return ret; \
}
FETCH_MODIFY
(
add
,
+
)
FETCH_MODIFY
(
sub
,
-
)
FETCH_MODIFY
(
or
,
|
)
FETCH_MODIFY
(
xor
,
^
)
FETCH_MODIFY
(
and
,
&
)
#undef FETCH_MODIFY
#define atomic_fetch_add_explicit(object, operand, order) \
atomic_fetch_add(object, operand)
#define atomic_fetch_sub_explicit(object, operand, order) \
atomic_fetch_sub(object, operand)
#define atomic_fetch_or_explicit(object, operand, order) \
atomic_fetch_or(object, operand)
#define atomic_fetch_xor_explicit(object, operand, order) \
atomic_fetch_sub(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
/* LIBAV_COMPAT_ATOMICS_PTHREAD_STDATOMIC_H */
configure
浏览文件 @
f9a6a80e
...
...
@@ -5080,6 +5080,9 @@ if disabled stdatomic_h; then
add_cppflags
'-I\$(SRC_PATH)/compat/atomics/win32'
elif
enabled atomics_suncc
;
then
add_cppflags
'-I\$(SRC_PATH)/compat/atomics/suncc'
elif
enabled pthreads
;
then
add_compat atomics/pthread/stdatomic.o
add_cppflags
'-I\$(SRC_PATH)/compat/atomics/pthread'
fi
fi
...
...
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