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/*
* 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 */
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