mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +02:00
6a93b596c5
The Solaris and Windows emulations of atomic_compare_exchange_strong() need typecasts to avoid compiler warnings, because the functions they call expect a void* pointer but an intptr_t integer is passed. Note that the emulations of atomic_compare_exchange_strong() (except the gcc version) only work for atomic_intptr_t because of the type of the second argument (|expected|). See http://en.cppreference.com/w/c/atomic: _Bool atomic_compare_exchange_strong( volatile A* obj, C* expected, C desired ); The types of the first argument and second argument are different (|A| and |C|, respectively). |C| is the non-atomic type corresponding to |A|. In the emulations of atomic_compare_exchange_strong(), |C| is intptr_t. This implies |A| can only be sig_intptr_t. Signed-off-by: Wan-Teh Chang <wtc@google.com>
181 lines
5.5 KiB
C
181 lines
5.5 KiB
C
/*
|
|
* 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
|
|
*/
|
|
|
|
#ifndef LIBAV_COMPAT_ATOMICS_WIN32_STDATOMIC_H
|
|
#define LIBAV_COMPAT_ATOMICS_WIN32_STDATOMIC_H
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <windows.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) \
|
|
MemoryBarrier();
|
|
|
|
#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;
|
|
|
|
#define atomic_store(object, desired) \
|
|
do { \
|
|
*(object) = (desired); \
|
|
MemoryBarrier(); \
|
|
} while (0)
|
|
|
|
#define atomic_store_explicit(object, desired, order) \
|
|
atomic_store(object, desired)
|
|
|
|
#define atomic_load(object) \
|
|
(MemoryBarrier(), *(object))
|
|
|
|
#define atomic_load_explicit(object, order) \
|
|
atomic_load(object)
|
|
|
|
#define atomic_exchange(object, desired) \
|
|
InterlockedExchangePointer(object, desired);
|
|
|
|
#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)
|
|
{
|
|
intptr_t old = *expected;
|
|
*expected = (intptr_t)InterlockedCompareExchangePointer(
|
|
(PVOID *)object, (PVOID)desired, (PVOID)old);
|
|
return *expected == 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)
|
|
|
|
#ifdef _WIN64
|
|
#define atomic_fetch_add(object, operand) \
|
|
InterlockedExchangeAdd64(object, operand)
|
|
|
|
#define atomic_fetch_sub(object, operand) \
|
|
InterlockedExchangeAdd64(object, -(operand))
|
|
|
|
#define atomic_fetch_or(object, operand) \
|
|
InterlockedOr64(object, operand)
|
|
|
|
#define atomic_fetch_xor(object, operand) \
|
|
InterlockedXor64(object, operand)
|
|
|
|
#define atomic_fetch_and(object, operand) \
|
|
InterlockedAnd64(object, operand)
|
|
#else
|
|
#define atomic_fetch_add(object, operand) \
|
|
InterlockedExchangeAdd(object, operand)
|
|
|
|
#define atomic_fetch_sub(object, operand) \
|
|
InterlockedExchangeAdd(object, -(operand))
|
|
|
|
#define atomic_fetch_or(object, operand) \
|
|
InterlockedOr(object, operand)
|
|
|
|
#define atomic_fetch_xor(object, operand) \
|
|
InterlockedXor(object, operand)
|
|
|
|
#define atomic_fetch_and(object, operand) \
|
|
InterlockedAnd(object, operand)
|
|
#endif /* _WIN64 */
|
|
|
|
#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_WIN32_STDATOMIC_H */
|