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