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