1/* 2 * Copyright (c) 2012 Ronald S. Bultje <rsbultje@gmail.com> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#ifndef AVUTIL_ATOMIC_GCC_H 22#define AVUTIL_ATOMIC_GCC_H 23 24#include <stdint.h> 25 26#include "atomic.h" 27 28#define avpriv_atomic_int_get atomic_int_get_gcc 29static inline int atomic_int_get_gcc(volatile int *ptr) 30{ 31 __sync_synchronize(); 32 return *ptr; 33} 34 35#define avpriv_atomic_int_set atomic_int_set_gcc 36static inline void atomic_int_set_gcc(volatile int *ptr, int val) 37{ 38 *ptr = val; 39 __sync_synchronize(); 40} 41 42#define avpriv_atomic_int_add_and_fetch atomic_int_add_and_fetch_gcc 43static inline int atomic_int_add_and_fetch_gcc(volatile int *ptr, int inc) 44{ 45 return __sync_add_and_fetch(ptr, inc); 46} 47 48#define avpriv_atomic_ptr_cas atomic_ptr_cas_gcc 49static inline void *atomic_ptr_cas_gcc(void * volatile *ptr, 50 void *oldval, void *newval) 51{ 52#ifdef __ARMCC_VERSION 53 // armcc will throw an error if ptr is not an integer type 54 volatile uintptr_t *tmp = (volatile uintptr_t*)ptr; 55 return (void*)__sync_val_compare_and_swap(tmp, oldval, newval); 56#else 57 return __sync_val_compare_and_swap(ptr, oldval, newval); 58#endif 59} 60 61#endif /* AVUTIL_ATOMIC_GCC_H */ 62