119 lines
3.2 KiB
C
119 lines
3.2 KiB
C
/*
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* Copyright © 2017 Gražvydas Ignotas
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#if defined(MISSING_64BIT_ATOMICS) && defined(HAVE_PTHREAD)
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#include <stdint.h>
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#include <pthread.h>
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#if defined(HAVE_FUNC_ATTRIBUTE_WEAK) && !defined(__CYGWIN__)
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#define WEAK __attribute__((weak))
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#else
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#define WEAK
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#endif
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static pthread_mutex_t sync_mutex = PTHREAD_MUTEX_INITIALIZER;
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#ifdef __clang__
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#pragma clang diagnostic ignored "-Wmissing-prototypes"
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#pragma redefine_extname __sync_add_and_fetch_8_c __sync_add_and_fetch_8
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#pragma redefine_extname __sync_sub_and_fetch_8_c __sync_sub_and_fetch_8
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#pragma redefine_extname __sync_fetch_and_add_8_c __sync_fetch_and_add_8
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#pragma redefine_extname __sync_fetch_and_sub_8_c __sync_fetch_and_sub_8
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#pragma redefine_extname __sync_val_compare_and_swap_8_c \
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__sync_val_compare_and_swap_8
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#define __sync_add_and_fetch_8 __sync_add_and_fetch_8_c
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#define __sync_sub_and_fetch_8 __sync_sub_and_fetch_8_c
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#define __sync_fetch_and_add_8 __sync_fetch_and_add_8_c
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#define __sync_fetch_and_sub_8 __sync_fetch_and_sub_8_c
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#define __sync_val_compare_and_swap_8 __sync_val_compare_and_swap_8_c
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#endif
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WEAK uint64_t
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__sync_add_and_fetch_8(uint64_t *ptr, uint64_t val)
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{
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uint64_t r;
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pthread_mutex_lock(&sync_mutex);
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*ptr += val;
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r = *ptr;
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pthread_mutex_unlock(&sync_mutex);
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return r;
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}
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WEAK uint64_t
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__sync_sub_and_fetch_8(uint64_t *ptr, uint64_t val)
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{
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uint64_t r;
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pthread_mutex_lock(&sync_mutex);
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*ptr -= val;
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r = *ptr;
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pthread_mutex_unlock(&sync_mutex);
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return r;
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}
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WEAK uint64_t
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__sync_fetch_and_add_8(uint64_t *ptr, uint64_t val)
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{
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uint64_t r;
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pthread_mutex_lock(&sync_mutex);
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r = *ptr;
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*ptr += val;
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pthread_mutex_unlock(&sync_mutex);
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return r;
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}
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WEAK uint64_t
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__sync_fetch_and_sub_8(uint64_t *ptr, uint64_t val)
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{
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uint64_t r;
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pthread_mutex_lock(&sync_mutex);
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r = *ptr;
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*ptr -= val;
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pthread_mutex_unlock(&sync_mutex);
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return r;
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}
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WEAK uint64_t
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__sync_val_compare_and_swap_8(uint64_t *ptr, uint64_t oldval, uint64_t newval)
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{
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uint64_t r;
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pthread_mutex_lock(&sync_mutex);
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r = *ptr;
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if (*ptr == oldval)
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*ptr = newval;
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pthread_mutex_unlock(&sync_mutex);
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return r;
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}
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#endif
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