forked from KolibriOS/kolibrios
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com>
|
||
|
|
*
|
||
|
|
* 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
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef AVUTIL_ATOMIC_GCC_H
|
||
|
|
#define AVUTIL_ATOMIC_GCC_H
|
||
|
|
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
#include "atomic.h"
|
||
|
|
|
||
|
|
#define avpriv_atomic_int_get atomic_int_get_gcc
|
||
|
|
static inline int atomic_int_get_gcc(volatile int *ptr)
|
||
|
|
{
|
||
|
|
#if HAVE_ATOMIC_COMPARE_EXCHANGE
|
||
|
|
return __atomic_load_n(ptr, __ATOMIC_SEQ_CST);
|
||
|
|
#else
|
||
|
|
__sync_synchronize();
|
||
|
|
return *ptr;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#define avpriv_atomic_int_set atomic_int_set_gcc
|
||
|
|
static inline void atomic_int_set_gcc(volatile int *ptr, int val)
|
||
|
|
{
|
||
|
|
#if HAVE_ATOMIC_COMPARE_EXCHANGE
|
||
|
|
__atomic_store_n(ptr, val, __ATOMIC_SEQ_CST);
|
||
|
|
#else
|
||
|
|
*ptr = val;
|
||
|
|
__sync_synchronize();
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#define avpriv_atomic_int_add_and_fetch atomic_int_add_and_fetch_gcc
|
||
|
|
static inline int atomic_int_add_and_fetch_gcc(volatile int *ptr, int inc)
|
||
|
|
{
|
||
|
|
#if HAVE_ATOMIC_COMPARE_EXCHANGE
|
||
|
|
return __atomic_add_fetch(ptr, inc, __ATOMIC_SEQ_CST);
|
||
|
|
#else
|
||
|
|
return __sync_add_and_fetch(ptr, inc);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#define avpriv_atomic_ptr_cas atomic_ptr_cas_gcc
|
||
|
|
static inline void *atomic_ptr_cas_gcc(void * volatile *ptr,
|
||
|
|
void *oldval, void *newval)
|
||
|
|
{
|
||
|
|
#if HAVE_SYNC_VAL_COMPARE_AND_SWAP
|
||
|
|
#ifdef __ARMCC_VERSION
|
||
|
|
// armcc will throw an error if ptr is not an integer type
|
||
|
|
volatile uintptr_t *tmp = (volatile uintptr_t*)ptr;
|
||
|
|
return (void*)__sync_val_compare_and_swap(tmp, oldval, newval);
|
||
|
|
#else
|
||
|
|
return __sync_val_compare_and_swap(ptr, oldval, newval);
|
||
|
|
#endif
|
||
|
|
#else
|
||
|
|
__atomic_compare_exchange_n(ptr, &oldval, newval, 0, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
|
||
|
|
return oldval;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* AVUTIL_ATOMIC_GCC_H */
|