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198 lines
5.9 KiB
C
Executable File
198 lines
5.9 KiB
C
Executable File
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* based on vlc_atomic.h from VLC
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* Copyright (C) 2010 Rémi Denis-Courmont
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*/
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#ifndef COMPAT_ATOMICS_PTHREAD_STDATOMIC_H
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#define COMPAT_ATOMICS_PTHREAD_STDATOMIC_H
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#include <stdint.h>
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#define ATOMIC_FLAG_INIT 0
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#define ATOMIC_VAR_INIT(value) (value)
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#define atomic_init(obj, value) \
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do { \
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*(obj) = (value); \
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} while(0)
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#define kill_dependency(y) ((void)0)
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#define atomic_signal_fence(order) \
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((void)0)
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#define atomic_is_lock_free(obj) 0
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typedef intptr_t atomic_flag;
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typedef intptr_t atomic_bool;
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typedef intptr_t atomic_char;
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typedef intptr_t atomic_schar;
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typedef intptr_t atomic_uchar;
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typedef intptr_t atomic_short;
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typedef intptr_t atomic_ushort;
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typedef intptr_t atomic_int;
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typedef intptr_t atomic_uint;
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typedef intptr_t atomic_long;
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typedef intptr_t atomic_ulong;
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typedef intptr_t atomic_llong;
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typedef intptr_t atomic_ullong;
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typedef intptr_t atomic_wchar_t;
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typedef intptr_t atomic_int_least8_t;
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typedef intptr_t atomic_uint_least8_t;
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typedef intptr_t atomic_int_least16_t;
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typedef intptr_t atomic_uint_least16_t;
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typedef intptr_t atomic_int_least32_t;
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typedef intptr_t atomic_uint_least32_t;
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typedef intptr_t atomic_int_least64_t;
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typedef intptr_t atomic_uint_least64_t;
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typedef intptr_t atomic_int_fast8_t;
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typedef intptr_t atomic_uint_fast8_t;
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typedef intptr_t atomic_int_fast16_t;
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typedef intptr_t atomic_uint_fast16_t;
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typedef intptr_t atomic_int_fast32_t;
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typedef intptr_t atomic_uint_fast32_t;
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typedef intptr_t atomic_int_fast64_t;
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typedef intptr_t atomic_uint_fast64_t;
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typedef intptr_t atomic_intptr_t;
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typedef intptr_t atomic_uintptr_t;
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typedef intptr_t atomic_size_t;
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typedef intptr_t atomic_ptrdiff_t;
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typedef intptr_t atomic_intmax_t;
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typedef intptr_t atomic_uintmax_t;
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void avpriv_atomic_lock(void);
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void avpriv_atomic_unlock(void);
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static inline void atomic_thread_fence(int order)
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{
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avpriv_atomic_lock();
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avpriv_atomic_unlock();
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}
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static inline void atomic_store(intptr_t *object, intptr_t desired)
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{
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avpriv_atomic_lock();
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*object = desired;
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avpriv_atomic_unlock();
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}
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#define atomic_store_explicit(object, desired, order) \
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atomic_store(object, desired)
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static inline intptr_t atomic_load(intptr_t *object)
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{
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intptr_t ret;
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avpriv_atomic_lock();
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ret = *object;
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avpriv_atomic_unlock();
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return ret;
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}
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#define atomic_load_explicit(object, order) \
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atomic_load(object)
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static inline intptr_t atomic_exchange(intptr_t *object, intptr_t desired)
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{
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intptr_t ret;
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avpriv_atomic_lock();
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ret = *object;
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*object = desired;
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avpriv_atomic_unlock();
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return ret;
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}
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#define atomic_exchange_explicit(object, desired, order) \
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atomic_exchange(object, desired)
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static inline int atomic_compare_exchange_strong(intptr_t *object, intptr_t *expected,
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intptr_t desired)
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{
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int ret;
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avpriv_atomic_lock();
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if (*object == *expected) {
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ret = 1;
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*object = desired;
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} else {
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ret = 0;
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*expected = *object;
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}
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avpriv_atomic_unlock();
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return ret;
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}
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#define atomic_compare_exchange_strong_explicit(object, expected, desired, success, failure) \
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atomic_compare_exchange_strong(object, expected, desired)
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#define atomic_compare_exchange_weak(object, expected, desired) \
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atomic_compare_exchange_strong(object, expected, desired)
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#define atomic_compare_exchange_weak_explicit(object, expected, desired, success, failure) \
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atomic_compare_exchange_weak(object, expected, desired)
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#define FETCH_MODIFY(opname, op) \
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static inline intptr_t atomic_fetch_ ## opname(intptr_t *object, intptr_t operand) \
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{ \
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intptr_t ret; \
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avpriv_atomic_lock(); \
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ret = *object; \
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*object = *object op operand; \
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avpriv_atomic_unlock(); \
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return ret; \
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}
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FETCH_MODIFY(add, +)
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FETCH_MODIFY(sub, -)
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FETCH_MODIFY(or, |)
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FETCH_MODIFY(xor, ^)
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FETCH_MODIFY(and, &)
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#undef FETCH_MODIFY
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#define atomic_fetch_add_explicit(object, operand, order) \
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atomic_fetch_add(object, operand)
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#define atomic_fetch_sub_explicit(object, operand, order) \
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atomic_fetch_sub(object, operand)
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#define atomic_fetch_or_explicit(object, operand, order) \
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atomic_fetch_or(object, operand)
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#define atomic_fetch_xor_explicit(object, operand, order) \
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atomic_fetch_xor(object, operand)
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#define atomic_fetch_and_explicit(object, operand, order) \
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atomic_fetch_and(object, operand)
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#define atomic_flag_test_and_set(object) \
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atomic_exchange(object, 1)
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#define atomic_flag_test_and_set_explicit(object, order) \
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atomic_flag_test_and_set(object)
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#define atomic_flag_clear(object) \
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atomic_store(object, 0)
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#define atomic_flag_clear_explicit(object, order) \
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atomic_flag_clear(object)
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#endif /* COMPAT_ATOMICS_PTHREAD_STDATOMIC_H */
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